Determination of volatile and residual iodine during the ...

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โˆ’ 395 โˆ’

ANALYTICAL SCIENCE

& TECHNOLOGY

Vol. 22, No. 5, 395-406, 2009

Printed in the Republic of Korea

์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ ์šฉํ•ด ์ค‘ ํœ˜๋ฐœ ๋ฐ ์ž”๋ฅ˜ ์š”์˜ค๋“œ ๋ถ„์„

๊น€์ •์„โ˜…ยท๋ฐ•์ˆœ๋‹ฌยท์ „์˜์‹ ยทํ•˜์˜๊ฒฝยท์†ก๊ทœ์„

ํ•œ๊ตญ์›์ž๋ ฅ์—ฐ๊ตฌ์› ์›์ž๋ ฅํ™”ํ•™์—ฐ๊ตฌ๋ถ€

(2009. 5. 29. ์ ‘์ˆ˜, 2009. 9. 14. ์Šน์ธ)

Determination of volatile and residual iodine during thedissolution of spent nuclear fuel

Jung Suk Kimโ˜…, Soon Dal Park, Young Shin Jeon, Young Keong Ha and Kyuseok Song

Nuclear Chemistry Research Division, KAERI, 150-1, Deokjin-dong, Yuseong-gu, Daejeon 305-353, Korea

(Received May 29, 2009; Accepted September 14, 2009)

์š” ์•ฝ: ์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ์‹œ๋ฃŒ ์ค‘์˜ ์š”์˜ค๋“œ๋ฅผ ์ •๋Ÿ‰ํ•˜๊ณ  ์šฉํ•ด๊ณผ์ • ์ค‘ ์š”์˜ค๋“œ์˜ ํœ˜๋ฐœ๊ฑฐ๋™์„ ์กฐ์‚ฌํ•˜๊ธฐ ์œ„ํ•˜

์—ฌ ์ค‘์„ฑ์ž ๋ฐฉ์‚ฌํ™” ๋ถ„์„(NAA) ๋ฐ ์ „์ž๋ฏธ์„ธํƒ์นจ๋ถ„์„(EPMA)์„ ์ด์šฉํ•˜์˜€๋‹ค. ๋ชจ์˜ ์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ์‹œ๋ฃŒ

(SIMFUELs)๋ฅผ ์ค€๋น„ํ•˜์—ฌ HNO3(1+1) ์šฉ์•ก์œผ๋กœ 90 oC์—์„œ 8 ์‹œ๊ฐ„ ์šฉํ•ดํ•˜๊ณ  ์šฉํ•ด ํ›„ ์šฉํ•ด์šฉ์•ก ์ค‘์— ์ž”๋ฅ˜

๋œ ์š”์˜ค๋“œ, ์šฉํ•ด์žฅ์น˜์— ์‘์ถ•๋œ ์š”์˜ค๋“œ ๋ฐ ํœ˜๋ฐœํ•˜์—ฌ ํก์ฐฉ์ฒด์— ํฌ์ง‘๋œ ์š”์˜ค๋“œ ๊ฐ๊ฐ์„ ์ •๋Ÿ‰ํ•˜์˜€๋‹ค. ์‘์ถ•๋œ

์š”์˜ค๋“œ๋Š” ์žฅ์น˜๋‚ด ์šฉํ•ด์šฉ์•ก์„ ์˜ฎ๊ธด ํ›„ HNO3(1+1) ์šฉ์•ก์œผ๋กœ ์žฌ์ฆ๋ฅ˜ํ•˜์—ฌ ํšŒ์ˆ˜ํ•˜์˜€๋‹ค. ์šฉํ•ด ๋ฐ ์žฌ์ฆ๋ฅ˜ ์šฉ์•ก

์ค‘์˜ ์š”์˜ค๋“œ๋Š” ์šฉ๋งค์ถ”์ถœ๊ณผ ์ด์˜จ๊ตํ™˜ ๋ฐ ์นจ์ „๋ฒ•์œผ๋กœ ๋ถ„๋ฆฌํ•œ ํ›„ ๋ฐฉ์‚ฌํ™”ํ•™์  ์ค‘์„ฑ์ž ๋ฐฉ์‚ฌํ™” ๋ถ„์„(RNAA)์œผ

๋กœ ์ •๋Ÿ‰ํ•˜์˜€๋‹ค. ์š”์˜ค๋“œ ๋ถ„๋ฆฌ์— ์‚ฌ์šฉํ•œ ์ด์˜จ๊ตํ™˜๋ถ„๋ฆฌ๊ด€ ๋ฐ ์—ฌ๊ณผํ‚คํŠธ๋Š” ํด๋ฆฌ์—ํ‹ธ๋ Œ ๊ด€์œผ๋กœ ์ œ์ž‘ํ•˜์—ฌ ์ค‘์„ฑ

์ž ์กฐ์‚ฌ๋ฅผ ์œ„ํ•œ ์ด์†ก๊ด€ ๋‚ด๋ถ€์˜ ์‚ฝ์ž…์ฒด(Insert)๋กœ ์ด์šฉํ•˜์˜€๋‹ค. ํ•ต์—ฐ๋ฃŒ์šฉํ•ด ์ค‘ ํœ˜๋ฐœ๋œ ์š”์˜ค๋“œ๋Š” ์ œ์กฐํ•œ ํก

์ฐฉ์ฒด(Ag-Silica gel)๋ฅผ ๋‹ด์€ ํก์ฐฉ๊ด€์— ํฌ์ง‘ํ•˜์˜€๋‹ค. ํก์ฐฉ์ฒด๋ฅผ ๊ตฌ๊ฐ„๋ณ„๋กœ ๋‚˜๋ˆ„์–ด ๊ท ์งˆ์‹œ๋ฃŒ๋กœ ๋งŒ๋“  ๋‹ค์Œ ๋น„ํŒŒ

๊ดด ์ค‘์„ฑ์ž ๋ฐฉ์‚ฌํ™” ๋ถ„์„(INAA)์œผ๋กœ ์ •๋Ÿ‰ํ•˜์˜€๋‹ค. ํก์ฐฉ๋œ ์š”์˜ค๋“œ์˜ ๋ถ„ํฌ๋ฅผ EPMA ๋ถ„์„์œผ๋กœ ์กฐ์‚ฌํ•˜์˜€๋‹ค. ๋ชจ

์˜ ์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ ๋ฐ ์›์ž๋ ฅ๋ฐœ์ „์†Œ๋กœ๋ถ€ํ„ฐ์˜ ์‹ค์ œ ์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ ์‹œ๋ฃŒ๋กœ๋ถ€ํ„ฐ ํœ˜๋ฐœ๋œ ์š”์˜ค๋“œ์˜ ํก์ฐฉํŠน

์„ฑ์„ ๋น„๊ตํ•˜์˜€๋‹ค.

Abstract: The determination of iodine in the spent nuclear fuel and the volatile behavior during its acid

dissolution have been studied by NAA(neutron activation analysis) and electron probe microanalysis (EPMA).

Simulated spent fuels (SIMFUELs) were dissolved in HNO3(1+1) at 90 oC for 8 hours. The iodine remained

in a dissolver solution after dissolution, and that condensed in dissolution apparatus and trapped in the adsorbent

by volatilization during the dissolution were determined, respectively. The condensed iodine was recovered by

the redistillation with HNO3(1+1) after transfer of the dissolver solution. The iodines in the dissolver and

redistilled solution were separated by solvent extraction followed by ion exchange or precipitation method and

determined by RNAA (radiochemical neutron activation analysis). The ion exchange column and filtration kit

used for the isolation of iodine, which were prepared with a polyethylene tube, were used as an insert in the

โ˜… Corresponding author

Phone : +82-(0)42-868-8155 Fax : +82-(0)42 868 8148

E-mail : [email protected]

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396 ๊น€์ •์„ยท๋ฐ•์ˆœ๋‹ฌยท์ „์˜์‹ ยทํ•˜์˜๊ฒฝยท์†ก๊ทœ์„

Analytical Science & Technology

pneumatic tube for neutron irradiation. The iodine volatilized during the dissolution of SIMFUELs was collected

in a trapping tube containing Ag-silica gel (Ag-impregnated silica gel) adsorbent, and the distribution of iodine

trapped in the adsorbents were determined by EPMA. The adsorbing characteristics shown with the SIMFUELs

were compared with those shown with a real spent fuel from the nuclear power plant.

Key words : Iodine, spent nuclear fuel, Ag-silica gel absorbent, NAA, EPMA

1. ์„œ ๋ก 

์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ๋‚ด ์ด ์š”์˜ค๋“œ ๋ฐ ์š”์˜ค๋“œ ๋™์œ„์›์†Œ

๋ถ„์„์€ ์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ ์ค‘์˜ ํ•ต๋ถ„์—ด์ƒ์„ฑ๋ฌผ ๊ด€๋ฆฌ, ๋ฐฉ์‚ฌ

์„ฑ ์š”์˜ค๋“œ์˜ ํšŒ์ˆ˜, ํ•ต์—ฐ๋ฃŒ์ฒ˜๋ถ„ ๋ฐ ํ™˜๊ฒฝ์œผ๋กœ์˜ ๋ฐฉ์ถœ,

๋ฐฐ๊ธฐ์ฒด ์ฒ˜๋ฆฌ์‹œ์„ค์˜ ์„ค๊ณ„๊ณผ์ •์—์„œ ํ๊ธฐ๋ฌผ์ฒ˜๋ฆฌ์™€ ํก์ฐฉ

์ฒด์‚ฌ์šฉ์— ๋Œ€ํ•œ ์ค‘์š”ํ•œ ๊ธฐ์ดˆ์ž๋ฃŒ๋กœ ํ™œ์šฉ๋œ๋‹ค.1-3 ์š”์˜ค๋“œ

๋Š” ์ฃผ์š” ํ•ต๋ถ„์—ด์ƒ์„ฑ๋ฌผ๋กœ์„œ ํ•ต์—ฐ๋ฃŒ ํ”ผ๋ณต๊ด€(zircaloy)์˜

์ŠคํŠธ๋ ˆ์Šค ๋ถ€์‹๊ท ์—ด(stress corrosion cracking)์„ ์ผ์œผํ‚ค

๊ณ  CsI ๋“ฑ ํ•ต์—ฐ๋ฃŒ ์„ฑ๋ถ„์›์†Œ์™€ ํœ˜๋ฐœ์„ฑ ํ™”ํ•ฉ๋ฌผ์„ ํ˜•์„ฑ

ํ•˜๋Š” ๊ฒƒ์œผ๋กœ ์•Œ๋ ค์กŒ๋‹ค. ํŠนํžˆ 129I๋Š” ์ฃผ์š” ํ•ต๋ถ„์—ด์ƒ์„ฑ๋ฌผ

๋กœ์„œ ์กด์žฌํ•˜๋Š” ์š”์˜ค๋“œ์˜ ์ฃผ ๋ฐฉ์‚ฌ์„ฑ ๋™์œ„์›์†Œ์ด๋ฉฐ ๊ธด

๋ฐ˜๊ฐ๊ธฐ(1.6ร—107 years) ๋ฐ ๋†’์€ ํ•ต๋ถ„์—ด์ˆ˜์œจ(0.7%)์„ ๊ฐ€

์ง„๋‹ค. ์š”์˜ค๋“œ๋Š” ํ™”ํ•™์  ์กฐ๊ฑด์— ๋”ฐ๋ผ ํœ˜๋ฐœ ๋ฐ ๋น„ํœ˜๋ฐœ์„ฑ

ํŠน์„ฑ์„ ๊ฐ€์ง€๋ฉฐ, iodide์™€ iodate ๋“ฑ ์—ฌ๋Ÿฌ ์‚ฐํ™”์ƒํƒœ ํ˜น

์€ ์œ ๊ธฐ์„ฑ ์š”์˜ค๋“œ๋กœ ์กด์žฌํ•˜๊ธฐ ๋•Œ๋ฌธ์— ์š”์˜ค๋“œ์˜ ๊ฑฐ๋™

์€ ๋งค์šฐ ๋ณต์žกํ•˜๋‹ค. 127I๊ณผ 129I ๋™์œ„์›์†Œ๋น„๋Š” ์ˆ˜์šฉ์„ฑ ์š”

์˜ค๋“œ์˜ ๋ฐฉ์ถœ, ํŠธ๋ฆฌํŠฌ ์ด๋™ํ˜„์ƒ ์—ฐ๊ตฌ ๋“ฑ์— ํ™œ์šฉ๋˜๊ณ  ์žˆ

์œผ๋ฉฐ, ๋ฐฉ์‚ฌ์„ฑ ์š”์˜ค๋“œ๋Š” International Committe on

Radiological Protection(ICRP) ๊ทœ์•ฝ์— ์˜ํ•˜์—ฌ ํ™˜๊ฒฝ์œผ๋กœ

์˜ ๋ฐฉ์ถœ์„ ๊ทœ์ œํ•˜๊ณ  ์žˆ๋‹ค.4-8

ํ•ต๋ฌผ์งˆ ๋ฐ ํ™˜๊ฒฝ์‹œ๋ฃŒ ์ค‘์˜ ์š”์˜ค๋“œ ๋ฐ ์š”์˜ค๋“œ ๋™์œ„์›

์†Œ ๋ถ„์„์—๋Š”, ๊ธฐ๊ธฐ์  ์ค‘์„ฑ์ž ๋ฐฉ์‚ฌํ™” ๋ถ„์„(INAA,

instrumental neutron activation analysis), ๋ฐฉ์‚ฌ ํ™”ํ•™์ 

์ค‘์„ฑ์ž ๋ฐฉ์‚ฌํ™” ๋ถ„์„(RNAA, radiochemical neutron

activation analysis), ์Œํ‘œ๋ฉด์ด์˜จํ™” ์งˆ๋Ÿ‰๋ถ„์„(negative

surface ionization mass spectrometry), ๊ฐ๋งˆ์„  ๋ถ„๊ด‘ ๋ถ„

์„(gamma-ray spectrometry), ๊ฐ€์†๊ธฐ ์งˆ๋Ÿ‰๋ถ„์„(AMS,

accelerator mass spectrometry), ์œ ๋„์Œ ํ”Œ๋ผ์Šค๋งˆ ์งˆ๋Ÿ‰

๋ถ„์„(ICP-MS, inductively coupled plasma mass spec-

trometry), ์—ด๊ณ„๋Ÿ‰(calorimetry), ๊ธฐ์ฒด ํฌ๋กœ๋งˆํ† ๊ทธ๋ž˜ํ”ผ

(gas chromatography), X์„  ํ˜•๊ด‘๋ถ„๊ด‘๋ฒ•(X-ray fluore-

scence spectrometry), ๋ถ„๊ด‘ ๊ด‘๋„๋ฒ•(spectrophotometry)

๋ฐ ์ด์˜จ์„ ํƒ ์ „๊ทน(ion-selective electrode)์ด ์ฃผ๋กœ ์ด์šฉ

๋˜์—ˆ๋‹ค.9-18

์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ ํ•ต๋ถ„์—ด์ƒ์„ฑ๋ฌผ ์ค‘์— ํฌํ•จ๋œ 129I๋Š”

์ €์—๋„ˆ์ง€ ๋ฒ ํƒ€์ž…์ž(0.15 MeV)๋ฅผ ๋ฐฉ์ถœํ•˜๋ฉด์„œ ๋ถ•๊ดดํ•˜๊ณ ,

๋ถ•๊ดด์™€ ๊ด€๋ จ๋œ ๊ณ ์—๋„ˆ์ง€์˜ ๊ฐ๋งˆ์„ ์„ ๊ฐ€์ง€์ง€ ์•Š๋Š” ์žฅ

๋ฐ˜๊ฐ๊ธฐ์˜ ๋™์œ„์›์†Œ๋กœ์„œ ๋‚ฎ์€ ๋น„๋ฐฉ์‚ฌ๋Šฅ(6.4 Bq/ยตg)์„

๊ฐ€์ง„๋‹ค. ๋”ฐ๋ผ์„œ ์ด๋Ÿฌํ•œ ํ•ต์  ํŠน์„ฑ ๋•Œ๋ฌธ์— ์ง์ ‘ ๋ฐฉ์‚ฌ๋Šฅ

์„ ๊ณ„์ธกํ•˜์—ฌ ๋ถ„์„ํ•˜๋Š” ๋ฐฉ๋ฒ•์€ ์–ด๋ ต๊ณ  ๊ฐ๋„๊ฐ€ ๋‚ฎ๊ธฐ ๋•Œ

๋ฌธ์— ์ค‘์„ฑ์ž ๋ฐฉ์‚ฌํ™”์‹œ์ผœ ๋ถ„์„ํ•˜๋Š” ๋ฐฉ๋ฒ•์ด ํšจ๊ณผ์ ์ธ

๊ฒƒ์œผ๋กœ ์•Œ๋ ค์กŒ๋‹ค. ๊ทธ๋Ÿฌ๋‚˜ ์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ๋Š” ๊ณ ๋ฐฉ์‚ฌ์„ฑ

์˜ ํ•ต๋ถ„์—ด์ƒ์„ฑ๋ฌผ์„ ํฌํ•จํ•˜๊ธฐ ๋•Œ๋ฌธ์— ์‹œ๋ฃŒ ์ค‘์˜ ์š”์˜ค

๋“œ๋ฅผ ์ •๋Ÿ‰ํ•˜๊ธฐ ์œ„ํ•ด์„œ๋Š” ์ค‘์„ฑ์ž ๋ฐฉ์‚ฌํ™” ๋ถ„์„์— ์•ž์„œ

๋ถ„์„์„ ๊ฐ„์„ญํ•˜๋Š” ๊ฐ๋งˆ์„ ๋ฐฉ์ถœ ํ•ต๋ถ„์—ด์ƒ์„ฑ๋ฌผ์„ ํ™”ํ•™์ 

์œผ๋กœ ๋ถ„๋ฆฌ ์ œ๊ฑฐํ•ด์•ผ ํ•œ๋‹ค.19 ์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ ์šฉํ•ด ์ค‘

์— ํœ˜๋ฐœ๋˜๋Š” ํ•ต๋ถ„์—ด์ƒ์„ฑ๋ฌผ ์ค‘์—๋Š” ์š”์˜ค๋“œ๊ฐ€ ํฌํ•จ๋˜์–ด

์žˆ๋‹ค. ํœ˜๋ฐœ ์š”์˜ค๋“œ์ค‘ 129I๋Š” 14C(CO2)์™€ ๋งˆ์ฐฌ๊ฐ€์ง€๋กœ ๋ฒ 

ํƒ€ ๋ฐฉ์ถœ์ฒด๋กœ์„œ ์‚ฌ์ „์— ์ œ๊ฑฐํ•˜์ง€ ์•Š์„ ๊ฒฝ์šฐ 14C ํšŒ์ˆ˜

๋ฐ ์ •๋Ÿ‰์— ์ค‘์š”ํ•œ ์˜ํ–ฅ์„ ๋ฏธ์นœ๋‹ค.20 ํœ˜๋ฐœ์š”์˜ค๋“œ ํฌ์ง‘

์„ ์œ„ํ•œ ํก์ฐฉ์ฒด๋กœ๋Š” Ag-silica gel, Ag-xeolite, ํ™œ์„ฑํƒ„

๋“ฑ์ด ์ด์šฉ๋˜์–ด ์™”๋‹ค.21,22 ์ด ์ค‘ Ag-silica gel์€ ์งˆ์‚ฐ์šฉ

ํ•ด์— ๋‚ด์„ฑ์ด ํฌ๋ฉฐ ์„ฑ๋Šฅ์ด ์˜ค๋ž˜ ์ง€์†๋˜๋Š” ์  ๋“ฑ ์žฅ์ 

์„ ๊ฐ€์ง€๊ณ  ์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ ์šฉํ•ด ์ค‘์— ํœ˜๋ฐœ๋˜๋Š” ์š”์˜ค

๋“œ ํฌ์ง‘์— ์ด์šฉ๋˜์—ˆ๋‹ค.

๋ณธ ์—ฐ๊ตฌ์—์„œ๋Š” ํ•ต์—ฐ๋ฃŒ ์ค‘์˜ ์š”์˜ค๋“œ๋ฅผ ์ •๋Ÿ‰ํ•˜๊ธฐ ์œ„

ํ•˜์—ฌ ํ•ต์—ฐ๋ฃŒ์šฉํ•ด ๊ณผ์ •์— ํœ˜๋ฐœ, ์ž”๋ฅ˜ ๋ฐ ์‘์ถ•๋œ ์š”์˜ค๋“œ

๊ฐ๊ฐ์„ ์ •๋Ÿ‰ํ•˜๊ณ  ํœ˜๋ฐœ๋œ ์š”์˜ค๋“œ์˜ ํก์ฐฉ๊ฑฐ๋™์„ ์•Œ๊ธฐ

์œ„ํ•œ ๋ช‡ ๊ฐ€์ง€ ์‹คํ—˜์„ ์ˆ˜ํ–‰ํ•˜์˜€๋‹ค. ๋จผ์ € ์š”์˜ค๋“œ๋ฅผ ํฌํ•จ

ํ•˜๋Š” ๋ชจ์˜ ์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ์™€ ์š”์˜ค๋“œ ํก์ฐฉ์ฒด์„ ์ œ์กฐํ•˜

๊ณ  ํ•ต์—ฐ๋ฃŒ ์šฉํ•ด์žฅ์น˜ ๋ฐ ๋ฐœ์ƒ๊ธฐ์ฒด ํฌ์ง‘์žฅ์น˜๋ฅผ ์ œ์ž‘ ์„ค

์น˜ํ•˜์˜€๋‹ค. ๋ชจ์˜ ์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ ์šฉํ•ด ํ›„ ์ž”๋ฅ˜ ๋ฐ ์‘์ถ•

๋œ ์š”์˜ค๋“œ๋Š” ์‹œ๋ฃŒ์˜ ์‚ฐํ™”์ƒํƒœ๋ฅผ ์กฐ์ ˆํ•œ ํ›„ ์šฉ๋งค์ถ”์ถœ

๋กœ ์š”์˜ค๋“œ๋ฅผ ํšŒ์ˆ˜ํ•œ ๋‹ค์Œ ์ด์˜จ๊ตํ™˜ ๋˜๋Š” ์นจ์ „๋ฒ•์œผ๋กœ

๋ฐฉ์‚ฌํ™”ํ•™์ ์œผ๋กœ ๋ถ„๋ฆฌํ•œ ํ›„ ์ค‘์„ฑ์ž ๋ฐฉ์‚ฌํ™” ๋ถ„์„์œผ๋กœ

์ •๋Ÿ‰ํ•˜์˜€๋‹ค. ์šฉํ•ด ์ค‘์— ํœ˜๋ฐœ๋œ ์š”์˜ค๋“œ๋Š” ์ œ์กฐํ•œ Ag-

silica gel ํก์ฐฉ์ฒด๋กœ ํฌ์ง‘ํ•œ ๋‹ค์Œ ํก์ฐฉ์ฒด๋ฅผ ๋ถ€๋ถ„๋ณ„๋กœ

๋‚˜๋ˆ„์–ด ๋ถ„์„์‹œ๋ฃŒ๋ฅผ ์ค€๋น„ํ•˜๊ณ  ๊ฐ๊ฐ์˜ ์‹œ๋ฃŒ์— ๋Œ€ํ•ด ๊ธฐ

๊ธฐ์  ์ค‘์„ฑ์ž ๋ฐฉ์‚ฌํ™” ๋ถ„์„๊ณผ EPMA๋ฅผ ์ด์šฉํ•œ ํ‘œ๋ฉด๋ถ„

์„์„ ์ˆ˜ํ–‰ํ•˜์˜€๋‹ค. ๋ชจ์˜ ์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ ๋ถ„์„์— ์ด์šฉํ•œ

์šฉํ•ด ๋ฐ ๋ฐœ์ƒ๊ธฐ์ฒด ํฌ์ง‘์žฅ์น˜๋ฅผ ๋ฐฉ์‚ฌ์„ฑ๊ตฌ์—ญ hot cell ๋‚ด

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์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ ์šฉํ•ด ์ค‘ ํœ˜๋ฐœ ๋ฐ ์ž”๋ฅ˜ ์š”์˜ค๋“œ ๋ถ„์„ 397

Vol. 22, No. 5, 2009

์— ์„ค์น˜ํ•˜๊ณ  ์‹ค์ œ ์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ(PWRํ˜• UO2)๋ฅผ ์šฉ

ํ•ด ๋ฐ ํœ˜๋ฐœ๋œ ์š”์˜ค๋“œ๋ฅผ ํฌ์ง‘ํ•ด ๋ณด์•˜๋‹ค. ๋ชจ์˜ ์‚ฌ์šฉ ํ›„

ํ•ต์—ฐ๋ฃŒ์™€ ๋™์ผํ•œ ๋ฐฉ๋ฒ•์œผ๋กœ ํก์ฐฉ์ฒด์— ๋Œ€ํ•œ ๊ธฐ๊ธฐ์  ์ค‘

์„ฑ์ž ๋ฐฉ์‚ฌํ™” ๋ถ„์„ ๋ฐ EPMA ๋ถ„์„์„ ์ˆ˜ํ–‰ํ•˜์˜€๋‹ค.

2. ์‹ค ํ—˜

2.1. ์‹œ์•ฝ ๋ฐ ๊ธฐ๊ตฌ

์‹คํ—˜์— ์‚ฌ์šฉํ•œ NaClO 5% ์šฉ์•ก์€ Aldrich,

NH2OHยทHCl์€ Aldrich A.C.S. 99%, K2S2O5๋Š” Aldrich

98%, AgNO3๋Š” Aldrich A.C.S. 99%, CsI๋Š” Aldrich

99.99%, Silica gel (70-230 mesh)์€ Aldrich์‚ฌ ์ œํ’ˆ์„

์‚ฌ์šฉํ•˜์˜€๋‹ค. I2 ํ‘œ์ค€์šฉ์•ก์€ Merck 0.1 M solution,

NaNO3๋Š” Merck extra pure 99%, HNO3๋Š” Merck GR

65%, CCl4๋Š” Merck GR 99.8%, NaOH๋Š” Merck GR

99%, Na2S2O3๋Š” Wako Pure Chem. ํŠน๊ธ‰์‹œ์•ฝ์„ ์‚ฌ์šฉ

ํ•˜์˜€๋‹ค. ์Œ์ด์˜จ๊ตํ™˜์ˆ˜์ง€๋Š” Bio Rad์‚ฌ์˜ AG 1X4(200-

400 mesh)๋ฅผ ์‚ฌ์šฉํ•˜์˜€๋‹ค. EPMA๋Š” JEOL์‚ฌ์˜ JXA

8600์„ ์‚ฌ์šฉํ•˜์˜€๋‹ค.

ํ•ต์—ฐ๋ฃŒ์šฉํ•ด ๋ฐ ๋ฐœ์ƒ๊ธฐ์ฒด ํฌ์ง‘์„ ์œ„ํ•œ ๋ชจ์˜ ์‚ฌ์šฉ ํ›„

ํ•ต์—ฐ๋ฃŒ(SIMFUEL) ์‹œ๋ฃŒ๋Š” UO2 ๋ถ„๋ง์— 10 ์ข…์˜ ๋ชจ์˜

ํ•ต๋ถ„์—ด์ƒ์„ฑ๋ฌผ์›์†Œ ๋ถ„๋ง์„ ์„ฑํ˜•ํ•˜์—ฌ pellet์œผ๋กœ ๋งŒ๋“ 

ํ›„ 500 oC์—์„œ ์‚ฐํ™”์‹œ์ผœ U3O8์œผ๋กœ ๋ณ€ํ™˜์‹œ์ผฐ๋‹ค. ์ด ํ›„

1100 oC์˜ ๊ณต๊ธฐ๋ถ„์œ„๊ธฐ์—์„œ 2 ์‹œ๊ฐ„ ๋™์•ˆ ์—ด์ฒ˜๋ฆฌํ•œ ํ›„

๋ถ„๋ง์‹œ๋ฃŒ๋ฅผ ์ค€๋น„ํ•˜์˜€๋‹ค(Table 1). CsI ์šฉ์•ก์„ ๋ณ„๋„ ์ค€

๋น„ํ•˜์—ฌ ์šฉํ•ด ์ „ ์ผ์ •๋Ÿ‰ ์ทจํ•˜์—ฌ SIMFUEL๊ณผ ํ•จ๊ป˜ ์šฉ

ํ•ด์šฉ๊ธฐ์— ๊ฐ€ํ•˜์˜€๋‹ค. ์ œ์กฐ์— ์‚ฌ์šฉํ•œ UO2๋Š” ์›์ž๋กœ๊ธ‰

๊ณ ์ˆœ๋„ ์‚ฐํ™”์šฐ๋ผ๋Š„์œผ๋กœ O/U ๋น„๋Š” 2.04์ด์—ˆ๋‹ค. ์‚ฌ์šฉ

ํ›„ ํ•ต์—ฐ๋ฃŒ์‹œ๋ฃŒ๋Š” ๊ณ ๋ฆฌ 2 ํ˜ธ๊ธฐ์—์„œ ์—ฐ์†Œํ•œ PWRํ˜•

UO2 ์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ ์‹œํŽธ ์ผ์ •๋Ÿ‰์„ ํ™”ํ•™์‹œํ—˜์„ ์œ„ํ•œ

๋ฐฉ์‚ฌ์„ฑ๊ตฌ์—ญ hot cell ์•ˆ์œผ๋กœ ์ด์†กํ•˜์—ฌ ์ค€๋น„ํ•˜์˜€๋‹ค.

2.2. ํ•ต์—ฐ๋ฃŒ์šฉํ•ด ๋ฐ ๋ฐœ์ƒ๊ธฐ์ฒด ํฌ์ง‘์žฅ์น˜ ์„ค์น˜

๋ชจ์˜ ์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ์‹œ๋ฃŒ๋ฅผ ์šฉํ•ดํ•˜๋Š” ์ค‘ ํœ˜๋ฐœ๋˜๋Š”

๊ธฐ์ฒด๋ฅผ ํฌ์ง‘ํ•˜๊ธฐ ์œ„ํ•œ ์žฅ์น˜(Fig. 1)๋ฅผ ํ›„๋“œ ์•ˆ์— ์„ค์น˜

ํ•˜์˜€๋‹ค. ์žฅ์น˜๋Š” ์ „์ฒด์ ์œผ๋กœ ๊ฐœ๋ณ„ ์žฅ์น˜๋ฅผ ์กฐ๋ฆฝ์‹์œผ๋กœ

๊ตฌ์„ฑํ•˜์—ฌ ์„ค์น˜ ๋ฐ ๋ถ„ํ•ด๊ฐ€ ์šฉ์ดํ•˜๊ณ  ๋ถ€๋ถ„์  ๊ต์ฒด๊ฐ€ ๊ฐ€

๋Šฅํ•˜๋„๋ก ํ•˜์˜€๋‹ค. ์šฉํ•ด์šฉ๊ธฐ๋Š” 2 ๊ตฌ ํ”Œ๋ผ์Šคํฌ ํ˜•ํƒœ๋กœ

์ œ์ž‘ํ•˜์—ฌ ๋ถ„๋ณ„๊น”๋•Œ๊ธฐ๋ฅผ ํ†ตํ•˜์—ฌ ์งˆ์‚ฐ์šฉ์•ก์˜ ์ฃผ์ž…์ด ๊ฐ€

๋Šฅํ•˜๋„๋ก ํ•˜์˜€๋‹ค. ์šฉํ•ด ์ค‘์— ํœ˜๋ฐœ๋˜๋Š” ์š”์˜ค๋“œ๋ฅผ ํฌ์ง‘

ํ•˜๊ธฐ ์œ„ํ•œ ํฌ์ง‘๊ด€(๋‚ด๊ฒฝ 1 cm, ๊ธธ์ด 11 cm ์œ ๋ฆฌ๊ด€)์€

์šฉํ•ด์žฅ์น˜์˜ ๋ƒ‰๊ฐ์žฅ์น˜ ์ƒ๋ถ€์— ์—ฐ๊ฒฐ๋˜๋„๋ก ์ œ์ž‘ํ•˜์˜€๋‹ค.

ํฌ์ง‘๊ด€๋‚ด์—๋Š” 22% AgNO3๋ฅผ ์นจ์œค์‹œ์ผœ ์ œ์กฐํ•œ ์‹ค๋ฆฌ์นด

๊ฒ”(Ag-silica gel, 8 mesh) ํก์ฐฉ์ฒด๋ฅผ ์ถฉ์ „์‹œ์ผฐ๋‹ค. ๋˜

ํ•œ ์šฉํ•ด ์ค‘์— ํœ˜๋ฐœ๋˜๋Š” NOx ๊ธฐ์ฒด ๋ฐ 14C(CO2)๋ฅผ ํฌ

์ง‘ํ•˜๊ธฐ ์œ„ํ•˜์—ฌ 1.5 M NaOH ํก์ฐฉ์šฉ์•ก ์ผ์ •๋Ÿ‰(25

mL)์„ ์ฑ„์šด ํฌ์ง‘๊ด€ 2 ๊ฐœ๋ฅผ ์š”์˜ค๋“œ ํฌ์ง‘๊ด€ ๋‹ค์Œ์—

์—ฐ์†์ ์œผ๋กœ ์—ฐ๊ฒฐํ•˜์˜€๋‹ค. ๊ฐ ํฌ์ง‘๊ด€์˜ ๊ธฐ์ฒดํก์ž…๊ตฌ์—

๋Š” ๋ชจ์„ธ๊ด€์„ ์ฑ„์›Œ ๊ธฐ์ฒดํ๋ฆ„์„ ์™„ํ™”์‹œ์ผฐ๋‹ค. ์‹ค์ œ ์‚ฌ

์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ์‹œ๋ฃŒ ์ค‘์˜ ์š”์˜ค๋“œ๋ฅผ ํšŒ์ˆ˜ํ•˜๊ธฐ ์œ„ํ•œ ์žฅ

์น˜๋Š” ์›๊ฒฉ์กฐ์ข…๊ณผ ์žฅ์น˜์˜ ์•ˆ์ „์„ฑ์„ ๊ณ ๋ คํ•˜์—ฌ ๋ชจ์˜ ์‚ฌ

์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ์‹œ๋ฃŒ์— ์ด์šฉํ•œ ์žฅ์น˜๋ฅผ ์•ฝ๊ฐ„ ์ˆ˜์ •ํ•˜์—ฌ

hot cell ๋‚ด์— ์„ค์น˜ํ•˜์˜€๋‹ค. ํœ˜๋ฐœ์š”์˜ค๋“œ ํฌ์ง‘๊ด€์˜ ๊ธธ์ด

๋ฅผ 4 cm๋กœ ์ค„์—ฌ์„œ ์ œ์ž‘์„ค์น˜ํ•˜๊ณ  Ag-silica gel์„ ์ถฉ

์ „์‹œ์ผฐ๋‹ค. ๋˜ํ•œ 14C(CO2)์™€ NOx ๊ธฐ์ฒด ํฌ์ง‘์„ ์œ„ํ•œ

ํฌ์ง‘๊ด€ 2 ๊ฐœ๋„ ์ž‘๊ฒŒ ์ œ์ž‘ํ•˜๊ณ  ๊ฐ๊ฐ์— 1.5 M NaOH

์šฉ์•ก 12.5 mL์”ฉ ์ฑ„์› ๋‹ค.

Table 1. Compositions of simulated spent fuel

Element Added compoundwt.%

(Prepared value)

U UO2 82.394

Nd Nd2O3 0.269

Mo MoO3 0.245

Ce CeO2 0.895

Ru RuO2 0.240

Ba BaCO3 0.106

La La2O3 0.092

Pd PdO 0.092

Sr SrO 0.070

Y Y2O3 0.035

Rh Rh2O3 0.032

O 15.116

I CsI* 0.0225 g

*Supplementary addition

Fig. 1. Dissolution apparatus for nuclear fuel sample.

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398 ๊น€์ •์„ยท๋ฐ•์ˆœ๋‹ฌยท์ „์˜์‹ ยทํ•˜์˜๊ฒฝยท์†ก๊ทœ์„

Analytical Science & Technology

2.3. ํ•ต์—ฐ๋ฃŒ์‹œ๋ฃŒ ์šฉํ•ด

๋ชจ์˜ ์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ์‹œ๋ฃŒ์˜ ๊ฒฝ์šฐ ์‹œ๋ฃŒ 1 g๊ณผ CsI

0.0225 g์„ ๋„ฃ๊ณ  HNO3(1+1) ์šฉ์•ก 40 mL๋ฅผ ์ ๊ฐ€์‹œํ‚จ

๋‹ค์Œ 90 oC์—์„œ 4 ์‹œ๊ฐ„ ํ™˜๋ฅ˜์‹œ์ผœ ์šฉํ•ดํ•˜์˜€๋‹ค. ์šฉํ•ด ์ค‘

ํœ˜๋ฐœ๊ธฐ์ฒด๋ฅผ ๊ณ„์† ํฌ์ง‘ํ•˜๊ณ  ์šฉํ•ด์™„๋ฃŒ ํ›„ 24 ์‹œ๊ฐ„ ๋ฐฉ์น˜

ํ•˜์˜€๋‹ค. ์‹ค์ œ ์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ์‹œ๋ฃŒ์˜ ๊ฒฝ์šฐ hot cell ์•ˆ์œผ

๋กœ ์ด์†ก๋œ ์†Œ๋Ÿ‰์˜ ํ•ต์—ฐ๋ฃŒ๋ฅผ ๋จผ์ € ์›๊ฒฉ์กฐ์ข… ๋””์ง€ํ„ธ์ €์šธ

์„ ์ด์šฉํ•˜์—ฌ ๋ฌด๊ฒŒ๋ฅผ ์ธก์ •ํ•˜์˜€๋‹ค(0.849 g). ์‹œ๋ฃŒ๋ฅผ ์šฉํ•ด

์šฉ๊ธฐ์— ๋„ฃ๊ณ  HNO3(1+1) ์šฉ์•ก ์•ฝ 30 mL๋ฅผ ๊ฐ€ํ•˜๊ณ  90oC์—์„œ 12 ์‹œ๊ฐ„ ํ™˜๋ฅ˜์‹œ์ผœ ์šฉํ•ดํ•˜์˜€๋‹ค. ์šฉํ•ด ์ค‘ ํœ˜๋ฐœ๊ธฐ

์ฒด๋ฅผ ๊ณ„์† ํฌ์ง‘ํ•˜๊ณ  ์šฉํ•ด์™„๋ฃŒ ํ›„ 24 ์‹œ๊ฐ„ ๋ฐฉ์น˜ํ•˜์˜€๋‹ค.

2.4. ํœ˜๋ฐœ์š”์˜ค๋“œ ํก์ฐฉํŠน์„ฑ ๋ถ„์„

ํ•ต์—ฐ๋ฃŒ์šฉํ•ด ์ค‘ ํœ˜๋ฐœ์š”์˜ค๋“œ์˜ ํก์ฐฉ์ฒด์— ๋Œ€ํ•œ ํก์ฐฉํŠน

์„ฑ์„ ์กฐ์‚ฌํ•˜๊ธฐ ์œ„ํ•˜์—ฌ ์•„๋ž˜์™€ ๊ฐ™์ด ์ค€๋น„ํ•œ ์‹œ๋ฃŒ๋“ค์—

๋Œ€ํ•ด EPMA๋ฅผ ์ด์šฉํ•œ EDS (energy dispersive X-ray

emission spectrometry) ๋ฐ SEM (scanning electron mi-

croscopy) ๋ถ„์„์„ ์ˆ˜ํ–‰ํ•˜์˜€๋‹ค. ์‹œ๋ฃŒ S-3~S-7๋Š” ๋ชจ์˜

์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ ๋ฐ ์‹ค์ œ ์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ ์‹œ๋ฃŒ๋ฅผ ์šฉํ•ด

ํ•˜๋Š” ์ค‘ ํœ˜๋ฐœ๋œ ์š”์˜ค๋“œ๋ฅผ ํก์ฐฉ์‹œํ‚จ ํก์ฐฉ๊ด€๋‚ด Ag-

silicagel ํก์ฐฉ์ฒด๋ฅผ ๋ถ€๋ถ„๋ณ„๋กœ ์ทจํ•˜์—ฌ ์ค€๋น„ํ•˜์˜€๋‹ค.

2.5. ํก์ฐฉ์ฒด ์ค‘ ์š”์˜ค๋“œ ๋ถ„์„

ํ•ต์—ฐ๋ฃŒ์šฉํ•ด ์ค‘ ํœ˜๋ฐœ๋œ ๊ธฐ์ฒด๋ฅผ ํฌ์ง‘ํ•œ ํก์ฐฉ์ฒด ์ค‘์˜ ์š”

์˜ค๋“œ๋ฅผ ๋ถ„์„ํ•˜๊ธฐ ์œ„ํ•˜์—ฌ ๊ธฐ๊ธฐ์  ์ค‘์„ฑ์ž ๋ฐฉ์‚ฌํ™” ๋ถ„์„

(INAA)์„ ์ด์šฉํ•˜์˜€๋‹ค. ์•„๋ž˜์™€ ๊ฐ™์ด ์ค€๋น„ํ•œ ์‹œ๋ฃŒ๋ฅผ ํ•œ๊ตญ

์›์ž๋ ฅ์—ฐ๊ตฌ์›๋‚ด ํ•˜๋‚˜๋กœ์—์„œ ๊ณต์••์‹ ์ˆ˜์†ก์‹œ์Šคํ…œ์„ ์ด์šฉ

ํ•˜์—ฌ ์ค‘์„ฑ์ž ์กฐ์‚ฌ(2.95ร—1013n/cm2ยทsec ์ค‘์„ฑ์ž ์†์—์„œ 1

๋ถ„๊ฐ„)๋ฅผ ํ•˜์˜€๋‹ค. ๋ฐฉ์‚ฌ๋Šฅ๊ณ„์ธก ํ›„ ์ ˆ๋Œ€๋ฒ•(absolute method)

์œผ๋กœ ์ •๋Ÿ‰ํ•˜์˜€๋‹ค. ๋ชจ์˜ ์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ์‹œ๋ฃŒ๋กœ๋ถ€ํ„ฐ ๊ธฐ์ฒด

๋ฅผ ํฌ์ง‘ํ•œ ๊ฒฝ์šฐ ํฌ์ง‘๊ด€์„ ๋ถ€๋ถ„๋ณ„๋กœ ๋‚˜๋ˆ„์–ด ๊ฐ ๋ถ€๋ถ„์˜

ํก์ฐฉ์ฒด๋ฅผ ์ˆ˜์ง‘ํ•œ ๋‹ค์Œ ๋ฌด๊ฒŒ๋ฅผ ์ธก์ •ํ•˜์˜€๋‹ค. ๊ฐ ๋ถ€๋ถ„์—

๋Œ€ํ•œ ๊ท ์งˆ์‹œ๋ฃŒ๋ฅผ ๋งŒ๋“ค๊ธฐ ์œ„ํ•˜์—ฌ ์ˆ˜์ง‘ํ•œ ์‹œ๋ฃŒ๋ฅผ ํด๋ฆฌ์—

ํ…”๋ Œ ์šฉ๊ธฐ์— ๋‹ด์•„ wrist action shaker (Burrell)์„ ์ด์šฉํ•˜

์—ฌ ๋ถ„์‡„ ๋ฐ ํ˜ผํ•ฉํ•˜์˜€๋‹ค. ๊ท ์งˆ์‹œ๋ฃŒ ์ผ์ •๋Ÿ‰ ์ทจํ•˜์—ฌ ๋ฌด๊ฒŒ

๋ฅผ ์ธก์ •ํ•œ ํ›„ ์ œ์ž‘ํ•œ ํด๋ฆฌ์—ํ‹ธ๋ Œ ๋ฐ”์ด์•Œ(ํญ 16 mm, ๋†’

์ด 12 mm)์— ๋„ฃ๊ณ  ๋งˆ๊ฐœ๋ฅผ ํ•œ ๋‹ค์Œ ์ค‘์„ฑ์ž ์กฐ์‚ฌ๋ฅผ ํ•˜์˜€

๋‹ค. ์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ์‹œ๋ฃŒ๋กœ๋ถ€ํ„ฐ ๊ธฐ์ฒด๋ฅผ ํฌ์ง‘ํ•œ ๊ฒฝ์šฐ ๋ฐฉ

์‚ฌ์„ ์ž‘์—… ํŠน์„ฑ์ƒ ๋ฐฉ์‚ฌ์„ฑ ์š”์˜ค๋“œ๋ฅผ ํก์ฐฉํ•œ ํก์ฐฉ์ฒด์˜ ๋ถ„

์‡„๊ฐ€ ๋ถˆ๊ฐ€๋Šฅํ•˜๋ฏ€๋กœ ํฌ์ง‘๊ด€(4 cm)์„ glove box๋กœ ์˜ฎ๊ธด

๋‹ค์Œ ํฌ์ง‘๊ด€ ์œ—๋ถ€๋ถ„๋ถ€ํ„ฐ ํก์ฐฉ์ฒด๋ฅผ ๋ถ€๋ถ„์ ์œผ๋กœ ๋‚˜๋ˆ„์–ด

์†Œ๋ถ„ํ•˜์˜€๋‹ค. ์†Œ๋ถ„์‹œ๋ฃŒ ์ „๋Ÿ‰์„ ๋ฌด๊ฒŒ์ธก์ •ํ•˜๊ณ  ํด๋ฆฌ์—ํ‹ธ๋ Œ

๋ฐ”์ด์•Œ์— ๋‹ด์•„ ๋งˆ๊ฒŒ๋ฅผ ํ•œ ๋‹ค์Œ ์ค‘์„ฑ์ž ์กฐ์‚ฌ๋ฅผ ํ•˜์˜€๋‹ค.

2.6. ์ž”๋ฅ˜ ๋ฐ ์‘์ถ• ์šฉ์•ก ์ค‘ ์š”์˜ค๋“œ ๋ถ„๋ฆฌ

์‹œ๋ฃŒ๋ช… ์‹œ๋ฃŒ ์ด๋ ฅ

S-1 ์‹œํŒ Silicagel (Aldrich, 8 mesh)

S-2 S-1์— AgNO3๋ฅผ ์นจ์œค์‹œํ‚จ Silicagel(Ag-Silicagel ํก์ฐฉ์ฒด)

S-3S-2 ํก์ฐฉ์ฒด๋กœ ๋ชจ์˜ ์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ์‹œ๋ฃŒ๋กœ๋ถ€ํ„ฐ ํœ˜๋ฐœ

์š”์˜ค๋“œ๋ฅผ ํก์ฐฉ์‹œํ‚จ ํก์ฐฉ๊ด€ ์ค‘๊ฐ„ ๋ถ€๋ถ„(์ „๋ฐฉ 3 cm)

์‹œ๋ฃŒ

S-4S-2 ํก์ฐฉ์ฒด๋กœ ๋ชจ์˜ ์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ์‹œ๋ฃŒ๋กœ๋ถ€ํ„ฐ ํœ˜๋ฐœ

์š”์˜ค๋“œ๋ฅผ ํก์ฐฉ์‹œํ‚จ ํก์ฐฉ๊ด€ ์•ž๋ถ€๋ถ„(์ „๋ฐฉ 0.1-0.5

cm) ์‹œ๋ฃŒ

S-5S-2 ํก์ฐฉ์ฒด๋กœ ์‹ค์ œ ์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ์‹œ๋ฃŒ๋กœ๋ถ€ํ„ฐ ํœ˜๋ฐœ

์š”์˜ค๋“œ๋ฅผ ํก์ฐฉ์‹œํ‚จ ํก์ฐฉ๊ด€ ์ค‘๊ฐ„ ๋ถ€๋ถ„(์ „๋ฐฉ 1-3 cm)

์‹œ๋ฃŒ

S-6S-2 ํก์ฐฉ์ฒด๋กœ ์‹ค์ œ ์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ์‹œ๋ฃŒ๋กœ๋ถ€ํ„ฐ ํœ˜๋ฐœ

์š”์˜ค๋“œ๋ฅผ ํก์ฐฉ์‹œํ‚จ ํก์ฐฉ๊ด€ ์•ž๋ถ€๋ถ„(์ „๋ฐฉ 0.1-1 cm)

์‹œ๋ฃŒ

S-7S-2 ํก์ฐฉ์ฒด๋กœ ์‹ค์ œ ์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ์‹œ๋ฃŒ๋กœ๋ถ€ํ„ฐ ํœ˜๋ฐœ ์š”

์˜ค๋“œ๋ฅผ ํก์ฐฉ์‹œํ‚จ ํก์ฐฉ๊ด€ ๋งจ ์•ž๋ถ€๋ถ„ ์œ ๋ฆฌ์†œ ํ•„ํ„ฐ

์‹œ๋ฃŒ๋ช… ์‹œ๋ฃŒ ์ด๋ ฅ ์‹œ๋ฃŒ๋Ÿ‰

(g)

B-1 ์‹œํŒ Silicagel (Aldrich, 8 mesh) 0.329

B-2B-1์— AgNO3๋ฅผ ์นจ์œค์‹œํ‚จ Silicagel

(Ag-Silicagel ํก์ฐฉ์ฒด) 0.391

L-1

B-2 ํก์ฐฉ์ฒด๋กœ ๋ชจ์˜์‚ฌ์šฉํ›„ํ•ต์—ฐ๋ฃŒ์‹œ๋ฃŒ๋กœ๋ถ€

ํ„ฐ ํœ˜๋ฐœ์š”์˜ค๋“œ ํก์ฐฉ์‹œํ‚จ ํก์ฐฉ๊ด€ ๋งจ ์•ž๋ถ€

๋ถ„(์œ ๋ฆฌ์†œ ํ•„ํ„ฐ ๋ฐ ์ „๋ฐฉ 0.1-1 cm) ๋ถ„๋ง

์‹œ๋ฃŒ

0.334

L-2B-2 ํก์ฐฉ์ฒด๋กœ ๋ชจ์˜์‚ฌ์šฉํ›„ํ•ต์—ฐ๋ฃŒ์‹œ๋ฃŒ๋กœ๋ถ€

ํ„ฐ ํœ˜๋ฐœ์š”์˜ค๋“œ ํก์ฐฉ์‹œํ‚จ ํก์ฐฉ๊ด€ L-1 ๋‹ค

์Œ๋ถ€๋ถ„(์ „๋ฐฉ 1-3 cm) ๋ถ„๋ง์‹œ๋ฃŒ

0.388

L-3B-2 ํก์ฐฉ์ฒด๋กœ ๋ชจ์˜์‚ฌ์šฉํ›„ํ•ต์—ฐ๋ฃŒ์‹œ๋ฃŒ๋กœ๋ถ€ํ„ฐ

ํœ˜๋ฐœ์š”์˜ค๋“œ ํก์ฐฉ์‹œํ‚จ ํก์ฐฉ๊ด€ L-2 ๋‹ค์Œ๋ถ€

๋ถ„(์ „๋ฐฉ 3-7.5 cm) ๋ถ„๋ง์‹œ๋ฃŒ

0.454

L-4B-2 ํก์ฐฉ์ฒด๋กœ ๋ชจ์˜์‚ฌ์šฉํ›„ํ•ต์—ฐ๋ฃŒ์‹œ๋ฃŒ๋กœ๋ถ€ํ„ฐ

ํœ˜๋ฐœ์š”์˜ค๋“œ ํก์ฐฉ์‹œํ‚จ ํก์ฐฉ๊ด€ L-3 ๋‹ค์Œ๋ถ€

๋ถ„(์ „๋ฐฉ 7.5-12 cm) ๋ถ„๋ง์‹œ๋ฃŒ

0.430

N-1B-2 ํก์ฐฉ์ฒด๋กœ ์‹ค์ œ์‚ฌ์šฉํ›„ํ•ต์—ฐ๋ฃŒ์‹œ๋ฃŒ๋กœ๋ถ€

ํ„ฐ ํœ˜๋ฐœ์š”์˜ค๋“œ ํก์ฐฉ์‹œํ‚จ ํก์ฐฉ๊ด€ ๋งจ ํ›„๋ฏธ

๋ถ€๋ถ„ ์‹œ๋ฃŒ

1.245

N-2B-2 ํก์ฐฉ์ฒด๋กœ ์‹ค์ œ์‚ฌ์šฉํ›„ํ•ต์—ฐ๋ฃŒ์‹œ๋ฃŒ๋กœ๋ถ€

ํ„ฐ ํœ˜๋ฐœ์š”์˜ค๋“œ ํก์ฐฉ์‹œํ‚จ ํก์ฐฉ๊ด€ N-1 ์•ž

๋ถ€๋ถ„ ์‹œ๋ฃŒ

0.905

N-3B-2 ํก์ฐฉ์ฒด๋กœ ์‹ค์ œ์‚ฌ์šฉํ›„ํ•ต์—ฐ๋ฃŒ์‹œ๋ฃŒ๋กœ๋ถ€

ํ„ฐ ํœ˜๋ฐœ์š”์˜ค๋“œ ํก์ฐฉ์‹œํ‚จ ํก์ฐฉ๊ด€ N-2 ์•ž

๋ถ€๋ถ„ ์‹œ๋ฃŒ

0.625

N-4B-2 ํก์ฐฉ์ฒด๋กœ ์‹ค์ œ์‚ฌ์šฉํ›„ํ•ต์—ฐ๋ฃŒ์‹œ๋ฃŒ๋กœ๋ถ€

ํ„ฐ ํœ˜๋ฐœ์š”์˜ค๋“œ ํก์ฐฉ์‹œํ‚จ ํก์ฐฉ๊ด€ N-3 ์•ž

๋ถ€๋ถ„ ์‹œ๋ฃŒ

1.031

N-5B-2 ํก์ฐฉ์ฒด๋กœ ์‹ค์ œ์‚ฌ์šฉํ›„ํ•ต์—ฐ๋ฃŒ์‹œ๋ฃŒ๋กœ๋ถ€

ํ„ฐ ํœ˜๋ฐœ์š”์˜ค๋“œ ํก์ฐฉ์‹œํ‚จ ํก์ฐฉ๊ด€ ๋งจ ์•ž๋ถ€

๋ถ„ ์œ ๋ฆฌ์†œ ํ•„ํ„ฐ

0.079

Page 5: Determination of volatile and residual iodine during the ...

์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ ์šฉํ•ด ์ค‘ ํœ˜๋ฐœ ๋ฐ ์ž”๋ฅ˜ ์š”์˜ค๋“œ ๋ถ„์„ 399

Vol. 22, No. 5, 2009

๋ชจ์˜ ์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ์‹œ๋ฃŒ ์šฉํ•ด ํ›„ ์šฉ์•ก ์ค‘์— ์ž”๋ฅ˜

ํ•œ ์š”์˜ค๋“œ๋ฅผ ์ •๋Ÿ‰ํ•˜๊ธฐ ์œ„ํ•˜์—ฌ ์ฆ๋ฅ˜ ํ”Œ๋ผ์Šคํฌ๋‚ด์˜ ์šฉ

ํ•ด์šฉ์•ก์„ 50 mL ์šฉ์ ์˜ ๋ถ€ํ”ผ ํ”Œ๋ผ์Šคํฌ์— ์˜ฎ๊ธฐ๊ณ  ์ผ

์ •๋ถ€ํ”ผ๋กœ ๋งŒ๋“  ๋‹ค์Œ ์ผ์ •๋Ÿ‰(3 mL)์„ ์ทจํ•˜์—ฌ Fig. 2์˜

๊ณผ์ •์— ๋”ฐ๋ผ ์‚ฐํ™”์ˆ˜ ์กฐ์ ˆ ๋ฐ ์šฉ๋งค์ถ”์ถœ ๋ฐฉ๋ฒ•์œผ๋กœ ์šฉ์•ก

์ค‘์— ์ž”๋ฅ˜ํ•œ ์š”์˜ค๋“œ๋ฅผ ๋ถ„๋ฆฌํ•˜์˜€๋‹ค. ๋˜ํ•œ ๋ชจ์˜ ์‚ฌ์šฉ ํ›„

ํ•ต์—ฐ๋ฃŒ์‹œ๋ฃŒ ์šฉํ•ด ํ›„ ์ฆ๋ฅ˜์žฅ์น˜ ๋‚ด์— ์‘์ถ•๋œ ์š”์˜ค๋“œ๋ฅผ

ํšŒ์ˆ˜ํ•˜๊ธฐ ์œ„ํ•˜์—ฌ ์šฉํ•ด ํ›„ ์ฆ๋ฅ˜ ํ”Œ๋ผ์Šคํฌ๋‚ด์˜ ์šฉํ•ด์šฉ

์•ก์„ ์˜ฎ๊ธด ๋‹ค์Œ HNO3(1+1) ์šฉ์•ก์œผ๋กœ 90 oC์—์„œ 2 ์‹œ

๊ฐ„ ๋™์•ˆ ์žฌ์ฆ๋ฅ˜ํ•˜์˜€๋‹ค. ์žฌ์ฆ๋ฅ˜ํ•œ ์šฉ์•ก์„ 25 mL ์šฉ์ 

์˜ ๋ถ€ํ”ผ ํ”Œ๋ผ์Šคํฌ์— ์˜ฎ๊ธฐ๊ณ  ์ผ์ •๋ถ€ํ”ผ๋กœ ๋งŒ๋“  ๋‹ค์Œ ์ผ

์ •๋Ÿ‰(6 mL)์„ ์ทจํ•˜์—ฌ ์šฉํ•ด์šฉ์•ก์˜ ๊ฒฝ์šฐ์™€ ๊ฐ™์€ ๋ฐฉ๋ฒ•์œผ

๋กœ Fig. 2์˜ ๊ณผ์ •์— ๋”ฐ๋ผ ๋ถ„๋ฆฌํ•˜์—ฌ ์‘์ถ•์šฉ์•ก ์ค‘์˜ ์š”

์˜ค๋“œ๋ฅผ ํšŒ์ˆ˜ํ•˜์˜€๋‹ค. ์œ ๊ธฐ์ธต์œผ๋กœ ํšŒ์ˆ˜ํ•œ ์ถ”์ถœ์šฉ์•ก์„ ์žฌ

์ฐจ ์—ญ์ถ”์ถœํ•˜์—ฌ ์š”์˜ค๋“œ๋ฅผ ํšŒ์ˆ˜ํ•˜๊ณ  ์ผ์ •๋ถ€ํ”ผ๋กœ ๋งŒ๋“ 

๋‹ค์Œ ์ผ์ •๋Ÿ‰์„ ์ทจํ•˜์—ฌ Fig. 3๊ณผ ๊ฐ™์ด ์ œ์ž‘ํ•œ ์ด์˜จ๊ตํ™˜

๋ถ„๋ฆฌ๊ด€์˜ ์ˆ˜์ง€์— ํก์ฐฉ์‹œ์ผœ ์š”์˜ค๋“œ๋งŒ์„ ์ˆœ์ˆ˜ํ•˜๊ฒŒ ํšŒ์ˆ˜

ํ•˜์˜€๋‹ค. ํ™”ํ•™์  ํšŒ์ˆ˜์œจ์ธก์ •์„ ์œ„ํ•˜์—ฌ ๋ชจ์˜ ์‚ฌ์šฉ ํ›„ ํ•ต

์—ฐ๋ฃŒ์‹œ๋ฃŒ ๋Œ€์‹  CsI๋กœ ๋งŒ๋“  ํ‘œ์ค€์šฉ์•ก ์ผ์ •๋Ÿ‰์„ ๋™์ผํ•œ

๊ณผ์ •์œผ๋กœ ์š”์˜ค๋“œ๋ฅผ ์ถ”์ถœ๋ถ„๋ฆฌ ๋ฐ ์ด์˜จ๊ตํ™˜์ˆ˜์ง€์— ํก์ฐฉ

์‹œ์ผœ ์ค€๋น„ํ•˜์˜€๋‹ค. ๋˜ํ•œ ์นจ์ „๋ฒ•์— ์˜ํ•œ ์š”์˜ค๋“œ ํšŒ์ˆ˜์œจ

์ธก์ •์„ ์œ„ํ•˜์—ฌ HIO3๋กœ ์ œ์กฐํ•œ ํ‘œ์ค€์šฉ์•ก ์ผ์ •๋Ÿ‰์„ ๋™

์ผํ•œ ๊ณผ์ •์œผ๋กœ ์š”์˜ค๋“œ๋ฅผ ์ถ”์ถœ๋ถ„๋ฆฌํ•œ ํ›„ ์ถ”์ถœ์šฉ์•ก ์ผ

์ •๋Ÿ‰์— 0.1 M AgNO3 ์šฉ์•ก์„ ๊ฐ€ํ•˜์—ฌ AgI๋กœ ์นจ์ „์‹œ์ผฐ

๋‹ค. ์ด์˜จ๊ตํ™˜๋ถ„๋ฆฌ๊ด€๊ณผ ๋น„์Šทํ•œ ํฌ๊ธฐ๋กœ ํด๋ฆฌ์—ํ‹ธ๋ Œ ๊ด€์œผ

๋กœ ์—ฌ๊ณผํ‚คํŠธ๋ฅผ ๋งŒ๋“ค๊ณ  ์ด์˜จ๊ตํ™˜์ˆ˜์ง€ ๋Œ€์‹  ํ•˜๋ถ€์— ์—ฌ

๊ณผ์ง€(Whatmann 44)๋ฅผ ๋ผ์›Œ์„œ ์š”์˜ค๋“œ ์นจ์ „๋ฌผ(AgI)์„

์—ฌ๊ณผ ๋ฐ ํšŒ์ˆ˜ํ•˜์˜€๋‹ค. ์‹ค์ œ ์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ์‹œ๋ฃŒ์˜ ์šฉํ•ด

๋กœ๋ถ€ํ„ฐ ์ˆ˜์ง‘ํ•œ ์šฉํ•ด์šฉ์•ก ๋ฐ ์‘์ถ•์šฉ์•ก ์ค‘์˜ ์š”์˜ค๋“œ์ •

๋Ÿ‰์€ ์›๊ฒฉ์ž‘์—…์˜ ํŠน์„ฑ์ƒ ์ •๊ตํ•œ ์ž‘์—…์ด ์–ด๋ ค์šฐ๋ฏ€๋กœ

๋ณธ ์—ฐ๊ตฌ์˜ ์ œ์ž‘์žฅ์น˜๋ฅผ ์ด์šฉํ•œ ์ด์˜จ๊ตํ™˜ ๋ฐ ์นจ์ „๋ถ„๋ฆฌ

๋Š” ์ƒ๋žตํ•˜์˜€๋‹ค.

2.7. ์ž”๋ฅ˜ ๋ฐ ์‘์ถ• ์šฉ์•ก ์ค‘ ์š”์˜ค๋“œ ๋ถ„์„

ํด๋ฆฌ์—ํ‹ธ๋ Œ ๋ถ„๋ฆฌ๊ด€ ๋ฐ ์—ฌ๊ณผํ‚คํŠธ๋ฅผ ์ด์šฉํ•˜์—ฌ ์‹œ๋ฃŒ

Fig. 2. Iodine separation for NAA.

Fig. 3. Modified ion exchange column as irradiation insert. : Glass pipet, : Polyethylene column, : Glass

wool, :Sample introduction, : Anion exchangeresin, :Polyethylene column jacket.

Page 6: Determination of volatile and residual iodine during the ...

400 ๊น€์ •์„ยท๋ฐ•์ˆœ๋‹ฌยท์ „์˜์‹ ยทํ•˜์˜๊ฒฝยท์†ก๊ทœ์„

Analytical Science & Technology

๋ฐ ํ‘œ์ค€๋ฌผ ์ค‘์˜ ์š”์˜ค๋“œ์— ๋Œ€ํ•œ ์ด์˜จ๊ตํ™˜ํก์ฐฉ ๋ฐ ์นจ์ „

๋ถ„๋ฆฌ๋ฅผ ์™„๋ฃŒํ•˜๋ฉด ๋ถ„๋ฆฌ๊ด€ ๋ฐ ์—ฌ๊ณผํ‚คํŠธ ๋‚ด์˜ ์ด์˜จ๊ตํ™˜

์ˆ˜์ง€ ๋ฐ ์—ฌ๊ณผ์ง€๋ฅผ ์™„์ „ํžˆ ๊ฑด์กฐ์‹œ์ผฐ๋‹ค. ๊ตฌ๋ฉ์ด ์—†๋Š” ํด

๋ฆฌ์—ํ‹ธ๋ Œ ๋งˆ๊ฐœ๋กœ ํด๋ฆฌ์—ํ‹ธ๋ Œ ๋ถ„๋ฆฌ๊ด€ ๋ฐ ์—ฌ๊ณผํ‚คํŠธ ์œ„

์•„๋ž˜๋ฅผ ๋ง‰๊ณ  ๋ฐ€ํ์ƒํƒœ๋กœ ์กฐ๋ฆฝํ•œ ๋‹ค์Œ ์ค‘์„ฑ์ž ์กฐ์‚ฌ๋ฅผ

์œ„ํ•œ ์‚ฝ์ž…์ฒด(insert)๋กœ ์ด์šฉํ•˜์˜€๋‹ค. ํ‘œ์ค€์šฉ์•ก(127I)์œผ๋กœ

๋งŒ๋“  ํ‘œ์ค€์‹œ๋ฃŒ์™€ ํ•จ๊ป˜ ์ค€๋น„ํ•œ ์‹œ๋ฃŒ๋ฅผ ํ•œ๊ตญ์›์ž๋ ฅ์—ฐ๊ตฌ

์›๋‚ด์˜ ํ•˜๋‚˜๋กœ์—์„œ ๊ณต์••์‹ ์ˆ˜์†ก์‹œ์Šคํ…œ์„ ์ด์šฉํ•˜์—ฌ ์ค‘

์„ฑ์ž์กฐ์‚ฌ(2.95ร—1013n/cm2ยทsec ์ค‘์„ฑ์ž ์†์—์„œ ์ด์˜จ๊ตํ™˜

์ˆ˜์ง€์˜ ๊ฒฝ์šฐ 1 ์ดˆ๊ฐ„, AgI ์นจ์ „๋ฌผ์˜ ๊ฒฝ์šฐ 1 ๋ถ„๊ฐ„)ํ•˜์˜€

๋‹ค. ๋ฐฉ์‚ฌ๋Šฅ๊ณ„์ธก ํ›„ ์ •๋Ÿ‰์€ ๋น„๊ต๋ฒ•์œผ๋กœ ํ•˜์˜€๋‹ค.

3. ๊ฒฐ๊ณผ ๋ฐ ๊ณ ์ฐฐ

3.1. ํ•ต์—ฐ๋ฃŒ์‹œ๋ฃŒ ์šฉํ•ด ๋ฐ ํœ˜๋ฐœ๊ธฐ์ฒด ํฌ์ง‘

Fig. 1์€ ๋ณธ ์—ฐ๊ตฌ์—์„œ ์ด์šฉํ•œ ํ•ต์—ฐ๋ฃŒ์šฉํ•ด ๋ฐ ํœ˜๋ฐœ๊ธฐ

์ฒด ํฌ์ง‘์žฅ์น˜์ด๋‹ค. Ag-silica gel ํก์ฐฉ์ฒด๋ฅผ ํฌํ•จํ•˜๋Š” ์š”

์˜ค๋“œ ํฌ์ง‘๊ด€์— ์ด์–ด ์„ค์น˜ํ•œ 1.5 M NaOH ์šฉ์•ก์„ ํฌ

ํ•จํ•˜๋Š” ํฌ์ง‘์žฅ์น˜๋Š” ์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ ์šฉํ•ด์‹œ ๋ฐœ์ƒํ•˜๋Š”

NOx ๊ธฐ์ฒด ๋ฐ ์š”์˜ค๋“œ์™€ ํ•จ๊ป˜ ํœ˜๋ฐœ๋˜๋Š” 14C(CO2)๋ฅผ ํฌ

์ง‘ํ•˜๊ธฐ ์œ„ํ•จ์ด๋‹ค. ํฐ ์ž…์ž์˜ silica gel๋กœ ํก์ฐฉ์ฒด๋ฅผ ์ œ

์กฐํ•˜์˜€์œผ๋ฏ€๋กœ ๋ƒ‰๊ฐ๊ด€์— ์š”์˜ค๋“œ ํฌ์ง‘๊ด€์„ ์—ฐ๊ฒฐํ•˜๊ณ  ํœ˜

๋ฐœ๋œ 14C(CO2)๋ฅผ 1.5 M NaOH ์šฉ์•ก ํฌ์ง‘์žฅ์น˜๋กœ ํฌ์ง‘

ํ•˜์˜€์„ ๋•Œ ํฌ์ง‘๊ด€ ์—ฐ๊ฒฐ์— ๋”ฐ๋ฅธ ๊ธฐ์ฒด ํ๋ฆ„์˜ ๋ฐฉํ•ด๋Š”

์—†์—ˆ๋‹ค. ๋ณธ ์—ฐ๊ตฌ์—์„œ์˜ Ag-silica gel ํก์ฐฉ์ฒด๊ฐ€ ํœ˜๋ฐœ๋œ

์š”์˜ค๋“œ๋ฅผ ์™„์ „ํžˆ ํก์ฐฉ์‹œํ‚ค์ง€ ๋ชปํ•  ๊ฒฝ์šฐ ์ž”์—ฌ ์š”์˜ค๋“œ

๊ฐ€ 1.5 M NaOH ์šฉ์•ก์— ํก์ฐฉํ•˜๊ฒŒ ๋˜๋ฏ€๋กœ ํœ˜๋ฐœ๋œ ์š”์˜ค

๋“œ์˜ ์ •๋Ÿ‰์€ ์–ด๋ ค์›Œ ์ง„๋‹ค. ๋˜ํ•œ ํœ˜๋ฐœ๋œ ์š”์˜ค๋“œ ์ •๋Ÿ‰๊ณผ

ํ•จ๊ป˜ ํœ˜๋ฐœ๋œ 14C(CO2)๋ฅผ ์ถ”๊ฐ€๋กœ ์ •๋Ÿ‰ํ•˜๊ณ ์ž ํ•  ๊ฒฝ์šฐ

NaOH ์šฉ์•ก์— ํฌ์ง‘๋œ 14C(CO2)๋ฅผ ์•ก์ฒด์„ฌ๊ด‘๊ณ„์ˆ˜๊ธฐ๋กœ ์ธก

์ •ํ•  ๋•Œ ๋ฐฉ์‚ฌ์„ฑ์˜ 129I๊ฐ€ ๊ฐ„์„ญํ•˜๊ฒŒ ๋œ๋‹ค. ์ฆ‰, ๋ฐฉ์‚ฌ์„ฑ 129I

์™€ 14C ๋ชจ๋‘ ฮฒ-emitter์ด๋ฏ€๋กœ 14C์˜ ์ •๋Ÿ‰์€ ๋ถˆ๊ฐ€๋Šฅํ•ด์ง„

๋‹ค. NaOH ํฌ์ง‘์šฉ์•ก ์ค‘์— ์š”์˜ค๋“œ์˜ ์ž”์กด ์—ฌ๋ถ€๋ฅผ ํ™•์ธ

ํ•˜๊ธฐ ์œ„ํ•˜์—ฌ NaOH ์šฉ์•ก ์ผ์ •๋Ÿ‰์„ ์—ฌ๊ณผ์ง€์— ํก์ฐฉ์‹œ์ผœ

์ค‘์„ฑ์ž ๋ฐฉ์‚ฌํ™” ๋ถ„์„์„ ์‹œ๋„ํ•ด ๋ณด์•˜์œผ๋‚˜ Na-24์˜ ๊ฐ„์„ญ

์ด ๋งค์šฐ ๊ฐ•ํ•˜์—ฌ ๋ถ„์„์ด ๋ถˆ๊ฐ€๋Šฅํ•˜์˜€๋‹ค. ๊ทธ๋Ÿฌ๋‚˜ ํ•ต์—ฐ๋ฃŒ์šฉ

ํ•ด ์ „ ์š”์˜ค๋“œ ํฌ์ง‘๊ด€์˜ Ag-silica gel ํก์ฐฉ์ฒด๋Š” ๋ณด๋ผ์ƒ‰

์„ ๋ ๋‚˜, ํœ˜๋ฐœ๊ธฐ์ฒด ํฌ์ง‘์ด ์™„๋ฃŒ๋œ ์šฉํ•ด ํ›„์—๋Š” ํฌ์ง‘๊ด€

์•ž๋ถ€๋ถ„์˜ ์œ ๋ฆฌ์†œ ํ•„ํ„ฐ์™€ ํก์ฐฉ์ฒด๊ฐ€ ๋…ธ๋ž€์ƒ‰์„ ๋ ๋ฏ€๋กœ์„œ

์š”์˜ค๋“œ ํก์ฐฉ์„ ์ •์„ฑ์ ์œผ๋กœ ๋ณด์—ฌ ์ฃผ์—ˆ๋‹ค. ํก์ฐฉ์ฒด์˜ ์•ž๋ถ€

๋ถ„ ์ด์™ธ์˜ ๋‹ค๋ฅธ ๋ถ€๋ถ„์€ ์—ฐํ•œ ๋ณด๋ผ์ƒ‰์œผ๋กœ ๋ณ€ํ•˜์˜€์œผ๋ฉฐ

์ „๋ฐ˜์ ์œผ๋กœ ํ™œ์„ฑํ™”๋œ ๊ฒƒ์„ ๋ณด์—ฌ ์ฃผ์—ˆ๋‹ค. ์ ์™ธ์„ ๋“ฑ์„ ์ด

์šฉํ•˜์—ฌ ํก์ฐฉ๊ด€์„ 50 oC๋กœ ๊ฐ€์—ด ์œ ์ง€ํ•˜๋ฉด์„œ ํœ˜๋ฐœ๊ธฐ์ฒด๋ฅผ

ํฌ์ง‘ํ•ด ๋ณด์•˜์œผ๋‚˜ ํก์ฐฉ์ฒด์˜ ๋…ธ๋ž€์ƒ‰ ๋ ์˜ ๋ณ€ํ™”, ์ฆ‰, ์˜จ๋„

์ƒ์Šน์— ๋”ฐ๋ฅธ ์š”์˜ค๋“œ ํก์ฐฉ์˜ ์ƒ์Šนํšจ๊ณผ๋Š” ๋ฐœ๊ฒฌ๋˜์ง€ ์•Š์•˜

๋‹ค. ๋”ฐ๋ผ์„œ hot cell ๋‚ด์— ์„ค์น˜ํ•œ ์š”์˜ค๋“œ ํฌ์ง‘๊ด€์˜ ๊ธธ์ด

๋„ ์ถ•์†Œํ•˜์—ฌ ์ œ์ž‘ ์„ค์น˜ํ•˜์˜€๋‹ค(๋‚ด๊ฒฝ 1 cm, ๊ธธ์ด 4 cm).

๋˜ํ•œ, ๊ธฐ์ดˆ์‹คํ—˜ ๊ฒฐ๊ณผ, 1.5 M NaOH ์šฉ์•ก์„ ํฌํ•จํ•˜๋Š” 3

๋‹จ๊ณ„์˜ 14C(CO2) ํฌ์ง‘์žฅ์น˜ ์ค‘ ์ฒซ ๋ฒˆ์งธ ํฌ์ง‘๊ด€์—์„œ14C(CO2)๊ฐ€ ์ „๋Ÿ‰ ํฌ์ง‘๋˜๋Š” ๊ฒƒ์ด ํ™•์ธ๋˜์—ˆ์œผ๋ฏ€๋กœ 2 ๋‹จ๊ณ„

๋กœ ์ถ•์†Œํ•˜์˜€์œผ๋ฉฐ, hot cell ๋‚ด์— ์„ค์น˜ํ•œ ํ•ต์—ฐ๋ฃŒ์šฉํ•ด์žฅ์น˜

์˜ ํฌ์ง‘์žฅ์น˜์˜ ๊ฒฝ์šฐ๋„ .1.5 M NaOH ํฌ์ง‘์šฉ์•ก์˜ ๋ถ€ํ”ผ

๋ฅผ ๋ฐ˜์œผ๋กœ(25 mL --> 12.5 mL) ์ค„์˜€๋‹ค.

3.2. ํœ˜๋ฐœ์š”์˜ค๋“œ ํก์ฐฉํŠน์„ฑ ๋ถ„์„

๋ชจ์˜ ์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ ์ œ์กฐ์‹œ ์š”์˜ค๋“œ๋ฅผ ์ง์ ‘ ์ฒจ๊ฐ€ํ•˜

๋ฉด ๊ณ ์˜จ์ฒ˜๋ฆฌ ์ค‘์— ํœ˜๋ฐœํ•˜๋ฏ€๋กœ ๋ณธ ์—ฐ๊ตฌ์—์„œ๋Š” ์š”์˜ค๋“œ

์—†์ด ์ œ์กฐํ•œ ๋ชจ์˜ ์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ ์ผ์ •๋Ÿ‰์„ ์ทจํ•˜์—ฌ

์šฉํ•ด์šฉ๊ธฐ์— ๋„ฃ๊ณ  CsI 0.0225 g์„ ์ถ”๊ฐ€๋กœ ๊ฐ€ํ•œ ๋‹ค์Œ ์šฉ

ํ•ด์— ์ด์šฉํ•˜์˜€๋‹ค. ์ด ์ฒจ๊ฐ€๋Ÿ‰์€ ์›์ž๋กœ์—์„œ 35,000

MWD/MTU๋กœ ์—ฐ์†Œ๋œ PWR ์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ 50 g ์ค‘

์— ํ•จ์œ ๋œ ์š”์˜ค๋“œ์˜ ์–‘์— ํ•ด๋‹นํ•œ๋‹ค. ์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ๋‚ด

์—์„œ ์ฃผ์š” ํ•ต๋ถ„์—ด์ƒ์„ฑ๋ฌผ์ธ Cs์€ UO2์— ๋Œ€ํ•œ ์šฉํ•ด๋„

๊ฐ€ ๋‚ฎ์•„ ํ•ต์—ฐ๋ฃŒ๋ด‰๋‚ด์˜ ๋นˆ๊ณต๊ฐ„(gap)์—์„œ ์š”์˜ค๋“œ์™€ ๋ฐ˜์‘

ํ•˜์—ฌ ์ฃผ๋กœ CsI๋ฅผ ํ˜•์„ฑํ•˜๋ฏ€๋กœ ๋ณธ ์‹คํ—˜์—์„œ๋„ ๋น„์Šทํ•œ

๊ฑฐ๋™์„ ๋ชจ์‚ฌํ•˜๊ธฐ ์œ„ํ•˜์—ฌ CsI๋ฅผ ์ด์šฉํ•˜์˜€๋‹ค. Ag-Silica

gel ํก์ฐฉ์ฒด๋ฅผ ๋‹ด์€ ์š”์˜ค๋“œ ํฌ์ง‘๊ด€์„ ์ฆ๋ฅ˜์žฅ์น˜์— ๋ถ€์ฐฉ

ํ•˜๊ณ  90 oC๋กœ 4 ์‹œ๊ฐ„ ์šฉํ•ดํ•˜์˜€์„ ๋•Œ ์š”์˜ค๋“œ ํฌ์ง‘๊ด€์˜

ํก์ฐฉ์ฒด ์•ž๋ถ€๋ถ„์ด ๋…ธ๋ž—๊ฒŒ ์ฐฉ์ƒ‰๋œ ๊ฒƒ์„ ํ™•์ธํ•  ์ˆ˜ ์žˆ์—ˆ

๋‹ค. ๋˜ํ•œ ๋ชจ์˜ ์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ์— ์ฒจ๊ฐ€๋œ CsI์˜ ์–‘์ด

์‹œ๋ฃŒ๋ช… ์‹œ๋ฃŒ ์ด๋ ฅ ๋น„ ๊ณ 

S-1 ํ‘œ์ค€์šฉ์•ก(I)์„ ์ด์˜จ๊ตํ™˜์ˆ˜์ง€์— ํก์ฐฉ 976.9 ยตg-I

S-2 ํ‘œ์ค€์šฉ์•ก(II)์„ ์ด์˜จ๊ตํ™˜์ˆ˜์ง€์— ํก์ฐฉ 97.7 ยตg-I

S-3ํ‘œ์ค€์šฉ์•ก(III)์„ ์ด์˜จ๊ตํ™˜์ˆ˜์ง€์—

ํก์ฐฉ 9.8 ยตg-I

Y-1 ํ‘œ์ค€์šฉ์•ก(I)์„ ์ถ”์ถœ๋ถ„๋ฆฌ ํ›„ ์ด์˜จ๊ต

ํ™˜์ˆ˜์ง€์— ํก์ฐฉ ๋ถ„๋ฆฌ ํšŒ์ˆ˜์œจ

Y-2 ํ‘œ์ค€์šฉ์•ก(I)์„ ์ถ”์ถœ๋ถ„๋ฆฌ ํ›„ ์ด์˜จ๊ต

ํ™˜์ˆ˜์ง€์— ํก์ฐฉ ๋ถ„๋ฆฌ ํšŒ์ˆ˜์œจ

C-1 ์‘์ถ•๋œ ์š”์˜ค๋“œ๋ฅผ ์ถ”์ถœ๋ถ„๋ฆฌ ํ›„ ์ด์˜จ

๊ตํ™˜์ˆ˜์ง€์— ํก์ฐฉ ์‘์ถ•๋œ ์š”์˜ค๋“œ๋Ÿ‰

C-2 ์‘์ถ•๋œ ์š”์˜ค๋“œ๋ฅผ ์ถ”์ถœ๋ถ„๋ฆฌ ํ›„ ์ด์˜จ

๊ตํ™˜์ˆ˜์ง€์— ํก์ฐฉ ์‘์ถ•๋œ ์š”์˜ค๋“œ๋Ÿ‰

D-1 ์ž”๋ฅ˜๋œ ์š”์˜ค๋“œ๋ฅผ ์ถ”์ถœ๋ถ„๋ฆฌ ํ›„ ์ด์˜จ

๊ตํ™˜์ˆ˜์ง€์— ํก์ฐฉ ์ž”๋ฅ˜๋œ ์š”์˜ค๋“œ๋Ÿ‰

D-2 ์ž”๋ฅ˜๋œ ์š”์˜ค๋“œ๋ฅผ ์ถ”์ถœ๋ถ„๋ฆฌ ํ›„ ์ด์˜จ

๊ตํ™˜์ˆ˜์ง€์— ํก์ฐฉ ์ž”๋ฅ˜๋œ ์š”์˜ค๋“œ๋Ÿ‰

RS-1 ํ‘œ์ค€์šฉ์•ก(IV)์„ ์—ฌ๊ณผ์ง€์— ํก์ฐฉ 50 ยตg

RS-2 ํ‘œ์ค€์šฉ์•ก(V)์„ ์—ฌ๊ณผ์ง€์— ํก์ฐฉ 2.0 ยตg

RY-1 ํ‘œ์ค€์šฉ์•ก(IV) ์ผ์ •๋Ÿ‰์„ ์ถ”์ถœ ๋ฐ ์นจ

์ „๋ถ„๋ฆฌ ํ›„ ์—ฌ๊ณผ์ง€์— ํก์ฐฉ ๋ถ„๋ฆฌ ํšŒ์ˆ˜์œจ

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์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ ์šฉํ•ด ์ค‘ ํœ˜๋ฐœ ๋ฐ ์ž”๋ฅ˜ ์š”์˜ค๋“œ ๋ถ„์„ 401

Vol. 22, No. 5, 2009

๋งŽ์•„์งˆ ์ˆ˜๋ก ํฌ์ง‘๋˜๋Š” ์š”์˜ค๋“œ๊ฐ€ ๋งŽ์•„์ง€๋ฏ€๋กœ ํฌ์ง‘๊ด€

์•ž๋ถ€๋ถ„์— ๋‚˜ํƒ€๋‚˜๋Š” ๋…ธ๋ž€๋ ์˜ ๊ธธ์ด๋Š” ์กฐ๊ธˆ์”ฉ ๊ธธ์–ด์กŒ๋‹ค.

๋ณธ ์—ฐ๊ตฌ์—์„œ๋Š” ๋น„๋ฐฉ์‚ฌ์„ฑ๊ตฌ์—ญ์˜ ํ›„๋“œ ๋ฐ ๋ฐฉ์‚ฌ์„ฑ๊ตฌ์—ญ

์˜ hot cell ์•ˆ์— ๋ณ„๋„ ์„ค์น˜๋œ ์žฅ์น˜๋ฅผ ์ด์šฉํ•˜์—ฌ ๊ฐ๊ฐ

๋ชจ์˜ ์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ ๋ฐ ์‹ค์ œ ์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ ์‹œ๋ฃŒ๋ฅผ

์šฉํ•ดํ•˜๋ฉด์„œ ํœ˜๋ฐœ๋œ ์š”์˜ค๋“œ๋ฅผ Ag-silica gel ํก์ฐฉ์ฒด๋กœ

ํฌ์ง‘ํ•˜์˜€๋‹ค. ํฌ์ง‘๊ด€์„ ์šฉํ•ด์žฅ์น˜๋กœ๋ถ€ํ„ฐ ๋ถ„๋ฆฌํ•œ ํ›„ ํฌ์ง‘

๊ด€์„ ๋ถ€์œ„๋ณ„๋กœ ๋‚˜๋ˆˆ ๋‹ค์Œ ๊ฐ ๋ถ€์œ„์˜ ํก์ฐฉ์ฒด์‹œ๋ฃŒ๋ฅผ ์ฑ„

์ทจํ•˜์˜€๋‹ค. ํก์ฐฉ์ฒด ์ œ์กฐ์— ์ด์šฉํ•œ ์‹œํŒ ์‹ค๋ฆฌ์นด๊ฒ” ๋ฐ

AgNO3๋ฅผ ์นจ์œค์‹œ์ผœ ๋งŒ๋“  ํฌ์ง‘ ์ „์˜ Ag-silica gel ํก์ฐฉ

์ฒด์™€ ํ•จ๊ป˜ EPMA ๋ถ„์„์„ ํ•˜์˜€๋‹ค. ๋จผ์ € ์‹œํŒ ์‹ค๋ฆฌ์นด๊ฒ”

(S-1)์— ๋Œ€ํ•œ EDS ๋ถ„์„๊ฒฐ๊ณผ, ์‹ค๋ฆฌ์นด๊ฒ”์˜ ์ฃผ์š” ์„ฑ๋ถ„์ธ

Si์˜ ํ”ผ์ดํฌ๋ฅผ ํ™•์ธํ•  ์ˆ˜ ์žˆ์—ˆ๋‹ค[Fig. 4(A)]. Ag-silica

gel ํก์ฐฉ์ฒด(S-2)์— ๋Œ€ํ•œ EDS ๋ถ„์„๊ฒฐ๊ณผ, Ag๊ฐ€ ์‹ค๋ฆฌ์นด

๊ฒ” ํ‘œ๋ฉด์— ์ฒจ์ฐฉ๋œ ๊ฒƒ์„ ํ™•์ธํ•  ์ˆ˜ ์žˆ์—ˆ๋‹ค[Fig. 4(B)].

Fig. 5(A)๋Š” Ag-silica gel ํก์ฐฉ์ฒด๋ฅผ ์ด์šฉํ•˜์—ฌ ๋ชจ์˜ ์‚ฌ

์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ์‹œ๋ฃŒ๋กœ๋ถ€ํ„ฐ ํœ˜๋ฐœ๋œ ์š”์˜ค๋“œ๋ฅผ ํก์ฐฉ์‹œํ‚จ

ํฌ์ง‘๊ด€ ์ค‘๊ฐ„๋ถ€๋ถ„์˜ ํก์ฐฉ์ฒด(S-3)์— ๋Œ€ํ•œ EDS ๋ถ„์„๊ฒฐ๊ณผ

์ด๋‹ค. ์ด ์ŠคํŽ™ํŠธ๋Ÿผ์€ S-2์˜ ์ŠคํŽ™ํŠธ๋Ÿผ[Fig. 4(B)]๊ณผ ๋น„

์Šทํ•˜๋ฉฐ ์š”์˜ค๋“œ๊ฐ€ ๊ฑฐ์˜ ํก์ฐฉ๋˜์ง€ ์•Š์•˜์Œ์„ ๋ณด์—ฌ์ค€๋‹ค.

Fig. 5(B)๋Š” Ag-silica gel ํก์ฐฉ์ฒด๋ฅผ ์ด์šฉํ•˜์—ฌ ๋ชจ์˜ ์‚ฌ

์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ์‹œ๋ฃŒ๋กœ๋ถ€ํ„ฐ ํœ˜๋ฐœ๋œ ์š”์˜ค๋“œ๋ฅผ ํก์ฐฉ์‹œํ‚จ

ํฌ์ง‘๊ด€ ์•ž๋ถ€๋ถ„์˜ ํก์ฐฉ์ฒด(S-4)์— ๋Œ€ํ•œ EDS ๋ถ„์„๊ฒฐ๊ณผ์ด

๋‹ค. ์ด ๊ฒฐ๊ณผ๋Š” S-3 ๋ถ„์„๊ฒฐ๊ณผ[Fig. 5(A)]์™€ ๋‹ฌ๋ฆฌ ์š”์˜ค๋“œ

๊ฐ€ ์ƒ๋‹น๋Ÿ‰ ํก์ฐฉ๋˜์—ˆ์Œ์„ ๋ณด์—ฌ์ค€๋‹ค. Fig. 6(A)๋Š” ์‹ค์ œ

์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ์‹œ๋ฃŒ๋กœ๋ถ€ํ„ฐ ํœ˜๋ฐœ๋œ ์š”์˜ค๋“œ๋ฅผ ํก์ฐฉ์‹œํ‚จ

ํฌ์ง‘๊ด€ ์ค‘๊ฐ„๋ถ€๋ถ„์˜ ํก์ฐฉ์ฒด(S-5)์— ๋Œ€ํ•œ EDS ๋ถ„์„๊ฒฐ๊ณผ

์ด๋‹ค. ๋ชจ์˜ ์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ์‹œ๋ฃŒ์— ๋Œ€ํ•œ ๋ถ„์„๊ฒฐ๊ณผ[Fig.

Fig. 4. X-ray spectrum for Ag-Silicagel absorbent after Ag impregrated. A : Silicagel (S-1), B : Ag-Silicagel absorbent

Fig. 5. X-ray spectrum for Ag-silicagel absorbent after dissolution with simulated spent nuclear fuel. A : middle portion ofabsorbent (S-3), B : front portion of absorbent (S-4)

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402 ๊น€์ •์„ยท๋ฐ•์ˆœ๋‹ฌยท์ „์˜์‹ ยทํ•˜์˜๊ฒฝยท์†ก๊ทœ์„

Analytical Science & Technology

5(A)]์™€ ๋น„์Šทํ•œ ์ŠคํŽ™ํŠธ๋Ÿผ์„ ๋ณด์ด๋ฉฐ ์š”์˜ค๋“œ๊ฐ€ ๊ฑฐ์˜ ํก์ฐฉ

๋˜์ง€ ์•Š์•˜์Œ์„ ๋ณด์—ฌ์ฃผ๊ณ  ์žˆ์œผ๋‚˜, Mo์œผ๋กœ ์ถ”์ •๋˜๋Š” ์›

์†Œ๊ฐ€ ์ถ”๊ฐ€๋กœ ํก์ฐฉ๋œ ๊ฒƒ์œผ๋กœ ๋‚˜ํƒ€๋‚ฌ๋‹ค. ์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ

์ค‘์— ํ•จ์œ ๋œ ํ•ต๋ถ„์—ด์ƒ์„ฑ๋ฌผ Mo์€ ๊ธˆ์†์ƒ์˜ ๋‚ดํฌํ™”ํ•ฉ๋ฌผ

(inclusion) ์™ธ์— ์ผ๋ถ€ perovskite ์ƒ์ธ (Ba,Sr)MoO3์˜

์‚ฐํ™”์นจ์ „๋ฌผ ์ƒํƒœ๋กœ ์กด์žฌํ•˜๋Š” ๊ฒƒ์œผ๋กœ ์•Œ๋ ค์กŒ๋‹ค.24 ๋˜ํ•œ

์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ์˜ ์งˆ์‚ฐ์šฉํ•ด ์ค‘์—๋Š” ๊ธˆ์†์ƒ์€ ์žฌ์นจ์ „๋ฌผ

ํ˜•ํƒœ๋กœ ๋ถˆ์šฉ์„ฑ์ž”์œ ๋ฌผ์„ ํ˜•์„ฑํ•˜๋ฉฐ perovskite ์ƒ์€ ์ „๋Ÿ‰

๋…น๋Š” ๊ฒƒ์œผ๋กœ ์•Œ๋ ค ์กŒ๋‹ค.25 ๋”ฐ๋ผ์„œ ํก์ฐฉ์ฒด(S-5) ์ค‘์˜ Mo

์€ perovskite ์ƒ์ด ์งˆ์‚ฐ์— ๋…น์•„ ์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ๋‚ด์—์„œ

๊ธฐ์ฒด์ƒ์„ ํ˜•์„ฑํ•˜๋Š” MoO3์™€ ๊ฐ™์€ ํ˜•ํƒœ๋กœ ํœ˜๋ฐœํ•˜์—ฌ

Ag-silica gel ํก์ฐฉ์ฒด์— ํก์ฐฉ๋œ ๊ฒƒ์œผ๋กœ ์ถ”์ •๋œ๋‹ค. Fig.

6(B)๋Š” ์‹ค์ œ ์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ์‹œ๋ฃŒ๋กœ๋ถ€ํ„ฐ ํœ˜๋ฐœ๋œ ์š”์˜ค๋“œ

๋ฅผ ํก์ฐฉ์‹œํ‚จ ํฌ์ง‘๊ด€ ์•ž๋ถ€๋ถ„์˜ ํก์ฐฉ์ฒด(S-6)์— ๋Œ€ํ•œ

EDS ๋ถ„์„๊ฒฐ๊ณผ์ด๋‹ค. ์ด ๊ฒฐ๊ณผ๋Š” S-5์— ๋Œ€ํ•œ ๋ถ„์„๊ฒฐ๊ณผ

[Fig. 6(A)]์™€ ๋น„์Šทํ•œ ์ŠคํŽ™ํŠธ๋Ÿผ์„ ๋ณด์ด๋‚˜ ์ถ”๊ฐ€๋กœ ๋ฏธ๋Ÿ‰

์˜ ์š”์˜ค๋“œ๊ฐ€ ํก์ฐฉ๋˜์—ˆ์Œ์„ ๋ณด์—ฌ ์ค€๋‹ค. Fig. 7(A)๋Š” ์‹ค

์ œ ์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ์‹œ๋ฃŒ๋กœ๋ถ€ํ„ฐ ํœ˜๋ฐœ๋œ ์š”์˜ค๋“œ๋ฅผ ํก์ฐฉ

์‹œํ‚จ ํฌ์ง‘๊ด€ ๋งจ ์•ž๋ถ€๋ถ„์˜ ์œ ๋ฆฌ์†œ ํ•„ํ„ฐ(S-7)์— ๋Œ€ํ•œ

EDS ๋ถ„์„๊ฒฐ๊ณผ์ด๋‹ค. ์œ ๋ฆฌ์†œ ์„ฑ๋ถ„์›์†Œ๋“ค์˜ ํ”ผ์ดํฌ๋“ค ๋•Œ

๋ฌธ์— Ag-Silica gel ํก์ฐฉ์ฒด์˜ ์ŠคํŽ™ํŠธ๋Ÿผ๊ณผ ์ฐจ์ด๋ฅผ ๋ณด์ด

์ง€๋งŒ S-6์˜ ๋ถ„์„๊ฒฐ๊ณผ[Fig. 6(B)]์™€ ๋งˆ์ฐฌ๊ฐ€์ง€๋กœ ๋ฏธ๋Ÿ‰์˜

์š”์˜ค๋“œ๊ฐ€ ํก์ฐฉ๋˜์—ˆ์œผ๋ฉฐ, ๋˜ํ•œ, Mo์œผ๋กœ ์ถ”์ •๋˜๋Š” ์›์†Œ๊ฐ€

ํก์ฐฉ๋˜์—ˆ์Œ์„ ๋ณด์—ฌ ์ค€๋‹ค. Fig. 7(B)๋Š” ์œ ๋ฆฌ์†œ ํ•„ํ„ฐ(S-7)

์— ๋Œ€ํ•œ SEM ์‚ฌ์ง„์ด๋‹ค. ์„ฌ์œ ์ƒ์˜ ์œ ๋ฆฌ์†œ ํ‘œ๋ฉด์— ๋ณด์ด

๋Š” ํ•˜์–€์ƒ‰์˜ cluster๋“ค์€ ํฌ์ง‘๋œ ์š”์˜ค๋“œ์˜ ์‘์ถ• ํ™”ํ•ฉ๋ฌผ

๋กœ ์ถ”์ •๋˜์—ˆ๋‹ค.

3.3. ํก์ฐฉ์ฒด ์ค‘ ์š”์˜ค๋“œ ์ •๋Ÿ‰

๋ณธ ์—ฐ๊ตฌ์—์„œ์˜ ํœ˜๋ฐœ๋œ ์š”์˜ค๋“œ์˜ ์ด๋Ÿ‰์€ ํฌ์ง‘๊ด€๋‚ด์˜

Fig. 6. X-ray spectrum for Ag-Silicagel absorbent after dissolution with real spent nuclear fuel. A : middle portion of absorbent(S-5), B : front portion of absorbent (S-6)

Fig. 7. X-ray spectrum and SEM image for glass wool filter of absorption tube after dissolution with real spent nuclear fuel.A : X-ray spectrum, B : SEM image

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์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ ์šฉํ•ด ์ค‘ ํœ˜๋ฐœ ๋ฐ ์ž”๋ฅ˜ ์š”์˜ค๋“œ ๋ถ„์„ 403

Vol. 22, No. 5, 2009

ํก์ฐฉ์ฒด๋ฅผ ๊ตฌ๊ฐ„๋ณ„๋กœ ๋‚˜๋ˆ„์–ด ๋ถ„์„ํ•˜๊ณ  ๊ฐ ์ •๋Ÿ‰๊ฐ’์„ ํ•ฉ

ํ•˜์˜€๋‹ค. ํก์ฐฉ์ฒด ์ค‘์˜ ์š”์˜ค๋“œ ์ •๋Ÿ‰์€ ๊ธฐ๊ธฐ์  ์ค‘์„ฑ์ž ๋ฐฉ

์‚ฌํ™” ๋ถ„์„(INAA)์„ ์ด์šฉํ•˜์˜€๋‹ค. ์ค‘์„ฑ์ž ๋ฐฉ์‚ฌํ™” ๋ถ„์„

์€ ๋‹ค๋ฅธ ๋ถ„์„๋ฐฉ๋ฒ•์— ๋น„ํ•ด ๊ฐ๋„๊ฐ€ ๋†’๊ณ  ์ „์ฒ˜๋ฆฌ๊ฐ€ ๊ฐ„๋‹จ

ํ•˜๋ฉฐ, ๊ฑด์กฐ ๋ฐ ์‚ฐ์ฒ˜๋ฆฌ์— ์˜ํ•œ ํœ˜๋ฐœ์„ ๋ฐฉ์ง€ํ•  ์ˆ˜ ์žˆ์œผ

๋ฏ€๋กœ ๋ณธ ์‹คํ—˜์˜ ํก์ฐฉ์ฒด ๋ถ„์„์„ ์œ„ํ•œ ์ตœ์ ์˜ ๋ฐฉ๋ฒ•์œผ๋กœ

ํŒ๋‹จ๋˜์—ˆ๋‹ค. ๋ชจ์˜ ํ•ต์—ฐ๋ฃŒ ์‹œ๋ฃŒ๋กœ๋ถ€ํ„ฐ ํœ˜๋ฐœ๋˜์–ด ํก์ฐฉ๋œ127I์˜ ์–‘์€ ์ค‘์„ฑ์ž ํฌํš๋ฐ˜์‘์— ์˜ํ•˜์—ฌ ์ƒ์„ฑ๋˜๋Š” 128I์˜

๊ฐ๋งˆ์„ (433 keV)์„ Ge(Li) ๊ฒ€์ถœ๊ธฐ๋กœ ๊ณ„์ธกํ•˜๊ณ  ์ง์ ‘๋ฒ•

์œผ๋กœ ์ •๋Ÿ‰ํ•˜์˜€๋‹ค. ๋ฐ˜๋ฉด, ์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ์‹œ๋ฃŒ(N-1~N-4)

์ค‘์—๋Š” 127I ์™ธ์—๋„ ํ•ต๋ถ„์—ด์ƒ์„ฑ๋ฌผ 129I๊ฐ€ ํ•จ์œ ๋˜์–ด ์žˆ๋‹ค.

์ด๋“ค ์‹œ๋ฃŒ ์ค‘์— ํ•จ์œ ๋œ 129I์˜ ์ง์ ‘๋ฒ•์— ์˜ํ•œ ์ •๋Ÿ‰์€

ํก์ฐฉ์ฒด ์ค‘์˜ ๋‹ค๋Ÿ‰์˜ Ag์— ์˜ํ•œ ๊ฐ„์„ญ ๋•Œ๋ฌธ์— ํšจ๊ณผ์ ์ด

์ง€ ๋ชปํ•˜์˜€๋‹ค. ๋”ฐ๋ผ์„œ 129I์˜ ํ•จ๋Ÿ‰์€ 127I ์ •๋Ÿ‰๊ฒฐ๊ณผ์™€ ๋ณธ

์‹œ๋ฃŒ์˜ ํ•ต์—ฐ๋ฃŒ ์—ฐ์†Œ์ด๋ ฅ(35,000 MWD/MTU ์—ฐ์†Œ๋„

๋ฐ 3๋…„ ๋ƒ‰๊ฐ)์„ ๊ธฐ์ดˆํ•˜์—ฌ ํ”„๋กœ๊ทธ๋žจ(ORIGEN 2 code)

์„ ์ด์šฉํ•˜์—ฌ ๊ณ„์‚ฐ๋œ ํ•ต๋ถ„์—ด์ƒ์„ฑ๋ฌผ์˜ ๋น„(129I/127I)๋ฅผ ์ด

์šฉํ•˜์—ฌ ์‚ฐ์ถœํ•˜์˜€๋‹ค.26 Table 2์—๋Š” ์ค‘์„ฑ์ž ๋ฐฉ์‚ฌํ™” ๋ถ„์„

์— ์˜ํ•œ ์š”์˜ค๋“œ ์ •๋Ÿ‰๊ฒฐ๊ณผ๋ฅผ ๋‚˜ํƒ€๋‚ด์—ˆ๋‹ค. Ag-Silica gel

ํก์ฐฉ์ฒด(B-2) ๋ฐ ์ œ์กฐ์— ์ด์šฉํ•œ silica gel (B-1)์—์„œ๋Š”

์š”์˜ค๋“œ๊ฐ€ ์ „ํ˜€ ๊ฒ€์ถœ๋˜์ง€ ์•Š์•˜๋‹ค. ๋ชจ์˜ ์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ

๋กœ๋ถ€ํ„ฐ ํœ˜๋ฐœ๋œ ์š”์˜ค๋“œ๋ฅผ ํก์ฐฉ์‹œํ‚จ ๊ฒฝ์šฐ ํฌ์ง‘๊ด€์˜ ๋งจ

์•ž๋ถ€๋ถ„์˜ ํก์ฐฉ์ฒด์™€ ์œ ๋ฆฌ์†œ ํ•„ํ„ฐ๋ฅผ ํฌํ•จํ•˜๋Š” L-1์—์„œ

๋‹ค๋Ÿ‰์˜ ์š”์˜ค๋“œ๊ฐ€ ๊ฒ€์ถœ๋˜์—ˆ์œผ๋ฉฐ, ๊ทธ ์™ธ์˜ ๋ถ€๋ถ„(L-2, L-

3 ๋ฐ L-4)์—์„œ๋Š” ๊ฑฐ์˜ ๊ฒ€์ถœ๋˜์ง€ ์•Š์•˜๋‹ค. Ag-silica gel

ํก์ฐฉ๊ด€์— ์—ฐ๊ฒฐ๋œ NaOH ํฌ์ง‘๊ด€์˜ ์šฉ์•ก ์ผ์ •๋Ÿ‰์„ ์—ฌ๊ณผ

์ง€์— ํก์ฐฉ์‹œ์ผœ ์ค‘์„ฑ์ž ๋ฐฉ์‚ฌํ™” ๋ถ„์„์„ ํ•˜๊ณ ์ž ํ•˜์˜€์œผ

๋‚˜ Na-24 ๊ฐ๋งˆ์„ ์˜ ์‹ฌํ•œ ๊ฐ„์„ญ ๋•Œ๋ฌธ์— ์ธก์ •์ด ๋ถˆ๊ฐ€๋Šฅ

ํ•˜์˜€๋‹ค(P-1, P-2). ๊ทธ๋Ÿฌ๋‚˜ L-2~L-4์˜ ํก์ฐฉ์ฒด์—์„œ ์š”์˜ค

๋“œ๊ฐ€ ๊ฑฐ์˜ ๊ฒ€์ถœ๋˜์ง€ ์•Š์€ ์ ์œผ๋กœ ๋ณด์•„ NaOH ํฌ์ง‘์šฉ

์•ก ์ค‘์— ํก์ฐฉ๋œ ์š”์˜ค๋“œ๋Š” ์—†๋Š” ๊ฒƒ์œผ๋กœ ํŒ๋‹จ๋˜์—ˆ๋‹ค. ์‚ฌ

์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ์‹œ๋ฃŒ์˜ ๊ฒฝ์šฐ ํก์ฐฉ์ฒด ๊ฐ€์žฅ ๋’ท๋ถ€๋ถ„์ธ N-1

์—์„œ๋Š” ์š”์˜ค๋“œ๊ฐ€ ์ „ํ˜€ ๊ฒ€์ถœ๋˜์ง€ ์•Š์•˜์œผ๋ฉฐ N-2 ๋ฐ N-3

์—์„œ๋„ ๊ฑฐ์˜ ๊ฒ€์ถœ๋˜์ง€ ์•Š์•˜๋‹ค. ํก์ฐฉ์ฒด ์•ž๋ถ€๋ถ„์ธ N-4

์—์„œ ๋ฏธ๋Ÿ‰์˜ ์š”์˜ค๋“œ๊ฐ€ ๊ฒ€์ถœ๋˜์—ˆ๋‹ค. ์ƒ๊ธฐ S-7์˜ EDS

๋ถ„์„๊ฒฐ๊ณผ(Fig. 7)์—์„œ ๋‚˜ํƒ€๋‚œ ๋ฐ”์™€ ๊ฐ™์ด ํฌ์ง‘๊ด€ ๊ฐ€์žฅ

์•ž๋ถ€๋ถ„์ธ ์œ ๋ฆฌ์†œ ํ•„ํ„ฐ์—๋„ ๋ฏธ๋Ÿ‰์˜ ์š”์˜ค๋“œ๊ฐ€ ํฌ์ง‘๋˜์—ˆ

์„ ๊ฒƒ์œผ๋กœ ํŒ๋‹จ๋˜๋‚˜ ์œ ๋ฆฌ์†œ์— ํ•จ์œ ๋œ Na ์„ฑ๋ถ„์ด ์ค‘์„ฑ

์ž ๋ฐฉ์‚ฌํ™” ๋ถ„์„์„ ๊ฐ„์„ญํ•˜์—ฌ ์ •๋Ÿ‰์ด ๋ถˆ๊ฐ€๋Šฅํ•˜์˜€๋‹ค.

3.4. ์ด์˜จ๊ตํ™˜๋ฒ•์— ์˜ํ•œ ์š”์˜ค๋“œ ๋ถ„๋ฆฌ ๋ฐ ๋ถ„์„

๋ชจ์˜ ๋ฐ ์‹ค์ œ ํ•ต์—ฐ๋ฃŒ์‹œ๋ฃŒ์˜ ์šฉํ•ด๋กœ๋ถ€ํ„ฐ ์–ป์–ด์ง„ ์šฉ

ํ•ด์šฉ์•ก ๋ฐ ์šฉํ•ด ์ค‘ ๋ƒ‰๊ฐ๊ด€์— ์‘์ถ•๋œ ์š”์˜ค๋“œ๋ฅผ ์žฌ์ฆ๋ฅ˜

์‹œ์ผœ ํšŒ์ˆ˜ํ•œ ์šฉ์•ก์€ Fig. 2์˜ ๊ณผ์ •์— ๋”ฐ๋ผ ์š”์˜ค๋“œ๋ฅผ

๋ถ„๋ฆฌํ•˜์—ฌ ํšŒ์ˆ˜ํ•˜์˜€๋‹ค. ์‹œ๋ฃŒ์šฉ์•ก ์ค‘์˜ ๋ชจ๋“  ์š”์˜ค๋“œ ํ™”

ํ•™์ข…์€ NaClO ์šฉ์•ก์„ ์ฒจ๊ฐ€ํ•˜๊ณ  ๋ฐฉ์น˜ํ•˜์—ฌ periodate๋กœ

์‚ฐํ™”์‹œ์ผฐ๋‹ค. ์š”์˜ค๋“œ๋ฅผ ์ถ”์ถœ ๋ถ„๋ฆฌํ•˜๊ธฐ ์œ„ํ•˜์—ฌ ์ถ”์ถœ์ œ

(CCl4) ๋ฐ NH2OHยทHCl์šฉ์•ก์„ ๊ฐ€ํ•˜์—ฌ periodate๋ฅผ ์š”

์˜ค๋“œ๋กœ ํ™˜์›์‹œํ‚จ ํ›„ ์œ ๊ธฐ์ธต์œผ๋กœ ๋ถ„๋ฆฌํ•˜์˜€๋‹ค. ์ด์–ด ์ฆ

๋ฅ˜์ˆ˜์™€ K2S2O5 ์šฉ์•ก์„ ๊ฐ€ํ•˜์—ฌ ์š”์˜ค๋“œ๋ฅผ ๋‹ค์‹œ iodide๋กœ

ํ™˜์›์‹œํ‚จ ํ›„ ์ˆ˜์šฉ์•ก์œผ๋กœ ์—ญ์ถ”์ถœ ๋ถ„๋ฆฌํ•˜์˜€๋‹ค. ํšŒ์ˆ˜ํ•œ

์š”์˜ค๋“œ๋ฅผ ์ •์ œ ๋ฐ ์ค‘์„ฑ์ž ๋ฐฉ์‚ฌํ™”์„ ์œ„ํ•œ ์ด์˜จ๊ตํ™˜์ˆ˜

Table 2. Dertermination of iodine in the adsorbent by INAA

Sample Irrad. Time MethodFound (ยตg) Count. error

RemarkI-127 I-129 (%)

B-11 min. Absolute

N.D - -

B-2 N.D - -

L-1 493 - 1.25

L-21 min. Absolute

0.26 - 17

L-3 0.18 - 17

L-4 0.53 - 11

P-11 min. Absolute

I.M - - Strong Na-24

P-2 I.M - - Strong Na-24

N-1

1 min. Absolute

N.D N.D -

N-2 0.20 0.640 38

N-3 0.12 0.384 30

N-4 2.54 8.123 5.1

N-5 I.M I.M - Strong Na-24

N.D : non detected, I.M : imposible measurement

Page 10: Determination of volatile and residual iodine during the ...

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Analytical Science & Technology

์ง€์— ํก์ฐฉ์‹œํ‚ค๊ธฐ ์œ„ํ•˜์—ฌ ์—ญ์ถ”์ถœ ๋ถ„๋ฆฌํ•œ ์ˆ˜์šฉ์•ก์„ ์ œ

์ž‘ํ•œ ๋ถ„๋ฆฌ๊ด€์— ์ฒœ์ฒœํžˆ ํก์ฐฉ์‹œํ‚ค๊ณ  ์ฆ๋ฅ˜์ˆ˜๋กœ ์”ป์–ด์„œ

๋‹ค๋ฅธ ์–‘์ด์˜จ๋“ค์„ ์ œ๊ฑฐํ•˜์˜€๋‹ค. ๋ถ„๋ฆฌ์— ์ด์šฉํ•œ ๋ถ„๋ฆฌ๊ด€์€

ํด๋ฆฌ์—ํ‹ธ๋ Œ ์žฌ์งˆ๋กœ ํŠน๋ณ„ํžˆ ์ œ์ž‘ํ•˜์˜€์œผ๋ฉฐ ์š”์˜ค๋“œ๋ฅผ ํก

์ฐฉ์‹œํ‚จ ์ด์˜จ๊ตํ™˜์ˆ˜์ง€์™€ ํ•จ๊ป˜ ์ค‘์„ฑ์ž ๋ฐฉ์‚ฌํ™”๋ฅผ ์œ„ํ•œ

์‚ฝ์ž…์ฒด(insert)๋กœ ์ด์šฉํ•˜์˜€๋‹ค. ์˜ˆ๋น„์‹คํ—˜์œผ๋กœ ์ œ์กฐํ•œ ๋ถ„

๋ฆฌ๊ด€์— ์š”์˜ค๋“œ ์ˆ˜์šฉ์•ก์„ ํก์ฐฉ์‹œํ‚จ ํ›„ ์šฉ์ถœ์šฉ์•ก์„ ์ทจ

ํ•˜์—ฌ ์š”์˜ค๋“œ ์ •์ƒ‰๋ฐ˜์‘์„ ์‹œํ—˜ํ•ด ๋ณด์•˜์œผ๋‚˜ ๋ฐ˜์‘์ด ๋‚˜

ํƒ€๋‚˜์ง€ ์•Š์•˜์œผ๋ฏ€๋กœ ์š”์˜ค๋“œ์˜ ์ด์˜จ๊ตํ™˜์ˆ˜์ง€ ํก์ฐฉ์€ ๋งค

์šฐ ํšจ๊ณผ์ ์ด์—ˆ๋‹ค.27 Table 3์˜ S-1, S-2, S-3๋Š” ์š”์˜ค๋“œ

์ •๋Ÿ‰์— ์ด์šฉํ•˜๊ธฐ ์œ„ํ•˜์—ฌ ์—ฌ๋Ÿฌ ๋†๋„์˜ ์š”์˜ค๋“œ ํ‘œ์ค€์šฉ

์•ก์„ ์ด์˜จ๊ตํ™˜์ˆ˜์ง€์— ํก์ฐฉ์‹œํ‚จ ํ›„ ์ค‘์„ฑ์ž ๋ฐฉ์‚ฌํ™” ๋ถ„

์„์„ ์ˆ˜ํ–‰ํ•œ ๊ฒฐ๊ณผ์ด๋‹ค. 100๋ฐฐ ๋†๋„์ฐจ์ด๋ฅผ ๋ณด์ด๋Š” ํ‘œ์ค€

์šฉ์•ก ํก์ฐฉ์‹œ๋ฃŒ๋“ค์„ ์ค‘์„ฑ์ž ๋ฐฉ์‚ฌํ™” ๋ถ„์„์œผ๋กœ ์ •ํ™•ํ•˜๊ฒŒ

์ธก์ •ํ•  ์ˆ˜ ์žˆ์—ˆ๋‹ค. Table 3์˜ Y-1, Y-2๋Š” ์šฉ๋งค์ถ”์ถœ ๋ฐ

์—ญ์ถ”์ถœ ๊ณผ์ •์— ๋Œ€ํ•œ ์š”์˜ค๋“œ์˜ ํ™”ํ•™์  ํšŒ์ˆ˜์œจ์ธก์ •์„

์œ„ํ•˜์—ฌ ํ‘œ์ค€์šฉ์•ก ์ผ์ •๋Ÿ‰์„ ์šฉ๋งค์ถ”์ถœ ๋ฐ ์—ญ์ถ”์ถœํ•˜์—ฌ

๋ถ„๋ฆฌ ํšŒ์ˆ˜ํ•˜๊ณ  ์ด์˜จ๊ตํ™˜์ˆ˜์ง€์— ํก์ฐฉ์‹œํ‚จ ํ›„ ์ค‘์„ฑ์ž

๋ฐฉ์‚ฌํ™” ๋ถ„์„์œผ๋กœ ์ธก์ •ํ•œ ๊ฒฐ๊ณผ์ด๋‹ค. ๋‘ ์ธก์ •๊ฒฐ๊ณผ๋Š”

0.4% ์ƒ๋Œ€์˜ค์ฐจ ๋ฒ”์œ„์—์„œ ์ผ์น˜ํ•˜์˜€์œผ๋ฉฐ ํ‰๊ท  ํšŒ์ˆ˜์œจ์€

86.1%์ด์—ˆ๋‹ค. ๋ชจ์˜ ์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ์‹œ๋ฃŒ ์šฉํ•ด ํ›„ ๋ถ„๋ฆฌ

ํšŒ์ˆ˜ํ•œ ์šฉํ•ด์šฉ์•ก(D-1, D-2) ๋ฐ ์‘์ถ•์šฉ์•ก(C-1, C-2) ์ค‘

์˜ ์š”์˜ค๋“œ ํ•จ์œ ๋Ÿ‰์„ ํ‘œ์ค€์‹œ๋ฃŒ์™€ ๋™์ผํ•œ ์กฐ๊ฑด์œผ๋กœ ์ค‘

์„ฑ์ž ๋ฐฉ์‚ฌํ™” ๋ถ„์„์œผ๋กœ ์ธก์ •ํ•œ ๊ฒฐ๊ณผ Table 3๊ณผ ๊ฐ™์ด ๋‚˜

ํƒ€๋‚ฌ๋‹ค.

3.5. ์นจ์ „๋ฒ•์— ์˜ํ•œ ์š”์˜ค๋“œ ๋ถ„๋ฆฌ ๋ฐ ๋ถ„์„

ํ•ต์—ฐ๋ฃŒ ์ค‘์˜ ์š”์˜ค๋“œ ํšŒ์ˆ˜ ๋ฐ ์ •๋Ÿ‰์˜ ๋น„๊ต๋ถ„์„์œผ๋กœ

์š”์˜ค๋“œ๋ฅผ ์ด์˜จ๊ตํ™˜์ˆ˜์ง€์— ํก์ฐฉ์‹œํ‚ค๋Š” ๋ฐฉ๋ฒ• ๋Œ€์‹  AgI

์นจ์ „์œผ๋กœ ์š”์˜ค๋“œ๋ฅผ ๋ถ„๋ฆฌํ•˜๋Š” ๋ฐฉ๋ฒ•์„ ์ด์šฉํ•˜์˜€๋‹ค(Fig.

2). I-127 ํ‘œ์ค€์šฉ์•ก์„ ์ถ”์ถœ ๋ถ„๋ฆฌํ•œ ์šฉ์•ก ์ผ์ •๋Ÿ‰์— 0.1

M AgNO3 ์šฉ์•ก์„ ๊ฐ€ํ•˜์—ฌ AgI ์นจ์ „์„ ์ƒ์„ฑ์‹œํ‚จ ๋‹ค์Œ

์ƒ๊ธฐ์˜ ์ด์˜จ๊ตํ™˜๋ถ„๋ฆฌ๊ด€๊ณผ ๊ฐ™์€ ํฌ๊ธฐ๋กœ ์ œ์ž‘ํ•œ ํด๋ฆฌ์—

ํ‹ธ๋ Œ ์—ฌ๊ณผํ‚คํŠธ์— ๊ฑฐ๋ฆ„์ข…์ด(Whatman 44, 3 mm ์ง๊ฒฝ)

๋ฅผ ๋ผ์šฐ๊ณ  ํด๋ฆฌ์—ํ‹ธ๋ Œ ๊ด€์„ ํ†ตํ•˜์—ฌ ์นจ์ „๋ฌผ์„ ์—ฌ๊ณผํ•˜

์˜€๋‹ค. ์นจ์ „๋ฌผ์„ ๊ฑด์กฐ์‹œํ‚จ ํ›„ ์—ฌ๊ณผํ‚คํŠธ์˜ ๋งˆ๊ฐœ๋ฅผ ํ•˜๊ณ 

ํด๋ฆฌ์—ํ‹ธ๋ Œ ๋ฐ”์ด์•Œ์— ์žฌํฌ์žฅํ•˜์˜€๋‹ค. ํšŒ์ˆ˜์œจ์ธก์ •์„ ์œ„

ํ•œ ํ‘œ์ค€์‹œ๋ฃŒ๋กœ์„œ ์š”์˜ค๋“œ ํ‘œ์ค€์šฉ์•ก(HIO3 ์šฉ์•ก) ์ผ์ •๋Ÿ‰

์„ ๊ฐ™์€ ์ข…๋ฅ˜์˜ ์—ฌ๊ณผํ‚คํŠธ ๊ฑฐ๋ฆ„์ข…์ด์— ํก์ฐฉ์‹œํ‚ค๊ณ  ๋งˆ

๊ฐœ ๋ฐ ์žฌํฌ์žฅํ•˜์—ฌ ๋งŒ๋“  ํ›„ ์‹œ๋ฃŒ์™€ ํ•จ๊ป˜ ์ค‘์„ฑ์ž ๋ฐฉ์‚ฌ

ํ™” ๋ถ„์„์„ ํ•˜์˜€๋‹ค. ๋ถ„์„๊ฒฐ๊ณผ ํšŒ์ˆ˜์œจ์€ 84.7%๋กœ์„œ ์ด

์˜จ๊ตํ™˜์ˆ˜์ง€์— ํก์ฐฉ์‹œํ‚จ ๊ฒฝ์šฐ๋ณด๋‹ค ์•ฝ๊ฐ„ ๋‚ฎ๊ฒŒ ๋‚˜ํƒ€๋‚ฌ๋‹ค.

์นจ์ „์ œ์— ์˜ํ•œ ๋‹ค๋Ÿ‰์˜ Ag์™€ ์ถ”์ถœ์ œ๋กœ๋ถ€ํ„ฐ ์œ ์ž…๋˜๋Š”

Cl์ด ์ค‘์„ฑ์ž ๋ฐฉ์‚ฌํ™” ๋ถ„์„์„ ๊ฐ„์„ญํ•˜์˜€๋‹ค. ๋ณธ ๋ฐฉ๋ฒ•(์šฉ๋งค

์ถ”์ถœ-AgI ์นจ์ „-์ค‘์„ฑ์ž ๋ฐฉ์‚ฌํ™” ๋ถ„์„)์€ ๋น„๋ฐฉ์‚ฌ์„ฑ๊ตฌ์—ญ์—

์„œ ์ˆ˜ํ–‰ํ•˜๋Š” ๋ชจ์˜ ์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ์‹œ๋ฃŒ ์ค‘์˜ ์š”์˜ค๋“œ

์ •๋Ÿ‰์— ํšจ๊ณผ์ ์œผ๋กœ ์ ์šฉํ•  ์ˆ˜ ์žˆ๋‹ค. ๋ฐ˜๋ฉด, ์ƒ๊ธฐ์˜ ์ด

์˜จ๊ตํ™˜์ˆ˜์ง€ํก์ฐฉ๋ฒ•์— ์˜ํ•œ ์š”์˜ค๋“œ ๋ถ„๋ฆฌ ๋ฐ ๋ถ„์„์˜ ๊ฒฝ

์šฐ์™€ ๋งˆ์ฐฌ๊ฐ€์ง€๋กœ ๋ฐฉ์‚ฌ์„ฑ๊ตฌ์—ญ์—์„œ ์›๊ฒฉ์ž‘์—…์„ ์ˆ˜ํ–‰ํ•ด

์•ผ ํ•˜๋Š” ์‹ค์ œ ํ•ต์—ฐ๋ฃŒ์‹œ๋ฃŒ๋กœ๋ถ€ํ„ฐ์˜ ์š”์˜ค๋“œ ๋ถ„๋ฆฌ ๋ฐ ๋ถ„

์„์— ์ ์šฉํ•˜๊ธฐ ์œ„ํ•ด์„œ๋Š” ๊ฐœ์„ ์ด ํ•„์š”ํ•˜์˜€๋‹ค.

3.6. ์šฉํ•ด์šฉ์•ก ๋ฐ ์‘์ถ•์šฉ์•ก ์ค‘ ์š”์˜ค๋“œ๋ถ„ํฌ ์ธก์ •

๋ชจ์˜ ์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ์‹œ๋ฃŒ๋ฅผ ์ด์šฉํ•˜์—ฌ ์šฉํ•ด ํ›„ Ag-

silicagel ํก์ฐฉ์ฒด ๋ถ„์„์— ์˜ํ•œ ํœ˜๋ฐœ๋œ ์š”์˜ค๋“œ, ์ด์˜จ๊ตํ™˜

์ˆ˜์ง€ ๋ถ„์„์— ์˜ํ•œ ์šฉํ•ด ๋ฐ ์‘์ถ•์šฉ์•ก ์ค‘์˜ ์ž”๋ฅ˜๋œ ์š”

์˜ค๋“œ ๋ถ„์„๊ฒฐ๊ณผ๋ฅผ ๋ฐ”ํƒ•์œผ๋กœ ์šฉํ•ด์— ๋”ฐ๋ฅธ ์š”์˜ค๋“œ ๋ถ„ํฌ

๋ฅผ ์‚ฐ์ถœํ•˜์˜€๋‹ค. ํก์ฐฉ์ฒด ์ค‘์˜ ์š”์˜ค๋“œ๋Š” ๊ตฌ๊ฐ„๋ณ„ ์‹œ๋ฃŒ๋ฅผ

๊ท ์งˆํ™”ํ•˜๊ณ  ๋Œ€ํ‘œ์‹œ๋ฃŒ๋ฅผ ์ทจํ•˜์—ฌ ๋ฌด๊ฒŒ๋ฅผ ์ธก์ •ํ•œ ํ›„ ์ค‘

์„ฑ์ž ๋ฐฉ์‚ฌํ™” ๋ถ„์„์„ ํ•˜์—ฌ ๊ตฌ๊ฐ„ ์ „์ฒด์— ํ•จ์œ ๋œ ์–‘์„

์‚ฐ์ถœํ•˜์˜€๋‹ค. ์šฉํ•ด ๋ฐ ์‘์ถ•๋œ ์š”์˜ค๋“œ๋Š” ์ค‘์„ฑ์ž ๋ฐฉ์‚ฌํ™”

๋ถ„์„ ๊ฒฐ๊ณผ์˜ ํ‰๊ท ๊ฐ’ ๋ฐ ์‹œ๋ฃŒ ํฌ์„๋ฐฐ์œจ์„ ๊ณฑํ•˜์—ฌ ์‚ฐ์ถœ

ํ•˜์˜€๋‹ค. ๋ชจ์˜ ์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ์‹œ๋ฃŒ์— ์ฒจ๊ฐ€ํ•œ ์ด ์š”์˜ค๋“œ

๋Š” 10.99 mg, ํก์ฐฉ์ฒด ์ค‘์—์„œ ๊ฒ€์ถœ๋œ ์–‘์€ 1.20 mg,

Table 3. Dertermination of iodine in the ion exchanger by INAA

Sample Irrad. Time Method Found (ยตg) Count. error (%) Remark

S-1 978 0.9

Strong Cl-38S-2 1 sec. Relative 97.7 2.9

S-3 9.8 9.1

Y-11 sec. Relative

844 0.8Strong Cl-38

Y-2 841 1.1

C-11 sec. Relative

421 1.5Strong Cl-38

C-2 358 1.3

D-11 sec. Relative

207 1.2Strong Cl-38

D-2 247 1.5

Page 11: Determination of volatile and residual iodine during the ...

์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ ์šฉํ•ด ์ค‘ ํœ˜๋ฐœ ๋ฐ ์ž”๋ฅ˜ ์š”์˜ค๋“œ ๋ถ„์„ 405

Vol. 22, No. 5, 2009

์šฉํ•ด์šฉ์•ก ์ค‘์—์„œ ๊ฒ€์ถœ๋œ ์–‘์€ 5.27 mg, ๊ทธ๋ฆฌ๊ณ  ์‘์ถ•

์šฉ์•ก ์ค‘์—์„œ ๊ฒ€์ถœ๋œ ์–‘์€ 4.52 mg์œผ๋กœ ๋‚˜ํƒ€๋‚ฌ๋‹ค. ๋”ฐ

๋ผ์„œ ๋ณธ ํ•ต์—ฐ๋ฃŒ ์šฉํ•ด์กฐ๊ฑด(8 M HNO3 ์šฉ์•ก์œผ๋กœ 90 oC

์—์„œ 4์‹œ๊ฐ„ ํ™˜๋ฅ˜ ์šฉํ•ด)์—์„œ์˜ ์š”์˜ค๋“œ๋ถ„ํฌ๋Š” ์šฉํ•ด ์ค‘

์™„์ „ํžˆ ํœ˜๋ฐœ๋œ ์š”์˜ค๋“œ๋Š” 10.9%, ํœ˜๋ฐœ ํ›„ ๋ƒ‰๊ฐ๊ธฐ์— ์‘

์ถ•๋œ ์š”์˜ค๋“œ๋Š” 41.1%, ์šฉํ•ด์šฉ์•ก์— ์ž”๋ฅ˜ํ•˜๋Š” ์š”์˜ค๋“œ๋Š”

48.0%์ธ ๊ฒƒ์œผ๋กœ ๋‚˜ํƒ€๋‚ฌ๋‹ค.

4. ๊ฒฐ ๋ก 

์ƒ๊ธฐ์˜ ์‹คํ—˜๊ฒฐ๊ณผ๋กœ๋ถ€ํ„ฐ ๋‹ค์Œ๊ณผ ๊ฐ™์€ ๊ฒฐ๋ก ์„ ์–ป์„

์ˆ˜ ์žˆ์—ˆ๋‹ค.

1. Ag-silicagel ํก์ฐฉ์ฒด์— ๋Œ€ํ•œ ๋ถ€๋ถ„๋ณ„ ์‹œ๋ฃŒ์— ๋Œ€ํ•œ

EPMA ๋ถ„์„์œผ๋กœ ํœ˜๋ฐœ์š”์˜ค๋“œ์˜ ํก์ฐฉ์ฒด์— ๋Œ€ํ•œ ํ™”ํ•™์ 

ํก์ฐฉ๊ฑฐ๋™์— ๋Œ€ํ•œ ์ •๋ณด๋ฅผ ์–ป์„ ์ˆ˜ ์žˆ์—ˆ๋‹ค.

2. ๋ณธ ์—ฐ๊ตฌ์—์„œ์˜ Ag-silicagel ํก์ฐฉ์ฒด๋Š” ๋ชจ์˜ ์‚ฌ์šฉ

ํ›„ ํ•ต์—ฐ๋ฃŒ ๋ฐ ์‹ค์ œ ์‚ฌ์šฉ ํ›„ ํ•ต์—ฐ๋ฃŒ ์‹œ๋ฃŒ์˜ ์šฉํ•ด๊ณผ์ •

์—์„œ ํœ˜๋ฐœ๋˜๋Š” ์š”์˜ค๋“œ๋ฅผ ์ „๋Ÿ‰ ํก์ฐฉ์‹œํ‚ฌ ์ˆ˜ ์žˆ์—ˆ๋‹ค.

3. Ag-silicagel ํก์ฐฉ์ฒด ์ค‘์˜ ์š”์˜ค๋“œ๋Š” ํก์ฐฉ์ฒด๋ฅผ ๊ตฌ

๊ฐ„๋ณ„๋กœ ๋‚˜๋ˆ„๊ณ  ๊ฐ ๋ถ€๋ถ„๋ณ„ ๋Œ€ํ‘œ์‹œ๋ฃŒ์— ๋Œ€ํ•œ ์ค‘์„ฑ์ž ๋ฐฉ

์‚ฌํ™” ๋ถ„์„์„ ํ•˜์—ฌ ํก์ฐฉ๋œ ์š”์˜ค๋“œ๋ฅผ ํšจ๊ณผ์ ์œผ๋กœ ์ •๋Ÿ‰

ํ•  ์ˆ˜ ์žˆ์—ˆ๋‹ค.

4. ๋ณธ ์—ฐ๊ตฌ์—์„œ์˜ Ag-silicagel ํก์ฐฉ์ฒด๋Š” ์‚ฌ์šฉ ํ›„ ํ•ต

์—ฐ๋ฃŒ์‹œ๋ฃŒ ์šฉํ•ด๊ณผ์ •์—์„œ ํœ˜๋ฐœ๋˜๋Š” 14C(CO2)๊ฐ€ ํก์ฐฉ๋˜

์ง€ ์•Š์œผ๋ฏ€๋กœ ์š”์˜ค๋“œ์˜ ๊ฐ„์„ญ์—†์ด NaOH ํฌ์ง‘์šฉ์•ก์œผ๋กœ

ํšŒ์ˆ˜๊ฐ€๋Šฅํ•˜๋ฉฐ ๋™์‹œ์ •๋Ÿ‰์ด ๊ฐ€๋Šฅํ•˜์˜€๋‹ค.

5. ํ•ต์—ฐ๋ฃŒ ์šฉํ•ด์šฉ์•ก ๋ฐ ์‘์ถ•์šฉ์•ก ์ค‘์˜ ์š”์˜ค๋“œ๋Š” ์šฉ

๋งค์ถ”์ถœ ๋ฐฉ๋ฒ•์œผ๋กœ ํšŒ์ˆ˜ ๋ฐ ์ค‘์„ฑ์ž ๋ฐฉ์‚ฌํ™” ๋ถ„์„์„ ์œ„ํ•œ

์ด์˜จ๊ตํ™˜์ˆ˜์ง€์— ํšจ๊ณผ์ ์œผ๋กœ ํก์ฐฉ์‹œํ‚ฌ ์ˆ˜ ์žˆ์—ˆ๋‹ค.

6. ์ œ์ž‘ํ•œ ํด๋ฆฌ์—ํ‹ธ๋ Œ ์ด์˜จ๊ตํ™˜๋ถ„๋ฆฌ๊ด€ ๋ฐ ์—ฌ๊ณผํ‚คํŠธ

๋ฅผ ํ™”ํ•™์  ๋ถ„๋ฆฌ๋ฅผ ์œ„ํ•œ ๋ถ„๋ฆฌ๊ด€ ๋ฐ ์ค‘์ƒ์ž ๋ฐฉ์‚ฌํ™”๋ฅผ

์œ„ํ•œ ์‚ฝ์ž…์ฒด๋กœ ํšจ๊ณผ์ ์œผ๋กœ ์ด์šฉํ•  ์ˆ˜ ์žˆ์œผ๋‚˜ ์ •๊ตํ•œ

์ž‘์—…์ด ์ˆ˜๋ฐ˜๋˜๋ฏ€๋กœ ์›๊ฒฉ์ž‘์—…์— ์ด์šฉํ•˜๊ธฐ์—๋Š” ๊ฐœ์„ ์ด

ํ•„์š”ํ•˜์˜€๋‹ค.

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