DISTRI3UTION AF''ER ISSUANCE OF OPERATING LICENSE

1RC PCeu 195 u.s. NuCLEAn mEcutATCmv caMMISSICN QCCKET NUMSE R--

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Mr. R. Reid Met. Ed. Co. i

Reading, Pa. 19603-

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J.G. Herbein 9-23 77 ',

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;13CMIPTION ENCLCSU RELtr trans the following: 2P Reviews of the metallurgical prcperties

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?LANI NAME: Three Mile Island Unit 1

DHL 9-23-77,

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SAFrTY FOR ACTION /INFORMATION i

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EXTERNAL CISTRIBUTICN i CONTROL NUMBER

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METHOPOLI FAN EDISON COMPANY. _ _ _._. _ _ _ _ ._ -

POST OFFICE BOX 542 READING, PENNSYLV ANI A 19603 TELEPHONE 215 - 929 2601

September 21, 1977GQL 1259

Director of Nuclear Reactor RegulationAttn: R. '4. Reid, ChiefOperating Reactors Branch No. hU. S. Nuclear Regulatory Cc==issionWashington, D. C. 20555

Dear Sir:

Three Mile Island Nuclear Station, Unit 1 (TIE-1)Docket No. 50-289

Operating License No. DPR-50 1492 031Decay Heat Pump ShaftsMetallurgical Properties Preliminary Report

This letter is in response to Paragraph No. 3 of Metropolitan Edison Cc=pany,GQL 123h, September 8,1977 Both Met-Ed and Babecek and Wilcox have re-viewed, to the extent possible, the metallurgical prcperties of the DH-P-1A/3shafts as documented by record. Results of these reviews are as follovs:

1. Cn January 21, 1969, Worthington Corpcratien added PT #930679-1 to theirBill of Material for the T!E-1 Decay Heat Pumps. This addition specifiedWorthington Material Mh273 (IT h PH, Condition A). See Attachment No. 1.

2. Cn February 12, 1969, Worthingten issued Purchase order No. WPh53200-Hto U. S. Steel Supply Div. Siis Purchase Crder specified 17 h PH (Mh273)Ccndition A Material. See Attachment No. 2.

3 U. S. Steel Supply's Mauerial Test Repert, February 13, 1969, specifies17 h PH Conditica A =aterial. Review of the chemical properties indicatedthe material to be acceptable. However, rtview of the mechanical propertiesindicated that the material may have been heat treated. '"here for e ,Worthington may have received the material in other than Condition A.'4crthington has stated that they always heat treat per their drawing re-quirements to the H1150 conditien, and that material has been releasedfor m'nufacture and heat treatment upon verification and approval ofchemistry only. See Attachment No. 3. Additienally, this =aterial testreport, due to poor copying, is confusing in that it appears to shev atensile strength of 179,000 psi, a yield strength of 190,000 psi, ani a17-4 PH Condition H. Our copy indicates a tensile strength of 199,000 psi,a yield strength of 190,000 psi, and a 17 k PH Condition A. At sc=e pointduring the distribution of copies, a copy was inked-in causing the errorsin the above values.

7724&/4f

.

R. W. Reid, Chief -2- Septe=ber 21, 1977.

GQL 1289

k. Review of Worthington's procedure indicates that fabricaticn and heattreatment is per their drawing requirements. Drawing No. RX-130679Cspecifies H1150 shop heat treatment before machining. See Attach =entNo. h.

Based upcn review thus far, it is both Met-Ed's and B&W's contentien thatthe material used for fabrication of the TMI-1, DH-P-1A/B shafts was in fact17 h FH properly heat treated to H1150. Although material test reports arenot available to document the heat treatment for the DH-P-1A/3 shafts, thereis no reascn to assume that Worthington vould have deviated frc= their normalprocedure such that the 17 h FH =aterial was not H1150 heat treated. It

should be noted, the BLW Specification CS-3-30/NSS-5/0369, required recordretention for five years only,and the records nave been subsequently destrcyed.

Review of the =aterial certifications for the spare shafts is being performed,and results of this reviev vill be included in the final report to be submittedby October 5, 1977 To date, we have en hand Ultrasonic Test Reports, materialtest reports for pre heat treatment, and certification of H1150 heat treatmentfor two of the three spare shafts.

Also attached, please find the Vibration Test Data of Septe=ber 5,1977, pertelecen of September 16, 1977, between your G. 3. Zwet ig and our R. J.Stevens.

Sincerely-

N/ J./. HerbeinGVice-President

JGH:RJS:dkf

Attachment (1) Worthingten Corpcraticn Bill of Material,1/27/69(2) Worthingten Corporation Purchase Order WFh53200-H, 2/12/69(3) U. S. Steel Supply Material Test Report, 2/13/69(h) Worthingten Corporation Drawing No. RX-130679C(5) DH-P-1A/B vibration Test Data, 9/5/77

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THE FOLL0d!NG C0r.STITUTES*

SEAL PIPING PER RY155360-

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