21 –23 Feb 2005 NORM Workshop 2005
Specification SP 1170 Version .3.0
– Defines responsibilities– Est. Dose limits– Inc. NORM Radiological Surveys
into the PTW – Training– Transport and Storage Locations– Emergency Procedures– Incorporates NORM Management
Guidelines
21 –23 Feb 2005 NORM Workshop 2005
SP 1170• PDO Policy
– Plant that has conveyed or stored production fluids (water/oil) or gas are potentially NORM contaminated.
• Dose Limits– 1 mSv/year for PDO workers & contractors
– NORM Guideline CSM.001 provides guidance on action limits
• Inhalation / Ingestions Limits– 5 cps above background - PPE
21 –23 Feb 2005 NORM Workshop 2005
NORM Management Guidelines
• Based on Syrian Guidelines– “How to”….. guidelines – Inc. NRS in PTW for consistency of approach– Added flow charts for specific activities– Modified to include PDO’s meters
21 –23 Feb 2005 NORM Workshop 2005
HEMP - Permit To Work
• Production oil/gas/water - conveyed/stored – Trips PTW which requires a NORM
Radiological Survey (NRS)– Measurements conducted by RPT– Recorded and attached to PTW– NRS stipulates controls
• e.g. PPE, Supervised/Controlled Areas.
21 –23 Feb 2005 NORM Workshop 2005
Example - Zauliyah
• Measurements for Tank T7402– Ground 5 μSv/hour (450 - 500 cps) exterior wall
– At 50 cm above ground = 2.0 μSv/hr exterior wall
– At 1.0 m above ground = 1.5 μSv/hr (125 cps) exterior wall
– At 1.5 m above ground = 20 cps exterior wall
Inside tank in centre approx. 15 - 20 μSv/hrWorkers 4 hrs per day inside cleaning = 80 μSv/day
80 uSv/day x 14 (days) = 1120 μSv/2 weeks inside tank
> 1 mSv/2 weeks
21 –23 Feb 2005 NORM Workshop 2005
INSTS USED TESTED (TICK)
CONDITION WORK TYPE BACKGROUND
MiNI MONITOR - EP 15 SLUDGE √ WET 3 CPSMINI MONITOR - 44A/B √ SAND DRY CPSGRAETZ 5X DOSE-RATE √ SCALE HOT CPSMini 1000 Dose-Rate Meter FLUID AGGRESSIVE 0.1 Sv/h
EXTERNAL OR INTERNAL
Mini 900 EP15 Probe GAMMA Sv/h GAMMA Sv/h
(E / I) CPS CONTACT AT WORK POSITIONExt 5.2 1 - 5.2 Ext 20 20Ext 0.2 1-5.2Int. 20 20
RPA to complete
√√√ UIB 10 3 (24)
OICC 10 3 (24)√ OICC 10 20 (80)√ Al-Hassan 10 1 (8)
OICC 10 20 (80)√ OICC 10 20 (80)√ OICC 10 20 (80)
√√√
√
SURVEYED BY REF IND.DATE SUPERVISOR NAME DATERPS/RPT MSE 32 30/1/2005
Distribution: White copy: Attach to Work Permit. Pink copy: PDO Supervisor/Operator, to keep copy at site. Green copy: Local RPS/RPT Records
TOTAL HOURS WORKED
ESTIMATED DOSE IN μSv/h (μSv/day)
CPS
Job Supervisor to complete and pass to Focal Point after permit closure.
50020025800
If > 5 cps above background use f iltering face-piece respirator type P3 (FFP3).Area demarcation & w arning signs requiredWelding - Full face respirator w ith P3 f ilter. On RPS AdviceAir supplied respiratory equipment. On RPS Advice
DATE 30/01/2005
TIME WORK PERMIT No: 24362
WETFIELD LOCATION: Zauliyah
DRY
CONTAMINATION TYPE (TICK)
Special NORM Precautions: (Tick as appropriate)
Equipment/Area testedTank 7402 at bottomexterior at 50 cm above base
SoudVikhram
Moh'd AhmedPatel
Washing/decontamination facilities required for w orkersWorkers to be checked for NORM contamination before leaving radiological area Contamination check of area and tools required after completing w ork.
Brett Young Moh'd Al-Bahja
Area demarcation & w arning signs requiredFloor area to be covered w ith heavy quality polythene sheeting
NAME
Contaminated items to be w rapped in plastic sheet and labelled w ith signsTransport & Disposal arrangements required for contaminated materials
Mini 900 44A/B Probe
DEPARTMENT / CONTRACTOR
If Dose-Rate > 1Sv/h - Record exposed w orkers names in next column. If Dose-Rate > 7.5Sv/h Contact RPS or CRFP for advice and restrict entry.
DharmaKhalifa
Impervious/disposable coverall, hood, PVC/rubber gloves, (rubber) boots,goggles. PERSONNEL INVOLVED
IN NORM WORK
1.5 metres high on exterior of tankInternal dose rate of tank
Example of NORM Survey Report Certificate No: 24372
21 –23 Feb 2005 NORM Workshop 2005
Monitoring of Personnel
• Action Limit 1 μSv/hour• Record on NORM Radiological Survey• Attached to PTW• RPT estimates workers daily dose• > 8 μSv/day record into a database
• Risk assessment - Tank cleaners and sludge farm operators required to wear TLD Badge
21 –23 Feb 2005 NORM Workshop 2005
Bahja NORM Storage facility
Rest Room & Toilet
Scrap metal50m x 25m
Drum storage50m x 25m
400 m
400 m
Entrance
gate
* Concrete pad100 m x 50 m
Tubulars50m x 25m
2 PitsSludge Storage100m*10m*1m depth
21 –23 Feb 2005 NORM Workshop 2005
NORM Survey ProposalReservoir to Min Al Fahal (MAF)• Oil/water/gas wells manifold/gathering station Main pumping station (MPS) MAF tanks
Survey Proposal• Survey backwards from MPS (dehydration tanks)
Gathering Stations (separators) % well heads • Fields declared
– Green (NORM Free)– Yellow (NORM Suspected)– Red (Known NORM)
• Work back as to which geology, depth, water chemistry, E.O.R. programs are likely to produce NORM
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