21 –23 Feb 2005 NORM Workshop 2005

PDO NORM Management System

Brett Young

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 2005NORM Radiological Survey √ 24372

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

21 –23 Feb 2005 NORM Workshop 2005

Further discussion

1. Does PDO need dedicated Interior based RPS?

2. How do other organisations consistently identify contaminated plant/areas? Do you use a PTW system or other?

3. Are surveys a useful tool? Do you utilise a similar method or other than proposed?