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 m. Sv/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 T 7402 – – 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/hr Workers 4 hrs per day inside cleaning = 80 μSv/day 80 u. Sv/day x 14 (days) = 1120 μSv/2 weeks inside tank > 1 m. Sv/2 weeks 21 – 23 Feb 2005 NORM Workshop 2005
NORM Radiological Survey 21 – 23 Feb 2005 √ 24372 NORM Workshop 2005
Example of NORM Survey Report 21 – 23 Feb 2005 NORM Workshop 2005 Certificate No: 24372
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 400 m Entrance * Concrete pad Rest Room & Toilet 100 m x 50 m 400 m gate 2 Pits Sludge Storage 100 m*1 m depth Scrap metal 50 m x 25 m 21 – 23 Feb 2005 Drum storage 50 m x 25 m NORM Workshop 2005 Tubulars 50 m x 25 m
NORM Survey Proposal Reservoir 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? 21 – 23 Feb 2005 NORM Workshop 2005
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