PDO NORM Storage Facilities Ahmed Al-Sabahi Corporate Environmental Advisor

PDO NORM Storage Facilities PDO Has two Storage facilities: Zualayah Storage area Bahja Storage Facility

Storage of Radioactive Materials SP-1170 All NORM contaminated items or materials must be taken to the PDO designated storage site in Zauliyah as soon as reasonably practicable. The NORM storage area must comply with the following: The NORM storage areas must be protected with proper fencing and security so that uncontrolled entry is not possible. There must be proper signage (pictorial and written in English and Arabic) around the fence so that the hazards are understood by everybody. A contour of dose rates for the site shall be available through the supervisor. People who are given access to the site are briefed on the location of hazards. The key for access to the site must only be issued to authorised personnel and must be signed out and back into the custodian’s control. The dose rate outside at the fence of the storage facility shall not exceed 2.5 1 Sv/hr.

Zauliyah Storage Facility In 1994 a pig sample from Hasirah – Zauliyah line was found to have radioactive reading above background level comprehensive survey for Naturally occurring radioactive material (NORM) was conducted in Zauliyah station high contamination reading were observed and materials. This discovery lead to have a NORM storage area in Zauliyah.

What we are storing in Zualiyah Tubulars Contaminated Sludge ( in Drums). X-Mass trees Cables Scrap metals The NORM radioactive material prior to being placed in the storage were cemented and solidified, in thick numbered steel drums and transferred to an enclosed, top open wall (10L*15W*1.5H)

Zauliyah NORM Storage Yard 10” -Zualiyah- Sahmah line 6” Sahmah -Zualiyah line 8” Hasirah -Zualiyah line Drainage pit TANK MAIN GATE Contaminated tubulars- Total number-2675 End capped and parts that are rusted covered with polyethylene Water disposal line NORM Storage Yard

Some of the drums in the Storage

Contaminated tubular from Zauliyah –5

Present NORM Storage Facility AD Hoc facility set up in Zauliya Does not meet required standards or specifications Licensed but threat of license revocation exists due to standards breaches. Increasing quantities have increased dose rate to dangerous levels RAC (Radiation Advisory Committee Approved Setting up permanent facility

NORM DESIGNATED AREA-PDO NORM CONTAMINATION =10 c/s Dose Rate= 0.11-0.29mSv/h RADON in Gas= 66Bq/m3 NORM CONTAMINATION = 0 c/s Dose rate = <0.10mSv/h RADON in Gas = 61 Bq/m3 MAF NORM CONTAMINATION = 400 c/s Dose Rate = <0.33-0.47mSv/h LKH-128L=660 Bq/g LPS-T-2612=260Bq/g LEKHWAIR Mazoon DHULAIMA NORM CONTAMINATION = 20 c/s DOSE RATE = 0.12-0.25mSv/h RADON IN GAS - 66 NORM CONTAMINATION = 60 c/s Dose Rate= 0.22-0.27mSv/h RADON in Gas= 435Bq/m3 NATIH FAHUD YIBAL NORM CONTAMINATION = 0 c/s Dose Rate= <0.12mSv/h RADON in Gas= 407Bq/m3 NORM CONTAMINATION = 0 c/s DOSE RATE = <0.12 mSv/h RADON IN GAS - 86Bq/M3 AL HUWAISAH MUSALLIM SAIH NUHAYDA TAWF DAHM SAIH RAWL G.NORTH NORM CONTAMINATION = 60 c/s Dose Rate= 0.25-0.50mSv/h RADON in Gas= 107Bq/m3 NORM CONTAMINATION = 18c/s DOSE RATE = 0.19-0.25mSv/h RADON IN GAS =317 Bq/M3 MABROUK QALN-ALARM BARIK AL-GHUBARA NORM CONTAMINATION = 2500 c/s DOSE RATE = 1.99-2.40mSv/h RADON IN GAS -44Bq/M3 ZL-5 =592 Bq/g NORM CONTAMINATION = 0 c/s DOSE RATE = <0.12mSv/h RADON IN GAS = 260Bq/m3 ZAULIYAH HASIRAH ANZAUZ NORM CONTAMINATION = 0 c/s DOSE RATE = <0.12mSv/h RADON IN GAS= 47Bq/m3 NORM CONTAMINATION = 20 c/s DOSE RATE = 0.15-0.20mSv/h WAFRA WAFRA-10 = 1110Bq/g HASIRAH- ZAULIYAH LINE-CONTAMINATED LINE = 60 c/s SUWAIHAT SAYYALA BAHJA NORM CONTAMINATION = 20 c/s DOSE RATE = 0.12-0.15mSv/h RADON IN GAS = 43Bq/m3 NORM CONTAMINATION = 60 c/s DOSE RATE = 0.15-0.18mSv/h NORM CONTAMINATION \ = 15 c/s DOSE RATE = 0.12mSv/h RADON IN GAS = 46Bq/m3 SADAD MUKHAIZNA NIMR NORM CONTAMINATION = 30 c/s Dose Rate= <0.18-0.24mSv/h RADON in Gas = 53 Bq/m3 NORM CONTAMINATION = 0 c/s DOSE RATE = <0.12 mSv/h RADON in Gas= 430Bq/m3 AMIN SIMSIM NORM CONTAMINATION = 20 c/s Dose Rate = 0.12-0.25mSv/h RADON in Gas - N/D AMAL MARMUL AL BURJ RAHAB THULEILAT QAHARIR LE G E N D Specifications. NORM contamination- reading 3 times the back-ground on the contamination meter is a NORM trace or NORM suspect area.- NORM area - Area confirmed to have materials with quantitative radioactive level of more than 100 Bq/g Dose rate-Accepted limit is below 2.5mSv/h PPE should be used when dose rate is above 7.5mSv/h. Contamination reading are back-ground subtracted Note-NORM traces area,procedures must be followed c/s-counts/seconds Bq/g -Becquerel/ grams Bq/m3-Becquel/ cubic meter Sv/h - Sievart/hour NORM AREA NORM AREA NORM TRACES NORM TRACES Oil pi pel in e Gas pi pe lin e LAST UP DATED ON 24/02/99 - Compiled and prepared by RASHID AL-ZAKWANI-TKL2B Interior-Radiation-Focal-point

Issues Due to Lack of NORM Storage Many Tanks cleaning delayed Mounting Inventory of NORM materials Non compliance to HSE-MS or ISO-14001 Potentially serious HSE risks

Present NORM Inventory Expected drums = 7000-8000 Down hole equipments = 40 – 50 pieces (about 4 meters length) Tubing’s (3/4”) = 20000 pieces. Pipes = 50 pieces (different sizes and lengths). X- Mass trees = 10 pieces. Cables ( down hole work) = 3000m Suspected NORM Sludge = 1500m³

NORM Strategy Storage Facilities in Bahja as per SP-1170 MRME constructing NORM disposal facility in 2 years Operation of facility to be managed by Waste Management Contractor

Storage Facility Details Total Area – 400m x 400m All the area should be lined Temporary storage for the incoming sludge Toilets Equipment & PPE Store Drummed sludge only - (50 m x 25 m x 0.4 m area) Contaminated equipment (tubulars, esp’s) - (50 m x 25 m area) Scrap material/metals (50 m x 25 m area) Dedicated concrete pits for storage of liquid/bulk sludge from tanks (100m*100m*1m)

NORM facility 400 m Entrance * Concrete pad Rest Room & Toilet 400 m 100 m x 50 m Rest Room & Toilet 400 m gate 2 Pits Sludge Storage 100m*10m*1m depth Source Pit Tublars 50m x 25m Scrap metal 50m x 25m Drum storage 50m x 25m Note:- * Not decided yet due to change in design basis. CSM32 to advise

Project Phases Phase 1 project started in June & was completed in August 2004 as per agreed plan. Preparation of the site Fencing of the site Phase 2 under construction and target completion Dec.’04. Two HDPE lined pits being built Tubular Area Metal Area Drum Yard Source Pit Toilets Phase3 will be mid June 2005 and it will include for additional 4 pits & decontamination area Initiate development of decontamination facility Determine and agree on long term disposal options for NORM Tender out the design for the decontamination facility

1st PIT

2nd PIT

TUBALAR AREA

METAL AREA

DRUMS YARD

SOURCE PIT

Rest Room