Naturally Occurring Radioactive Material Supervisors Training Course Version
- Slides: 47
Naturally Occurring Radioactive Material Supervisors Training Course Version One 2006 1
Course Administration Ø Ø § Ø § Emergency procedures Facilities: first aid, prayers, refreshments, toilet Documentation: course roster, HSE passport Restrictions: smoking, telephones and pagers Introduction: name, company, position and expectations of the course Version One 2006 2
Course Aims Ø Aims of the course are to provide knowledge and understanding of: § basic radiation (NORM) theory § where NORM can be found § personal hygiene and health risks § system of work procedures to control NORM risk and use and checking of PPE Version One 2006 3
Course Aims (Continued) § § § § PDO procedures roles of personnel supervision of NORM jobs as agreed by CRFP duties and actions of RPT use of monitoring equipment by RPT radiation and contamination level assessments registering and recording NORM survey results Version One 2006 4
Course Objectives Ø On completion of the course attendees will be able to: § explain NORM theory § describe where NORM can be found § explain NORM health, environment and reputation risks § describe NORM control measures § describe RPT actions in undertaking a contamination survey § interpret information recorded and reported of NORM in the field § complete supervisors section of NORM survey report form Version One 2006 5
Radiation Sources in PDO Radiation sources Industrial radiography Installed gauges Portable gauging equipment Well logging Radio tracers NORM Version One 2006 6
What is NORM? Naturally Occurring Radioactive Material Version One 2006 7
Radiation Ø NORM decay and emit: § Alpha particles (α) § Beta particles (β) and § Gamma rays (y) Version One 2006 8
Radiation Alpha Beta Gamma Version One 2006 9
Enclosed Equipment Gamma radiation § High energy § Can penetrate piping where scales deposit § External Risk Version One 2006 10
Open Equipment Ø Alpha / Beta particles: § inhaled § ingested § absorbed into cuts § Internal risk Version One 2006 11
Health Risk Ø NORM radiation § Low gamma radiation risk § Major risk inhalation and ingestion of scale/debris § Alpha / Beta particles can damage internal cells § May lead to lung or bone cancer Version One 2006 12
Where to Find NORM v Fixed Scales v Sludge v Salts v Assume all fluid bearing systems are NORM contaminated until proven otherwise v If in doubt ask the PDO Production Supervisor Version One 2006 13
Scale Tubulars Valves Version One 2006 14
Sludge stored in pits Sludge mixed with sand land farmed Version One 2006 15
Evaporation Pond Version One 2006 16
Separators and Tanks Version One 2006 17
Water Leaks Version One 2006 18
Job Types at Risk Ø § § § Who is exposed: production operatives production maintenance tank, vessel, separator cleaning hoist and rig crews pigging crews sludge farm operatives Version One 2006 19
NORM Specification Ø SP 1170 Management of NORM § system of work (PTW) § exposure limits § monitoring § transportation § storage § PPE § Templates / Records Version One 2006 20
Managing NORM Risk Ø NORM management flow chart: PTW Vessel inspection Identify Before entry monitor NORM Assess Is external radiation and or surface contamination greater than clean area level Normal Working procedure *Classify area • Continue monitoring * Implement appropriate safe working procedures Compile NORM Monitoring data Control & Recovery Is there solid waste Specific activity analysis Version One 2006 All solid waste stored in labelled drums/containers 21
Permit to Work Ø Permit to Work: § When opening production equipment § Request NORM Survey as part of the Pt. W OR § Verify surveys or maps that facility is: § NORM free, § NORM Suspected § NORM Contaminated § Check with Production Operator Version One 2006 22
Fahud NORM Map SHIBKAN FAHUD WEST NATIH B C A NAHAD. B. S D E NORM Contamination: NORM Suspected: NORM Free: NORM Contamination: > 5 CPS abg ( > 10 cps) NORM Suspected: Minor NORM ( < 10 cps) NORM Free: Background levels (2 - 3 cps) Version One 2006 23
NORM Survey Version One 2006 24
NORM Guidelines Ø Ø § § § Procedures for specific NORM tasks: “How to do” documents tank and separator cleaning pigging transportation sampling well workovers / servicing Others available Version One 2006 26
Controlling NORM v Plan the job v Conduct tool box talk v Create a supervised area v Follow procedures / guidelines v Provide appropriate PPE v Prevent airborne dust v Provide polyethylene lining and containers v Contain debris in one area v Encapsulate equipment at open ends Version One 2006 27
NORM PPE Ø § § § Appropriate PPE: P 3 disposable respirator disposable coveralls impermeable rubber gloves safety glasses steelcap boots § Note: PPE should washed or wiped clean and disposed as normal § Do not send to Bahja Version One 2006 28
Personal Hygiene Ø § § If working with NORM equipment: do not eat or drink in cordoned area do not apply barrier cream or lip balm Dress cuts and abrasions Wash hands and face before eating, drinking or smoking Version One 2006 29
NORM Monitoring Conducted by trained personnel § Before commencement of work § Using NORM Record Form § Attach NORM Record to Pt. W Version One 2006 30
NORM Meters PDO Assets must have: 1. Mini 900 with 44 A probe 2. Mini 900 with EP 15 Probe 3. Graetz X 5 Cex Dose Meter Specific Operations e. g. hoists Version One 2006 31
Mini 900 with 44 A probe Ø § § Basic contamination Meter Reads in counts per second (cps) Tests + / - for NORM Sensitive for gamma radiation Used to measure external contamination before opening § Used to measure internally once opened § Not intrinsically safe Version One 2006 32
Mini 900 with EP 15 probe Ø Contamination Meter § reads in counts per second (cps) § Detects Alpha (α) and Beta (β) § Used to measure external contamination § e. g. esp’s, tubulars and LNG equipment § Fragile, not intrinsically safe Version One 2006 33
Graetz Dose Meter Ø Reads in microsieverts/hr (µSv/hr) § Used if Mini 900/44 A > 100 cps § E. g. tank & separator cleaning § If dose > 2. 5 u. Sv/hr = Supervised Area § If dose > 7. 5 u. Sv/hr = Controlled Area § Intrinsically safe Version One 2006 34
Contamination Monitoring Ø § § § Mini 900 with 44 A prove background radiation 3 - 4 counts per second (cps) readings > 5 cps above background = NORM implement NORM Procedures (Guidelines) Version One 2006 35
Contamination Monitoring Ø Tells us if NORM is there (Yes or No) < 5 cps abg No NORM No controls > 5 cps abg NORM PPE if opening > 100 cps NORM PPE if opening Monitor dose Version One 2006 36
Dose § Dose - signifies the harmfulness of the radiation § Higher dose = greater health risk < 1 u. Sv/hr > 1 u. Sv/hr Minimal external risk Risk increases > 2. 5 u. Sv/hr Supervised Areas > 7. 5 u. Sv/hr Controlled Areas Version One 2006 Keep records Restrict access Only radiation workers in these areas 37
Labelling & Placarding Yellow/black stickers Tubulars, pumps, pipes NORM Placards • Wells • Manifolds • Areas Version One 2006 38
Storage Ø Wrap in heavy duty plastic (0. 2 mm) § Use NORM Tape • Drum sludge or pigging debris Version One 2006 39
Storage • End cap all tubulars • Plastic wrap exterior contaminated tubulars Version One 2006 40
Completing NORM Work Ø § § § On work completion: complete record form send sample for laboratory analysis decontaminate everyone leaving site check site for contamination take down barriers Version One 2006 41
Recording NORM Data Ø § § § SP 1170 - Appendix A job details monitoring details (cps) or (µSv/hr) supervised & controlled areas exposure log (µSv/hr) § Signatures § If daily dose exposure > 8 µSv per day keep permanent record § perform risk assessment on Job type Version One 2006 42
Transport of NORM Originator completes: • Appendix B of SP 1170 • Despatch Section of Appendix C • Gives Appendix B to Transport Contractor completes: • Appendix C of SP 1170 • Gives Forms to Bahja NORM Yard Operator Version One 2006 43
Transporting NORM Ø Recording NORM: § measure radiation emitted & record findings § identify & label contaminated equipment § create & maintain records § advise asset of results & contaminated equipment § inventory contaminated equipment § transport to PDO Bahja NORM Yard Version One 2006 44
NORM Movements Ø § § § Recording movement: transported as class 7 dangerous good label equipment & placard truck measure drivers exposure dose check vehicle prior to leaving transport to the Bahja NORM Yard provide yard operator with records (Appendix B & C) Version One 2006 45
NORM Training Ø NORM training: § awareness training for all personnel exposed to NORM in the workplace § supervisor training for all personnel responsible for issue of permits to work or supervise workers exposed to NORM Version One 2006 46
NORM Ø Summary: § assume all fluid bearing systems contaminated until proven clean § refer to PDO Production Supervisor to identify NORM areas § follow SP 1170 and SP 1009 § implement NORM guidelines § test ALL systems at first breach and regularly as new surfaces encountered § record all results including zero readings § wear appropriate PPE § transport contaminated material to storage facility Version One 2006 47
Mini 900 with 44 A probe Ø Externally Ø Around bends Ø 5 cps abg = NORM Ø Internally Ø Turbulent areas Ø 5 cps abg = NORM Version One 2006 48
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