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IAEA International Atomic Energy Agency Gauges and well logging Basic Safety Requirements Day 6 Lecture 4

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IAEA Objectives To give an understanding of the way design features, safety and warning systems, maintenance and safe working procedures contribute to the restriction of exposure 2

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IAEA Content Design features Safety and warning systems Equipment maintenance Leak testing of sources Security and storage of portable equipment Safe working procedures Source handling 3

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IAEA Design Features Design features include: shielding provided by the source housing source shutter features to prevent access 4

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IAEA Source housing 5

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IAEA Source shutter l Rotating or sliding metal device to shield primary beam when not in use l may be manually or electrically operated 6

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IAEA Prevention of access Prevention of access can be achieved by: physical barriers shielded panels close positioning of source housing and detector interlocked access gates 7

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IAEA Prevention of access Physical barriers 8

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IAEA Prevention of access Shielded panels 9

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IAEA Prevention of access shielded panels 10

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IAEA Prevention of access Positioning of source and detector 11

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IAEA Prevention of access Positioning of source and detector 12

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IAEA Safety and warning systems l Safety and warning systems include: n shutter condition warning lights n signs and notices 13

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IAEA Shutter condition warning lights 14

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IAEA Signs and notices 15

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IAEA Equipment maintenance l Regular inspection and maintenance necessary to: n ensure smooth operation of source shutter n check general condition of gauge n check legibility of warning notices n check operation of any interlocks or warning lights n ensure that other equipment, such as transport case, is in good condition 16

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IAEA Equipment maintenance Portable gauges l Checking that source has retracted properly l Cleaning of gauge and source aperture l Condition of transport case 17

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IAEA Equipment maintenance Fixed gauges Routine Maintenance and Lubrication Safety Checklist RPO Authorization Maintenance Procedures Survey Meter Dosimetry? survey meter dosimeter gauge disassembled Manufacturers Instructions Approved Supplies Training or supervison Safety Checklist Non-Routine Maintenance and Lubrication 18

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IAEA Equipment Maintenance Well logging Safety Checklist Survey Meter Dosimetry Procedures for removing O rings Jigs, remote tools Remote Tool Sealed Source Dosimeter Survey Meter Jig or Support O ring 19

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IAEA Leak testing l Sealed sources should be periodically tested for leakage l Records of test should be kept 20

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IAEA Security and storage of portable equipment Consider security of fixed gauges Consider security and storage of: portable gauges fixed gauges used on temporary sites 21

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IAEA Security of portable gauges Constant surveillance when in use 22

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IAEA Security of portable gauges l Suitable gauge store on each site 23

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IAEA Security of portable gauges l Adequate surveillance during transport 24

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IAEA Security of fixed gauges at temporary jobsites WARNING Contact GaugeTech before removing! Radioactive Material, Special Form, N.O.S. UN2974 DOT Type A At the Job Site During Transportation and Storage 25

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IAEA Security of fixed gauges WARNING Contact GaugeTech before removing! WARNING Contact GaugeTech before removing! 26

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IAEA Security of well logging materials Downhole storage Locked above ground storage 27

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IAEA Elements for Safe Working Procedures Portable gauges l Manufacturer instructions for use l Routine and non-routine maintenance l Instructions for safe use l Radiation monitoring l Access control l Responsibilities l Record keeping l Emergency procedures and contacts l Storage and transportation 28

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IAEA Elements for Safe Working Procedures Fixed gauges l Manufacturer instructions for use l Routine and non-routine maintenance l Radiation monitoring l Access control n Radiation Work Permits for entry to some areas l Responsibilities l Emergency procedures and contacts 29

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IAEA Elements for Safe Working Procedures Well logging l Security during storage and transportation l Receipt and opening of packages l Control and surveillance during use l Source handling procedures l Use of remote handling tools l Radiation monitoring l Access control l Responsibilities 30

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IAEA Elements for Safe Working Procedures Well logging l Record keeping l Inspection and maintenance of equipment l Emergency procedures and contacts n Abandonment procedures n Damaged source procedures 31

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IAEA Well logging Sealed source handling Loading source into transport container Removing source from the transport container 32

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IAEA Installing sealed source into well logging tool Well logging Sealed source handling Tightening sealed source to a specified torque 33

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IAEA Select proper source cap Installing source cap to secure source and tightening to a specified torque Well logging Sealed source handling 34

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IAEA Summary Basic safety requirements to restrict exposure design features safety and warning systems equipment maintenance leak testing of sources security and storage safe working procedures source handling Any questions or comments? 35