IAEA International Atomic Energy Agency Gauges and well logging
Basic Safety Requirements Day 6 Lecture 4
Slide 2
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
Slide 3
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
Slide 4
IAEA Design Features Design features include: shielding
provided by the source housing source shutter features to prevent
access 4
Slide 5
IAEA Source housing 5
Slide 6
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
Slide 7
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
Slide 8
IAEA Prevention of access Physical barriers 8
Slide 9
IAEA Prevention of access Shielded panels 9
Slide 10
IAEA Prevention of access shielded panels 10
Slide 11
IAEA Prevention of access Positioning of source and detector
11
Slide 12
IAEA Prevention of access Positioning of source and detector
12
Slide 13
IAEA Safety and warning systems l Safety and warning systems
include: n shutter condition warning lights n signs and notices
13
Slide 14
IAEA Shutter condition warning lights 14
Slide 15
IAEA Signs and notices 15
Slide 16
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
Slide 17
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
Slide 18
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
Slide 19
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
Slide 20
IAEA Leak testing l Sealed sources should be periodically
tested for leakage l Records of test should be kept 20
Slide 21
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
Slide 22
IAEA Security of portable gauges Constant surveillance when in
use 22
Slide 23
IAEA Security of portable gauges l Suitable gauge store on each
site 23
Slide 24
IAEA Security of portable gauges l Adequate surveillance during
transport 24
Slide 25
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
Slide 26
IAEA Security of fixed gauges WARNING Contact GaugeTech before
removing! WARNING Contact GaugeTech before removing! 26
Slide 27
IAEA Security of well logging materials Downhole storage Locked
above ground storage 27
Slide 28
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
Slide 29
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
Slide 30
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
Slide 31
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
Slide 32
IAEA Well logging Sealed source handling Loading source into
transport container Removing source from the transport container
32
Slide 33
IAEA Installing sealed source into well logging tool Well
logging Sealed source handling Tightening sealed source to a
specified torque 33
Slide 34
IAEA Select proper source cap Installing source cap to secure
source and tightening to a specified torque Well logging Sealed
source handling 34
Slide 35
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