Title: The industrial gamma ray inspection: a global approach for a radiation protection issue
1The industrial gamma ray inspection a global
approach for a radiation protection issue
21 - First descriptions of the gamma shooting
- An unknown nightly activity
- A risky activity
- Reliable materials
3A simple work it would be enough to follow
the good procedures
42 The incidents analyse
- A strong media impact
- Different perception from the exposure levels
- Analyses focused on the operators
5 3 - The discovery of a complex activity
6Preparation Carrying out Feedback
- Knowledge of the site organisation - Work file Area plan, Work permit, Doses prediction - Link with other activities (insulation, scaffolding, brushing, shielding, drain circuits - Checking of the area -Take the camera out of the source storage Transportation on site Localization of the valve and location of the welding Information of the workers, supervision of the area Beaconing of the area Film installation Taking into account of the physical environment temperature, lighting, dose rate and accessibility Calculation of the exposure time and test radiography Monitoring of dosimetry Removing, .. Dosimetry ALARA
7The material necessary
83.2 - Variabilities
- Preparation
- Variable Knowledge of NDT according to sites
- More or less detailed files an area plans
- Few or not detailed preliminary visits of the
work area - Preparation a more or less integrated stage, even
very limited
9Variabilities
- Carrying out
- Implantation of the source storage
- Size of the exclusion area (negotiation,
intrusion) - Storage and transportation of the tooling
- Accessibility with the weldings
- Circuits full of water, positioning of the
scaffolding, insulation removing.
10Variabilities
- Realization
- Alternations of waiting and of temporal pressure
- Material incidents
- Physical environments (dosimetry, contamination,
lighting) - Adjustment of the exposure times
- Incidents of development
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133.4 The difficulties
- The transport of the equipment
- Wearing of load
- Risks postures
- Night-work
- To fight against micro-phases of sleep
- The cost of vigilance
- Changes of rhythms
144 - Another glance on incidents
- Vigilance it is work
- Multicausality of the accidents
- From lack of attention to lack of vigilance
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165 Area For Improvement Propositions
- Analyze accidents not to stick only at the
individual level and the carelessness - To limit the factors of degradation of vigilance
to the levels - Individual
- Organisational
- Technique
17Area For Improvement Propositions
- Organisation
- Inequalities of knowledge of trade NDT on the
sites - Unequal conditions of preparation
- Collectives of radiologists burst in perpetual
recombining (which management by the companies?)
- Organisational insulation
18Area For Improvement Propositions
- Technique
- Redundancy of alarms
- The information given by the camera
- Revolutions counters
- Permanent locations of the weldings
- Means of fixing of the nozzles
- Means of handling and storage facilities
- Physical environments (lighting, dosimetry) the
adaptation of the combinations (window, pockets
etc.) Technique
19Area For Improvement Propositions
- Training
- Growing old Population
- Stabilization and transfer of know-how
- Setting in situation and taking into account of
variabilities in the initial formations - Places of training
20Area For Improvement Propositions
- Health and life with work
- a population "exposed" to difficult working
conditions need for taking care of it - An inventory of fixtures as regards health
necessary - Which taking into account of health in daily
- organisation of the companies
- The management of displacements and lodging
- Evaluation of the risks
21Area For Improvement Propositions
22A SFRP COFREND Working group
- Who ?
- Radiation Protection Specialists not only from
NDT Cies, and Nuclear Industry (Oil industry, ) - Authority Body engineers
- NDT managers
- NDT operators
- Transport experts,
- 60 people
23A SFRP COFREND Working group
- What ?
- Applicable regulation
- Feedback experience from incidents, and its use
http//relir.cepn.asso.fr/ - Technical training
- The material and associated equipments
- Dosimetry
- Help for a risk evaluation (Social,
Oranisational, Human approaches) - Self assesment guide
- Distribution of the responsabilities
- Transportation
24PRACTICE IN EDF storage
- Coordination is responsibility for the OPERATOR
- the source is put under the responsibility for
the site
25PRACTICE IN EDF licence of gamma-ray inspection
- A licence of gamma-ray inspection identical on
all the sites - the description of the responsibilities is
specified - To aim at a licence of shooting to engage its
responsibility
26PRACTICE IN EDF The "personal element"
- "engagements of the client of the site
- 8 points to help the radiographer to prepare,
perfom his job, and to support confidence to be
able to identify and treat the variations
27PRACTICE IN EDF The plans of beaconing
- Standardized and filed plans of beaconing
28PRACTICE IN EDF The limitation of the zones of
beaconing
- The more reduced one zone of exclusion is, the
more it is tight
29PRACTICE IN EDF The limitation of the zones of
beaconing
The european practices (EAN WG)
30PRACTICE IN EDF The sound alarm dosimeter
ALL the radiographers wear such dosimeter
31PRACTICE IN EDF The sentinel
- Put in the vicinity of the sources and camera
- Backgroud measurement
- Light switch on when the Dose Rate increases
- Light switch of when the Dose Rate decreases
32PRACTICE IN EDF a specific carriage
33PRACTICE IN EDF a specific beaconing
34Strong messages
- To take care of vigilance
- The risk of an organisational insulation
- A degradation of the working conditions of the
radiologists
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