1. Technical justifications for accreditation
of internal body contamination equipment at EDF NPP
Michèle GONIN (MD)
Bernard JEANNIN
Yves GARCIER
Nuclear Production Department

2. 19 NPPs
19 occupational
health services
39 whole body counters
For internal exposition
monitoring

3. Internal exposure monitoring program
High energy in vivo monitoring (range from 100 keV to 3 MeV)
shielding
2 NaI detectors
Data processing and analysis
Display and data storage
Whole body counters

4. To assure the quality of the tests and/or calibration results
Accreditation requirements according to the international standard ISO/CEI 17025
General requirements for the competence of testing and calibration laboratories
Management system for quality
Plan
Customer’s request
Quality policy
Statement Do
Objectives
Regulations
Management
reviews
Complaints
Act
Corrective
and preventive actions
Indicators
Analysis
of data
Non conforming
Tests results
Internal
audits
Check
To assure the quality of the tests and/or calibration results

5. Accreditation requirements according to the international standard ISO/CEI 17025
General requirements for the competence of testing and calibration laboratories
Management system for technical operations
Tests and calibration methods
verification
of methods
Characterisation of equipment
Calibration and measurement traceability to SI units
Quality control procedures
Interlaboratory comparisons
Estimate
of uncertainty of measurement
Qualification of operators : education and training programs

6. The national project EDF national technical requirements :
Specify tests for evaluating technical performance secifications
Establishment of programs and operating procedures
GOLFECH
NPP
PALUEL NPP
2 reference whole body counters :
evaluate technical performances
Test programs and operating procedures
37 Whole Body Counters
19 anthropogammametric measurements units
Are in operation at occupational healths services

7. Efficiency calibration and comparisons
Requirement =
Traceability to the SI units
Primary reference phantoms « IGOR »
Radioactive sources
Reference values of efficiency
« true value of activity »

8. IGOR phantom « primary phantom »

9. Efficiency calibration and comparisons
Traceability to the SI units
Calibration phantoms « Canberra »
Radioactive sources
Reference Values of efficiency
To be compared to measured values
« systematic error »

10. Canberra phantom « Calibration Phantom »

11. Comparison of calibration results between primary and calibration phantoms
Cs-137
Co-60
Systematic error  5 %

12. Comparison efficiency values among equipment tests results
Comparison efficiency values between equipments
Bias  4 to 10%
Source 1
Ba-133
Cs-137
Co-60
Source 2
Y-88
Y-88

13. Technical performance
Linearity : effective range of measurement
100 kBq (Cs-137)
58 kBq (Co-60)

14. Technical performance
Maximum count rate : c/s (source out phantom)
c/s (source in phantom to be verified)
0,9
c/s

15. Conclusion Accreditation program for internal dosimetry achieves :
                           
                           
Accreditation program for internal dosimetry achieves :
High quality of results
Validation the performance of equipment
Increased customer’s satisfaction