05000443/FIN-2014005-03
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Finding | |
|---|---|
| Title | Failure to Periodically Calibrate REM-500 Neutron Survey Instruments |
| Description | The inspectors identified a Green NCV of TS 6.7.1.a, Procedures and Programs, because NextEra failed to conduct appropriate periodic calibration of neutron survey instruments. Specifically, since 1996, NextEra assumed that an operability check of certain neutron survey instruments using an internal alpha check source would provide a calibration equivalent to that performed to a traceable neutron source of a known neutron flux, contrary to the periodic calibration frequency requirements specified in the Seabrook Station Radiation Protection Manual. NextEras immediate corrective actions included capturing this issue in its CAP (AR 01969397), calibrating all of the neutron survey instruments in question, and revising the neutron survey instrument operating procedure to require annual calibrations. This performance deficiency was determined to be more than minor because it adversely affected the Occupational Radiation Safety Cornerstone to ensure the adequate protection of the worker from radiation exposure. Additionally, it was similar to example 6.b in IMC 0612, Appendix E, Examples of Minor Issues, which states that the performance deficiency is more than minor if a radiation protection instrument was not calibrated properly, and when recalibrated the as-found condition of the instrument was not within acceptance criteria for calibration and the accuracy was non-conservative. The issue was evaluated in accordance with IMC 0609, Appendix C, "Occupational Radiation Safety Significance Determination Process," and determined to be of very low safety significance (Green) since it was not an as low as is reasonably achievable (ALARA) issue and did not involve an overexposure or a potential overexposure and it did not affect any significant neutron exposures of plant personnel. The inspectors determined there was no cross-cutting aspect associated with this finding since it was not representative of current NextEra performance. Specifically, in accordance with IMC 0612, the causal factors associated with this finding occurred outside the nominal three-year period of consideration and were not considered representative of present performance. |
| Site: | Seabrook  |
|---|---|
| Report | IR 05000443/2014005 Section 2RS5 |
| Date counted | Dec 31, 2014 (2014Q4) |
| Type: | NCV: Green |
| cornerstone | Or Safety |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71124.05 |
| Inspectors (proximate) | C Newport D Silk G Dentel P Cataldo R Barkley T O'Hara W Cook B Dionne |
| Violation of: | Technical Specification - Procedures Technical Specification |
| INPO aspect | |
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Finding - Seabrook - IR 05000443/2014005 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Seabrook) @ 2014Q4
Self-Identified List (Seabrook)
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