05000317/FIN-2009006-02
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Finding | |
|---|---|
| Title | Inadequate Design Control for 125 Vdc System |
| Description | The team identified a finding of very low safety significance involving a non-cited violation of 10 CFR 50, Appendix B, Criterion III, Design Control, in that, Constellation did not assure that the design basis was correctly translated into specifications, drawings, procedures, and instructions. Specifically, Constellation did not assure that design inputs were appropriate, calculations were performed correctly, and design changes were incorporated into the 125 Vdc system design documents. In response, Constellation entered the issue into the corrective action program and determined that the station batteries were operable based upon battery age and capacity, and an assessment of the specific deficiencies. This finding is more than minor because it is associated with the design control attribute of the Mitigating Systems Cornerstone and affected the cornerstone objective of ensuring the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. The team determined the finding was of very low safety significance (Green) because it was a design or qualification deficiency that did not result in a loss of the 125 Vdc system operability or functionality. This finding has a cross-cutting aspect in the area of Human Performance, Resources Component, because Constellation did not ensure that complete, accurate, and up-todate design documentation was available and adequate to assure nuclear safety. Specifically, Constellation did not assure that design inputs were appropriate, calculations were done correctly, and design changes were incorporated into the 125 Vdc system design documents. (IMC 0305, Aspect H.2(c)) |
| Site: | Calvert Cliffs  |
|---|---|
| Report | IR 05000317/2009006 Section 1R21 |
| Date counted | Sep 30, 2009 (2009Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.21 |
| Inspectors (proximate) | J Lilliendahl S Pindale C Baron G Skinner F Arner L Doerflein M Halter |
| CCA | H.7, Documentation |
| INPO aspect | WP.3 |
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Finding - Calvert Cliffs - IR 05000317/2009006 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Calvert Cliffs) @ 2009Q3
Self-Identified List (Calvert Cliffs)
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