05000443/FIN-2011003-05
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Finding | |
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| Title | |
| Description | The inspectors identified a non-cited violation (NCV) of Technical Specification (TS) 6.7.1.a that requires that written procedures be established and implemented, including administrative procedures that define authorities and responsibilities for safe operation with respect to operability determinations. Contrary to TS 6.7 .1.a, NextEra identified a degraded condition related to seryice water flow to the B emergency diesel generator (EDG) heat exchanger (HX) on June 28,2011 but did not fully evaluate the reduced flow under all plant conditions as required by NextEra procedure EN-AA-203- 1001. Fouling of the heat exchanger tubes was subsequently identified and mitigated. Seabrook also completed an evaluation of the B EDG service water flow issues and determined that the EDG remained operable. Seabrook entered this performance deficiency into their corrective action program. The performance deficiency was more than rninor because a reasonable doubt of operability existed untilfurther engineering evaluations were completed to demonstrate adequate service water flow to the B EDG HX existed and the B EDG remained functional under design and licensing basis conditions. The finding affected the Mitigating Systems cornerstone objective to ensure the availability, reliability and capability of systems that respond to initiating events in order to prevent core damage. The issue was evaluated using IMC 0609, significance Determination Process (SDP), and was determined to be of very low safety significance (Green) because the finding was not a design or qualification deficiency, did not result in an actual loss of safety function, was not a loss of a barrier function, and was not potentially risk significant for external events. The finding had a cross cutting aspect in the area of problem identification and resolution, P.1(c), because NextEra personnel did not thoroughly assess EDG operability to assure reduced HX SW flow was acceptable under all operating conditions, or assure appropriate corrective actions were timely completed. |
| Site: | Seabrook  |
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| Report | IR 05000443/2011003 Section 1R15 |
| Date counted | Jun 30, 2011 (2011Q2) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.15 |
| Inspectors (proximate) | J Johnson T Burns T Moslak W Raymond A Burritt A Turilin J Deboer |
| CCA | P.2, Evaluation |
| INPO aspect | PI.2 |
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Finding - Seabrook - IR 05000443/2011003 | |||||||||||||||||||||||||||||||||||||||||||
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Finding List (Seabrook) @ 2011Q2
Self-Identified List (Seabrook)
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