05000293/FIN-2011003-05
Finding | |
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| Title | Failure to Enter Technical Specifications after Loss of Control Rod Indication |
| Description | The inspectors identified a Green NCV of Technical Specification (TS) 3.3.B.
Control Rod Operability,\\\" for Entergy\\\'s failure to enter and perform the actions prescribe in Technical Specifications after losing control rod position indication. Entergy has sinc restored control rod position indication by repairing a failed power supply, Condition repor CR-PNP-2011-0272 was written to address the power supply failure and condition repor CR-PNP-201 1-051 1 was subsequently written to address Entergy\\\'s administration of TSs The inspectors determined that the issue was more than minor because the finding wa associated with the Equipment Performance attribute of the Mitigating Systems cornerston and adversely affected the cornerstone\\\'s objective to ensure the reliability of systems tha respond to events to prevent undesirable consequences (i.e., core damage). Specifically the locations of the control rods were indeterminate which could substantially impac operator\\\'s abilities to implement Emergency Operating Procedures, IMC 0609 \\\"Signi1cance Determination Process,\\\" Attachment 0609.04, \\\"Phase 1-lnitial Screening an Characterization of Findings,\\\" was used to evaluate the significance of the finding Attachment 0609.04, Table 4a, was used to evaluate the impact of the finding on loss o operability or functionality. The inspectors determined that the function of the control rod to add negative reactivity to the core during an event was not affected (SCRAM time an control rod worth were not affected). In addition, alternate means were available t operators to determine control rod position and once the power supply was restored, th control rods were determined to have remained in their original positions. Also, since th finding is not potentially risk significant due to a seismic, flooding or severe weathe initiating event, the finding was determined to be of very low safety significance (Green) The inspectors determined that this issue had a cross-cutting aspect in the Decision Makin component of the Human Performance cross-cutting area. Specifically, Entergy did not us conservative assumptions in decision making and adopt a requirement to demonstrate tha the proposed action is safe in order to proceed rather than a requirement to demonstrat that it is unsafe in order to disprove the action. ln this case, Entergy did not take th conservative approach to enter Technical Specifications when faced with a degrade condition affecting control rod operability H.1(b). (Section 1R15) |
| Site: | Pilgrim |
|---|---|
| Report | IR 05000293/2011003 Section 1R15 |
| Date counted | Sep 30, 2011 (2011Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.15 |
| Inspectors (proximate) | T Burns R Rolph B Smith M Schneider K Dunham |
| CCA | H.14, Conservative Bias |
| INPO aspect | DM.2 |
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Finding - Pilgrim - IR 05000293/2011003 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Pilgrim) @ 2011Q3
Self-Identified List (Pilgrim)
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