05000286/FIN-2011003-02
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Finding | |
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| Title | Licensee-Identified Violation |
| Description | TS 3.3.4 requires that the remote shutdown function of RCS cold leg temperature shall be operable, which, in part, is specifically met if wide range instrument TE413B is operable. Contrary to this requirement, on March 2, 2010, Entergy personnel determined that the switch used to transfer the cold leg temperature loop from the Control Room to the remote shutdown cabinet had evidence of high resistance on the contacts, and therefore rendered the instrument inoperable. Entergy concluded that the exact period of time the cold let temperature loop TE-413B was inoperable could not be determined, but TE-413B had exceeded its TS allowed outage time of 30 days. Entergy subsequently performed a surveillance test to demonstrate the current operability of the instrument and performed a revision to the surveillance procedure to provide adequate steps for performing Rli calibrations, switch contact resistance checks, and proper as found criteria. Entergy documented this issue in the corrective action program for resolution as CR-IP3-2009-04823. A Region I Senior Reactor Analyst evaluated the significance of the finding using IMe 0609, Appendix F, Fire Protection Significance Determination Process, and qualitatively determined that the finding screened as very low safety significance (Green). The basis for screening this post-fire safe shutdown finding as Green is that the inoperability of TE-413B, used for monitoring the condition of the reactor from outside the control room, could be readily compensated for by operators via verification of control rod position (maintenance of shutdown margin) and reactor temperature and pressure (negative temperature/pressure reactivity coefficients) until the operability of TE-413B could be restored. This finding is assigned a moderate degradation rating based upon Appendix F, Attachment 2, Table A.2.3 - Guidance for Ranking an Observed SSD Degradation Finding. Specifically, the SRA concluded that the inoperable TE-413B instrument equates to equipment or tools not staged or located as specified by procedures. This moderate degradation rating screens the finding to Green because it only affects the ability to reach and maintain cold shutdown conditions (Task 1.3.1: Qualitative Screening for All Finding Categories). |
| Site: | Indian Point  |
|---|---|
| Report | IR 05000286/2011003 Section 4OA7 |
| Date counted | Jun 30, 2011 (2011Q2) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | C Newport J Lilliendahl K Mangan M Halter P Cataldo |
| INPO aspect | |
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Finding - Indian Point - IR 05000286/2011003 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Indian Point) @ 2011Q2
Self-Identified List (Indian Point)
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