05000352/FIN-2008004-01
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Finding | |
|---|---|
| Title | Inadequate Secondary Containment Control Procedure |
| Description | The inspectors identified a NCV of Technical Specification (TS) 6.8.1, Administrative Controls Procedures, because Exelon did not maintain adequate procedures in that Emergency Operating Procedure T-103, Secondary Containment Control, contained an inappropriate high maximum safe operating flooding level for the Unit 2 High Pressure Coolant Injection (HPCI) room. The inspectors determined that this finding was greater than minor because it affected the procedure quality attribute of the mitigating systems cornerstone and adversely affected the cornerstone objective of ensuring availability, reliability, and capability of the HPCI system. Emergency Operating Procedure T-103, Secondary Containment Control, delineated an incorrect value of 40 inches for the Unit 2 HPCI room maximum safe operating (MSO) flooding level. Water at this height in the Unit 2 HPCI room would submerge the auxiliary oil pump and would render the HPCI system inoperable. This finding is of very low safety significance because it did not represent a design or qualification deficiency, a loss of safety system function, an actual loss of safety function of a single train for greater than its TS allowed outage time, or a total loss of any safety function that contributes to external event-initiated core damage sequences. The inspectors determined that this violation has a crosscutting aspect in the area of problem identification and resolution because Limerick did not perform a thorough extent-of-condition review following a 2005 NCV for a similar issue for the Unit 1 RCIC room MSO level (NCV 05000352/2005003-01). Although the station identified that the Unit 2 HPCI auxiliary oil pump and its associated junction box were located below the MSO level during the review, Limerick did not thoroughly evaluate the impact of the elevation difference on the operation of the HPCI system (P.1(c)). (Section 1R06) |
| Site: | Limerick  |
|---|---|
| Report | IR 05000352/2008004 Section 1R06 |
| Date counted | Sep 30, 2008 (2008Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.06 |
| Inspectors (proximate) | E Dipaolo G Meyer R Fuhrmeister S Barr C Bickett N Sieller R Rolph J Tifft M Gotch |
| CCA | P.2, Evaluation |
| INPO aspect | PI.2 |
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Finding - Limerick - IR 05000352/2008004 | ||||||||||||||||||||||||||||||||||||||||||
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Finding List (Limerick) @ 2008Q3
Self-Identified List (Limerick)
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