05000263/FIN-2014002-07
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Finding | |
|---|---|
| Title | Both Secondary Containment Access Doors Briefly Opened Simultaneously |
| Description | On September 18, 2013, while performing the secondary containment airlock door interlock surveillance test, the interlock to the main plenum room did not prevent the opening of both doors to the plenum room airlock (DOOR85 and DOOR86). With the outer door to the main plenum room open, the inner door was able to be opened. The plenum airlock doors were then closed. The operator attempted a second time to verify interlock functionality. This time the inner door was opened, and again the interlock did not prevent the opening of the outer door. The plenum airlock doors were immediately closed. The total time both doors were opened was estimated to be less than 10 seconds. With both doors open, TS SR 3.6.4.1.3 was not met and secondary containment was declared inoperable. Secondary containment was declared operable, after independently verifying that at least one secondary containment access door was closed. Inspectors reviewed the LER and decided that additional information was needed to determine whether a performance deficiency exists for the event. In order to close this Unresolved Item (URI), the inspectors intend to review the sites recently performed evaluation aimed at removing this issue from being counted in the Safety System Functional Failure PI. In addition, the inspectors will factor in any insights from NRRs more generic resolution to industry wide secondary containment issues. |
| Site: | Monticello  |
|---|---|
| Report | IR 05000263/2014002 Section 4OA3 |
| Date counted | Mar 31, 2014 (2014Q1) |
| Type: | URI: |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71153 |
| Inspectors (proximate) | I Hafeez J Beavers J Neurauter K Riemer M Davis M Learn M Mitchell M Ziolkowski P Voss P Zurawski S Bell T Bilikb Josec Zoia J Beavers J Corujo Sandin K Riemer K Walton M Bielby M Jones M Ziolkowski P Voss P Zurawski S Bell A Shaikh |
| INPO aspect | |
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Finding - Monticello - IR 05000263/2014002 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Monticello) @ 2014Q1
Self-Identified List (Monticello)
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