ENS 51398
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ENS Event | |
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07:00 Sep 16, 2015 | |
Title | High Pressure Coolant Injection System Declared Inoperable Due to Valve Stem Packing Steam Leak |
Event Description | At 0200 CDT on 9/16/2015, the High Pressure Coolant Injection (HPCI) System was manually isolated to stop a steam leak from the stem packing of the HPCI Steam Supply Valve 2-FCV-073-0016. The leak occurred following performance of 2-SR-3.6.1.3.5 (HPCI) HPCI System Motor Operated Valve Operability, which cycled 2-FCV-073-0016. No Area Radiation Monitoring (ARM) or PCIS Area High Temperature alarms were received and no automatic isolation setpoints were reached. HPCI was declared inoperable per Technical Specification (TS) Limiting Condition for Operation (LCO) 3.5.1 Emergency Core Cooling Systems (ECCS)- Operating, Condition C.
This constitutes an unplanned HPCI system inoperability and requires an 8-hour ENS notification in accordance with 10 CFR 50.72(b)(3)(v)(D), due to the failure of a single train system affecting accident mitigation, and a 60-day written report in accordance with 10 CFR 50.73(a)(2)(v)(D). The NRC resident inspector has been notified. |
Where | |
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Browns Ferry ![]() Alabama (NRC Region 2) | |
Reporting | |
10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident | |
LER: | 05000260/LER-2015-002 |
Time - Person (Reporting Time:+3.17 h0.132 days <br />0.0189 weeks <br />0.00434 months <br />) | |
Opened: | Todd Christensen 10:10 Sep 16, 2015 |
NRC Officer: | Howie Crouch |
Last Updated: | Sep 16, 2015 |
51398 - NRC Website
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Unit 2 | |
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Reactor critical | Critical |
Scram | No |
Before | Power Operation (100 %) |
After | Power Operation (100 %) |
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