ENS 48410
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ENS Event | |
|---|---|
11:00 Oct 16, 2012 | |
| Title | Shutdown Cooling Isolation Capability Lost |
| Event Description | On October 16, 2012, at 0529 EDT, with the reactor in mode 4 and one operable channel for the Residual Heat Removal (RHR) shutdown cooling isolation function, as permitted by TS 3.3.6.1, Operators identified a rising reactor water level indication on instruments associated with the 3A reactor water level reference leg while actual level remained constant. At 0700 EDT, Operators determined this condition rendered the RHR shutdown cooling isolation function inoperable; specifically, an isolation signal for RHR shutdown cooling based on a low reactor water level. In accordance with Tech Spec 3.3.6.1 Required Action J.1, immediate action was initiated to restore isolation capability. RHR shutdown cooling isolation capability was restored at 1040 EDT by changing in-service RHR shutdown cooling systems.
This event could have prevented the fulfillment of a safety function, 10 CFR 50.72(b)(3)(v), at time of discovery to mitigate the consequences of an accident (D). The licensee has notified the NRC Resident Inspector. |
| Where | |
|---|---|
Fitzpatrick  New York (NRC Region 1) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident | |
| LER: | 05000333/LER-2012-006 |
| Time - Person (Reporting Time:+2.27 h0.0946 days <br />0.0135 weeks <br />0.00311 months <br />) | |
| Opened: | Mark Hawes 13:16 Oct 16, 2012 |
| NRC Officer: | Bill Huffman |
| Last Updated: | Oct 16, 2012 |
| 48410 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Not Critical |
| Scram | No |
| Before | Cold Shutdown (0 %) |
| After | Cold Shutdown (0 %) |
FitzPatrick with 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident | |
WEEKMONTHYEARENS 571202024-05-09T20:29:0009 May 2024 20:29:00
[Table view]10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident High Pressure Coolant Injection Inoperable ENS 558712022-04-29T16:51:00029 April 2022 16:51:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident High Pressure Coolant Injection (HPCI) Inoperable ENS 555932021-11-18T22:02:00018 November 2021 22:02:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident High Pressure Coolant Injection Inoperable Due to Isolation Valve Failure to Automatically Open ENS 546572020-04-10T07:00:00010 April 2020 07:00:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident High Pressure Core Injection System Declared Inoperable ENS 526642017-04-04T11:35:0004 April 2017 11:35:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident High Pressure Coolant Injection Inadvertently Isolated During Conduct of Maintenance Surveillance ENS 516132015-12-18T22:22:00018 December 2015 22:22:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident Both Trains of Containment Atmosphere Dilution System Inoperable ENS 509792015-04-12T22:00:00012 April 2015 22:00:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident Temporary Loss of Control Room Envelope Boundary ENS 505322014-10-13T23:35:00013 October 2014 23:35:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident High Pressure Core Injection Degraded Accident Mitigation Capability ENS 502102014-06-18T19:45:00018 June 2014 19:45:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident Loss of Hpci Room Cooling ENS 496602013-12-18T20:00:00018 December 2013 20:00:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident Safety Function for the Hpci Suction Automatic Low Cst Level Swap Over Inoperable ENS 484102012-10-16T11:00:00016 October 2012 11:00:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident Shutdown Cooling Isolation Capability Lost ENS 482702012-09-03T06:25:0003 September 2012 06:25:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident Hpci Inoperable Due to Erroneous Indication on Flow Indicating Controller ENS 482582012-08-30T16:15:00030 August 2012 16:15:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident Hpci Inoperable Due to Failed Pressure Control Valve ENS 463552010-10-23T04:45:00023 October 2010 04:45:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident Hpci Declared Inoperable Due to Power Supply Failure ENS 450082009-04-22T15:21:00022 April 2009 15:21:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident High Pressure Coolant Injection (Hpci) System Inoperable ENS 429642006-11-04T23:10:0004 November 2006 23:10:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident Hpci Inoperable 2024-05-09T20:29:00 | |
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