ENS 46979
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ENS Event | |
|---|---|
15:00 Jun 23, 2011 | |
| Title | High Pressure Coolant Injection System Declared Inoperable |
| Event Description | During performance of scheduled surveillance testing, the Unit 1 High Pressure Coolant Injection (HPCI) turbine control valve did not fully close when the system was secured. The HPCI system was removed from service and the control valve was inspected. The inspection identified a broken steam supply valve internal to the control valve. This condition would have prevented HPCI from fulfilling its safety function and is being reported for the inability of a single train system to mitigate the consequences of an accident. |
| Where | |
|---|---|
Limerick  Pennsylvania (NRC Region 1) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident | |
| Time - Person (Reporting Time:+2.65 h0.11 days <br />0.0158 weeks <br />0.00363 months <br />) | |
| Opened: | John Weissinger 17:39 Jun 23, 2011 |
| NRC Officer: | Donald Norwood |
| Last Updated: | Jun 23, 2011 |
| 46979 - NRC Website | |
Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
Limerick with 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident | |
WEEKMONTHYEARENS 561632022-10-14T14:07:00014 October 2022 14:07:00
[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 554842021-09-23T18:43:00023 September 2021 18:43:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident High Pressure Coolant Injection System Declared Inoperable ENS 550002020-11-16T10:15:00016 November 2020 10:15:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident High Pressure Coolant Injection Inoperable ENS 533412018-04-17T14:30:00017 April 2018 14:30:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident High Pressure Coolant Injection System Declared Inoperable ENS 531082017-12-08T18:10:0008 December 2017 18:10:00 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 a Leaking Check Valve ENS 528742017-07-27T17:15:00027 July 2017 17:15:00 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 513682015-09-03T23:01:0003 September 2015 23:01:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident High Pressure Coolant Injection (Hpci) Declared Inoperable ENS 492392013-08-05T18:56:0005 August 2013 18:56:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident Both Offsite Power Sources Inoperable During Undervoltage Testing ENS 488372013-03-20T18:47:00020 March 2013 18:47:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident High Pressure Coolant Injection (Hpci) Turbine Oil Leak ENS 469792011-06-23T15:00:00023 June 2011 15:00:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident High Pressure Coolant Injection System Declared Inoperable ENS 464742010-12-12T16:28:00012 December 2010 16:28:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident High Pressure Coolant Injection System Unavailable ENS 446232008-11-02T20:50:0002 November 2008 20:50:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident Hpci System Declared Inoperable Due to Controller Failure ENS 436452007-09-17T05:49:00017 September 2007 05:49:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident Hpci Unable to Perform It'S Safety Related Function ENS 434362007-06-21T07:15:00021 June 2007 07:15:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident Hpci Inoperable Due to Quarterly Valve Stroke Test Failure ENS 429072006-10-15T12:46:00015 October 2006 12:46:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident Hpci Inoperable ENS 428832006-10-07T10:57:0007 October 2006 10:57:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident Hpci Declared Inoperable ENS 415402005-03-28T22:38:00028 March 2005 22:38:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident High Pressure Coolant Injection Temporarily Inoperable ENS 406002004-03-19T19:08:00019 March 2004 19:08:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident Hpci System Declared Inoperable at Limerick 1 Due to a Broken Hand Switch 2022-10-14T14:07:00 | |
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