ENS 49029
ENS Event | |
|---|---|
16:15 May 14, 2013 | |
| Title | High Steam Flow Isolation Capability Identified as Non-Functional |
| Event Description | Emergency Cooling Loop 11 High Steam Flow Isolation capability not functional due to inadequate water level in differential pressure transmitter reference legs.
Emergency Cooling Loop 11 High Steam Flow transmitter for channel 11 alarmed due to gross failure at 0840 hours0.00972 days <br />0.233 hours <br />0.00139 weeks <br />3.1962e-4 months <br /> [EDT] on May 14, 2013. At 1154 hours0.0134 days <br />0.321 hours <br />0.00191 weeks <br />4.39097e-4 months <br /> channel 12 Emergency Cooling Loop 11 High Steam Flow transmitter experienced a gross failure. With both transmitters failed, the isolation capability of Emergency Condenser Loop 11 on high steam flow is not available. At 1215 hours0.0141 days <br />0.338 hours <br />0.00201 weeks <br />4.623075e-4 months <br />, a manual isolation of Emergency Cooling Loop 11 was initiated fulfilling the safety function. Subsequent troubleshooting has revealed that the reference legs of the differential pressure transmitters for high steam flow were not filled properly. This is an 8 hour9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> notification per 10 CFR 50.72(b)(3)(v) for a condition could have prevented the mitigation of the consequences of an accident. The licensee notified the NRC Resident Inspector and will notify the State of New York. |
| Where | |
|---|---|
Nine Mile Point  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: | 05000220/LER-2013-001 |
| Time - Person (Reporting Time:+1.08 h0.045 days <br />0.00643 weeks <br />0.00148 months <br />) | |
| Opened: | Daniel Coleman 17:20 May 14, 2013 |
| NRC Officer: | Pete Snyder |
| Last Updated: | May 14, 2013 |
| 49029 - NRC Website | |
Nine Mile Point with 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident | |
WEEKMONTHYEARENS 546922020-05-03T21:50:0003 May 2020 21:50:00
[Table view]10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident Main Control Room Air Treatment System Inoperable ENS 543642019-11-01T07:16:0001 November 2019 07:16:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident High Pressure Core Spray (Hpcs) System Inoperable ENS 502962014-07-22T17:43:00022 July 2014 17:43:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident Diesel Generator for High Pressure Core Spray Declared Inoperable During Surveillance Testing ENS 498592014-02-27T08:30:00027 February 2014 08:30:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident High Pressure Core Spray (Hpcs) System Declared Inoperable ENS 490292013-05-14T16:15:00014 May 2013 16:15:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident High Steam Flow Isolation Capability Identified as Non-Functional ENS 487942013-02-28T18:19:00028 February 2013 18:19:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident High Pressure Core Spray Pump Failure ENS 486962013-01-23T20:16:00023 January 2013 20:16:00 10 CFR 50.72(b)(3)(v)(A), Loss of Safety Function - Shutdown the Reactor, 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident Concurrent Loss of High Pressure Reactor Makeup Systems Capability ENS 479672012-05-25T17:22:00025 May 2012 17:22:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident De-Energization of Both Divisions of Rhr Suction Line Primary Containment Isolations Valves During Testing ENS 452842009-08-23T21:50:00023 August 2009 21:50:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident Unplanned Inoperability of the High Pressure Core Spray System ENS 442062008-05-13T12:25:00013 May 2008 12:25:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident, 10 CFR 50.72(a)(1)(i), Emergency Class Declaration, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Unusual Event Declared Due to Loss of Offsite Power ENS 409202004-08-03T14:46:0003 August 2004 14:46:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident High Pressure Core Spray Rendered Inoperable Due to Faulty Test Equipment ENS 405062004-02-05T18:40:0005 February 2004 18:40:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident Emergency Diesel Generator Ventilation Exhaust Damper Covered with Snow and Ice 2020-05-03T21:50:00 | |