ENS 54199
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ENS Event | |
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21:45 Aug 4, 2019 | |
Title | Average Power Range Monitors Declared Inoperable |
Event Description | On August 4, 2019 at 1745 [EDT], Reactor Recirculation Pump (RRP) 11 tripped. The cause for the trip is under investigation.
Following the RRP trip, the Average Power Range Monitors (APRMs) flow bias trips are inoperable due to reverse flow through RRP 11. The APRMs were restored to operable on August 4, 2019 at 1807, when the RRP 11 Discharge Blocking Valve was closed. This 8-hour non-emergency report is being made based upon requirements of 10CFR50.72(b)(3)(v)(A) which states: 'Licensee shall notify the NRC of any event or condition that at the time of discovery could have prevented the fulfillment of the safety function of structures or systems that are needed to: (A) Shut down the reactor and maintain it in a safe shutdown condition.' The licensee has notified the NRC Resident Inspector. |
Where | |
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Nine Mile Point New York (NRC Region 1) | |
Reporting | |
10 CFR 50.72(b)(3)(v)(A), Loss of Safety Function - Shutdown the Reactor | |
Time - Person (Reporting Time:+3.72 h0.155 days <br />0.0221 weeks <br />0.0051 months <br />) | |
Opened: | Joe Blakeley 01:28 Aug 5, 2019 |
NRC Officer: | Howie Crouch |
Last Updated: | Aug 5, 2019 |
54199 - NRC Website
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Unit 1 | |
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Reactor critical | Critical |
Scram | No |
Before | Power Operation (100 %) |
After | Power Operation (89 %) |
WEEKMONTHYEARENS 568102023-10-23T00:48:00023 October 2023 00:48:00
[Table view]10 CFR 50.72(b)(3)(v)(A), Loss of Safety Function - Shutdown the Reactor Average Power Range Monitors Declared Inoperable ENS 551372021-03-13T02:02:00013 March 2021 02:02:00 10 CFR 50.72(b)(3)(v)(A), Loss of Safety Function - Shutdown the Reactor Reactor Recirculation Pump Trip ENS 541992019-08-04T21:45:0004 August 2019 21:45:00 10 CFR 50.72(b)(3)(v)(A), Loss of Safety Function - Shutdown the Reactor Average Power Range Monitors Declared Inoperable 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 402172003-10-03T01:00:0003 October 2003 01:00:00 10 CFR 50.72(b)(3)(v)(A), Loss of Safety Function - Shutdown the Reactor Loss of Safe Shutdown Capability Due to All Oprm Channels Being Declared Inoperable. 2023-10-23T00:48:00 | |
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