ENS 41593
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ENS Event | |
|---|---|
08:50 Apr 13, 2005 | |
| Title | During Core Reload Reactor Trip Breakers Opened |
| Event Description | The plant is in Mode 6 (Refueling) and core reload is in progress with the reactor trip breakers open; both trains of solid state protection system are in the operate mode.
While restoring a line up to place the 'D' steam generator on recirculation, a path was opened that allowed the 'B' steam generator to transfer water to the 'D' steam generator. This alignment lowered the 'B' steam generator to its low-low set point level. This initiated a reactor trip signal (RPS). With the reactor trip breakers open and the reactor core reload in progress, no components actuated as a result of the signal. If the emergency feedwater system had been in service, this would have resulted in equipment actuation. This is an 8-hour report per 10 CFR 50.72 (b)(3)(iv)(A). The resident inspector has been notified. |
| Where | |
|---|---|
Seabrook  New Hampshire (NRC Region 1) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(iv)(A), System Actuation | |
| Time - Person (Reporting Time:+1.48 h0.0617 days <br />0.00881 weeks <br />0.00203 months <br />) | |
| Opened: | Paul Dundin 10:19 Apr 13, 2005 |
| NRC Officer: | John Mackinnon |
| Last Updated: | Apr 13, 2005 |
| 41593 - NRC Website | |
WEEKMONTHYEARENS 566452023-07-30T19:26:00030 July 2023 19:26:00
[Table view]10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Manual Reactor Trip Due to LOW Main Turbine ELECTRO-HYDRAULIC Control (EHC) Oil Level ENS 565652023-05-06T19:52:0006 May 2023 19:52:00 10 CFR 50.72(b)(3)(iv)(A), System Actuation Actuations of Reactor Protection System ENS 565642023-04-12T15:07:00012 April 2023 15:07:00 10 CFR 50.72(b)(3)(iv)(A), System Actuation Automatic Actuation of "B" Emergency Diesel Generator Emergency Power Sequencer ENS 527182017-04-29T22:44:00029 April 2017 22:44:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Manual Reactor Trip Due to Steam Generator Hi-Hi Level Signal and Feedwater Isolation ENS 517652016-03-02T18:12:0002 March 2016 18:12:00 10 CFR 50.72(b)(3)(iv)(A), System Actuation Valid Actuation of Emergency Feedwater ENS 517622016-03-02T07:53:0002 March 2016 07:53:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Turbine Trip Causing a Reactor Trip ENS 473272011-10-06T16:26:0006 October 2011 16:26:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Automatic Reactor Trip Due to Low Steam Generator Water Level ENS 454032009-10-02T02:39:0002 October 2009 02:39:00 10 CFR 50.72(b)(3)(iv)(A), System Actuation Unit Experienced a Valid Rps Actuation During Plant Cooldown on Low Steam Generator Levels ENS 439212008-01-20T04:02:00020 January 2008 04:02:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Automatic Reactor Trip Following Turbine Trip ENS 416552005-05-01T15:09:0001 May 2005 15:09:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Manual Reactor Trip Due to Main Turbine High Vibration ENS 415932005-04-13T08:50:00013 April 2005 08:50:00 10 CFR 50.72(b)(3)(iv)(A), System Actuation During Core Reload Reactor Trip Breakers Opened ENS 414282005-02-22T08:08:00022 February 2005 08:08:00 10 CFR 50.72(b)(3)(iv)(A), System Actuation Emergency Diesel Generator and Emergency Feedwater Auto Start on Vital Bus Failure to Transfer ENS 402862003-11-01T00:48:0001 November 2003 00:48:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Reactor Trip on Low Steam Generator Water Level 2023-07-30T19:26:00 | |
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