ENS Event | |
|---|---|
09:21 Apr 16, 2010 | |
| Title | Inadvertent Steam Admission to Afw Turbine |
| Event Description | During maintenance on sliding links, the steam admission valve (SA-48) for the Auxiliary Feedwater (AFW) turbine inadvertently opened. Inadequate isolation from the steam header allowed steam flow through SA-77 steam drain valve into the turbine. This small amount of steam caused the pump to rotate at approximately 1000 rpm for approximately 2 minutes. Due to the low discharge pressure, no water was injected into the steam generator during this actuation.
The NRC Resident Inspector has been notified. |
| Where | |
|---|---|
McGuire  North Carolina (NRC Region 2) | |
| Reporting | |
| 10 CFR 50.73(a)(1), Submit an LER, Invalid Actuation | |
| Time - Person (Reporting Time:+583.25 h24.302 days <br />3.472 weeks <br />0.799 months <br />) | |
| Opened: | Phong Vu 16:36 May 10, 2010 |
| NRC Officer: | Charles Teal |
| Last Updated: | May 10, 2010 |
| 45913 - NRC Website
Loading map... | |
Unit 1 | |
|---|---|
| Reactor critical | Not Critical |
| Scram | No |
| Before | Hot Standby (0 %) |
| After | Hot Standby (0 %) |
WEEKMONTHYEARENS 563452023-01-01T11:04:0001 January 2023 11:04:00
[Table view]10 CFR 50.73(a)(1), Submit an LER 60-DAY Optional Telephonic Notification of Invalid Actuation of Auxiliary Feedwater Pump ENS 507202014-11-16T04:55:00016 November 2014 04:55:00 10 CFR 50.73(a)(1), Submit an LER Invalid Actuation of 1A Emergency Diesel Generator (Edg) ENS 485502012-12-02T16:42:0002 December 2012 16:42:00 10 CFR 50.73(a)(1), Submit an LER 60-Day Report - Invalid Auxiliary Feedwater and Nuclear Service Water Pump Actuation ENS 484432012-09-30T03:37:00030 September 2012 03:37:00 10 CFR 50.73(a)(1), Submit an LER Inadvertent Alignment of Nuclear Service Water to Standby Nuclear Service Water Pond ENS 459132010-04-16T09:21:00016 April 2010 09:21:00 10 CFR 50.73(a)(1), Submit an LER Inadvertent Steam Admission to Afw Turbine ENS 450062009-02-23T08:06:00023 February 2009 08:06:00 10 CFR 50.73(a)(1), Submit an LER Inadvertent Actuation of Turbine Auxiliary Feedwater Pump ENS 416352005-04-09T14:39:0009 April 2005 14:39:00 10 CFR 50.73(a)(1), Submit an LER Invalid Specified System Actuation ENS 411512004-10-20T00:20:00020 October 2004 00:20:00 10 CFR 50.73(a)(1), Submit an LER Invalid Turbine Driven Auxiliary Feedwater Actuation 2023-01-01T11:04:00 | |