ENS 41790: Difference between revisions
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StriderTol (talk | contribs) (Created page by program invented by Mark Hawes) |
StriderTol (talk | contribs) (Created page by program invented by StriderTol) |
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| event date = 06/23/2005 13:46 PDT | | event date = 06/23/2005 13:46 PDT | ||
| last update date = 06/23/2005 | | last update date = 06/23/2005 | ||
| title = Unit Experienced | | title = Unit Experienced an Automatic Reactor Scram Due to a Loss of Feedwater Flow | ||
| event text = On June 23, 2005 at 1348 PDT Columbia Generating Station experienced a Reactor Protection System (RPS) actuation and closure of all Main Steam Isolation Valves (MSIV) while operating at approximately 25% power. Currently, Reactor Pressure Vessel (RPV) level is being controlled using the Reactor Core Isolation Cooling (RCIC) system and RPV pressure is stable at approximately 800 psi. There was no automatic ECCS system injection. At this time, the plant is stable and indications show that the RPS actuation and closure of MSIVs was initiated in response to a valid low RPV water level signals that occurred because of a loss of feedwater flow. Determination of the cause of the loss of feedwater flow is ongoing at this time. | | event text = On June 23, 2005 at 1348 PDT Columbia Generating Station experienced a Reactor Protection System (RPS) actuation and closure of all Main Steam Isolation Valves (MSIV) while operating at approximately 25% power. Currently, Reactor Pressure Vessel (RPV) level is being controlled using the Reactor Core Isolation Cooling (RCIC) system and RPV pressure is stable at approximately 800 psi. There was no automatic ECCS system injection. At this time, the plant is stable and indications show that the RPS actuation and closure of MSIVs was initiated in response to a valid low RPV water level signals that occurred because of a loss of feedwater flow. Determination of the cause of the loss of feedwater flow is ongoing at this time. | ||
All control rods fully inserted. | All control rods fully inserted. | ||
Latest revision as of 22:20, 1 March 2018
| Where | |
|---|---|
Columbia Generating Station  Washington (NRC Region 4) | |
| Reporting | |
| 10 CFR 50.72(b)(2)(iv)(B), RPS Actuation 10 CFR 50.72(b)(3)(iv)(A), System Actuation | |
| LER: | 05000397/LER-2005-004 |
| Time - Person (Reporting Time:+-1.93 h-0.0804 days <br />-0.0115 weeks <br />-0.00264 months <br />) | |
| Opened: | Fred Schill 18:50 Jun 23, 2005 |
| NRC Officer: | Steve Sandin |
| Last Updated: | Jun 23, 2005 |
| 41790 - NRC Website
| |
Columbia with 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation | |