ENS 41779: Difference between revisions
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StriderTol (talk | contribs) (Created page by program invented by StriderTol) |
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| event date = 06/15/2005 14:00 PDT | | event date = 06/15/2005 14:00 PDT | ||
| last update date = 06/15/2005 | | last update date = 06/15/2005 | ||
| title = Automatic Reactor Scram Due | | title = Automatic Reactor Scram Due to Turbine Throttle Valve Closure | ||
| event text = On June 15, 2005 at 1400 PDT Columbia Generating Station experienced a Reactor Protection System (RPS) actuation while operating at full power. Currently, reactor level is being controlled with the feedwater system and reactor pressure is being controlled via the turbine bypass valves to the condenser. All safety systems functioned as expected and there was no ECCS system injection. The initial attempt to trip the main turbine from the control room was unsuccessful and it was subsequently tripped locally. At this time the plant is stable and indications show that the RPS actuation originated from closure of turbine throttle valves. Determination of the cause of the RPS actuation is ongoing at this time. | | event text = On June 15, 2005 at 1400 PDT Columbia Generating Station experienced a Reactor Protection System (RPS) actuation while operating at full power. Currently, reactor level is being controlled with the feedwater system and reactor pressure is being controlled via the turbine bypass valves to the condenser. All safety systems functioned as expected and there was no ECCS system injection. The initial attempt to trip the main turbine from the control room was unsuccessful and it was subsequently tripped locally. At this time the plant is stable and indications show that the RPS actuation originated from closure of turbine throttle valves. Determination of the cause of the RPS actuation is ongoing at this time. | ||
All rods fully inserted and no relief valves lifted. | All rods fully inserted and no relief valves lifted. | ||
Latest revision as of 21:20, 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-2005-003 |
| Time - Person (Reporting Time:+-2.37 h-0.0988 days <br />-0.0141 weeks <br />-0.00325 months <br />) | |
| Opened: | Fred Schill 18:38 Jun 15, 2005 |
| NRC Officer: | Chauncey Gould |
| Last Updated: | Jun 15, 2005 |
| 41779 - 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 | |