ENS 47489: 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 = 11/29/2011 17:28 CST | | event date = 11/29/2011 17:28 CST | ||
| last update date = 11/29/2011 | | last update date = 11/29/2011 | ||
| title = Unit Experienced | | title = Unit Experienced an Automatic Reactor Scram During a Planned Shutdown | ||
| event text = During a planned shutdown in preparation for refueling outage C1R13, shortly after tripping the main turbine, an automatic reactor scram occurred due to high reactor steam dome pressure. Preliminarily, per the plant process computer, the reactor pressure was observed to reach approximately 1074 psig approximately 26 seconds after main steam bypass valves unexpectedly closed. An investigation will be conducted to determine the cause of the bypass valve closure and reactor scram. No safety relief valves lifted as a result of the pressure increase. | | event text = During a planned shutdown in preparation for refueling outage C1R13, shortly after tripping the main turbine, an automatic reactor scram occurred due to high reactor steam dome pressure. Preliminarily, per the plant process computer, the reactor pressure was observed to reach approximately 1074 psig approximately 26 seconds after main steam bypass valves unexpectedly closed. An investigation will be conducted to determine the cause of the bypass valve closure and reactor scram. No safety relief valves lifted as a result of the pressure increase. | ||
This event is being reported under 10 CFR 50.72(b)(2)(iv)(B) as an event or condition that results in actuation of the reactor protection system when the reactor was critical. | This event is being reported under 10 CFR 50.72(b)(2)(iv)(B) as an event or condition that results in actuation of the reactor protection system when the reactor was critical. | ||
Latest revision as of 22:05, 1 March 2018
| Where | |
|---|---|
Clinton  Illinois (NRC Region 3) | |
| Reporting | |
| 10 CFR 50.72(b)(2)(iv)(B), RPS Actuation | |
| LER: | 05000461/LER-2011-004 |
| Time - Person (Reporting Time:+-1.68 h-0.07 days <br />-0.01 weeks <br />-0.0023 months <br />) | |
| Opened: | Ken Leffel 21:47 Nov 29, 2011 |
| NRC Officer: | Steve Sandin |
| Last Updated: | Nov 29, 2011 |
| 47489 - NRC Website
| |