ENS 43675: 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 = 09/28/2007 17:00 EDT | | event date = 09/28/2007 17:00 EDT | ||
| last update date = 09/28/2007 | | last update date = 09/28/2007 | ||
| title = Reactor Vessel Head Vent May Not Be Isolable During | | title = Reactor Vessel Head Vent May Not Be Isolable During a Fire | ||
| event text = Plant engineering determined that in a postulated fire in the Control Room or Cable Spreading Room which required Control Room evacuation, that "hot shorts" may prevent the reactor vessel head vents from performing their emergency functions in accordance with the plant Emergency Operating Procedures (EOPs). Several relays in the letdown system are not isolated at the Auxiliary Shutdown Panel and have the potential for shorting during a fire. This letdown path can be aligned from the reactor vessel head vents during certain EOP scenarios. | | event text = Plant engineering determined that in a postulated fire in the Control Room or Cable Spreading Room which required Control Room evacuation, that "hot shorts" may prevent the reactor vessel head vents from performing their emergency functions in accordance with the plant Emergency Operating Procedures (EOPs). Several relays in the letdown system are not isolated at the Auxiliary Shutdown Panel and have the potential for shorting during a fire. This letdown path can be aligned from the reactor vessel head vents during certain EOP scenarios. | ||
The affected reactor vessel head vent isolation transfer switches are: 3RCS*SV8095A & B and 3RCS*SV8096A & B. | The affected reactor vessel head vent isolation transfer switches are: 3RCS*SV8095A & B and 3RCS*SV8096A & B. | ||
Latest revision as of 21:15, 1 March 2018
| Where | |
|---|---|
Millstone  Connecticut (NRC Region 1) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition | |
| Time - Person (Reporting Time:+-2.25 h-0.0938 days <br />-0.0134 weeks <br />-0.00308 months <br />) | |
| Opened: | Brien Strizzi 18:45 Sep 28, 2007 |
| NRC Officer: | Mark Abramovitz |
| Last Updated: | Sep 28, 2007 |
| 43675 - NRC Website
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