ENS 43836: Difference between revisions
Jump to navigation
Jump to search
StriderTol (talk | contribs) (Created page by program invented by Mark Hawes) |
StriderTol (talk | contribs) (Created page by program invented by StriderTol) |
||
| Line 16: | Line 16: | ||
| event date = 12/11/2007 08:55 CST | | event date = 12/11/2007 08:55 CST | ||
| last update date = 02/08/2008 | | last update date = 02/08/2008 | ||
| title = Loss | | title = Loss of Rhr Room Cooler | ||
| event text = At 08:55 on 12/11/07 the division 1 RHR room cooler, V-AC-5 would not start. At approximately 10:00, troubleshooting determined that the cause of the failure was a blown line fuse on the B phase of the 480 VAC supply breaker. In accordance with plant procedures, a loss of this room cooler requires that the associated division 1 core spray pump and both division 1 LPCI pumps be declared inoperable. The result is entry into Technical Specification 3.5.1 Condition M due to having two or more ECCS injection/spray subsystems inoperable. This requires entry into LCO 3.0.3. At 10:53 on 12/11/07 the blown line fuse was replaced, the unit was tested and operability was restored. LCO 3.0.3 was exited at this time. | | event text = At 08:55 on 12/11/07 the division 1 RHR room cooler, V-AC-5 would not start. At approximately 10:00, troubleshooting determined that the cause of the failure was a blown line fuse on the B phase of the 480 VAC supply breaker. In accordance with plant procedures, a loss of this room cooler requires that the associated division 1 core spray pump and both division 1 LPCI pumps be declared inoperable. The result is entry into Technical Specification 3.5.1 Condition M due to having two or more ECCS injection/spray subsystems inoperable. This requires entry into LCO 3.0.3. At 10:53 on 12/11/07 the blown line fuse was replaced, the unit was tested and operability was restored. LCO 3.0.3 was exited at this time. | ||
The Technical Specification bases for Technical Specification 3.5.1 Condition M states that when multiple ECCS subsystems are inoperable, as stated in Condition M, the Plant is in a condition outside of the accident analyses. As described in this bases section the plant is in an unanalyzed condition and pursuant to 10 CFR 50.72(b)(3)(ii) an 8 hour report is being made. | The Technical Specification bases for Technical Specification 3.5.1 Condition M states that when multiple ECCS subsystems are inoperable, as stated in Condition M, the Plant is in a condition outside of the accident analyses. As described in this bases section the plant is in an unanalyzed condition and pursuant to 10 CFR 50.72(b)(3)(ii) an 8 hour report is being made. | ||
Latest revision as of 22:15, 1 March 2018
| Where | |
|---|---|
Monticello  Minnesota (NRC Region 3) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition | |
| Time - Person (Reporting Time:+2.55 h0.106 days <br />0.0152 weeks <br />0.00349 months <br />) | |
| Opened: | Randy Sand 17:28 Dec 11, 2007 |
| NRC Officer: | Mark Abramovitz |
| Last Updated: | Feb 8, 2008 |
| 43836 - NRC Website
| |