ENS 49432: 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 = 10/13/2013 04:20 EDT | | event date = 10/13/2013 04:20 EDT | ||
| last update date = 10/13/2013 | | last update date = 10/13/2013 | ||
| title = Secondary Containment Differential Pressure | | title = Secondary Containment Differential Pressure at Zero Inches Water Gauge | ||
| event text = On October 13, 2013 at 0420 [EDT], Susquehanna Steam Electric Station control room operators received an alarm for a local secondary containment ventilation control panel. Investigation revealed that Zone II (Unit 2 Reactor Building) secondary containment differential pressure was at zero inches water gauge. Tech Spec Secondary Containment Operability requires a negative pressure of at least 0.25 inches water gauge. All fans and dampers appeared to be operating normally and there was no apparent equipment malfunction. Zone I (Unit 1 Reactor Building) and III (Common Refuel Floor Area) ventilation remained in service and stable. | | event text = On October 13, 2013 at 0420 [EDT], Susquehanna Steam Electric Station control room operators received an alarm for a local secondary containment ventilation control panel. Investigation revealed that Zone II (Unit 2 Reactor Building) secondary containment differential pressure was at zero inches water gauge. Tech Spec Secondary Containment Operability requires a negative pressure of at least 0.25 inches water gauge. All fans and dampers appeared to be operating normally and there was no apparent equipment malfunction. Zone I (Unit 1 Reactor Building) and III (Common Refuel Floor Area) ventilation remained in service and stable. | ||
Zone II differential pressure recovered within five minutes and was verified to be stable. LCO 3.6.4.1 was entered for both units at 0420 and exited at 0425. | Zone II differential pressure recovered within five minutes and was verified to be stable. LCO 3.6.4.1 was entered for both units at 0420 and exited at 0425. | ||
Latest revision as of 21:59, 1 March 2018
| Where | |
|---|---|
Susquehanna  Pennsylvania (NRC Region 1) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material | |
| Time - Person (Reporting Time:+0.85 h0.0354 days <br />0.00506 weeks <br />0.00116 months <br />) | |
| Opened: | Alexander Mclellan 09:11 Oct 13, 2013 |
| NRC Officer: | John Shoemaker |
| Last Updated: | Oct 13, 2013 |
| 49432 - NRC Website
| |
Susquehanna with 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material | |