ENS 46863: Difference between revisions
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StriderTol (talk | contribs) (Created page by program invented by StriderTol) |
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| event date = 05/19/2011 14:07 CDT | | event date = 05/19/2011 14:07 CDT | ||
| last update date = 05/19/2011 | | last update date = 05/19/2011 | ||
| title = Manual Reactor Trip After | | title = Manual Reactor Trip After a Main Condenser Tube Leak | ||
| event text = At 1407 CDT CPNPP [Comanche Peak Nuclear Power Plant] Unit-2 was manually tripped due to indication of a main condenser tube failure. The trip was uncomplicated, all control and shutdown banks fully inserted, neither emergency diesel generator started, all safety systems functioned as designed. Both motor driven and the turbine driven AFW [auxiliary feedwater] pumps started as required to restore steam generator level as a result of the trip. The turbine driven AFW pumps has been returned to auto start status. Currently Unit-2 is in mode 3, no-load Tave 557 degrees F with temperature being maintained with AFW and steam dumps to the main condenser. Recovery actions are currently being planned. All electrical busses are powered from offsite power and grid conditions are stable. | | event text = At 1407 CDT CPNPP [Comanche Peak Nuclear Power Plant] Unit-2 was manually tripped due to indication of a main condenser tube failure. The trip was uncomplicated, all control and shutdown banks fully inserted, neither emergency diesel generator started, all safety systems functioned as designed. Both motor driven and the turbine driven AFW [auxiliary feedwater] pumps started as required to restore steam generator level as a result of the trip. The turbine driven AFW pumps has been returned to auto start status. Currently Unit-2 is in mode 3, no-load Tave 557 degrees F with temperature being maintained with AFW and steam dumps to the main condenser. Recovery actions are currently being planned. All electrical busses are powered from offsite power and grid conditions are stable. | ||
The reactor was manually tripped because of rising sodium concentration in the main condenser/feedwater. | The reactor was manually tripped because of rising sodium concentration in the main condenser/feedwater. | ||
Latest revision as of 22:07, 1 March 2018
| Where | |
|---|---|
Comanche Peak  Texas (NRC Region 4) | |
| Reporting | |
| 10 CFR 50.72(b)(2)(iv)(B), RPS Actuation 10 CFR 50.72(b)(3)(iv)(A), System Actuation | |
| Time - Person (Reporting Time:+-2.12 h-0.0883 days <br />-0.0126 weeks <br />-0.0029 months <br />) | |
| Opened: | Pat Minahan 17:00 May 19, 2011 |
| NRC Officer: | Mark Abramovitz |
| Last Updated: | May 19, 2011 |
| 46863 - NRC Website
| |
Comanche Peak with 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation | |