ENS 48475: 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 = 11/02/2012 01:42 CDT | | event date = 11/02/2012 01:42 CDT | ||
| last update date = 11/02/2012 | | last update date = 11/02/2012 | ||
| title = Manual Reactor Trip Due | | title = Manual Reactor Trip Due to High Reactor Coolant Pump Motor Bearing Temperature | ||
| event text = At 0142 CDT, Comanche Peak Nuclear Power Plant Unit 1 was manually tripped due to high temperature indications on the 1-04 reactor coolant pump motor radial bearing concurrent with a high / low oil reservoir level alarm. The trip was uncomplicated; all control rods and shutdown rods fully inserted; neither emergency diesel generator started; all safety systems functioned as designed. Both motor driven and the turbine driven auxiliary feed water pumps started as required to restore steam generator levels as a result of the trip. The turbine driven AFW pump was stopped per procedure and returned to auto-start status. Currently, Unit 1 is in Mode 3, no load Tave of 557 degrees F, with temperature being maintained with AFW and steam dumps to the main condenser. All electrical busses are powered from offsite and grid conditions are stable. | | event text = At 0142 CDT, Comanche Peak Nuclear Power Plant Unit 1 was manually tripped due to high temperature indications on the 1-04 reactor coolant pump motor radial bearing concurrent with a high / low oil reservoir level alarm. The trip was uncomplicated; all control rods and shutdown rods fully inserted; neither emergency diesel generator started; all safety systems functioned as designed. Both motor driven and the turbine driven auxiliary feed water pumps started as required to restore steam generator levels as a result of the trip. The turbine driven AFW pump was stopped per procedure and returned to auto-start status. Currently, Unit 1 is in Mode 3, no load Tave of 557 degrees F, with temperature being maintained with AFW and steam dumps to the main condenser. All electrical busses are powered from offsite and grid conditions are stable. | ||
The licensee has notified the NRC Resident Inspector. | The licensee has notified the NRC Resident Inspector. | ||
Latest revision as of 21:02, 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:+-3.2 h-0.133 days <br />-0.019 weeks <br />-0.00438 months <br />) | |
| Opened: | Don Cherny 03:30 Nov 2, 2012 |
| NRC Officer: | Steve Sandin |
| Last Updated: | Nov 2, 2012 |
| 48475 - 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 | |