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At 0329 CST on 11/29/2011, Unit 2 experien … At 0329 CST on 11/29/2011, Unit 2 experienced an automatic Reactor Trip while the plant was stable at 100% power in Mode 1. All systems actuated as designed. The reactor trip was caused by Generator Lockout.</br>All ESF systems actuated as designed. The following systems actuated: Auxiliary Feedwater (AFW) and Feedwater Isolation.</br>All control rods fully inserted. Steam Dump system valve FV 7485 failed open and was manually isolated. This caused a letdown isolation that was restored. No primary/secondary relief valves lifted. There were no electrical bus transfer problems. Normal operating temperature and pressure (of) 567 degrees F and 2235 psig (is being maintained). There were no significant TS LCOs entered.</br>The electrical grid is stable and is supplying power to the plant via a normal shutdown electrical line-up. Decay heat is being removed via steam dumps to the condenser with AFW supplying the steam generators. There was no effect on Unit 1.</br>The licensee has notified the NRC Resident Inspector.</br>* * * UPDATE ON 11/29/11 AT 1312 EST FROM BRINKLY TO HUFFMAN * * * </br>The licensee has issued a press release concerning this event. The NRC Resident Inspector will be notified. R4DO (Farnholtz) informed.l be notified. R4DO (Farnholtz) informed. +
09:29:00, 29 November 2011 +
47,485 +
06:55:00, 29 November 2011 +
09:29:00, 29 November 2011 +
At 0329 CST on 11/29/2011, Unit 2 experien … At 0329 CST on 11/29/2011, Unit 2 experienced an automatic Reactor Trip while the plant was stable at 100% power in Mode 1. All systems actuated as designed. The reactor trip was caused by Generator Lockout.</br>All ESF systems actuated as designed. The following systems actuated: Auxiliary Feedwater (AFW) and Feedwater Isolation.</br>All control rods fully inserted. Steam Dump system valve FV 7485 failed open and was manually isolated. This caused a letdown isolation that was restored. No primary/secondary relief valves lifted. There were no electrical bus transfer problems. Normal operating temperature and pressure (of) 567 degrees F and 2235 psig (is being maintained). There were no significant TS LCOs entered.</br>The electrical grid is stable and is supplying power to the plant via a normal shutdown electrical line-up. Decay heat is being removed via steam dumps to the condenser with AFW supplying the steam generators. There was no effect on Unit 1.</br>The licensee has notified the NRC Resident Inspector.</br>* * * UPDATE ON 11/29/11 AT 1312 EST FROM BRINKLY TO HUFFMAN * * * </br>The licensee has issued a press release concerning this event. The NRC Resident Inspector will be notified. R4DO (Farnholtz) informed.l be notified. R4DO (Farnholtz) informed. +
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