05000390/FIN-2012005-06
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Finding | |
|---|---|
| Title | Licensee-Identified Violation |
| Description | Technical Requirements 3.4.2, Pressurizer Temperature Limits, required that the pressurizer heat-up rate be limited to U100a F in any 1-hour period. The TR action statement A.1 required that the limit be restored within 30 minutes. Contrary to the above, at or around 0834, on October 10, 2012, while Unit 1 was in Mode 5, the licensee determined that the pressurizer vapor space heat-up rate limit of U100a F in any 1-hour period had been exceeded. The heat-up rate was 103a F per hour. The heat-up rate was returned to within limits in less than the limiting condition of operation (LCO) action time of 30 minutes. The finding was screened in accordance with IMC 0609 Appendix G, Shut-down Operations SDP and was characterized to be of very low safety significance (Green) because the pressurizer water temperature did not exceed the TR heat-up rate, only the vapor temperature by a small (3a F per hour) amount and the engineering staff review using OEM documentation concluded that there were no adverse consequences. |
| Site: | Watts Bar  |
|---|---|
| Report | IR 05000390/2012005 Section 4OA7 |
| Date counted | Dec 31, 2012 (2012Q4) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | D Failla E Patterson J Hamman K Miller M Speck R Baldwin R Lanyi R Monk S Shaeffer |
| INPO aspect | |
| ' | |
Finding - Watts Bar - IR 05000390/2012005 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Watts Bar) @ 2012Q4
Self-Identified List (Watts Bar)
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