05000390/FIN-2010004-02
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Finding | |
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| Title | Licensee-Identified Violation |
| Description | Technical Specification 3.3.1 provides required actions for removing Power Range detector channels from service while in Modes 1 and 2. Required action D.2.2 requires that SR 3.2.4.2, verification of QPTR within limit using either the movable incore detectors or the PDMS, Power Distribution Monitoring System, within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> when power level greater than 75 percent. Contrary to the above, with reactor power at 100 percent RTP, power range detector N44 was removed from service for greater than 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> without performing required action D.2.2. Specifically, with the PDMS out of service, a flux map with the moveable incore detector system was not performed. This was identified in the licensees CAP as PER 254334. This finding was of very low safety significance in accordance with IMC 0609, Attachment 4, SDP Phase 1, Table 4.1, Characterization Worksheet, because the flux tilt was within specification before and after the timeframe that the PDMS was out of service with no rod motion during the timeframe. |
| Site: | Watts Bar  |
|---|---|
| Report | IR 05000390/2010004 Section 4OA7 |
| Date counted | Sep 30, 2010 (2010Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | R Monk W Loo H Gepford E Guthrie G Kuzo L Miller M Pribish C Dykes |
| INPO aspect | |
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Finding - Watts Bar - IR 05000390/2010004 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Watts Bar) @ 2010Q3
Self-Identified List (Watts Bar)
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