05000336/FIN-2014004-01
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Finding | |
|---|---|
| Title | Licensee-Identified Violation |
| Description | TS 3.6.2.1, Containment Spray and Cooling Systems, requires two containment spray trains and two containment cooling trains to be operable in Modes 1, 2, and 3. If one containment spray train is inoperable, the TS required action is to restore the inoperable train within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or be in Hot Standby within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />. Contrary to the above, at 7:33 PM on May 16, Dominion exceeded the 72 hour8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> allowed outage time for the A containment spray train, due to the delayed completion of the gas void detection surveillance test. In addition, TS 3.0.4 prohibits entry into an Operational Mode without all requisite limiting conditions of operation met. Contrary to the above, at 7:33 PM on May 13, Unit 2 entered Mode 3 with pressure greater than 1750 psia and an inoperable A containment spray train. Dominion entered the issue into the CAP as CR 549280. The inspectors determined that this finding was of very low safety significance using IMC 0609, Appendix A, because the period of unavailability was of short duration (approximately 88 hours0.00102 days <br />0.0244 hours <br />1.455026e-4 weeks <br />3.3484e-5 months <br />) and occurred during Mode 3. The B train of containment spray remained unaffected by the voids found in the A train. |
| Site: | Millstone  |
|---|---|
| Report | IR 05000336/2014004 Section 4OA7 |
| Date counted | Sep 30, 2014 (2014Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | B Haagensen J Ambrosini J Deboer L Mckown N Day R Mckinley S Shaffer |
| Violation of: | Technical Specification |
| INPO aspect | |
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Finding - Millstone - IR 05000336/2014004 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Millstone) @ 2014Q3
Self-Identified List (Millstone)
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