05000336/FIN-2012004-01
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Finding | |
|---|---|
| Title | Inadequate Post Maintenance Test Directions following Design Change to 3HVC FN1B |
| Description | The inspectors identified an NCV of 10 CFR 50, Appendix B, Criteria V, Instructions, Procedures, and Drawings, of very low safety significance (Green) for Dominions failure to adequately specify post maintenance test (PMT) requirements for the control room ventilation exhaust fan 1B (3HVCFN1B) following replacement of the breaker starter on June 19, 2012. Specifically, Dominion did not provide sufficient direction to the operations staff in the control room regarding the correct retest procedure or acceptance criteria to complete an adequate PMT. As a result, 3HVCFN1B was retested and returned to an operable status despite the inability of this fan to respond to a control building isolation (CBI) actuation signal. Subsequently, on June 21, 2012, train B heating and ventilation control room (HVC) was declared inoperable after the HVC system failed routine surveillance test SP 3614F.1-002, Control Room Emergency Filtration System Operability Test. Dominion identified that the auxiliary contacts for the 42x relay had not been correctly installed in the breaker for 3HVCFN1B, which would have prevented the automatic starting of the fan during a CBI signal. The PMT acceptance criteria, specified in design change MP3-11-01065 and translated into work order 53102451547 had been met but were not adequate to retest the breaker. Dominion entered this issue into their CAP as CR 492783. The finding is more than minor because it affected the Design Control attribute of the control room ventilation boundary barrier for the Barrier Integrity cornerstone. Additionally, the performance deficiency was similar to example 5.b in Appendix E of Manual Chapter 0612, Examples of Minor Issues. In accordance with IMC 0609, Significant Determination Process, the inspectors performed a Phase 1 analysis and determined that the finding was of very low significance because the finding represented a degradation of the control room radiological barrier function but not degradation against smoke or toxic gas. This finding had a cross-cutting aspect in the Human Performance cross-cutting area, Resources component, because Dominion failed to maintain accurate and up to date procedures and work packages for PMTs following installation of the design change to replace the breaker for 3HVCFN1B. |
| Site: | Millstone  |
|---|---|
| Report | IR 05000336/2012004 Section 1R19 |
| Date counted | Sep 30, 2012 (2012Q3) |
| Type: | NCV: Green |
| cornerstone | Barrier Integrity |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.19 |
| Inspectors (proximate) | R Bellamy J Ambrosini M Modes J Kulp B Haagensen J Furia J Krafty B Smith |
| CCA | H.7, Documentation |
| INPO aspect | WP.3 |
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Finding - Millstone - IR 05000336/2012004 | ||||||||||||||||||||||||||||||||||||||||||
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Finding List (Millstone) @ 2012Q3
Self-Identified List (Millstone)
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