05000275/FIN-2009002-03
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Finding | |
|---|---|
| Title | Licensee-Identified Violation |
| Description | Title 10 CFR 50, Appendix B, Criteria X, Inspection, required PG&E to perform examinations or measurements where necessary to assure quality. Contrary to this, Work Package 1-3055C, Reinstall Lower Supports 1-3, completed on March 16, 2009, did not include an examination of the gap between the seismic mounting plates and the load bearing surfaces for the Unit 1 replacement steam generators. As a result, Steam Generator 1-3 was placed in service on March 20, 2009 in an unanalyzed condition due to excessive gaps between two seismic mounting plates and corresponding support columns. On March 22, 2009, after establishing the reactor coolant system at normal operating temperature and pressure, PG&E identified the excessive gaps after a temporary worker raised the concern during an exit interview. The licensee declared the reactor coolant system inoperable and applied the provisions of Technical Specification 3.0.3. PG&E took corrective actions to repair seismic mounting plates. The licensee entered this condition into the correction action program as Notification 50214618, SG 1-3 Column Bearing Surface Issue, This finding is of very low safety significance because the condition did not screen as potentially risk significant due to a seismic, flooding, or severe weather initiating event |
| Site: | Diablo Canyon  |
|---|---|
| Report | IR 05000275/2009002 Section 4OA7 |
| Date counted | Mar 31, 2009 (2009Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | M Brown M Peck B Henderson D Stearns G George V Gaddy C Alldredge M Vasquez |
| INPO aspect | |
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Finding - Diablo Canyon - IR 05000275/2009002 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Diablo Canyon) @ 2009Q1
Self-Identified List (Diablo Canyon)
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