05000285/FIN-2009002-01
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Finding | |
|---|---|
| Title | Failure to Implement Adequate Corrective Action for Floor Cracks |
| Description | A self-revealing noncited violation of 10 CFR Part 50, Appendix B, Criterion XVI, Corrective Action, was identified for the licensees failure to take prompt corrective measures after identifying that water could penetrate cracks in the turbine building concrete floor and adversely impact the operability of an emergency diesel generator and safety related switchgear. Cracks in the floor of turbine building mechanical equipment room were identified in February 2006, when water was observed leaking into the Diesel Generator 1 room (Room 63). The licensee took no immediate corrective actions to evaluate or repair the cracks. In February 2009, water was again observed leaking into Room 63, resulting in unexpected tripping of breakers associated with the Diesel Generator 1, secondary compressor motor starter. The licensee entered this issue into their corrective action program as Condition Report2009-0687.This finding was more than minor because the failure to perform adequate corrective actions on the turbine building floor, if left uncorrected, could become a more serious safety concern. Specifically, water could seep through the floor and render the emergency diesel generator and/or safety related switchgear inoperable. Using the Manual Chapter 0609, Significance Determination Process, Attachment 4 Phase1-Initial Screening and Characterization of Findings, this finding was of very low safety significance because it: 1) was confirmed to result in a loss of functionality of the secondary compressor motor starter; 2) did not represent a loss of safety function;3) did not result in a loss of a technical specification required train for more than its allowed outage time; 4) did not result in a loss of risk significant equipment for more than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />; and 5) did not screen as potentially risk significant due to a seismic, flooding, or severe weather initiating event. This finding did not have a crosscutting aspect because the performance deficiency was aged and not indicative of current licensee performance |
| Site: | Fort Calhoun  |
|---|---|
| Report | IR 05000285/2009002 Section 4OA2 |
| Date counted | Mar 31, 2009 (2009Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71152 |
| Inspectors (proximate) | J Kirkland J Hanna J Clark |
| INPO aspect | |
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Finding - Fort Calhoun - IR 05000285/2009002 | ||||||||||||||||||||||||||||||||||||||||||
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Finding List (Fort Calhoun) @ 2009Q1
Self-Identified List (Fort Calhoun)
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