05000445/FIN-2015002-05
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Finding | |
|---|---|
| Title | Licensee-Identified Violation |
| Description | A licensee identified violation of Unit 1 and Unit 2 License Condition 2.G Fire Protection, was identified for the licensees failure to correctly implement the fire protection program with regard to unfused direct current ammeter circuits that could result in a secondary fire due to multiple fire induced faults. Inspectors determined that this issue required a detailed risk evaluation. A senior reactor analyst performed a detailed risk evaluation and the bounding change to the core damage frequency was less than 2E-8/year (Green). The dominant core damage sequences involved a control room fire initiating event in the train A or B direct current ammeter cabinets, a secondary cable fire in a cable tray associated with one train of safety related equipment (two hot shorts required), and having the alternate train of safety related equipment out of service for maintenance. The low fire frequency and the train separation and protection that are required by the fire protection program helped to minimize the significance. |
| Site: | Comanche Peak  |
|---|---|
| Report | IR 05000445/2015002 Section 4OA7 |
| Date counted | Jun 30, 2015 (2015Q2) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | C Cowdrey E Schrader G Guerra J Josey J Kirkland J Larsen M Bloodgood M Williams P Elkmann R Kumana T Farina T Hipschman |
| Violation of: | License Condition - Fire Protection License Condition |
| INPO aspect | |
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Finding - Comanche Peak - IR 05000445/2015002 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Comanche Peak) @ 2015Q2
Self-Identified List (Comanche Peak)
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