05000397/FIN-2012005-06
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Finding | |
|---|---|
| Title | Licensee-Identified Violation |
| Description | Technical Specification 3.8.7 Distribution Systems - Operating , requires, in part, that the division 1 and division 2 AC electrical power distribution subsystems be operable in Modes 1, 2 and 3. Technical Specification 3.8.7, Condition A, requires that when the division 1 or 2 AC electrical power distribution subsystem is inoperable, action is taken to restore the division 1 and 2 AC electrical power distribution subsystems to operable status within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />. Failure to meet Technical Specification 3.8.7, Condition A, requires entry into Technical Specification 3.8.7, Condition C. Required Action C.1 requires the unit be placed in Mode 3 within an additional 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />. Contrary to the above, on November 24, 2009, August 4, 2010, and September 1, 2010, the division 1 125 V AC power distribution room cooler RRA-FN-11 was inoperable for greater than 20 hours2.314815e-4 days <br />0.00556 hours <br />3.306878e-5 weeks <br />7.61e-6 months <br /> rendering the supported division 1 125 V AC power distribution subsystem inoperable. Additionally, on April 26, 2010, the division 2 125 V AC distribution room cooler RRA-FN-10 was inoperable for 20.0 hours0 days <br />0 hours <br />0 weeks <br />0 months <br /> rendering the supported division 2 125 V AC power distribution subsystem inoperable. In each instance action was not taken to place Columbia Generating Station in Mode 3 as required by Technical Specification 3.8.7, Required Action C.1. Additionally, Technical Specification 3.8.7 Distribution Systems - Operating , requires, in part, that the division 1 DC electrical power distribution subsystems be operable in Modes 1, 2 and 3. Technical Specification 3.8.7 Condition D requires that when the division 1 250 V DC electrical power distribution subsystem is inoperable, the licensee to declare the supported features inoperable immediately. On September 1, 2010, division 1 250 V DC power distribution system room cooler RRA-FN-12 was inoperable which requires the licensee to declare the reactor water cleanup system outboard isolation valve RWCU-V-4 inoperable. Valve RWCU-V-4 is a primary containment isolation valve. When this valve is inoperable, Technical Specification 3.6.1.3 Condition A, requires the licensee to isolate the affected penetration flow path by use of at least one closed and de-activated automatic valve, closed manual valve, blind flange, or check valve with flow through the valve secured within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />. Failure to meet Technical Specification 3.6.1.3, Condition A, requires entry into Technical Specification 3.6.1.3, Condition E. Required Action E.1 requires the unit be placed in Mode 3 within an additional 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />. Contrary to the above, on September 1, 2010, RRA-FN-12 was inoperable for 18.2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />, rendering the supported division 1 250 V DC power distribution subsystem and RWCU-V-4 inoperable and action was not taken to place Columbia Generating Station in Mode 3 as required by Technical Specification 3.6.1.3 Required Action E.1. This finding was identified by the licensee and entered into the corrective action program as Action Request 268099. This finding was evaluated by a senior reactor analyst and determined to be of very low safety significance. |
| Site: | Columbia  |
|---|---|
| Report | IR 05000397/2012005 Section 4OA7 |
| Date counted | Dec 31, 2012 (2012Q4) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | W Walker J Laughlin J Groom M Hayes C Henderson |
| INPO aspect | |
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Finding - Columbia - IR 05000397/2012005 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Columbia) @ 2012Q4
Self-Identified List (Columbia)
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