05000397/FIN-2010004-04
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Finding | |
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Title | Lack of an Evaluation of the Effect of Fire on the Reactor Protection System/Scram |
Description | License Condition 2.C.(14) states, The licensee shall implement and maintain in effect all provisions of the approved fire protection program as described in Section 9.5.1 and Appendix F of the Final Safety Analysis Report (FSAR) for the facility thru Amendment No. 39 and as described in subsequent letters to the staff through November 30, 1988, referenced in the May 22, 1989, safety evaluation and in other pertinent sections of the FSAR referenced in either Section 9.5.1 or Appendix F and as approved in the Safety Evaluation Report issued in March 1982 (NUREG 0892) and in Supplement 3, issued in May 1983, and Supplement 4, issued in December 1983, and in safety evaluations issued with letters dated November 11, 1987 and May 22, 1989. FSAR, Section F.4.3, states, The systems and equipment which are designated as post-fire safe shutdown equipment represent the minimum equipment which is necessary to bring the plant to a safe cold shutdown condition in the event of a fire in any area of the plant. Only that portion of post-fire safe shutdown equipment which is expected to be free of fire damage is credited for post-fire safe shutdown, although other plant systems and equipment could also be available for use after a fire. Contrary to the above, the licensee did not implement the approved fire protection program. The licensee did not assure that the potential effects of fire damage on a required post-fire safe shutdown component would not preclude the ability to bring the plant to cold shutdown. Specifically, fire damage that had the potential to create two simultaneous hot shorts in the mode switch could prevent a reactor scram, and Procedure ABN-CR-EVAC failed to require that operators de-energized the reactor protection system in a timely manner to ensure a full reactor scram resulted prior to emergency depressurization. The licensee had entered this finding into their corrective action program as Condition Reports 2-06-02397 and 2-06-05147, established appropriate compensatory measures, and corrected the condition prior to May 2, 2010. Because the violation was associated with multiple fire induced circuit faults and identified and corrected prior to the end of the discretion period, the NRC is exercising enforcement discretion in accordance with Enforcement Guidance Memorandum 09-002 |
Site: | Columbia ![]() |
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Report | IR 05000397/2010004 Section 4OA5 |
Date counted | Sep 30, 2010 (2010Q3) |
Type: | Violation: Green |
cornerstone | Emergency Prep, Mitigating Systems |
Identified by: | NRC identified |
Inspection Procedure: | |
Inspectors (proximate) | L Ricketson P Elkman G Guerra C Graves G Pick R Cohen D Stearns L Carson W Walker M Hayes |
INPO aspect | |
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Finding - Columbia - IR 05000397/2010004 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Columbia) @ 2010Q3
Self-Identified List (Columbia)
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