ML20039F154
| ML20039F154 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 12/14/1981 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20037A870 | List: |
| References | |
| NUDOCS 8201120081 | |
| Download: ML20039F154 (1) | |
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ENCLOSURE 4
SAFETY EVALUATION ARKANSAS NUCLEAR ONE - UNIT 2 OVERRIDE OF CONTAINMENT PURGE ISOLATION AND OTHER ENGINEERED SAFETY FEATURE ACTUATION SIGNALS
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INTRODUCTION As a result of Abnormal Occurrence #78-S, the NRC issued a generic letter requesting each licensee to take certain actions.
EVALUATION The attached interim report was prepared for use by EG&G Idaho, as part of our technical assistance program. This report provides a technical evaluation of the electrical instrumentation and control design aspects of the override of containment purge valves isolation and other engineered safety feature actuation signals and is based upon review of the cesign aspects including proposed modifications against the 6 staff review criteria provided for the review. The isolation valves for venting and purging satisfy the staff review criteria cited above provided that tne containment ventilation isolation (CVI) valves are closed during plant operation.
CONCLUSION Sased upon our review of the consultant's technical evaluation, we conclude tnat the electrical, instrumentation and control design aspects of the overrice of containment purge valve isolation and other engineered safety feature actuation signals are acceptable if tne purge and ventilation isolation valves remain closed during reactor operation. We also consider tne contractor's interim recort to be a final reocrt because there is to be no further contractor effort on this subject for this clant.
8201120081 811214
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