ML20009H096
| ML20009H096 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 07/17/1981 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20009H095 | List: |
| References | |
| IEB-80-06, IEB-80-6, NUDOCS 8108060006 | |
| Download: ML20009H096 (2) | |
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NUCLEAR REGULATORY COMMISSION 3.h E
WASHINGTON, D. C. 20555
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SAFETY EVALUATION REPORT THREE MILE ISLAND NUCLEAR POWER STATION UNIT 1 l
LICENSEE RESPONSE TO I&E BULLETIN 80-06, ENGINEERED SAFETY FEATURES (ESF) RESET CONTROLS 5
INTRODUCTION Instances have been reported at operating nuclear power plants where it had been found that following the reset of an ESF actuated signal, certain equipment (e.g., ventilation dampers, motors, and valves) would return to its nomal mode which could comprcmise the protective actions of the affected systems.
As a result, on March 13, 1980 the NRC issued I&E Bulletin 80-06 requesting l
certain actions to be taken by licensees for all PWR and BWR facilities with operating licenses.
EVALUATION The enclosed report (EGG ll83-4196)was prepared for us by E G & G, Inc.,
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San Ramon, California as part of our technical assistance contractor program.
It provides their technical evaluation of the licensee's response to I&E I
l Bulletin 80-06 in accordance with NRC-provided guidance.
l For all safety systems E G & G concluded that safety-related equipment remains in its emergency mode upon reset of the ESF actuated signals, except for the eight identified ESF devices (sampling valves) found to change position upon ESFAS reset. The licensee provided a detailed modification scheme for each of these devices which E G & G concluded will assure that the identified de-vices will remain in their emergency made position upon ESFAS reset.
- Further, the licensee cemitted to modify and test these systems during the first refuel-ing outage, after restart of TMI-1, to demonstrate compliance. Therefore, l
E G & G found the plant to satisfy the requirements of I&E Bulletin 80-06.
8108060006 810717 PDR ADOCK 05000289 G
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' CONCLUSION Based on the information and' documents provided by the licensee, and on our
- review of the contractor's report, we conclude that the licensee has satis-fied the concerns of I&E Bulletin 80-06 -and the ESF reset controls for TitI-l are in compliance with our criteria, subject to completing.the modifications o
and the successful.. completion of confirmatory testing.
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Dated:- July 17,1981 A
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