ML20010F570
| ML20010F570 | |
| Person / Time | |
|---|---|
| Site: | Yankee Rowe |
| Issue date: | 09/04/1981 |
| From: | Crutchfield D Office of Nuclear Reactor Regulation |
| To: | Kay J YANKEE ATOMIC ELECTRIC CO. |
| References | |
| TASK-06-07.C1, TASK-6-7.C1, TASK-RR LSO5-81-09-004, LSO5-81-9-4, NUDOCS 8109100363 | |
| Download: ML20010F570 (4) | |
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gl September 4, 1981 Docket No. 50-29 e
LS05 09-004 Q
SEP o IS81A 7
Mr. James A. Kay E
Senior Engineer - Licensing p
Yankee Atomic Electric Company 1671 Worcester Road y'
f Framingham, klassachusetts 01581 co y
Dear Mr. Kay:
SUBJECT:
SEP TOPIC VI-7.C.1, APPENDIX X - ELECTRICAL INSTRUMENTATION AND CONTROL (EI&C) RE-REVIEWS, SAFETY EVALUATION F0P. YANKEE R0WE The enclosed staff safety evaluation is based on a contractor document that has been made available to you previously. This evaluation is the staff's position regarding design of your facility in the subject area.
With regard to the refenenced topic, the staff has concluded that your facility meets current licensing criteria.
Sincerely, Dennis M. Crutchfield, Chief Operating Resctors Branch No. 5 Division of Licensing Enciosure:
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cc Mr. James E. Tribble, President Yankee Atomic Electric Conpany 25 Research Drive Westborough, Massachusetts 01581 Greenfield Community College 1 College Drive Greenfield, Massachusetts 01301 Chairman Board of Selectmen Town of Rowe Rowe, Massachusetts 01367 Energy Fccilities Siting Council 14th Floor
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Boston, Massachusetts 02108 U. S. Environmental Protection Agency Region I'0ffice ATTN: EIS C0ORDINATOR JFK Federal Building Boston, Massachusetts 02203 Resident Inspector Yankee Rowe Nuclear Power Station c/o U.S. NRC Post Office Box 28 Monroe Bridge, Massachusetts 01350 e
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SYSTEMATIC EVALUATI0t1 PROGRAM TOPIC VI-7.C.1 YANKEE R0WE TOPIC: VI-7.C.1 APPENDIX K - ELECTRICAL INSTRUMENTATION Af'D CONTROL flTCTYE-REVIEWS I.
INTRODUCTION O
During the Appendix K reviews of some facilities initially considered, a detailed EI&C review was not performed. Accordingly we intended to re-review the modified ECCS of these facilities to confirm tnat it is designed to meet the most limiting single failure.
Several types of failure were considered as candidates for designation as the most limiting.
Because of the scope of the other SEP Topics', it was decided that, for the purpose 2
of this study (and to reduce replication of effort on other SEP Topics),
ti.c loss of a single ac or de onsite power system was the mast limiting failure. Accordingly, this tcpic was limited to an evaluation of the independence between the onsite power systems.
II.
REVIEW CRITERIA The review criteria are prest.nted in Section 2 of EG&G Report 0697F,
" Independence of Redundant Onsite Power Systems."
l III. RELATED SAFETY TOPICS AND INTERFAC_ES The scope of review for this topic was limited to avoid duplication of effort since some aspects of the review were performed under related topics. The related topics and the subject matter are identified below.
Each of the related topic reports contain the acceptance criteria and review guidance for its subject matter.
VI-4 Bypass and Reset of Engineered Safety Features (B-24/
VI-7.A.3 ECCS Actuation System VI-7.B ESF Switchover from Injection to Recirculation VI-7.C.2 Failure Mode Analysis-ECCS VI-7.D Long Term Cooling Passive Failures (e.g., flooding)
VI-10. A Testing of Reactor Protection Systems VII-1.A Reactor Trip System Isolation VII-3 Systems Required for Safe Shutdown VIII-2 Onsite Emergency Power Systems VIII-3 Emergency de Power Systems VIII-4 Electrical Penetrations IX-6 Fire Protection The conclusion that suitable isolation devices areIprovided is a basic assumption for Topics VI-7.C.2 and VII-3.
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IV. REVIEW GUIDELINES The review guidelines are presented in Section 3 of Report 0697F,
" Independence of Redundant Onsite Power Systems."
V.
EVALUATION As noted in Report 0697F, " Independence of Redundant Onsite Power Systems," the separation between redundant systems is not compromised by the onsite power system.
The review of docketed information and plant electrical drawings in-dicates that the Yankee Rowe onsite emergency redundant power sources-and distribution system meet the current licensing requirements for independence of onsite power systems.
VI. CONCLUSION As a result of our review of our contractor's work the staff concludes that the subject ac and de onsite systems satisfy all of the review criteria and are, therefore, acceptable.
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