ML20135C907

Forwards Safety Evaluation Supporting Conclusion That Diversification of Scram Discharge Vol Level Instrumentation Not Necessary.Tech Specs Resolve Concerns Re Need for Instrumentation Diversity

ML20135C907
Person / Time
Site:	Vermont Yankee
Issue date:	09/10/1985
From:	Vassallo D Office of Nuclear Reactor Regulation
To:	Capstick R VERMONT YANKEE NUCLEAR POWER CORP.
Shared Package
ML20135C908	List: ML20135C907 ML20135C912
References
NUDOCS 8509130030
Download: ML20135C907 (2)

Text

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Ssptember 10, 1985 Docket No. 50-271 DISTRIBUTION

Docket Fue:

NRC PDR Mr. R. W. Capstick ' local PDR~ ORB #2 Rdg Licensing Engineer HThompson OELD Vermont Yankee Nuclear Power Corporation SNorris VRooney 1671 Worcester Road ELJordan JPartlow Framingham, Massachusetts 01701 BGrimes ACRS(10)

Gray File TChandrasekaran

SUBJECT:

DIVERSE SCRAM DISCHARGE VOLUME LEVEL INSTRUMENTATION Re: Vermont Yankee Nuclear Power Station By letter dated March 6,1981 we informed you of: 1) your schedular requirements for long-term modifications of the BWR scram discharge volume,

2) the need for revised Technical Specifications prior to operation with the modified scram discharge volume, and 3) our requirement that the design include diverse instrumentation. By letters dated April 14, 1981 and January 10, 1983 you proposed alternative modifications in lieu of provision of diverse instrumentation. These modifications were completed during the plant refueling outage in 1983, and we issued Amendment No. 76 to the facility operating license on March 28, 1983 incorporating changes in the plant Technical Specifications which reflect the completed modifications.

The Safety Evaluation accompanying License Amendment No. 76 supports our conclusion that the Technical Specifications you proposed in your January 10, 1983 submittal are acceptable.

The enclosed Safety Evaluation supports our conclusion that diversification of the scram discharge volume level instrumentation is not necessary at the Vermont Yankee plant, and that the Vermont Yankee Technical Specifications as modified in License Amendment No. 76 acceptably resolve staff concerns associated with the need for scram discharge volume level instrumentation diversity.

Sincerely, Original signed by/

g91300 8%$73 Domenic B. Vassallo, Chief p PDR Operating Reactors Branch #2 Division of Licensing

Enclosure:

Safety Evaluation cc w/ enclosure: O See next page h

DL:0RB 2 DL:0RB#2 DL:0RB#2 SNo s:a s VRooney DVassallo 09/ 'j/85 09/v/85 09//d/85 l

Mr. R. W. Capstick Vermont Yankee Nuclear Power Corporation Vermont Yankee Nuclear Power Station cc:

Mr. W. F. Conway W. P. Murphy, Vice President &

President & Chief Executive Officer Manager of Operations Vermont Yankee Nuclear Power Corp. Vermont Yankee Nuclear Pcwer Corp.

R. D. 5, Box 169 R. D. 5, Box 169 Ferry Road Ferry Road Brattleboro, Vermont 05301 Brattleboro, Vernont 05301 Mr. Donald Hunter, Vice President Mr. Gerald Tarrant , Comnissioner Vermont Yankee Nuclear Power Corp. Vermont Department of Public Service 1671 Worcester Road 120 State Street Framingham, Massachusetts 01701 Montpelier, Vermont 05602 New England Coalition en Nuclear Pollution Hill and Dale Farm Public Service Board R. D. 2 Box 223 State of Vermont '

Putney, Vermont 05346 120 State Street Montpelier, Vermont 05602 Mr. Walter Zaluzny Chairman, Board of Selectman Vermont Yankee Decommissionirg Post Of' ice Box 116 Alliance Vernon, Vermont 05345 Box 53 Montpelier, Vermont 05602-0053 J. P. Pelletier, Plant Manager Vermont Yankee Nuclear Power Corp.

Post Office Box 157 Resident Inspector Vernon, Vermont 05354 U. S. Nuclear Regulatory Conmission Raymond N. McCandless Post Office Box 176 Vernon, Verrent 05354 Vermont Division of Occupational

& Radiological Health Vermont Public Interest Administration Building Research Group, Inc.

'10 Baldwin Street 43 State Street Montpelier Vermont 05602 Montpelier, Vermont 05602 Honorable John J. Easton Thomas A. Murley Attorney General Regional Adninistrator State of Vermont Region I Office 109 State Street U. S. Nuclear Regulatory Corr.ission Montpelier, Vermont 05602 631 Park Avenue King of Prussia, Pennsylvania 19406 John A. P.itscher, Esquire Ropes & Gray i r

225 Franklin Street Boston, Massachusetts 02110 '

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