ML20132D889

Approves Use of Pvrc Damping Values,Asme B31.1 Power Piping Code for Replacement Piping Analysis & Three Dimensional Earthquake & 33 Hz Cutoff Frequency for Response Spectrum Seismic Piping Analysis

ML20132D889
Person / Time
Site:	Vermont Yankee
Issue date:	07/22/1985
From:	Vassallo D Office of Nuclear Reactor Regulation
To:	Capstick R VERMONT YANKEE NUCLEAR POWER CORP.
Shared Package
ML20132D893	List: ML20132D889 ML20132D897
References
GL-84-07, GL-84-7, NUDOCS 8508010511
Download: ML20132D889 (2)

Text

.* a July 22, 1985 Docket No. 50-271 DISTRIBUTION 1 Docket. File-NRC PDR Mr. R. W. Capstick Local PDR Licensing Engineer ORB #2 Reading Vermont Yankee Nuclear Power Corporation HThompson 1671 Worcester Road SNorris Framingham, Massachusetts 01701 RHermann DVassallo

Dear Mr. Capstick:

EJordan BGrimes

SUBJECT:

REVIEW 0F RECIRCULATION PIPING SYSTEM ANALYSIS JPartlow ACRS(10)/0 ELD Re: Vermont Yankee Nuclear Power Plant FCherny Gray File RKirkwood By let'9rs dated April 22, May 14, and July 10, 1985, you provided information describing the scope of the Recirculation System Pipe Replacement Program at Vermont Yankee and requested approval of the Pressure Vessel Research Comittee (PVRC) recommended damping values (ASME Code Case N-411) for response spectrum seismic piping analysis for the Recirculation and portions of the Residual Heat Removal (RHR) system at Vermont Yankee.

We have reviewed the information you have submitted and have determined that our review and approval of the analyses used for the Recirculation Program is necessary. We have reached this determination based on your description of changes in the analysis methods, your request for approval for use of the PVRC damping which differs from that described in your FSAR and the guidance contained in Generic Letter 84-07 with regard to 10 CFR 50.59.

We have completed our review with respect to the mechanical engineering aspects; (1) the use of PVRC damping (ASME Code Case N-411), (2) the use of the ASME B31.1 Power Piping Code for the replacement piping analysis and (3) the use of three dimensional earthquake and 33 Hz cutoff frequency for the analysis and find the methods to be acceptable. The staff review of the structural engineering aspects of the replacement program are under review and will be the subject of separate correspondence.

A copy of our Safety Evaluation is enclosed Sincerely, 8500010511 850722

[A 05Nh Domenic B. Vassallo, Chief Operating Reactors Branch #2 Division of Licensing

Enclosure:

As stated-cc/w enclosure: See next page ORB #2:DL ORB 2:D MEB:DE7,d, 2:DL SNo c -

He FChert(y' DVassallo 07/11/85 07/R/85 07/)]/85 07/fM85

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

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

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

R. D. 5, Box 169 Ferry Road R. D. 5 Box 169 Ferry Road Brattleboro, Vermont 05301 Brattleboro, Vemont 05301 Mr. Donald Hunter, Vice President Mr. Gerald Tarrant , Comissioner Vemont Yankee Nuclear Power Corp. Vermont Department of Public Service 1671 Worcester Road 120 State Street Framingham, Massachusetts 01701 Montpelier, Vemont 05602 New England Coalition en Nuclear Pollution Hill and Dale Fam Public Service Board R. D. 2, Box 223 Putney, Yemont 05346 State of Vemont 120 State Street Montpelier, Vermont 05602 Mr. Walter Zaluzny Chaiman, Board of Selectman Vermont Yankee Decommissioning 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, Vemont 05354 U. S. Nuclear Regulatory Corr.ission Raymond N. McCandless Post Office Box 176 Vernon, Vemnnt. 05354 Vermont Division of Occupational

& Radiological Fealth Administration Building Vemont Public Interest Research Group, Inc.

10 Baldwin Street 43 State Street Montpelier, Vemont 05602 Montpelier, Vermont 05602 Honorable John J. Easton Thomas A. Murley Attorr.ey General Regional Administrator State of Vermont Region I Office 109 State Street U. S. Muclear Regulatory Comission Montpelier, Vermont 05602 i 631 Park Avenue King of Prussia, Pennsylvania 19406 John A. P.itscher, Esquire Ropes & Gray 225 Franklin Street Boston, Massachusetts 02110