ML18093B559
| ML18093B559 | |
| Person / Time | |
|---|---|
| Site: | Vermont Yankee File:NorthStar Vermont Yankee icon.png |
| Issue date: | 05/09/1988 |
| From: | Rooney V Office of Nuclear Reactor Regulation |
| To: | Capstick R VERMONT YANKEE NUCLEAR POWER CORP. |
| References | |
| TAC-66873, NUDOCS 8805170173 | |
| Download: ML18093B559 (4) | |
Text
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May 9, 1988 Docket No. 50-271 Mr. R. W. Capstick Licensing Engineer Vermont Yankee Nuclear Power Corporation 1671 Worcester Road Framingham, Massachusetts 01701
Dear Mr. Capstick:
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION - SURVEILLANCE TESTING OF ECCS AND SLC EQUIPMENT (TAC NO. 66873)
Re:
Vermont Yankee Nuclear Power Station We are reviewing your proposed Technical Specification change dated December 7, 1987 dealing with surveillance testing of ECCS and SLC equipment.
We find that we need additional information as described in the enclosed request for additional information to complete our review.
We request that you provide a response to the enclosed request within 60 days of receipt of this letter.
The reporting and/or record keeping requirements contained in this letter affect fewer than ten respondents; therefore, OMB clearance is not required under P.L.96-511.
Enclosure:
As Stated cc w/enclosure:
See next page Sincerely, Original signed by_:
Vernon L. Rooney, Project Manager Project Directorate I-3 Division of Reactor Projects I/II DISTRIBUTION:
Docket File, NRC&Local PDRs, OGC, EJordan, JPartlow, VRooney, MRushbrook, ACRS (10), PDI-3 r/f, RWessman
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OFFICIAL RECORD COPY 8805170173 880509
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PDR ADOCK 0500027!
P PDR
REQUEST FOR ADDITIONAL INFORMATION: VERMONT YANKEE, SURVEILLANCE TESTING OF ECCS AND SLC EQUIPMENT The staff has reviewed the proposed Technical Specification changes for Emergency Core Cooling System (ECCS) and Standby Liquid Control (SLC) system testing requirements and the justification that is provided.
The underlying reasoning in the justification is that the existing testing requirements contribute to reduction of the plant safety margin due to excessive time intervals in "out-of-service" status for components and systems and due to additional challenges on components and systems.
The proposed justification is reasonable, however, there is no quantification of the claimed reduction in system reliability due to the presently required surveillance testing.
For.
example, for the core spray system, it is stated that 11by not conducting-this*
redundant pump test with one subsystem inoperable, the probability of a second subsystem failure on demand (accident signal) is reduced, and an increase in overall plant safety is thereby achieved." The ris_k avoidance claimed in the above can be estimated from component and/or system availability and reliability data. Then it can be compared to the risk avoidance due to the proposed reduction in the surveillance testing.
The requested quantification will clarify the plant safety enchancement from the technical specification change request and demonstrate the correctness of your proposal.
The staff requests that such quantification be provided for all requested surveillance tests.
I)
Mr. R. W. Capstick Vermont Yankee Nuc*l ear Power Corpora ti on cc:
Mr. J. Gary Weigand President & Chief Executive Officer Vermont Yankee Nuclear Power Corp.
R.D. 5, Box 169 Ferry Road Brattleboro, Vermont 05301 Mr. John DeVincentis, Vice President Yankee Atomic Electric Company 1671 Worcester Road Framingham, Massachusetts 01701 New Enaland Coalition on Nuclear Pollution Hill and Dale Farm R.D. 2, Box 223 Putney, Vermont 05346 Vermont Public Interest q2search Group, Inc.
43 State Street Montpelier, Vermont 05602 William Russell, Regional Administrator Region I Office U.S. Nuclear Regulatory Commission 475 Allendale Road King of Prussia, Pennsylvania 19406 Mr. R. W. Capstick Vermont Yankee Nuclear Power Corporation 1671 Worcester Road Framingham, Massachusetts 01701 John A. Ritscher, Esquire Ropes & Gray 225 Franklin Street Boston, Massachusetts 02110 Vermont Yankee Nuclear Power Station W. P. Murphy, Vice President and Manager of Operations Vermont Yankee Nuclear Power Corp.
R. D. 5, Box 169 Ferry Road Brattleboro, Vermont 05301 Mr. Gerald Tarrant, Commissioner Vermont Department of Public Service 120 State Street Montpelier, Vermont 05602 Public Service Board State of Vermont 120 State Street Montpelier, Vermont 05602 Mr. Walter Zaluzny Chairman, Board of Selectman Post Office Box 116 Vernon, Vermont 05354 Raymond N. McCandless Vermont Division of Occupational and Radiological Health Administration Building Montpelier, Vermont 05602 Honorable John J. Easton Attorney General State of Vermont 109 State Street Montpelier, Vermont 05602 Mark J. Wetterhahn, Esq.
Conner & Wetterhahn, P.C.
Suite 1050 1747 Pennsylvania Avenue, N.W.
Washington, D.C. 20006
Vermont Yankee Nuclear Power Corporation cc:
Ellyn R. Weiss, Esq.
Harmon & Weiss 2001 S Street, N.W.
Washington, D.C.
20009 David J. Mullett, Esq.
Special Assistant Attorney General Vermont Depart. of Public Service 120 State Street Montpelier, VT 05602 Jay Gutierrez Regional Counsel USNRC, Region I 475 Allendale Road King of Prussia, PA 19406 G. Dana Bisbee, Esq.
Office of the Attorney General Environmental Protection Bureau State House Annex 25 Capitol Street Concord, NH 03301-6397 Atomic Safety and Licensing Board U.S. Nuclear Regulatory Commission Washington, DC 20555 Mr. Glenn 0. Bright Administrative Judge Atomic Safety and Licensing Board U.S. Nuclear Regulatory Commission
.Washington, DC 20555 Vermont Yankee Nuclear Power Station Resident Inspector U.S. Nuclear Regulatory Commission P.O. Box 176 Vernon, Vermont 05354 Carol S. Sneider, Esq.
Assistant Attorney General Office of the Attorney General One Ashburton Place, 19th Floor Boston, MA 02108 Geoffrey M. Huntington, Esquire Office of the Attorney General Environmental Protection Bureau State House Annex 25 Capitol Street Concord, NH 03301-6397 Charles Bechhoefer, Esq.
Administrative Judge Atomic Safety and Licensing Board U.S. Nuclear Regulatory Commission Washington, DC 20555 Dr. James H. Carpenter Administrative Judge Atomic Safety and Licensing Board U.S. Nuclear Regulatory Commission Washington, DC 20555 Adjudicatory File (2)
Atomic Safety and Licensing Board*
Panel Docket U.S. Nuclear Regulatory Commission Washington, D.C. 20555