ML20207L559

Requests Addl Info in Response to Questions 6,7 & 11 of RAI Re GL 96-06 Program at Vermont Yankee Nuclear Power Station

ML20207L559
Person / Time
Site:	Vermont Yankee
Issue date:	03/01/1999
From:	Croteau R NRC (Affiliation Not Assigned)
To:	Maret G VERMONT YANKEE NUCLEAR POWER CORP.
References
GL-96-06, GL-96-6, TAC-M96880, NUDOCS 9903180183
Download: ML20207L559 (3)

Text

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March 1, 1999.- '

' Mr. Gregory A.' Mar t Director of Operations j

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Vermont Yankee Nuclear Power Corporation 185 Old Ferry Road Brattleboro,'VT 05301  !

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SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION REGARDING GENERIC LETTER 96-06 PROGRAM AT VERMONT YANKEE NUCLEAR POWER STATION (TAC NO. M96880)

Dear Mr. Maret:

l Generic Letter 96-06, " Assurance of Equipment Operability'and Containment Integrity During Design-Basis Accident Conditions," dated September 30,1996, included a request for licensees to evaluato cooling water systems that serve containment air coolers to assure that they are not vulnerable to waterhammer and two-phase flow conditions. By letter dated October 30,1998, you provided a response to our July 10,1998, request for additional information (RAl) on this issue for the Vermont Yankee Nuclear Power Station. You indicated that the waterhammer 11ssue would be resolved by modifying the reactor building closed cooling water (RBCCW) system during the fall 1999 refueling cutage, but details of the modification were not yet available. We understand that details of the modification should be available soon.

in order to complete our review of the your resolution of this issue, we request that you provide a more complete response to questions 6,7, and 11 of our RAI by July 31,1999. This date was. agreed to by Mr. Jeff Meyer of your staff on February 25,1999.

Sincerely, original signed by:

Richard P. Croteau, Project Manager Project Directorate 1-2 Division of Licensing Project Management  !

Office of Nuclear Reactor Regulation

._ Docket No. 50-271 cc: See next page s DISTRIBUTION {0; Docket File PUBLIC -

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, t. WASHINGTON, D.C. 20555 4 001 8 March 1, 1999 Y. . . . . ,o Mr. Gregory A. Maret Director of Operations Vermont Yankee Nuclear Power Corporation 185 Old Ferry Road Brattleboro, VT 05301

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION REGARDING GENERIC LETTER 96-06 PROGRAM AT VERMONT YANKEE NUCLEAR POWER STATION (TAC NO. M96880)

Dear Mr. Maret:

Generic Letter 96-06, " Assurance of Equipment Operatility and Containment Integrity During Design-Basis Accident Conditions," dated September 30,1996, included a request for licensees to evaluate cooling water systems that serve containment air coolers to assure that they are not ,

vulnerable to waterhammer and two-phase flow conditions. By letter dated October 30,1998, 1 you provided a response to our July 10,1998, request for additional information (RAl) on this  :

issue for the Vermont Yankee Nuclear Power Station. You indicated that the waterhammer i issue would be resolved by modifying the reactor building closed cooling water (RBCCW) system during the fall 1999 refueling outage, but details of the modification were not yet available. We understand that details of the modification should be available soon, in order to complete our review of the your resolution of this issue, we request that you provide a more complete response to questions 6,7, and 11 of our RAI by July 31,1999. This date was agreed to by Mr. Jeff Meyer of your staff on February 25,1999.

Sincerely.

l $$

Richard P. Croteau, Project Manager I Project Directorate 1-2 Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-271 cc: See next page

G. Maret Vermont Yankee Nuclear Power Station i

CC.

Regional Administrator, Region i U. S. Nuclear Hagdatory Commission Mr. Raymond N. McCandless 475 Allendale Road Vermont Division of Occupational King of Prussia, PA 19406 and Radiological Health Administration Building Mr. David R. Lewis Montpelier, VT 05602 Shaw, Pittman, Potts & Trowbridge 2300 N Street, N.W. Mr. Gautam Scn Washington, DC 20037-1128 Licensing Manager Vermont Yankee Nuclear Power Mr. Richard P. Sedano, Commissioner Corporation Vermont Department of Public Service 185 Old Ferry Road 120 State Street,3rd Floor Brattleboro, VT 05301 Montpelier, VT 05602 Resident inspector Public Service Board Vermont Yankee Nuclear Power Station State of Vermont U. S. Nuclear Regulatory Commission 120 State Street P.O. Box 176 Montpelier, VT 05602 Vernon, VT 05354 Chairman, Board of Selectmen Mr. Peter LaPorte, Director Town of Vernon ATTN: James Muckerheide P.O. Box 116 Massachusetts Emergency Management Vernon, VT 05354-0116 Agency 400 Worcester Rd.

Mr. Richard E. McCullough P.O. Box 149C Operating Experience Coordinator Framingham, MA 01701-0317 Vermont Yankee Nuclear Power Station P.O. Box 157 Jonathan M. Block, Esq.

Governor Hunt Road Main Street Vemon, VT 05354 P. O. Box 566 Putney, VT 05346-0566 G. Dana Bisbee, Esq. l Deputy Attorney General Mr. Michael J. Daley l 33 Capitol Street Trustee and Legislative Representative I Concord, NH 03301-6937 New England Coalition on Nuclear Pollution, Inc.

Chief, Safety Unit Box 545 Office of the Attorney General Brattleboro, VT 05301 -

One Ashburton Place,19th Floor l Boston, MA 02108 l i

Ms. Deborah B. Katz Box 83 Shelburne Falls, MA 01370 l

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