ML20211N032

Forwards SE Concluding That Util Adequately Addressed Actions Requested in GL 95-07, Pressure Locking & Thermal Binding of Safety-Related Power-Operated Gate Valves

ML20211N032
Person / Time
Site:	Callaway
Issue date:	09/02/1999
From:	Donohew J NRC (Affiliation Not Assigned)
To:	Randolph G UNION ELECTRIC CO.
Shared Package
ML20211N037	List: ML20211N032 ML20211N045
References
GL-95-07, TAC-M93443, NUDOCS 9909100031
Download: ML20211N032 (3)

Text

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NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20e06-0001 September 2, 1999 Mr. Garry L. Randolph Vice President and Chief Nuclear Officer Union Electric Company Post Office Box 620 Fulton, MO 65251

SUBJECT:

GENERIC LETTER 95-07, " PRESSURE LOCKING AND THERMAL BIND'NG OF SAFETY-RELATED POWER-OPERATED GATE VALVES" - CALLAWA'.' PLANT (TAC NO. M93443)

Dear Mr. Maynard:

On August 17,1995, the NRC issued Generic Letter (GL) 95-07, " Pressure Locking and Thermal Binding of Safety-Related Power-Operated Gate Valves," to request that licensees take actions to ensure those safety-related power-operated gate valves that are susceptible to pressure locking or thermal binding are capable of performing their safety functions. In your letter of October 10,1995 (ULNRC-03277), you stated that the requested actiores of the GL

would be implemented for Callaway Plant, Unit 1 (Callaway) and that the 180-day response would be provided by February 13,1996.

In letters of February 9 and 15,1996 (ULNRC-3327 and -3333), you submitted the 180-day response to the GL for Callaway. The staff reviewed the submittal and requested additional information in its letter dated May 30,1996. You responded to that request in your letter of June 24,1996 (ULNRC-3395) and provided the additional information. By its letter of March 15,1999, the NRC issued a second request for information and you provided the additional information in your letters of May 10 and July 28,1999 (ULNRC-4037 and t074).

In the letter of July 28,1999, you committed to complete certain long-term corrective actions for two valves by the fall 2002 refueling outage. This is addressed in Section 3.2.a of the

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j enclosed safety evaluation. Because we are relying on you meeting this commitment, you are requested to submit a letter stating the corrective actions have been completed within 3 months [

of completing the work.

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The staff has reviewed your submittals and conclude that you have adequately addressed the 5

actions requested in GL 95-07 for Callaway. This conclusion is partly based on the use of the thrust-prediction methodology developed by Commonwealth Edison Company (Comed).

Because this methodology may be revised in the future, the staff considers that you must control the use of this methodology, to demonstrate that safety-related valves cren overcome AEC HLF CMEH CDP)

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9909100031 990902 PDR ADOCK 05000483 P PDR

'G. Randolph pressure locking conditions, by the requirements in Appendix B to 10 CFR Part 50 because the methodology is being used to show that safety-related valves will meet their safety functions during accidents. This is also addressed in Section 3.2.a of the enclosed safety evaluation.

This completes the staffs efforts on TAC No. M93443.

Sincerely, Jack N. Dono ew, Senior Project Manager, Section 2 Project Directorate IV & Decommissioning Division of Licensing Project Management i Office of Nuclear Reactor Regulation Docket No. 50-483

Enclosure:

Safety Evaluation cc w/ encl: See next page

Callaway Plant, Unit 1 l

! cc:

Professional Nuclear Mr. Otto L. Maynard Consulting, Inc. President and Chief Executive Officer 19041 Raines Drive Wolf Creek Nuclear Operating Corporation

- Derwood, Maryland 20855 Post Office Box 411 Burlington, Kansas 66839 j John O'Neill, Esq. j Shaw, Pittman, Potts & Trowbridge Mr. Dan 1. Bolef, President 2300 N. Street, N.W. Kay Drey, Representative Washington, D.C. 20037 Board of Directors Coalition  ;

for the Environment Mr. H. D. Bono 6267 Delmar Boulevard Supervising Engineer University City, Missouri 63130 Quality Assurance Regulatory Support Union Electric Company Mr. Lee Fritz Post Office Box 620 Presiding Commissioner Fulton, Missouri 65251 Callaway County Court House 10 East Fifth Street U.S. Nuclear Regulatory Commission Fulton, Missouri 65151 Resident inspector Office 8201 NRC Road Mr. Alan C. Passwater, Manager Steedman, Missouri 65077-1302 Licensing and Fuels Un!on Electric Company Mr. J. V. Laux, Manager Post Office Box 66149 Quality Assurance St. Louis, Missouri 63166-6149 Union Electric Company Post Office Box 620 -

Fulton, Missouri 65251

, Manager- Electric Department Missouri Public Service Commission 301 W. High Post Office Box 360 Jefferson City, Missouri 65102 Regional Administrator, Region IV i U.S. Nuclear Regulatory Commission I Harris Tower & Pavilion 611 Ryan Plaza Drive, Suite 400 Arlington, Texas 76011-8064 Mr. Ronald A. Kucera, Deputy Director Department of Natural Resources P.O. Box 176 Jefferson City, Missouri 65102 l