ML20209H750

Forwards Safety Evaluation on GL 95-07, Pressure Locking & Thermal Binding of Safety-Related Power-Operated Gate Valves, for Comanche Peak Steam Electric Station,Units 1 & 2

ML20209H750
Person / Time
Site:	Comanche Peak
Issue date:	07/15/1999
From:	Jaffe D NRC (Affiliation Not Assigned)
To:	Terry C TEXAS UTILITIES CO.
Shared Package
ML20209H755	List: ML20209H750 ML20209H766
References
GL-95-07, GL-95-7, TAC-M93449, TAC-M93450, NUDOCS 9907210061
Download: ML20209H750 (2)

Text

r Mr. C. Lanca Terry S:nior Vic3 Pr:sid:nt July 15, 1999 c & Principal Nucirr Offic::r

. TU Electric Attn: Regulatory Affairs Department P. O. Box 1002 Glen Rose, TX 76043

SUBJECT:

COMANCHE PEAK STEAM ELECTRIC STATION, UNITS 1 AND 2 - GENERIC LETTER 95-07, " PRESSURE LOCKING AND THERMAL BINDING OF SAFETY-RELATED POWER-OPERATED GATE VALVES" (TAC NOS. M93449 AND M93450)

Dear Mr. Terry:

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 that those safety-related power-operated gate valves that are susceptible to pressure locking or thermal binding cre capable of performing their safety functions.

In a letter of February 13,1996, TU Electric (the licensee) submitted its 180-day response to GL 95-07 for Comanche Peak Steam Electric Station, Units 1 and 2. The NRC staff reviewed the licensee's submittal and requested additional information in a letter dated June 18,1996. In a letter of July 18,1996, the licensee provided the additionalinformation. The licensee supplemented its 180-day response to GL 95-07 in letters dated March 14,1997, and May 25 and June 14,1999.

During the period of January 24 through March 6,1999, the NRC staff performed an inspection to review specific aspects of the licensee's operability evaluation of valves susceptible to pressure locking. This inspection is documented in NRC Inspection Report 50-445,446/99-03.

The NRC staff has reviewed the licensee's submittals and finds tnat the licensee has adequately addressed the actions requested in GL 95-07, as discussed in the enclosed Safety Evaluation. This completes the NRC staff's efforts on TAC numbers M93449 and M93450.

Sincerely, ORIGINAL SIGNED BY o David H. Jaffe, Senior Project Manager, Section 1

'- {'. p. } '

' ~

Project Directorate IV & Decommissioning 9907210061 990715 Division of Licensing Project Management DR ADOCK 05 45 Office of Nuclear Reactor Regulation Docket Nos. 50-445 and 50-446

Enclosure:

Safety Evaluation cc w/ encl: See next page DISTRIBUTION:

EDocket File' RScholl(RFS, SE only) ACRS PUBLIC ' OGC SRichards (cover Itr only)

PD#1V-1 Reading STingen KBrockman, RIV To receive a copy of this document, indicate "C" in the box - I i

OFFICE PDKyP),- PDIV-1/Lfp N PDIV-1/SC C. ,g(

NAME DJ'h4 LBerry[ h RGramm (lla DATE 1[M9 f / k/99 1/1 f/99 DOCUMENT NAME: G:\PDIV-1\ComanchePeak\ltr93449.wpd OFFICIAL RECORD COPY

[

E

'e l t.

I Comanche Peak Steam Electric Plant cc:

Senior Resident inspector Office of the Govemor U.S. Nuclear Regulatory Commission ATTN: John Howard, Director P. O. Box 2159 Environmental and Natural Glen Rose, TX 76403-2159 Resources Policy P. O. Box 12428 ',

Regional Administrator, Region IV Austin,TX 78711  :

U.S. Nuclear Regulatory Commission  !

611 Ryan Plaza Drive, Suite 400 Arthur C. Tate, Director i Arlington,TX 76011 Division of Compliance & Inspection [

Bureau of Radiation Control .

Mrs. Juanita Ellis, President Texas Department of Health -

Citizens Association for Sound Energy 1100 West 49th Street .

1426 South Polk Austin, TX 78756-3189 Dallas,TX 75224 Jim Calloway Mr. Roger D. Walker Public Utility Commission of Texas Regulatory Affairs Manager Electric Industry Analysis TU Electric P. O. Box 13326 P. O. Box 1002 Austin, TX 78711-3326 Glen Rose,TX 76043 George L. Edgar, Esq.

• Morgan, Lewis & Bockius J ,

1800 M Street, N.W. l Washington, DC 20036-5869

']

Honorable Dale McPherson l County Judge ,

l P. O. Box 851 Glen Rose, TX 76043 ,

I i

l l

l May 1999

,