ML16342B875

Advises That Util 910813 Response to Suppl 2 to NRC Bulletin 89-001,acceptable

ML16342B875
Person / Time
Site:	Diablo Canyon
Issue date:	04/29/1992
From:	Rood H Office of Nuclear Reactor Regulation
To:	Rueger G PACIFIC GAS & ELECTRIC CO.
References
IEB-89-001, IEB-89-1, TAC-M81611, TAC-M81612, NUDOCS 9205070238
Download: ML16342B875 (6)

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April 29, 1992 Docket Nos.

50-275 and 50-323 Hr. Gregory H. Rueger Senior Vice President and General Manager Nuclear Power Generation Business Unit Pacific Gas and Electric Company 77 Beale Street, Room 1451 San Francisco, California 94106

SUBJECT:

CLOSEOUT OF STAFF ACTIVITIES ON NRC BULLETIN 89-01, SUPPLEMENT 2

FOR DIABLO CANYON (TAC NOS.

H81611 AND H81612)

On June 28, 1991, the NRC staff issued Supplement 2 to NRC Bulletin (NRCB) 89-01, "Failure of Westinghouse Steam Generator Tube Mechanical Plugs."

Supplement 2 to the Bulletin requested that actions similar to those requested in NRC Bulletin 89-01 be extended to include all Westinghouse mechanical plugs fabricated from thermally treated Inconel 600.

These actions are necessary to ensure that these plugs will continue to provide adequate assurance for reactor coolant system pressure boundary integrity under normal operating conditions, transients, and postulated accidents.

By letter DCL-91-203 dated August 13,

1991, you responded to Supplement 2 to the Bulletin by providing the information requested in the Actions Re uested portion.

The NRC staff has reviewed your response and finds the information

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and planned/accomplished actions to be acceptable.

This completes the staff effort on Supplement 2 to NRC Bulletin 89-01 for Diablo Canyon and closes. TAC Nos.

H81611 and H81612.

Sincerely, cc:

See next page Original Signed By:

Harry Rood, Senior Project Manager Project Directorate V

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UNITED STATES NUCLEAR REGULATORY COMIVIISSION WASHINGTON, D.C. 20555 April 29, 1992 Docket Nos.

50-275 and 50-323 Mr. Gregory H. Rueger Senior Vice President and General Manager Nuclear Power Generation Business Unit Pacific Gas and Electric Company 77 Beale Street, Room 1451 San Francisco, California 94106

SUBJECT:

CLOSEOUT OF STAFF ACTIVITIES ON NRC BULLETIN 89-01, SUPPLEMENT 2

FOR DIABLO CANYON (TAC NOS.

H81611 AND H81612)

On June 28, 1991, the NRC staff issued Supplement 2 to NRC Bulletin (NRCB) 89-Ol, "Failure of Westinghouse Steam Generator Tube Hechanical Plugs."

Supplement 2 to the Bulletin requested that actions similar to those requested in NRC Bulletin 89-01 be extended to include all Westinghouse mechanical plugs fabricated from thermally treated Inconel 600.

These actions are necessary to ensure that these plugs will continue to provide adequate assurance for reactor coolant system pressure boundary integrity under normal operating conditions, transients, and postulated accidents.

By letter DCL-91-203 dated August 13,

1991, you responded to Supplement 2 to the Bulletin by providing the information requested in the Actions Re uested portion.

The NRC staff has reviewed your response and finds the information and planned/accomplished actions to be acceptable.

This completes the staff effort on Supplement 2 to NRC Bulletin 89-01 for Diablo Canyon and closes TAC Nos.

H81611 and M81612.

Sincerely, Harry Roo

, Senior Project Manager Project Directorate V

Division of Reactor Projects III/IV/V Office of Nuclear Reactor Regulation cc:

See next page

AI J

Mr. Gregory M. Rueger Pacific Gas and Electric Company Diablo Canyon

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NRC Resident Inspector Diablo Canyon Nuclear Power Plant c/o U.S. Nuclear Regulatory Commission P. 0.

Box 369 Avila Beach, California 93424 Dr. Richard Ferguson, Energy Chair Sierra Club California 6715 Rocky Canyon Creston, California 93432 Ms. Sandra A. Silver Mothers for Peace 660 Granite Creek Road Santa Cruz, California 95065 Ms. Jacquelyn C. Wheeler 3303 Barranca Court San Luis Obispo, California 93401 Managing Editor The County Telegram Tribune 1321 Johnson Avenue P. 0.

Box 112 San Luis Obispo, California 93406 Chairman San Luis Obispo County Board of Supervisors Room 370 County Government Center San Luis Obispo, California 93408 Christopher J.

Warner, Esq.

Pacific Gas 8 Electric Company Post Office Box 7442 San Francisco, California 94120 Mr. Hank Kocol Radiologic Health Branch State Department of Health Services Post Office Box 942732 Sacramento, California 94234 Regional Adminstrator, Region V

U.S. Nuclear Regulatory Commiss'ion 1450 Maria Lane, Suite 210 Walnut Creek, California 94596 Mr. Peter H. Kaufman Deputy Attorney General State. of California 110 West A Street, Suite 700 San Diego,-California 92101 Ms. Nancy Culver 192 Luneta Street San Luis Obispo, California 93401 Michael M. Strumwasser, Esq.

Special Assistant Attorney General State of California Department of Justice 3580 Wil'shire Boulevard, Room 800 Los Angeles, California 90010

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