ML052620519

9/27/05, Diablo Canyon Unit 1, Response to Bulletin 2004-01, Inspection of Alloy 82/182/600 Materials Used in the Fabrication of Pressurizer Penetrations and Steam Space Piping Connections at pressurized-water Reactors.

ML052620519
Person / Time
Site:	Diablo Canyon
Issue date:	09/27/2005
From:	Shukla G NRC/NRR/DLPM/LPD4
To:	Oatley D Pacific Gas & Electric Co
SHUKLA G , NRR/DLPM/PD4, 415-8420
References
TAC MC3476
Download: ML052620519 (4)

Text

September 27, 2005 Mr. David H. Oatley, Vice President and General Manager Pacific Gas and Electric Company Diablo Canyon Power Plant P.O. Box 56 Avila Beach, CA 93424

SUBJECT:

DIABLO CANYON POWER PLANT, UNIT NO. 1 - RESPONSE TO NRC BULLETIN 2004-01, "INSPECTION OF ALLOY 82/182/600 MATERIALS USED IN THE FABRICATION OF PRESSURIZER PENETRATIONS AND STEAM SPACE PIPING CONNECTIONS AT PRESSURIZED-WATER REACTORS" (TAC NO.: MC3476)

Dear Mr. Oatley:

On May 28, 2004, the U.S. Nuclear Regulatory Commission (NRC) issued Bulletin 2004-01, "Inspection of Alloy 82/182/600 Materials Used in the Fabrication of Pressurizer Penetrations and Steam Space Piping Connections at Pressurized-Water Reactors," to the industry. This Bulletin informed addressees that current methods of inspecting the pressurizer penetrations and steam space piping connections fabricated from Alloy 82/182/600 materials may need to be supplemented with additional measures (e.g., bare-metal visual inspections) to detect pressurizer penetration and steam space piping connection flaws or leakage. The Bulletin requested that these addressees provide the NRC with information related to the materials of construction, the inspections that have been performed, and the inspections which will be performed to verify the integrity of the pressurizer penetrations and steam space piping connections. By letter dated July 27, 2004, Pacific Gas and Electric Company (PG&E) provided its response to Bulletin 2004-01, for the Diablo Canyon Power Plant, Unit No. 1 (DCPP No. 1).

By this letter, PG&E provided its responses to items 1a, 1b, 1c, and 1d of the Bulletin 2004-01.

These responses described the materials used in the fabrication of pressurizer penetrations and steam space piping connections at DCPP No. 1. When describing the materials used in the fabrication of the pressurizer penetrations and steam space piping connections, PG&E reported that none of the materials used in the fabrication of the pressurizer penetrations and steam space piping were Alloy 82/182/600 materials. Therefore, there is no specific inspection program for Alloy 82/182/600 materials for the pressurizer other than meeting the requirements of Section XI of the American Society for Mechanical Engineers, Boiler and Pressure Vessel Code.

Given PG&Es response to items 1a, 1b, 1c, and 1d of the Bulletin, the NRC staff no longer requires a specific response for the DCPP No. 1 for item 2 of the Bulletin, which requested that licensees report the results of their next scheduled inspection of Alloy 82/182/600 pressurizer penetrations and steam space piping connections.

D. Oatley The NRC staff has completed its activities associated with the review of your response to Bulletin 2004-01 for DCPP No. 1 and finds your response acceptable. If you have any questions regarding this matter, please contact me at (301) 415-8439.

Sincerely,

/RA/

Girija S. Shukla, Project Manager, Section 2 Project Directorate IV Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-275 cc: See next page

D. Oatley The NRC staff has completed its activities associated with the review of your response to Bulletin 2004-01 for DCPP No. 1 and finds your response acceptable. If you have any questions regarding this matter, please contact me at (301) 415-8439.

Sincerely,

/RA/

Girija S. Shukla, Project Manager, Section 2 Project Directorate IV Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-275 cc: See next page DISTRIBUTION:

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NAME GShukla LFeizollahi DCollins DATE 9/22/05 9/22/05 9/27/05 OFFICIAL RECORD COPY

Diablo Canyon Power Plant, No. 1 cc:

NRC Resident Inspector Richard F. Locke, Esq.

Diablo Canyon Power Plant Pacific Gas & Electric Company c/o U.S. Nuclear Regulatory Commission P.O. Box 7442 P.O. Box 369 San Francisco, CA 94120 Avila Beach, CA 93424 City Editor Sierra Club San Lucia Chapter The Tribune c/o Henriette Groot 3825 South Higuera Street 1000 Montecito Road P.O. Box 112 Cayucos, CA 93430 San Luis Obispo, CA 93406-0112 Ms. Nancy Culver Mr. Ed Bailey, Chief San Luis Obispo Radiologic Health Branch Mothers for Peace State Department of Health Services P.O. Box 164 P.O. Box 997414 (MS 7610)

Pismo Beach, CA 93448 Sacramento, CA 95899-7414 Chairman Mr. James D. Boyd, Commissioner San Luis Obispo County Board of California Energy Commission Supervisors 1516 Ninth Street (MS 31)

Room 370 Sacramento, CA 95814 County Government Center San Luis Obispo, CA 93408 Mr. James R. Becker, Vice President Diablo Canyon Operations Mr. Truman Burns and Station Director Mr. Robert Kinosian Diablo Canyon Power Plant California Public Utilities Commission P.O. Box 3 505 Van Ness, Room 4102 Avila Beach, CA 93424 San Francisco, CA 94102 Jennifer Tang Diablo Canyon Independent Safety Field Representative Committee United States Senator Barbara Boxer ATTN: Robert R. Wellington, Esq. 1700 Montgomery Street, Suite 240 Legal Counsel San Francisco, CA 94111 857 Cass Street, Suite D Monterey, CA 93940 Regional Administrator, Region IV U.S. Nuclear Regulatory Commission Harris Tower & Pavillion 611 Ryan Plaza Drive, Suite 400 Arlington, TX 76011-8064 March 2005