ML16342E189
| ML16342E189 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 07/23/1998 |
| From: | Steven Bloom NRC (Affiliation Not Assigned) |
| To: | Rueger G PACIFIC GAS & ELECTRIC CO. |
| References | |
| GL-97-05, GL-97-5, TAC-MA0462, TAC-MA0463, TAC-MA462, TAC-MA463, NUDOCS 9807280079 | |
| Download: ML16342E189 (6) | |
Text
Ouly 23, 1998 Mr. Gregory M. Rueger, Senior Vice President and General Manager Pacific Gas and Electric Company Nuclear Power Generation N9B P. O. Box 770000 San Francisco, California 94177
SUBJECT:
REQUEST FOR ADDITIONALINFORMATIONRELATED TO GENERIC LETTER 97 DIABLOCANYON POWER PLANT, UNITS 1 AND 2 (TAC NOS. MA0462 AND MA0463)
Dear Mr. Rueger:
In a letter dated March 17, 1998, Pacific Gas and Electric Company (PGE), submitted its 90-day response to Generic Letter (GL) 97-05, "Steam Generator Tube Inspection Techniques,"
for Diablo Canyon Power Plant, Units 1 and 2. The staff has reviewed your response and has identified the need to request additional information in order to determine the acceptability of the inspection techniques utilized at Diablo Canyon. The enclosure describes the specific information requested by the staff. Please provide your response to this information within 45 days of the date of this letter.
Ifyou have any questions regarding this matter, please contact Steven Bloom at (301) 415-1313.
Sincerely, Original Signed By Steven D. Bloom, Project Manager Project Directorate IV-2 Division of Reactor Projects III/IV Office of Nuclear Reactor Regulation Docket Nos. 50-275 and 50-323
Enclosure:
Request for Additonal Information ccw/encl: See next page Document Name:
DCA0462.RAI Docket PUBLIC PDIV-2 Reading EAdensam (EGA1)
WBateman S Bloom EPeyton OGC ACRS KPerkins, RIV WCFO PGwynn, RIV TSullivan OFC PD4-NAME SB oo PD4-2 EPeeyo DATE 7/ EP 98 7 &8/98 OFFICIAL RECORD COPY 9807280079 980723 PDR ADOCK 05000275 P
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Mr. Gregory M. Rueger Ouly 23, 1998 cc w/encl:
NRC Resident Inspector
'iablo Canyon Nuclear Power Plant c/o U.S, Nuclear Regulatory Commission P. O. Box 369 Avila Beach, California 93424 Dr. Richard Ferguson, Energy Chair Sierra Club California 1100 11th Street, Suite 311 Sacramento, California 95814 Ms. Nancy Culver San Luis Obispo Mothers for Peace P. O. Box 164 Pismo Beach, California 93448 Chairman San Luis Obispo County Board of Supervisors Room 370 County Government Center San Luis Obispo, California 93408 Mr. Truman Burns Mr. Robert Kinosian California Public Utilities Commission 505 Van Ness, Room 4102 San Francisco, California 94102 Mr. Steve Hsu Radiologic Health Branch State Department of Health Services Post Office Box 942732 Sacramento, California 94232 Diablo Canyon Independent Safety Committee ATTN: Robert R. Wellington, Esq.
Legal Counsel 857 Cass Street, Suite D Monterey, California 93940 Regional Administrator, Region IV U.S. Nuclear Regulatory Commission Harris Tower 8 Pavillion 611 Ryan Plaza Drive, Suite 400 Arlington, Texas 76011-8064 Christopher J. Warner, Esq.
Pacific Gas 8 Electric Company Post Office Box 7442 San Francisco, California 94120 Mr. Robert P. Powers Vice President and Plant Manager Diablo Canyon Nuclear Power Plant P. O. Box 56 Avila Beach, California 93424 Telegram-Tribune ATTN: Managing Editor 1321 Johnson Avenue P.O. Box 112 San Luis Obispo, California 93406
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E During the review of Pacific Gas 8 Electric Company's response to GL 97-05, "Steam Generator Tube Inspection Techniques," the staff noted one area that required additional clarification in order to assess the adequacy of inspection techniques employed at Diablo Canyon.
In this regard, provide the following'information:
t The response to GL 97-05 indicated that it was the licensee's practice to disposition steam generator tubes with suspected pit indications using eddy current sizing techniques.
Provide the basis for confirming the indications dispositioned during inspections are pits and not volumetric intergranular attack.
Ifthis determination was made by nondestructive examination techniques, describe the manner in which the technique was qualified to distinguish between the two damage modes.
Also, discuss the assessment that was completed that evaluated the applicability of EPRI's qualification of the pitting sizing technique (ETSS 96005) to conditions at Diablo Canyon.
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