ML030830576

#2 - Summary of Meeting on 3/4/03 with Pacific Gas & Electric on Resolution of Steam Generator Issues/Refueling Outage 2R11

ML030830576
Person / Time
Site:	Diablo Canyon
Issue date:	03/24/2003
From:	Shukla G NRC/NRR/DLPM/LPD4
To:
Shukla G, NRR/DLPM/LPDIV-2/415-8439
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ml	List: ML022680629 ML022830369 ML023240595 ML030830576 ML030910542 ML031640498
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Download: ML030830576 (5)

Text

March 24, 2003 LICENSEE: Pacific Gas and Electric Company FACILITY: Diablo Canyon Nuclear Power Plant, Unit 2

SUMMARY

OF MARCH 4, 2003, MEETING WITH PACIFIC GAS AND ELECTRIC COMPANY (PG&E) ON RESOLUTION OF STEAM GENERATOR ISSUES FROM THE CURRENT DIABLO CANYON POWER PLANT UNIT 2 REFUELING OUTAGE 2R11 On March 4, 2003, the NRC staff met with Pacific Gas and Electric Company to discuss their proposed resolution of steam generator issues from the current refueling outage 2R11 for the Diablo Canyon Power Plant (DCPP), Unit 2.

In the meeting the following DCPP Unit 2 steam generator issues were discussed:

 steam generator inspection scope and results,

 outside diameter stress corrosion cracking voltage growth,

 review Generic Letter 95-05, "Voltage-Based Repair Criteria for Westinghouse Steam Generator Tubes Affected by Outside Diameter Stress Corrosion Cracking," alternate repair criteria requirements,

 as found vs. predicted results,

 crack growth and voltage dependent growth concepts,

 probability of detection (POD) for tube R44C45-2H flaw,

 startup calculations and assumptions and root cause analysis,

 locked tube support plate (TSP) update,

 U-bend indications and locations,

 visual inspection results, and

 in-situ leak and pressure test results.

Also, PG&E discussed the effects of the Unit 2 steam generator inspection results on Unit 1 operability.

PG&E also provided copies of an emergency amendment for Unit 2 for NRC approval for a POD of 1.0 to one bobbin indication, contained in the DCPP Unit 2 steam generator 4 tube, at row 44, column 45, at the second tube support plate on the hot leg side for the beginning of cycle voltage distribution for the DCPP Unit 2 Cycle 12 operational assessment. [Based on a later staff review of the amendment request, it was concluded that the proposed amendment is not needed prior to restart, and thus, it will be processed as a normal amendment request.]

At the conclusion of the meeting, the staff expressed their appreciation to PG&E for the presentation.

An attendance list is provided in the attachment. The slides used during the meeting are available in ADAMS under accession number ML030640753.

/RA/

Girija S. Shukla, Project Manager, Section 2 Project Directorate IV Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-323

Enclosure:

Meeting Attendees cc w/encl: See next page

ML030830576 NRC-001 OFFICE PDIV-2/PM PDIV-2/LA PDIV-2/SC NAME GShukla EPeyton SDembek DATE 3/14/03 3/14/03 3/24/03 DOCUMENT NAME: C:\ORPCheckout\FileNET\ML030830576.wpd ATTENDANCE LIST MEETING WITH PACIFIC GAS AND ELECTRIC COMPANY (PG&E)

ON RESOLUTION OF DIABLO CANYON UNIT 2 STEAM GENERATOR ISSUES MARCH 4, 2003 PG&E L. Womack J. Tomkins P. Nugent S. Ketelsen R. Exner D. Beals A. Afzali WESTINGHOUSE R. Keating T. Pitterle FRAMATOME J. Begley J. Fleck D. Cisco NEI J. Riley R. Luckett NRC G. Shukla D. Chamberlain (R-IV)

H. Berkow C. Marschall (R-IV)

J. Donohew S. Long B. Bateman J. Davis L. Lund M. Murphy E. Murphy S. Burnell (OPA)

C. Khan A. Hodgdon (OGC)

K. Karwoski B. Weisman (OGC)

PUBLIC Dan Sulter (NGP)

Diablo Canyon Power Plant, Units 1 and 2 cc:

NRC Resident Inspector Christopher J. Warner, Esq.

Diablo Canyon Nuclear 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 Mr. David H. Oatley, Vice President Dr. Richard Ferguson, Energy Chair and General Manager Sierra Club California Diablo Canyon Nuclear Power Plant 1100 11th Street, Suite 311 P.O. Box 56 Sacramento, CA 95814 Avila Beach, CA 93424 Ms. Nancy Culver City Editor San Luis Obispo The Tribune Mothers for Peace 3825 South Higuera Street P.O. Box 164 P.O. Box 112 Pismo Beach, CA 93448 San Luis Obispo, CA 93406-0112 Chairman Mr. Ed Bailey, Radiation Program Director San Luis Obispo County Board of Radiologic Health Branch Supervisors State Department of Health Services Room 370 P.O. Box 942732 (MS 178)

County Government Center Sacramento, CA 94234-7320 San Luis Obispo, CA 93408 Mr. James D. Boyd, Commissioner Mr. Truman Burns California Energy Commission Mr. Robert Kinosian 1516 Ninth Street (MS 31)

California Public Utilities Commission Sacramento, CA 95814 505 Van Ness, Room 4102 San Francisco, CA 94102 Mr. James R. Becker, Vice President Diablo Canyon Operations Diablo Canyon Independent Safety and Station Director Committee Diablo Canyon Nuclear Power Plant ATTN: Robert R. Wellington, Esq. P.O. Box 3 Legal Counsel Avila Beach, CA 93424 857 Cass Street, Suite D Monterey, CA 93940 Mr. Gregory M. Rueger Senior Vice President, Generation and Regional Administrator, Region IV Chief Nuclear Officer U.S. Nuclear Regulatory Commission Pacific Gas and Electric Company Harris Tower & Pavillion Diablo Canyon Nuclear Power Plant 611 Ryan Plaza Drive, Suite 400 P.O. Box 3 Arlington, TX 76011-8064 Avila Beach, CA 93424