ML093430116

Inspection of Divider Plate Weld Joint in the Replacement Steam Generators

ML093430116
Person / Time
Site:	San Onofre
Issue date:	12/07/2009
From:	St.Onge R Southern California Edison Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
Download: ML093430116 (2)

Text

SOUTHERN CALIFORNIA Richard J. St. Onge EDISON Director Nuclear Regulatory Affairs An EDISON INTERNATIONAL Company December 7, 2009 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 20555

Subject:

Docket Nos. 50-361 and 50-362 Inspection of Divider Plate Weld Joint in the Replacement Steam Generators San Onofre Nuclear Generating Station, Units 2 and 3 .

Reference:

Letter from J. R. Hall (NRC) to Southern California Edison Company (SCE), dated September 25, 2009;

Subject:

Summary of September 15, 2009, Meeting with Southern California Edison Company on Weld Defects Found in the Replacement Steam Generators Intended for Use at San Onofre Nuclear Generating Station, Unit 3 [ADAMS Accession # ML092650772]

Dear Sir or Madam:

This letter documents Southern California Edison (SCE) commitments made in a public meeting with the NRC. On September 15, 2009, a public meeting was held between the U.S. Nuclear Regulatory Commission (NRC) and representatives of SCE. During this public meeting, SCE briefed the NRC staff about weld defects discovered in replacement steam generators (RSGs) being fabricated for the San 'Onofre Nuclear Generating Station (SONGS), Unit 3, by Mitsubishi Heavy Industries (MHI) in Kobe, Japan. The meeting is summarized in the Referenced letter.

As discussed in the public meeting, SCE commits to perform additional confirmatory examinations of the divider plate welds following the installation of the RSGs for both Units 2 and 3. The examinations will consist of remote visual examinations of the accessible areas of the divider plate to channel head and tubesheet welds and repeat baseline straight beam ultrasonic examinations from the accessible locations outside the channel head. Examinations will be performed during the first steam generator inspection outage and in a steam generator inspection outage near the end of the first 1O-year inspection interval for the RSGs for each unit.

P.O. Box 128 San Clemente, CA 92674

Document Control Desk December 7, 2009 If you have any questions regarding this information, please feel free to contact Ms.

Linda 1. Conklin at (949) 368-9443.

Sincerely, Enclosures cc: E. E. Collins, Regional Administrator, NRC Region IV R. Hall, NRC Project Manager, San Onofre Units 2 and 3 G. G. Warnick, NRC Senior Resident Inspector, San Onofre Units 2 and 3