ML20209D785

Requests That San Onofre Nuclear Generating Station Be Included as One of Several Reference Plants in GSI-191 Study

ML20209D785
Person / Time
Site:	San Onofre
Issue date:	06/16/1999
From:	Jocelyn Craig NRC OFFICE OF NUCLEAR REGULATORY RESEARCH (RES)
To:	Nunn D SOUTHERN NUCLEAR OPERATING CO.
References
REF-GTECI-*****, REF-GTECI-NI NUDOCS 9907140028
Download: ML20209D785 (3)

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UNITED STATES j

j-NUCLEAR REGULATORY COMMISSION

% * * * * /g WASHINGTON, D.C. 20066 4 001 June 16, 1999-Mr. Dwight E. Nunn, Vice President

' Engineering & Technical Services

. Southern California Edison Company San Onofre Nuclear Generating Station P.O. Box 128 San Clemente, Califomia 92674-0128

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SUBJECT:

USE OF SAN ONONMTTdNiEN!! HATING STATION AS A GENERIC SAFETY ISSUE 191 REFERENCE PLANT

'99 JUN 18 A10:10

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Dear Mr. Nunn

. Currently, the NRC is in the process of r6-evaluating the effect of debris accumulation on sump performance. The re-evaluation has been designated GSI 191, " Assessment of Debris

' Accumulation on PWR Sump Performance." In order to help ensure the successful resolution of 1

GSI-191, the NRC has decided to utilize a number of reference plants to develop a containment i

~ and ECCS sump design information base representative of operating PWRs which would be used

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in our generic studies to achieve this goal. We would like to include San Onofre Nuclear l

Generating Station as one of the several reference plants in the GSI 191 study.

Reference plants will be requested to:

(1) Accommodate one plant visit to tour containment (if possible), tour sump area (if possible),

. and review plant drawings.

(2) Accommodate one or two meetings (at site or via telephone conference) between plant personnel responsible for containment, sump, and accident analysis with NRC sta'f from the j

Office of Nuclear Regulatory Research.

(3) Provide copies of plant evaluation, P&lD, and detail drawings.

. It should be noted that the plant visit is not an inspection nor audit. It can best be characterized as -

a meeting to facilitate the gathering of information and plant specific insights to ensure that our studies are realistic. The information collected will be used in the GSI-191 study being conducted by the Office of Nuclear Regulatory Research. The names of reference plants will not be used in publications or presentations. Also, reference p! ants will be given an opportunity to review documents prior to publications to ensure that their plant is correctly represented.

t in March 1999, Mr. Aleck Serkiz of my staff, visited your plant to gain insignts into the condition of Class I coatings in the SONGS Unit 3 containment and to make arrangement to obtain coating

.o 3 samples for shipment to Westinghouse Savannah River Technical Center. During a tour of the gf containment,'a number of digital photographs were taken by Mr. Jon Cavallo, Corrosion Control

. Consultants and Labs, Inc., of the coatings and area around the emergency sump. We would appreciate receiving a copy of those photographs in digital format. Mr. Serkiz also held discussions with plant staff regarding plant elevation drawings, containment layout drawings, and sump design / fabrication drawings. Mr. Michael McBrearty of your staff has copies of the drawings that were discussed. We would appreciate your sending those copies to: Dr. D.V.

Rao, Los Alamos National Laboratory, P.O. Box 1663, MS K557, Los Alamos, NM 87544.

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o Dwight E. Nunn >

If you need rnore information regarding the role of reference plants in the GSI-191 study or the GSI 191 study, please contact Mr. Michael Marshall (301-415-5895) or Mr. Aleck Serkiz (301-415-6563).

Sincerely, OrtfinalsignedbyJohnW.Craig John W. Craig, Director Division of Engineering Technology Office of Nuclear Regulatory Research Distribution:

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A. Serkiz, RES R. Elliot, NRR D. Skay, NRR l

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Mr. R. W. Krieger, Vice President Mr. Harold B. Ray, Executive Vice President Southern California Edison Company Southern California Edison Company San Onofre Nuclear Generating Station San Onofre Nuclear Generating Station P. O. Box 128 P.O. Box 128 Sin Clemente, California 92674-0128 San Clemente, Califomia 92674-0128 Chairman, Board of Supervisors Mr. John Fee, Maintenance Manager Countyof San Diego Southern California Edison Company 1600 Pacific Highway, Room 335 San Onofre Nuclear Generating Station S:n Diego, Califomia 92101 P.O. Box 128 San Clemente, California 92674-0128 Alin R. Watts, Esq.

Woodruff, Spradlin & Smart Mr. M. McBrearty 701 S. Parker St. No. 7000 Southern Califomia Edison Company Orange, California 92668 4702 San Onofre Nuclear Generating Station P.O. Box 128 Mr. Sherwin Harris San Clemente, Califomia 92674-0128 R: source Project Manager Public Utilities Department Mr. R. LaBeaf Cityof Riverside Southem Califomia Edison Company 3900 Main Street '

San Onofre Nuclear Generating Station Riverside, Califomia 92522 P.O. Box 128 San Clemente, California 92674-0128 R:gional Administrator, Region IV U.S. Nuclear Regulatory Commission Harris Tower & Pavilion 611 Ryan Plaza Drive, Suite 400 Arlington, Texas 760118064 Mr. Michael Olson S:n Onofre Liaison S:n Diego Gas & Electric Company P.O. Box 1831 S:n Diego, Califomia 92112-4150 Mr. Steve Hsu R:diologic Health Branch St:te Department of Health Services Post Office Box 942732 S:cramento, Califomia 94234 R:sident inspector / San Onofre NPS c/o U.S. Nuclear Regulatory Commission Post Office Box 4329 '

S:n Clemente, Califomia 92674 Mayor City of San Clemente 100 Avenida Presidio Sin Clemente, Califomia 92672 4

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