ML20217R072

Ack Receipt 970425 e-mail Requesting That NRC Suppl 2.206 Petition Dtd 960922 Currently Being Considered by Nrc.Nrc Has Not Identified Deficiencies in Licensee Analysis of Seismic Adequacy of Eggcrate Supports

ML20217R072
Person / Time
Site:	San Onofre
Issue date:	06/26/1997
From:	Miraglia F NRC (Affiliation Not Assigned)
To:	Dwyer S AFFILIATION NOT ASSIGNED
Shared Package
ML20217R075	List: ML20217R072 ML20217R090
References
2.206, NUDOCS 9709040168
Download: ML20217R072 (4)

Text

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. 849 p.

a k UNifEO STATES

'I NUCLEAR REGULATORY COMMISSION I WASHINGTON. D.C. 3000H001 l k...,* June 26,1997 Nr. Stephen Dwyer c/o Robert Sanregret. Esq. [h 17621 Irvine Blvd., #100 Tustin, CA 92780 l Dear Nr. Dwyert This letter acknowledges receipt of your e-mail of April 25, 1997, in which

• you requested that the U.S. Nuclear Regulatory Commission (Commission or NRC) supplement your 2.206 petition dated September 22, 1996, which is currently being considered by the NRC. In your September 22, 1996, 2.206 petition, you requested that the NRC shut down the SONGS units as soon as possible pending a complete review of the seismic design of the SONGS units based on the new information gathered from the Landers and Northridge quakes. The NRC denied your request that the Commission immediately shut down the SONGS units for the reasons contained in our reply dated November 22, 1996.

In your April 25 e-mail.to NRC Chairman Jackson, you specify your (.oncerns about the ability of the San Onofre Nuclear Generating Station (SONGS) steam generators to withstand a major seismic event. Specifically, you stated that the ability of the SONGS steam generators to withstand a major seismic event is seriously compromised by the degradation recently observed in the SONGS Unit 3 steam generator internal tube supports (oggerate supports . You requested an investigation to determine if Unit 2 has experienced degra)dation similar to-that found in Unit 3. You also stated that further seismic analysis should be performed for the SONGS steam generators and that-a retrofitting upgrade of the steam generator supports could be accomplished at I this time. The staff will treat this request separately from your original i 2.206 petition. The basis for this decision is that this concern is related  !

to the seismic adequacy of a specific structure, whereas the concern expressed )

in your September 22 petition was with the adequacy of the seismic load definition for the SONGS site.

The licensee has recently completed an evaluation of the oggerate supports and has concluded that operation with the degraded oggerate supports will not result in an unreviewed safety question as defined by Section 50.59 of Title

-10 of the code of Federal Reaulations (10 CFR 50.59). (A copy of 10 CFR 50.59 is enclosed for your information). Th1s 10 CFR 50.59 safety evaluation, a  !

copy of which is enclosed, is contained in a letter dated June 5 -1997, from i Dwight E.- Nunn, Southern California Edison Company, to_ the NRC, that forwarded /

a comprehensive evaluation of the SONGS Unit 3 steam generator oggerate /

supports. This report, which contains material referenced in the 10 CFR 50.59 safety evaluation, is available in the Local Public Document Room located at

'the Nain Library, University of California, P.O. Box 19557, Irvine, California (/

92713. Section 50.59 defines the conditions under which reactor licensees may  %[i make changes to their facilities or procedures without prior NRC approval,-and 10 CFR 50.59 may be used to evaluate the implications of unintended changes, e.g., the degraded eggerate supports, on continued plant operation.

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Mr. Stephen Dwyer -t- Dune 26, 1997 l

l The staff is reviewing the licensee's evaluation as part of its normal review of the 10 CFR 50.59 process for this licensee and will provide its final evaluation in a future inspection report. This review includes evaluating the licensee's analyses and conclusions related to the ability of the oggerate

. supports to perform their intended desi n-basis function following a postulated seismic event concurrent wit the most limiting design-basis accident. On the basis of its review to date, the staff ans not identified any deficiencies in the licensee's analysis of the seismic adequacy of the  :

eggerate supports Accordingly, there is insufficient evidence to conclude that there is a  :

-substant<al hazard to public health and safety that warrants immediate action. l Although your request for insnediate action is denied, the NRC will continue to evaluate the matters that you have raised as part of its ongoing review of the

- licensee's 10 CFR 50.59 evaluation.

Your request has been referred to me pursuant to 10 CFR 2.206 of the Commission's regulations. As provided by 10 CFR 2.206, action will be taken on your request within a reasonable time. I have enclosed for your infomation a copy of the notice that is being filed with the Office of the

-Federal Register for publication.

Sincerely.

Original Signed By Frank J. Miraglia, Acting Director Office of Nuclear Reactor Regulation

Enclosures:

1. 10 CFR 50.59

2. SONGS 10 CFR 50.59 Steam Generator Eggerate Support Safety Evaluation

3. Notice-ccw/ enc 1: See next page

• For previous concurrences see attached ORC DOCUMENT NAME: GT970339.AK 0FC PQ1VA271A. PDIV-2/PM TECH Editor

• PDIV-2/D, ., ,NRR:EMEB*

NAME ME:$F EP'eftoN B. Calure WBateman N RWessman DATE 6M/97 6 # 197 6/16/97 6/8397 6/17/97 0FC OGC* DRPW:D* ADP* NRR: 905h NAME JGoldberg JRoe RZimmeman FMiragI[ .

DATE 6/18/97 6/18/97 6f20/97 68N7 O'gi

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0FFICIA. LECORD COPY

l*. '

Mr. Stephen Dwyer June 26, 1997 I

cc w/encist Chairman, Board of Supervisors Mayor County of San Diego City of San Clemente

! 1600 Pacific Hi hway, Room 335 100 Avenida Presidio San Diego, Call ornia 92101 San Clemente, California 92672 Alan R. Watts, Esq. cc w/ enc 1 3:

Woodruff, Spradlin & Smart Mr. Dwight E. Nunn, Vice President 701 S. Parker St. No. 7000 Southern California Edison Company

. Orange,. California 92668-4702 San Onofre Nuclear Generating Station P. O. Box !!8 Mr. Sherwin Harris San Clemente, California 92674-0128

-Resource Project Manager Public Utilities Department- Mr. R. W. Krieger, Vice President City of Riverside Southern California Edison Company 3900 Main Street San Onofre Nuclear Generating Station Riverside, California 92522 P.O. Box 128 Dr. Harvey Collins, Chief Division of Drinking Water cc w/ incoming and w/ encl-3:

and Environmental Management Mr. Harold B. Ray California Department of Health Services Executive Vice President P. O. Box 942732 Southern California Edison Company Sacramento, California 94234-7320 P.O. Box 128 San Clemente, California 92674-0128 Regional Administrator, Region IV U.S. Nuclear Regulatory Commission Harris Tower & Pavilion

-611 Ryan Plaza Drive, Suite 400 Arlington,; Texas 76011-8064-Mr. Terr

-Mar,ager,y Winter Power Operations San Diego Gas & Electric Company P.O. Box 1831 San Diego, California 92112-4150 Mr. Steve Hsu -

Radiologic Health Branch

-State Department of Health Services Post Office Box 942732 Sacramento California 94234 4 Resident Inspector / San Onofre NPS c/o U.S. Nuclear Regulatory Commission Post Office Box 4329 San Clemente, California _. 92674 I

J w wwo a

o .

Mr. Stephen Dwyer DISTRIB'JTMON: (w/ enclosures)

Docket it'e (50-361 and 50-362 w/ incoming letter)

PUBLIC(w/incomingletter)

PDIV-2 Reading (w/incomingletter)

DISTRIBUTION

(w/ enclosure 3)

EDO Reading ED0-970339 J. Callan E. Jordan H. Thompson P. Norry J. Blaha s K. Cyr, OGC E. Merschoff, Region IV J. Lieberman, OE S. Collins /F. Miraglia R. Zimmerman T. Martin M. Slosson W. Travers J. Roe E. Adensam Slutatsman; M. Fields E. Peyton E. Hayden J. Kennedy OPA OCA SECY (97-0396)-

NRR Mail Room (ED0-970339 w/ incoming)

T. Harris M. Boyle (MLB4)

M. Thadans J. Goldberg, OGC T. Gwynn, Region IV K. Perkins, Region IV WCFO l

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