ML20196H291

Discusses Completion of Licensing Action for GL 95-03, Circumferential Cracking of SG Tubes, Dtd 950428,for San Onofre Nuclear Generating Station,Units 2 & 3 by Ltrs Dtd 951129 & 0627

ML20196H291
Person / Time
Site:	San Onofre
Issue date:	07/22/1997
From:	Fields M NRC (Affiliation Not Assigned)
To:	Ray H SOUTHERN CALIFORNIA EDISON CO.
References
GL-95-03, GL-95-3, TAC-M92271, TAC-M92272, NUDOCS 9707250066
Download: ML20196H291 (3)

Text

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O 1 UNITED STATES l

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E NUCLEAR REGULATORY COMMISSION - / l ph[L h([a 8 i WASHINGTON, D.C. 206&O001 4 -

k .. .. . [I July 22,1997 Mr.. Harold B. Ray Executive Vice President Southern California Edison Company San Onofre Nuclear Generating Station  ;

P. O. Box 128 San Clemente, California 92674-0128

SUBJECT:

COMPLETION OF LICENS1NG ACTION FOR GENERIC LETTER 95-03, .

' "CIRCUHFERENTIAL CRACKING OF STEAM GENERATOR TUBES," DATED APRIL 28, )

1995, FOR SAN ONOFRE NUCLEAR GENERATING STATION, UNITS 2 AND 3 (TAC NOS. HQ2271 AND M92272)

Dear Mr. Ray:

On April 28, 1995, the U.S. Nuclear Regulatory Commission (NRC) issued Generic letter (GL) 9S-03, "Circumferential Cracking of Steam Generator Tubes," to all holders of operating licenses or construction permits for pressurized-water reactors. The NRC issued GL 95-03 for three principal reasons:  !

. 1 (1) Notify addressees about the safety significance of the recent steam generator tube inspection findings at Maine Yankee Atomic Power Station.  ;

(2) Request that all addressees implement the actions described within the generic letter.

(3) Require that all addressees submit to the NRC a written response regarding implementation of the requested actions.

4 In addition, R 95-03 alerted addressees to the importance of performing l comprehensive examinations of steam generator tubes using techniques and j equipment capable of reliably detecting the types of degradation to which the '

steam generator tubes may be susceptible. The staff also noted that the performance of steam generator tube examinations is controlled, in part, by Appendix B to Title 10, Part 50, of the Code of federal Regulations (10 CFR

Part 50).

In GL 95-03, the NRC staff also requested that licensees talte the following i actions: 1 (1) Evaluate recent operating experience with respect to the detection and sizing of circumferential indfcations to determine the applicability to their plants.

(2) On the basis of the evaluation in Item (1) above, as well as past l inspection scope and results, susceptibility to circumferential '

cracking, threshold of detection, expected or inferred crack growth D%I O )

mm9707250066 970722 NE Hlf CWIR COPY PDR ADOCK 05000361 P PDR

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Mr. Harold _B.l Ray' ,' -

July 22,1997 +

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?> -rates,Eandtother relevant factors, develop-a safety assessment U l justifying continued' operation until the next scheduled steam generator g tube inspections. ,

I (3) Develop plans for the next steam generator tube inspections as they-pertain to the detection of circuaiferential cracking. The inspection plans should address, but not' be limited to, scopc (including sample expansion' criteria, if applicable), methods, equipment, and criteria i l'

(including personnel trainingland qualification). "

m To document the outcome of these actions, the NRC staff requested that

[' addressees prepare and submit the following:

^ *" A safety assessment justifying continued operation, predicated on the (1)

U evaluation performed in accordance with requested actions 1 and 2

[ (above).

o f' '(2) A stminary of the inspection plans developed in accordance with requested

action 3 (above) and a sch.'dule for the next planned inspection.

, n

In retponse to GL 95-03, you provided letters dated November 29, 1995 and June 27, 1995 for San Onofre Nuclear Generating Station, Units 2 and 3. These 4

wbmittais provided the information requested by GL 95-03; therefore TAC Nos.

M92271 and M92272 are closed. For your'information, the staff's findings l- regarding this issue are contained in NUREG-1604, "Circumferential Cracking of U p ,

. Steam Generator Tubes."

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$ If you have any questions regarding this matter, please contact me at (301) l

415-3062.  !

1

l. Sincerely, 5 Original Signed By I i Nel B. Fields, Project Manager ,1 1 Project Directorate IV-2 .]

t Division of Reactor Projects III/IV j Office of Nuclear Reactor Regulation  !

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Docket Nos. 50-361 DISTRIBUTLON:  !

( and 50-362 $0mcketdi:sy EPeyton  !

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• g,r fe Mr.. Harold.BtRay '

July 22,1997o 4

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Mr. R.,W. Krieger.'Vice President Resident Inspector / San Onofre NPS Southern California Edison Company ;c/o U.S. . Nuclear Regulatory Commission

, . San 0nofre Nuclear Generating Station Post Office Box 4329 LP. O. Box 128-iSan Clemente. California 92674 L San Clemente. California E 92674-0128.

I' Mayor

' Chairman. Board of Supervisors-City of San Clemente

[

J County'of San Diego, .100 Avenida Presidio 1600 Pacific Highway.uRoom 335 San Clemente. California 92672 4 Saa Diego California -92101- ..

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Mr. Dwight E. Nunn. Vice. President

[ - Alan R. Watts. Esq.

.. Southern California Edison Company i Woodruff. Spradlin & Smart San Onofre Nuclear Generating Station

' 791 S. Parker St. No'. .7000 P.O. Box 128

. -Orange. Cal.ifornia. 92668 4702t San Clemente. California 92674-0128

.: :Mr. Sherwin Harris Resource. Project Manager

Public Utilities Department

.- City of Riversic'e i; ;3900 Main Street

.L Riverside.' California 92522 I Dr. Harvey Collins Chief j Division of Drinking Water

. .and Environmental Management.

[

California Denartment of rieaith Services P.0.' Box 942532.

[ Sacramento. California 94234-7320.

I Regional Administrator. Region IV i U.S. Nuclear Regulatory. Commission- '

s Harris Tower & Pavilion 11 611 Ryan Plaza Drive. Suite 400-

. Arlington. Texas - '76011-8064 i Mr. Terr i Manager.y Winter Power 03erations LSan Diego Gas-& Electric Company

, 'P.O. Box 1831 t

San Diego California 92112-4150

.Mr.'

Steve Hsu.

' Radiologic ' Health Branch

, State Department of Health Services Post 0ffice Box 942732-Sacramento. California 94234 I l

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