ML20140F088

Forwards RAI Re Amend Application Numbers 167 & 153.Amend Requests That Staff Approve Rev to SR 3.8.1.8

ML20140F088
Person / Time
Site:	San Onofre
Issue date:	04/29/1997
From:	Fields M NRC (Affiliation Not Assigned)
To:	Nunn D SOUTHERN CALIFORNIA EDISON CO.
References
TAC-M98452, TAC-M98453, NUDOCS 9705020098
Download: ML20140F088 (4)

Text

-- - - - - . - - - - . . - _ _ _ _ ..

. . o l

April 29, 1997 Mr. Dwight E. Nunn Vice President Southern California Edison Company l San Onofre Nuclear Generating Station P. O. Box 128 San Clemente, California 92674-0128

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION REGARDING AMENDMENT APPLICATION j NUMBERS 167 AND 153 - SAN ON0FRE NUCLEAR GENERATING STATION, UNITS 2 AND 3,(TAC NOS. M98453 AND M98452)

Dear Mr. Nunn:

i The staff is reviewing Southern California Edison's proposed Technical Specification amendment requesting the staff approve a revision to

< Surveillance Requirement 3.8.1.8. In order for the staff to complete its review of your proposal by the deadline requested, we will need responses to the enclosed set of questions by May 5, 1997.

! Sincerely,

\

l Original Signed By l

l Mel B. Fields, Project Manager j Project Directorate IV-2 i Division of Reactor Projects III/IV Office of Nuclear Reactor Regulation Docket Nos. 50-361 DISTRIBUTION:

and 50-362 Docket File l PUBLIC

Enclosure:

Request for Additional PDIV-2 Reading Information JRoe EAdensam cc w/ encl: See next page WBateman /

MFields /

EPeyton /

ACRS /

OGC, 015818 KPerkins, RIV/WCF0 AHowell, RIV PGlynn, Region IV h/

JCal vo DOCUMENT NAME: TRANSFOR. NUN OFC PDIV-2/PM PDIV-2/LA NAME MFddds:ye EM Mh hN hh DATE 4/2T/97 4/ @ 97 _

0FFICIAL RECORD COPY

( 4 r?19 i

9705020098 970429 PDR ADOCK 05000361 P PDR ,

pwoo

, e-  % UNITED STATES S S NUCLEAR REGULATORY COMMISSION e 'f WASHINGTON, D.C. 20616 0001

% ,,,,,+ April 29, 1997 Mr. Dwight E. Nunn Vice President Southern California Edison Company San Onofre Nuclear Generating Station P. O. Box 128 San Clemente, California 92674-0128

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION REGARDING AMENDMENT APPLICATION NUMBERS 167 AND 153 - SAN ON0FRE NUCLEAR GENERATING STATION, UNITS 2 AND 3 (TAC NOS. M98453 AND M98452) 1

Dear Mr. Nunn:

The staff is reviewing Southern California Edison's proposed Technical Specification amendment requesting the staff approve a revision to Surveillance Requirement 3.8.1.8. In order for the staff to complete its review of your proposal by the deadline requested, we will need responses to the enclosed set of questions by May 5, 1997.

Sincerely, ,

$# A Mel B. Fields, Project Manager Project Directorate IV-2 Division of Reactor Projects III/IV Office of Nuclear Reactor riegulation Docket Nos. 50-361 and 50-362

Enclosure:

Request for Additional Information cc w/ enc 1: See next page

. - _ m j Mr. Dwight E. Nunn April 29, 1997 l

l cc w/ encl:

Mr. R. W. Krieger, Vice President Resident Inspector / San Onofre NPS Southern California Edison Company c/o U.S. Nuclear Regulatory Commission l San Onofre Nuclear Generating Station Post Office Box 4329 l P. O. Box 128 San Clemente, California 92674 San Clemente, California 92674-0128 Mayor i Chairman, Board of Supervisors City of San Clemente l County of San Diego 100 Avenida Presidio 1600 Pacific Highway, Room 335 San Clemente, California 92672 l San Diego, California 92101 l Mr. Harold B. Ray l Alan R. Watts, Esq. Executive Vice President Woodruff. Spradlin & Smart

, Southern California Edison Company 701 S. Parker St. No. 7000 San Onofre Nuclear Generating Station Orange, California 92668-4702 P.O. Box 128 San Clemente, California 92674-0128 Mr. Sherwin Harris Resource Project Manager Public Utilities Department City of Riverside 3900 Main Street Riverside, California 92522 Dr. Harvey Collins, Chief Division of Drinking Water and Environmental Management California Department of Health Services P. O. Box 942732 Sacramento, California 94234-7320 Regional Administrator, Region IV U.S. Nuclear Regulatory Commission Harris Tower & Pavilion 611 Ryan Plaza Drive, Suite 400 Arlington, Texas 76011-8064 Mr. Terry Winter Manager, 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 l Sacramento, California 94234 l

RE0 VEST FOR ADDITIONAL INFORMATION RELATED TO AMENDMENT APPLICATION NUMBERS 167 AND 153 SAN ON0FRE NUCLEAR GENERATING STATION. UNITS 2 AND 3 DOCKET NOS. 50-361 AND 50-362 (1) What is the surveillance frequency of the reserve auxiliary transformers (RATS) and unit auxiliary transformers (UATs), and when were the last surveillances performed on these transformers?

(2) Provide the specifications for the RATS and the UATs, including their impedances.

(3) Is a UAT capable of supporting the LOCA loads of one unit and the safe shutdown loads of other unit? What tests were performed to demonstrate this capability?

(4) Provide drawings showing the connection to the opposite unit's RAT and UAT.

(5) Describe the protection and coordination process when the UAT will be ,

used as the second source of offsite power for the opposite unit.

(6) Discuss the adequacy of voltage and frequency at the load terminal when )

the UAT will be used as the second source of offsite power for the opposite unit.

(7) Discuss the control power availability for the required breakers when the UAT will be used as the second source of offsite power for the opposite unit. l (8) Provide the details of the overlapping tests referred to in the l amendment application submittal. '

(9) Discuss the impact of short circuit current on circuit breakers when the UAT is the second source of offsite power for the opposite unit.

, (10) Verify that the UAT for 4160 V bus A06 is XVI.

i (11) Discuss the possibility of connecting the X-winding of XR1 and Y-winding i of XVI to 4160 V bus A04.

l l

t I

t

,