ML20217H533
| ML20217H533 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 03/31/1998 |
| From: | Westreich B NRC (Affiliation Not Assigned) |
| To: | Ray H SOUTHERN CALIFORNIA EDISON CO. |
| References | |
| TAC-MA0387, TAC-MA0388, TAC-MA387, TAC-MA388, NUDOCS 9804030379 | |
| Download: ML20217H533 (4) | |
Text
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- March 31, 1998 i
- Mr. Harold B. Ray Executive Vice Presioent -
Southem Califomia Edison Company
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' San Onofre Nuclear Generating Station -
P.O. Box 128 San Clemente, Califomia 92674-0128 f
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION - SAN ONOFRE, UNITS 2 AND 3 -
J REDUCED PRESSURIZER WATER VOLUME CHANGE (TAC NOS. MA0387 AND MA0388)
Dear Mr. Ray:
By letter dated December 19,1997, Southern Califomia Edison Company requested a license amendment to change the technical specifications (TS) for San Onofre Nuclear Station, Units 2 and 3.1 The proposed amendment reflects a revision to Technical Specification 3.4.9, Pressurizer, to reduce the allowable pressurizer water volume for pressurizer operability. Th:s
? change is proposed to incorporate a revised pressurizer level instrumentation total loop.
. uncertainty (TLU).-
After its review of the December 19,1997, letter, the NRC has determined that additional information is required to complete its evaluation of this proposal. Enclosed is the additional information required. Please respond within 60 days of receipt of this letter, if there are any
. questions regarding this request, please call me at (301) 415-3456.
Sincerely, ORIGINAL SIGNED BY:
Barry C. Westreich, Project Manager Project Directorate IV 2 f
Division of Reactor Projects lildV Office of Nuclear Reactor Isegu,ation Docket No. 50-361 DISTRIBUTION:
. and 50-362 3 Docket File /
ACRS PUBLIC.
KPerkins, RIV WCFO
Enclosure:
Request for Additional PDIV-2 Reading PGwynn, RIV
. Information EGA1 OGC,015B18 WBateman EPeyton cc w/ encl: See next page -
BWestreich JWermiel JClifford I DOCUMENT NAME: MA'0387.RAI OFC JDIV-2/PM.
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. Mr. R. W. Krieger Vice President -
Resident inspector / San Onofre NPS.
' Southem Califomia Edison Company c/o U.S. Nuclear Regulatory Commission San Onofre Nuclear Generating Station Post Ofrece Box 4329 -
P. O. Box 128 San Clemente, Califomia 92674 San Clemente, Califomia 92674-0128 Mayor Chairman, Board of Supervisors City of San Clemente
. County of San Diego 100 Avenida Presidio 1600 Pacific Highway, Room 335 San Clemente, Califomia 92672 San Diego, Califomia 92101 Mr. Dwight E. Nunn, Vice President Alan R. Watts, Esq.
Southem Califomia Edison Company Woodruff, Spradlin & Smart San Onofre Nuclear Generating Station
. 701 S. Parker St. No. 7000 P.O. Box 128 Orange, Califomia 92668-4702 San Clemente, Califomia 92674-0128 Mr. Sherwin Harris Resource Project Manager Public Utilities Department City of Riverside 3900 Main Street Riverside, Califomia 92522 Regional Administrator, Region IV U.S. Nuclear Regulatory Commission Harris Tower & Pavilion 611 Ryan Plaza Drive, Suite 400
- Artington, Texas 76011-8064 Mr. Terry Winter Manager, Power Operations
. San Diego Gas & Electric Company P.O. Box 1831 San Diego, Califomia 92112-4150 Mr. Steve Hsu Radiologic Health Branch Otate Department of Health Services Post Office Box 942732
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March 31, 1998 Mr. Harold B. Ray Executive Vice President Southem California Edison Company San Onofre Nuclear Generating Station P.O. Box 128 San Clemente, Califomia 92674-0128
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION - SAN ONOFRE, UNITS 2 AND 3 REDUCED PRESSURIZER WATER VOLUME CHANGE (TAC NOS. MA0387 AND MA0388)
Dear Mr. Ray:
By letter dated December 19,1997, Southem Califomia Edison Company requested a license amendment to change the technical specifications (TS) for San Onofre Nuclear Station, Units 2 and 3. The proposed amendment reflects a revision to Technical Specification 3.4.9, Pressurizer, to reduce the allowable pressurizer water volume for pressurizer operability. This change is proposed to incorporate a revised pressurizer level instrumentation total loop uncertainty (TLU).
After its review of the December 19,1997, letter, the NRC has determined that additional information is required to complete its evaluation of this proposal. Enclosed is the additional information required. Please respond within 60 days of receipt of this letter. If there are any questions regarding this request, please call me at (301) 415-3456.
Sincerely,
(
er a Bh.
estreich, Project Manager Project Directorate IV-2 Division of Reactor Projects Ill/IV Office of Nuclear Reactor Regulation Docket No. 50-361 and 50-362
Enclosure:
Request for Additional information cc w/enbi: See next page a
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k REQUEST FOR ADDITIONAL INFORMATION REDUCED PRESSURIZER WATER VOLUME SOUTHERN CALIFORNIA EDISON COMPANY. ET AL SAN ONOFRE NUCLEAR. GENERATING STATION. UNIT NOS. 2 AND 3 DOCKET NOS. 50-361 AND 50-362 The pressurizer level total loop uncertainty (TLU) was changed in the license amendment
.. request dated December 19,1997. However, no details were provided regarding the change in TLU. Please provide the calculation methodology that was used in deriving the new pressurizer-level TLU and how it is different from the original TLU calculation methodology. What guidance was used in developing this methodology (e.g., ISA-S67.04, Regulatory Guide 1.105)?
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