ML13330B233
| ML13330B233 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 07/15/1987 |
| From: | Dudley R Office of Nuclear Reactor Regulation |
| To: | Baskin K Southern California Edison Co |
| References | |
| TAC-65087 NUDOCS 8707230443 | |
| Download: ML13330B233 (4) | |
Text
JUL 15 1987 Docket No.:
50-206 DISTRIBUTION Docket File >
NRC/Local PDRs Mr. Kenneth P. Baskin PD5 Plant File Vice President, Nuclear Engineering GHolahan/JLee Safety and Licensing Department RDudley/EJordan Southern California Edison Company JPartlow/ACRS (10) 2244 Walnut Grove Avenue OGC-Bethesda Post Office Box 800 JCraig Rosemead, California 91770 DShum
Dear Mr. Baskin:
SUBJECT:
TRANSAMERICA-DELAVAL, INC. (TDI) DIESEL ENGINE RELIABILITY AND OPERABILITY (TAC NO. 65087)
Re:
San Onofre Nuclear Generating Station, Unit 1 (SONGS-1)
The NRC staff has reviewed your March 25, 1987 submittal regarding transient torsional stresses in the crankshafts of the TD1 diesel engines used as emergency generators at SONGS-1. The staff is concerned that even after "slow-start" modifications are implemented, the design margins against fatigue for the SONGS-1 crankshafts may fall short of what is normally assumed to be the case for crankshafts in general; namely, that crankshafts are adequate for infinite fatigue life for their intended service. In order to support resolution of this issue, further justification for your position is needed.
Please provide a response to the enclosed request for additional information within 60 days of receipt of this letter.
The reporting and/or recordkeeping requirements contained in this letter affect fewer than ten respondents; therefore, OMB clearance is not required under P.L.96-511.
voginal signed by Richard F. Dudley, Jr., Project Manager Project Directorate V Division of Reactor Projects -
- III, IV, V and Special Projects
Enclosure:
As stated cc:
See next page
- See previous concurrence4
- DRSP/PDV DRSP/D:PDV RDudley:cd GWKni ton 7/13/87 7/ \\ /87 OFFICIAL RECORD COPY 8707230443 870715 PDR ADOCK 05000206 PDR
JUL 15 1987 Docket No.:
50-206 DISTRIBUTION
-Docket File NRC/Local PDRs Mr. Kenneth P. Baskin PD5 Plant File Vice President, Nuclear Engineering GHolahan/JLee Safety and Licensing Department RDudley/EJordan Southern California Edison Company JPartlow/ACRS (10) 2244 Walnut Grove Avenue OGC-Bethesda Post Office Box 800 Rosemead, California 91770 D,.6
Dear Mr. Baskin:
SUBJECT:
TRANSAMERICA-DELAVAL, INC. (TDI) DIESEL ENGINE RELIABILITY AND OPERABILITY (TAC NO. 65087)
Re:
San Onofre Nuclear Generating Station, Unit 1 (SONGS-1)
The NRC staff has reviewed your March 25, 1987 submittal regarding transient torsional stresses in the crankshafts of the TD1 diesel engines used as emergency generators at SONGS-1. The staff is concerned that even after "slow-start"modifications are implemented, the design margins against fatigue for the SONGS-1 crankshafts may fall short of what is normally assumed to be the case for crankshafts in general; namely, that crankshafts are adequate for infinite fatigue life for their intended service. In order to support resolution of this issue, further justification for your position is needed.
Please provide a response to the enclosed request for additional information within 60 days of receipt of this letter.
The reporting and/or recordkeeping requirements contained in this letter affect fewer than ten respondents; therefore, OMB clearance is not required under P.L.96-511.
"I signed by Richard F. Dudley, Jr., Project Manager Project Directorate V Division of Reactor Projects -
- III, IV, V and Special Projects
Enclosure:
As stated cc:
See next page DRSP/PDV DRSP/D:PDV RDudley:cd GWKnighton 7/
/87 7/ /87 OFFICIAL RECORD COPY
Mr. Kenneth P. Baskin San Onofre Nuclear Generating Southern California Edison Company Station, Unit No. 1 cc Charles R. Kocher, Assistant Mr. Joseph 0. Ward, Chief General Counsel Radiological Health Branch James Beoletto, Esquire State Department of Health Southern California Edison Company Services Post Office Box 800 714 P Street, Office Bldg. 8 Rosemead, California 91770 Sacramento, California 95814 David R. Pigott Mr. Hans Kaspar, Executive Director Orrick, Herrington & Sutcliffe Marine Review Committee, Inc.
600 Montgomery Street 531 Encinitas Boulevard, Suite 105 San Francisco, California 94111 Encinitas, California 92024 Mr. Stephen B. Allman Dennis M. Smith, Chief San Diego Gas & Electric Company Radiological Programs Division P. 0. Box 1831 Governor's Office of Emergency Svcs.
San Diego, California 92112 State of California 2800 Meadowview Road Sacramento, CA 95832 Resident Inspector/San Onofre NPS c/o U.S. NRC P. 0. Box 4329 San Clemente, California 92672 Mayor City of San Clemente San Clemente, California 92672 Chairman Board of Supervisors County of San Diego San Diego, California 92101 Director Energy Facilities Siting Division Energy Resources Conservation &
Development Commission 1516 -
9th Street Sacramento, California 95814 Regional Administrator, Region V U.S. Nuclear Regulatory Commission 1450 Maria Lane Walnut Creek, California 94596
REQUEST FOR ADDITIONAL INFORMATION After review of the licensee's March 25, 1987 submittal, the staff is concerned that the option chosen for reducing crankshaft stresses does not meet the recommendations in Section 2.1.3.12 of the staff's January 28, 1987 Safety Evaluation Report. The staff believes that even after "slow-start" modifications are implemented, the design margins against fatigue for the San Onofre crank shafts may fall short of what is normally assumed to be the case for crankshafts in general; namely, that crankshafts are adequate for infinite fatigue life for their intended service. In order to support resolution of this issue the staff will evaluate the licensee's proposed corrective action. However, further justification for the licensee's position is needed. Therefore, we request that the licensee provide the data and analyses methods that support the diesel vendor's conclusions. Sufficient detail and explanation should be provided so that an independent review of the analyses can be performed.