ML13308A135
| ML13308A135 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 05/28/1982 |
| From: | Rood H Office of Nuclear Reactor Regulation |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8206080001 | |
| Download: ML13308A135 (6) | |
Text
MAY 2 8 1982 Docket Nc..50-361 LICENSEES: Southern California Edison Company (SCE)
San Diego Gas and Electric Company City of Anaheim, California City of Riverside, California FACILITY:
San Onofre Nuclear Generating Station, Units2
SUBJECT:
Summary of Meeting to Discuss AFW Pump Motor Bearing Environmental Qualification On May 24, 1982, members of the NRC staff met with the San Onofre 2 licensees to discuss the above subject. Attendees at the meeting are given in Enclosure 1.
At the meeting, the licensees indicated that the AFW pump motor bearings had recently experienced failure for unknown reasons. These bearings are cast iron, and are qualified for the accident environment. This environment is an ambient temperature of 302 F and a pressure of 2.75 psig in the AFW pump room. This environment results from a break in the steam 11ee supplying steam to the funbine-driven AFW pump, which is located in the same room as the electric motor-driven AFW pumps.
The licensee stated that efforts were underway 4o determine the cause of the motor bearing failure, and to correct the problem. In the mean time, the cast iron bearings babe been replaced with Babbitt-metal bearings, in order to continue the startup test program.
The Babbitt bearings would experience a temperature of 363 F during the above-described steam line break, which is about 60 F above their maximum allowable temperature. After June 30, 1982, operation of San Onofre 2 with the unqualified Babbitt bearings is prohibited by license condition 2.c(5)a, which requires compliance with the requirements of NUREG-0588 by June 30, 1982.
At the meeting, the licensee indicated that they are considering requesting relief from the requirements of the license condition, for the AFW ppmp motor bearings, for a limited period of time while the problem with the qualified bearings is evaluated and corrected. Plant operation for a short period, such as 30 days, with unqualified bearings, would be jestified on the basis of the low probability of occurence of a break in the pipe in question. The probability argument is based on several factors, includdigg:
- 1. Short period of time -
30 days
- 2. Daily inspection of the pipe to detect incipient failure 6206080001 820528 OFFICEo PDR ADOCK 05000361 P
PDR SURNAME.
DATE NRC FORM 318 (1o/80 NRCM 0240 OFFICIAL RECORD COPY AUSGPO: 1980-329-824
- 3. Pipe in question is-short in length -
20 feet
- 4. Primary stress levels-in the pipe are low
- 5. Power would not have -exceeded 50% duning the p~riod in question At the conclusion of the meeting, the licensee indicated thatithe information presented in the meeting would be submitted by letter in the near future.
The staff suggested that a follow-up meeting be scheduled about a week before June 30, 1982, to discuss any additional information available at that time on the cause of the problem with the cast iron bearings, and the possible corrective measures to be taken, and the schedule for them.
Harry Rood, Project Manager Licensing Branch No. 3 Division of Licensing
Enclosure:
As stated cc: See next page OFFICEO..DL:..LB#3 R#3.......................................................
SURNAME d
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DATE) 5/to/82 5
82 NRC FORM 31810/80) NRCM 0240 OFFICIAL RECORD COPY AUSGPO:1980-329-824
1r. RDobert Dietch Vice President Southern California Edison Company 2244 Walnut Grove Avenue P. 0. Sox 800 Rosemlead, California 91770 Mr. Gary D. Cotton Mr. Louis Bernath San Digo3 Gs & Electric Comonany 101 s
Street P. 0.
Box 1331 San Diego, California 92112 cc:
C-arles R. Kocher, Esq.
J3a7es A. Beoletto, Esq.
Southern California Edison Comipany 244 W a1nut -Drove Avenue P. 0. Box 800 Rosemead, California 91770 Orrick, Herrington & Sutcliffe ATTN:
David R. Pigott, Esq.
600 Montgomery Street San Francisco, California 94111 Mr. Georae Caravalho City Manager City of San Clemente 100 Avenido Presidio San Clemente, California 92672 Alan R. Watts, Esq.
Rourke & Woodruff Suite 1020 1055 North Main Street Santa Ana, California 92701 Lawrence Q. Garcia, Esq.
California Public Utilities Commission 5066 State Building San Francisco, California 94102 Mr. V. C. Hall Combustion Engineering, Incorporated 1000 Prospect Hill Road Windsor, Connecticut 06095
cc:
Mr. S. McClusky Bechtel Power Corporation P. 0. Box 60860, Terminal Annex Los Angeles, California 90060 Mr. Mark Medford Southeon-California Edison Company 2244 Walnut Grove Avenue P. 0. Box 800 Rosemead, California 91770 Henry Peters San Diego Gas & Electric Company P. 0. Box 1831 San Diego, California 92112 Ms. Lyn Harris Hicks Advocate for GUARD 3908 Calle Ariana San Clemente, California 92672 Richard J. Wharton, Esq.,
'Uriversity of San Diego School of Law Environmental Law Clinic San Diego, California 92110 Phyllis M. Gallagher, Esq.
Suite 222 1695 West Crescent Avenue Anaheim, California 92701 Mr. A. S. Carstens 2071 Caminito Circulo Norte Mt. La Jolla, California 92037 Resident Inspector, San Onofre/NPS c/o U. S. Nuclear Regulatory Commission P. 0. Box 4329 San Clemente, California 92672 Charles E. McClung, Jr., Esq.
Attorney at Law 24012 Calle de la Plata Suite 330 Laguna Hills, California 92653
ATTENDEES May 24, 1982 Meeting to Discuss AFW Pump Motor Bearing Qualification San Onore 2 H. Rood NRC - DL - LB3 Gerard Van Noordenren Southern California Edison Ed Richmodson BECHTEL Power M. Medford Southern California Edison Robert J. Wright NRC/NRR/DDE/EQB Bob Gramm NRC/9SI/ASB Bernie Mann NRR/DSI/RSB Richard Lobel NRR/DSI/ASB Olan Parr NRR/DSI/ASB OFFICEO SURNAMEO BCATE NRcrORMa3tene1t/o)
M c240 OFFICIAL RECORD COPY susGPO 180-329-824
MEETING
SUMMARY
DISTRIB
)N Document Control (50- 361)
LPDR PDR NSIC TERA LB#3 Files IJLee HRond PM Attorney, OELD I&E Regional Administrator, RegionV NRC Participants cc:
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