ML13324A593
| ML13324A593 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 04/16/1985 |
| From: | Medford M SOUTHERN CALIFORNIA EDISON CO. |
| To: | Zwolinski J Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8504180277 | |
| Download: ML13324A593 (3) | |
Text
Southern California Edison Company P. 0. BOX 800 2244 WALNUT GROVE AVENUE ROSEMEAD. CALIFORNIA 91770 M.O.MEDFORD TELEPHONE MANAGER, NUCLEAR LICENSING (818) 302-1749 April 16, 1985 Director, Office of Nuclear Reactor Regulation Attention: 3. A. Zwolinski, Chief Operating Reactors Branch No. 5 Division of Licensing U. S. Nuclear Regulatory Commission Washington, D.C.
20555 Gentlemen:
Subject:
Docket No. 50-206 Transamerica Delaval Inc. (TDI) Diesel Engines Revised Maintenance and Surveillance Program San Onofre Nuclear Generating Station Unit 1
Reference:
Letter M. 0. Medford (SCE) to J. A. Zwolinski (NRC), March 8, 1985, Revised Maintenance and Surveillance Program By the referenced letter, Southern California Edison (SCE) submitted a revised maintenance and surveillance program for the San Onofre Nuclear Generating Station, Unit 1 emergency diesel generators. This letter is to identify a further revision to the program, as described below.
Item (1)(A) in Section II to Table A of the referenced letter requires hourly recording of various engine operating parameters as part of the monthly engine surveillance test. Included in the list of parameters to be recorded is the pressure drop across the filter of the fuel oil transfer pump. Even though Technical Specification 4.4.B requires the engines to be run for > 60 minutes during the monthly test, the normal run time is two full hours, which is in compliance with the diesel manufacturer's recommendation.
The requirement then translates into two pressure drop readings taken one hour apart during each run, which is both cumbersome and unnecessary, considering the following:
(A) Operation of the fuel oil transfer pump is intermittent and automatic (controlled by the fuel oil day tank level), as the result of which the pump must ordinarily be started manually to obtain the required reading(s).
6504180277 650416 PDR ADOCK 05000206 PDR
Mr. 3.
April 16, 1985 (B) In the absence of any unusual changes in the other listed parameters, the second pressure drop reading would merely duplicate the data provided by the first reading.
(C) After the first reading is taken, then further assurance as to the operability of the fuel oil transfer pump and filter is provided by an hourly check of the fuel day tank level, as required by the present program.
For the reasons stated above, only one pressure differential reading for the fuel oil transfer pump filter is necessary as part of the monthly diesel engine surveillance test. Accordingly, a revised insert page to Table A of the referenced letter is enclosed.
If you have any questions, please call me.
Very truly yours, Enclosure cc:
USNRC Document Control Desk (Washington, D.C. 20555)
F. R. Huey (USNRC Senior Resident Inspector, Units 1, 2 and 3)
Enclosure Insert Page to Revised M&S Change Date:
4/85 Program dated March 8, 1985
-5 Section II Action Frequency
- 1) (A) Record engine operating parameters:
Once per hour, during surveillance
- a. engine inlet lube oil pressure testing (for items a.
- b. turbo lube oil pressure through p. below).
- c. fuel oil pressure
- d. fuel oil filter and strainers differential pressure
- e. left bank air manifold pressure
- f. right bank air manifold pressure
- g. lube oil filter differential pressure
- h. jacket water pressure (inlet and outlet)
- 1. crankcase vacuum
- j. all cylinder exhaust temperatures
- k. exhaust manifold temperatures at turbine inlet
- 1. lube oil temperature (inlet and outlet)
- m. jacket water temperature (inlet and outlet)
- n. tachometer
- o. hourmeter
- p. generator load
- q. fuel oil transfer pump filter Once per month, during surveillance differential pressure testing.
(B) Check following operating parameters:
Once per hour, during surveillance testing.
- a. starting air pressure
- b. fuel oil day-tank level
- 2) Air roll engine At 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> and at 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> following engine shutdown. Also prior to a planned start, unless the engine has run and/or been air rolled in the 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> immediately preceding the start.
- 3) Visually inspect external engine Monthly or after every 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> of block and base for oil and water engine operation, whichever comes leakage (engine running) first.
- 4)
Perform laboratory analysis of lube Quarterly oil sample taken from the bottom of sump to check for presence of water.
- 5) Visually inspect all connecting rod At refueling or after every boxes and check for bolt preload relaxation 285 hours0.0033 days <br />0.0792 hours <br />4.712302e-4 weeks <br />1.084425e-4 months <br /> of operation, whichever comes first.
- 6)
Check preload relaxation on 25% of cylinder At refueling.
head studs, 25% of rocker arm bolts, and 50%
of air start valve capscrews