ML13330B200
| ML13330B200 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 04/28/1987 |
| From: | Medford M Southern California Edison Co |
| To: | NRC Office of Administration & Resources Management (ARM) |
| References | |
| TAC-60369 NUDOCS 8705050307 | |
| Download: ML13330B200 (2) | |
Text
Southern California Edison Company P. 0.
BOX 800 2244 WALNUT GROVE AVENUE ROSEMEAD, CALIFORNIA 91770 M. 0. MEDFORD TELEPHONE MANAGER OF NUCLEAR ENGINEERING (818) 302-1749 AND LICENSING April 28, 1987 U. S. Nuclear Regulatory Commission Attention:
Document Control Desk Washington, D.C. 20555 Gentlemen:
Subject:
Docket No. 50-206 Amendment Application No. 127 to POL No. DPR-13 San Onofre Nuclear Generating Station Unit 1 While reviewing proposed Amendment Application No. 127, dated December 19, 1985, to the San Onofre Unit 1 Provisional Operating License, the NRC staff recently indicated that they need additional information regarding the configuration of the San Diego Gas and Electric Co. (SDG&E) offsite power system at San Onofre. Specifically, this information request has to do with the identity, load capacity and physical independence of the more recently added fourth high voltage line on the SDG&E system. A reference to-this line is found in the Basis section of Amendment Application No. 127.
The requested information is provided below.
Referring to the enclosed one line diagram of the San Onofre Units 1, 2 and 3 switchyards (Figure 8.2-1), Mission TL 23006 is the fourth tie line that was added to the SDG&E offsite power circuits at San Onofre.
This line became operational in September 1983. It has a load capacity of 442 MVA/1109 Amps, which is the same as for the other three SDG&E high voltage lines shown in Figure 8.2-1.
Additionally, the SCE and SDG&E offsite power systems are carried on separate rights of way and the respective switchyards are interconnected by a double breaker arrangement and disconnecting switches located between the two switchyards. Therefore, the physical independence of the two offsite power systems or of the two switchyards from each other is not affected by the Mission TL 23006 tie line.
If you have any further questions, please call me.
7O5 0AS3 0 7 370418 Very truly yours, P
CK 05000206 PDR Enclosure cc:
R. F. Dudley, NRR Project Manager, San Onofre Unit 1
- 3. B. Martin, Regional Administrator, NRC Region V F. R. Huey, NRC Senior Resident Inspector, San Onofre Units 1, 2 and 3 A
EAST BUS WEST BUS FUTURE 19 ENCINA TL23010 4-.
UNIT 3 RES. AUX MISSIN TL200 1
MISSION TL23002 SD
& E FUTURE 13 TALEGA TL23007 -
FUTURE 10 SCE SANRARONO UNTRE U
SANTIAGO NO. 2 NO.0 SATIG NO.
NEW Updated
-- SPACE ASSIGNEO SNOOR
__FOR FUTURE USE NUL A GENRTIGTAIO TL TIE LINE NCERGNRTN TTO Unit 2 & 3 ONE LINE DIAGRAM SWITCHYARDS Figure 8.2-1 2/87 RevisionL 3