ML13317B066
| ML13317B066 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 03/30/1982 |
| From: | Baskin K Southern California Edison Co |
| To: | Crutchfield D Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8204070432 | |
| Download: ML13317B066 (4) | |
Text
Southern California Edison Company P. 0. BOX 800 2244 WALNUT GROVE AVENUE ROSEMEAD. CALIFORNIA 91770 K. P. BASKIN TELEPHONE MANAGER OF NUCLEAR ENGINEERING, March 30, 1982 (213) 572-1401 SAFETY, AND LICENSING Director, Office of Nuclear Reactor Regulation Attention: D. M. Crutchfield, Chief Operating Reactors Branch No. 5 Division of Licensing U. S. Nuclear Regulatory Commission Washington, D.C.
20555 4
Gentlemen:
Subject:
Docket 50-206 Safety Injection System Modifications San Onofre Nuclear Generating Station Unit 1 Our letter dated December 8, 1981 indicated that we have received proposals for SIS replacement valves and that we were in the process of reviewing the proposals. The purpose of this letter is to advise you that we have completed our bid evaluations, and as discussed in our December 8, 1981 letter, we have prepared a more definite schedule (see attachment A) for delivery and installation. This is based on receiving eight SIS valves and actuators from the Borg-Warner Corporation. The valves will be shipped to our site thirty-two and one half months after receipt of purchase order which will be issued imminently.
Qualification testing to current standards is assumed in preparation of this schedule.
The enclosed schedule reflects the following milestones:
- a. Engineering for valve replacement - completed December 1982
- b.
Vendor engineering - completed August 1982
- c. Material procurement and fabrication - completed August 1983
- d.
Valve testing and inspection - completed October 1984
- e.
Valve delivery - December 1984
- f.
Construction and startup testing - completed during next refueling Ao1 outage after (e) above (anticipated first half 1985).
In addition, as discussed in our December 8, 1981 letter, we have completed a conceptual study of the SIS to determine if a redesign is warranted. Based on the alternatives presented in our December 8, 1981 letter, alternative 4, Dedicated SI Pumps (schematic enclosed as Attachment B for information) has been selected for additional study to determine if a redesian is warrantirL.uao are, therefore, continuing with preliminary 8204070432 820330 PDR ADOCK 05000206 P
Mr. D.
March 30, 1982 engineering of accessibility, pipe routing, power requirements, etc., of this system. If we determine that a redesign is warranted, the necessity to replace the SIS valves will be considered as a part of the redesign effort.
We expect to complete the preliminary engineering phase of our study in July, 1982 and will notify you of our determination at that time.
If you have any questions or desire further information concerning the schedule discussed above, please contact me.
Very truly yours, Enclosures cc:
R. H. Engelken, Director, OIE, Region V
OVERALL SCHEDULE 18 VALVE REPLACEMENT ATTACHMENI A ENGINEERING (SCE & BPC)
PROCUREMENT VENDOR ENGINEERING MATERIAL PROCUREMENT
& FABRICATION TESTING IEEE 382 m
ASSEMBLY CYCLE OPERABILITY SIMULATION TESTING INSPECTION m
PREPARATION FOR S H IP M E N T VE CONSTRUCTION VL VE 12/84 START-UP 1982 1983 1984 1985
ITACHMENT B PRMo. CC'NO. PUMPS 70 STEAMf OENEAWRCS
/VFW XECDCOlNAINMEfiT 55*4w A___
a2A RefrpEo P/PING sis 1.0.
Ic.
o~e CONrION I
S/S51A-SIS PUPS(&ex/sr P&EDWATMq PUMP G -3A)1 LOop C SI
~ss C04D LEG
,CRM.
CONO. PUMPf~S TO STM. GENERAgR 85488 5/S r S/S COLD LEG S/S IA I
ICOW z~a
-A2DCAED SJPUMPa I
ALTEPMVAP/VS 4___