ML13308B755
| ML13308B755 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 08/14/1980 |
| From: | Baskin K Southern California Edison Co |
| To: | Schwencer A Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML13308B756 | List: |
| References | |
| TASK-03-06, TASK-3-6, TASK-RR NUDOCS 8008210349 | |
| Download: ML13308B755 (3) | |
Text
REGULATO*INFORMATION DISTRIBUTION A0TEM (RIDS)
ACCESSION NBR:8008210349 DOC.DATE: 80/08/14 NOTARIZED: NO DOCKET FACIL:50-206 San Onofre Nuclear Station, Unit 1, Southern Calibm 05000206 50-361 San Onofre Nuclear Station, Unit 2, Southern Californ 050 J0361 50-362 San Onofre Nuclear Station, Unit 3, Southern Calibm 000362 AUTH.NAME AUTHOR AFFILIATION BASKINK.P.
Southern California Edison Co.
RECIPNAME RECIPIENT AFFILIATION SCHWENCER,A.
Licensing Branch 3
SUBJECT:
Forwards roots "Simulation of Earthquake Ground Motions for San Onofre Nuclear Generating Station Unit 1," final rept &
Supols 1,2 & 3 per NRC requests & 800724 discussion re program results.
DISTRIBUTION CODE: BOIS COPIES RECEIVED:LTR I ENCL.7 SIZE:.
TITLE: PSAR/FSAR AMDTS and Related Correspondence NOTES:1 cooy:SEP Sect. Ldr.
05000206 Send all FSAR & ER amends to L Chandler.
05000361 05000362 RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL ACTION:
LAINASG.
1 0
A/D LICENSNG 1
0 CRUTCHFIELD 1
0 SCHWENCERA, 1
0 SMITHH.
1 0
LEEJ.
1 0
WAMBACHT.
05 1
1 ROOD,M.
05 1
1 INTERNAL: ACCID EVAL BR 1
1 AUX SYS BR 18 1
1 CHEM ENG BR 1
1 CONT SYS BR 1
1 CORE PERF BR 17 1
1 DIRSFTY TECH 1
1 EFF TR SYS BR 1
1 EMERG PREP 22 1
0 EQUIP QUAL BR 1
1 GEOSCIENCES 1
1 HYD/GED BR 11 1
1 I&C SYS BR 20 1
1 I&E 06 3
3 MATL ENG BR 1
1 MECH ENG BR 1
1 MPA 1
0 NRC POR 02 1
1 OELD 1
0 POWER SYS BR 1
1 PROC/TST REV BR 1
1 GA BR 10 1
1 RAD ASSESS BR12 1
1 REAC SYS BR 1
1 I
01 1
1 SIT ANAL BR 27 1
1 ENG BR 1
1 EXTERNAL: ACRS 16 16 LPOR 03 1
1 NSIC 04 1
1 AUG 22 1980 A
TOTAL NUMBER OF COPIES REQUIRED: LTTR
,~'ENCL
Southern California Edison Company P 0. BOX 800 2244 WALNUT GROVE AVENUE ROSEMEAD. CALIFORNIA 91770 K. P. BASKIN MANAGER. NUCLEAR ENGINEERING August 14, 1980 AND LICENSING Director, Office of Nuclear Reactor Regulation Attention:
Mr. Albert Schwencer, Acting Branch Chief Licensing Projects Branch 3 U. S. Nuclear Regulatory Commission Washington, D. C.
20555 Gentlemen:
Subject:
Docket No's. 50-361 and 50-362 San Onofre Nuclear Generating Station Units 2 and 3 In 1975, the applicants initiated a comprehensive program to simulate site specific ground motions at the San Onofre site which would be used in the seismic re-evaluation of San Onofre Unit
- 1. The modeling procedures used in this program have been evaluated against recorded data from several historical earthquakes. The results of this program have been documented in several reports previously submitted on the San Onofre Unit 1 docket.
Because of the value of this program to San Onofre Unit 1, the NRC staff has recently requested that this information be sub mitted on the San Onofre Units 2 and 3 dockets. Consistent with the NRC request, a meeting, encompassing all three dockets, was held on July 24, 1980, to discuss the most recent results of this program.
In order to completely incorporate the results of this program on the San Onofre Units 2 and 3 dockets, seven (7) copies of the following reports, prepared for the applicants by Del Mar Technical Associates, are enclosed (NRC mail code B024):
- 1. Simulation of Earthquake Ground Motions for San Onofre Nuclear Generating Station Unit 1, Final Report, dated May 1978.
- 2. Simulation of Earthquake Ground Motions for San Onofre Nuclear Generating Station, Unit 1, Supplement I, dated July 1979.
5808S21O3I Pi j1
-2
- 3. Simulation of Earthquake Ground Motions for San Onofre Nuclear Generating Station, Unit 1, Supplement II, dated August 1980.
- 4. Simulation of Earthquake Ground Motions for San Onofre Nuclear Generating Station, Unit 1, Supplement III, dated August 1980.
It should be noted that the results of the program docu mented in the enclosed reports have not been relied upon to establish the conservatism of the San Onofre Units 2 and 3 DBE; however, those results do, in fact, support that conservatism. This fact is demonstrated by comparison of the site specific predictions of ground motion from the most recent reports (i.e. Supplement III) with the San Onofre Units 2 and 3 DBE. This comparison for damping values of 2, 5, 7 and 10 percent is represented on Figures 1 thru 12 (seven copies enclosed, NRC mail code B024), and shows that the San Onofre Units 2 and 3 DBE conservately envelopes the site specific predictions at all frequencies.
Because the results of the program documented in the enclosed reports have not been relied upon to establish the conserva tism of the San Onofre Units 2 and 3 DBE even though they support that conservatism, I expect that submittal of these reports and subsequent NRC staff review will not affect completion of the staff's Safety Evaluation Report for San Onofre Units 2 and 3.
If you have any questions or comments concerning this matter, please contact me.
Very truly yours, cc:
USGS, Menlo Park, CA (Dr. J. Andrews)
USGS, Reston, VA (J. F. Devine)
California Division of Mines and Geology (P. Amimoto)
D. B. Slemmons