ML13324A687
| ML13324A687 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 07/25/1985 |
| From: | Crutchfield D Office of Nuclear Reactor Regulation |
| To: | Baskin K Southern California Edison Co |
| References | |
| LSO5-85-07-031, LSO5-85-7-31, NUDOCS 8508020139 | |
| Download: ML13324A687 (4) | |
Text
July 25, 1985 Docket No.:
50-206 DISTRIBUTION LS05-85-07-031 Central Files NRC PDR ACRS (10)
Mr. Kenneth P. Baskin, Vice President L PDR Service List Nuclear Engineering ORB #5 Reading DCrutchfield Safety and Licensing Department HThompson JZwolinski Southern California Edison Company OELD CGrimes 2244 Walnut Grove Avenue EJordan EMcKenna Post Office Box 800 BGrimes TCheng Rosemead, California 91770 JPartlow RDudley
Dear Mr. Baskin:
CJamerson
SUBJECT:
Reactor Building Response Spectra - San Onofre Unit 1 On July 1-2, 1985, the staff met with representatives of Southern California Edison Company (SCE) and consultants to review calculations of floor response spectra for the containment/reactor building. A meeting summary is being prepared separately.
For the north-south direction, your results indicated that the highest response (zero period acceleration) occurred at foundation level with lower values at higher elevations in the structure. Since this trend was contrary to our expectations, the analysis was then examined in greater detail.
One possible explanation for this trend may be the effect of neglecting some mass at high frequencies.
You have proposed to use the envelope of the response spectra calculated at the different elevations for piping and equipment analyses throughout the building. We will perform confirmatory time-history analyses to generate floor response spectra for the reactor building. Should our analyses predict significantly higher responses than your envelope at the upper elevations, it will be necessary for you to regenerate response spectra at these locations and to revise your analyses.
This approach was discussed and agreed to at the July 1-2, 1985 meeting.
Our analysis results are expected to be available by August 16, 1985.
If you have any questions please contact Mr. C. Grimes (301-492-8414).
Original signed by:
Dennis M. Crutchfield Dennis M. Crutchfield, Assistant Director for Safety Assessment Division of Licensing Office of Nuclear Reactor Regulation cc:
See Next Page
- SEE PREVIOUS SHEET FOR CONCURRENCE.
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AD TCheng:lt EMcKenna CGrimes RDudley JZwolinski DCj chfield 07/18/85 07/18/85 07/19/85 07/19/85 07/23/85 7
85 8508020139 850725 PDR ADOCK 05000206 P
Docket No.:
50-206 DISTRIBUTION LS05-85 Central Fes NRC PDR ACRS (10)
Mr. Kenneth P. Baskin, Vice President L PDR Service List Nuclear Engineering ORB #5 Reading DCrutchfield Safety and Licensing Department HThompson JZwolinski Southern California Edison Company OELD CGrimes 2244 Walnut Grove Avenue EJordan EMcKenna Post Office Box 800 BGrimes TCheng Rosemead, California 91770 JPartlow RDudley
Dear Mr. Baskin:
CJamerson
SUBJECT:
Reactor Building Response Spectra - San Onofre Unit 1 On July 1-2, 1985, the staff met with representatives of Southern California Edison Company (SCE) and consultants to review calculations of floor response spectra for the containment/reactor building. A meeting summary is being prepared separately.
For the north-south direction, your results indicated that the highest response (zero period acceleration) occurred at foundation level with lower values at higher elevations in the structure. Since this trend was contrary to our expectations, the analysis was then examined in greater detail.
One possible explanation for this trend may be the effect of neglecting some mass at high frequencies.
You have proposed to use the envelope of the response spectra calculated at the different elevations for piping and equipment analyses throughout the building. We will perform confirmatory time-history analyses to generate floor response spectra for the reactor building. Should our analyses predict significantly higher responses than your envelope at the upper elevations, it will be necessary for you to regenerate response spectra at these locations and to revise your analyses.
This approach was discussed and agreed to at the July 1-2, 1985 meeting.
Our analysis results are expected to be available by July 31, 1985 provided that complete modeling information is received from you by July 17, 1985.
If you have any questions please contact Mr. C. Grimes (301-492-8414).
Dennis M. Crutchfield, Assistant Director for Safety Assessment Division of Licensing Office of Nuclear Reactor Regulation cc:
See Next Page
- SEE PREVIOUS SHEET FOR CONCURRENCE SEPB:DL*
SEPB:DL*
SEPB:DL 0 B5DL ORB#5:DaC AD/SA:DL TCheng:lt EMcKenna CGrimes RDudley JZwolinski DCrutchfield 07/18/85 07/18/85 07/l0/85 07/11/85 07/i.'/85 07/ /85
Docket No.:
50-206 DISTRIBUTION LS05-85 Central Files NRC PDR ACRS (10)
Mr. Kenneth P. Baskin, Vice President L PDR Service List Nuclear Engineering ORB #5 Reading DCrutchfield Safety and Licensing Department HThompson JZwolinski Southern California Edison Company OELD CGrimes 2244 Walnut Grove Avenue EJordan EMcKenna Post Office Box 800 BGrimes TCheng Rosemead, California 91770 JPartlow RDudley
Dear Mr. Baskin:
CJamerson
SUBJECT:
Reactor Building Response Spectra - San Onofre Unit 1 On July 1-2, 1985 we met with representatives of Southern California Edison Company (SCE) and consultants to review calculations of floor response spectra for the containment/reactor building. A meeting summary is being prepared to describe the results of the staff's review.
For the north-south direction, your results indicated that the highest response (zero period acceleration) occurred at foundation level with lower values at higher elevations in the structure. As this trend was contrary to our expectations, the analysis was then examined in greater detail.
One possible explanation for this trend may be the effect of high frequency missing mass.
You have proposed to use the envelope of the response spectra calculated at the different elevations for piping and equipment analyses throughout the building. We will perform confirmatory time-history analyses to generate floor response spectra for the reactor building. Should our analyses predict significantly higher responses than your envelope at upper elevations, it will be necessary for you to regenerate response spectra at these locations and to revise your analyses.
This approach was discussed and agreed to at the July 1-2, 1985 meeting.
Our analysis results are expected to be available by July 31, 1985 provided that complete modeling information is received from you by July 17, 1985.
If you have any questions please contact Mr. C. Grimes.
Dennis M. Crutchfield, Assistant Director for Safety Assessment Division of Licensing Office of Nuclear Reactor Regulation cc:
See Next Page SEPB:'5,fb SEPB:DL ORB#5:DL ORB#5:DL AD/SA:DL TCheng:lt ECGrimes RDudley JZwolinski DCrutchfield 07//e/85 07/1//85 07/ /85 07/
/85 07/ /85 07/ /85
9 Mr. Kenneth P. Baskin San Onofre Nuclear Generating Station Southern California Edison Company Unit No. 1 cc Charles R. Kocher, Assistant Joseph 0. Ward, Chief General Counsel Radiological Health Branch James Beoletto, Esquire State Department of Health Southern California Edison Company Services Post Office Box 800 714 P Street, Office Bldg. 8 Rosemead, California 91770 Sacramento, California 95814 David R. Pigott Mr. Hans Kaspar, Executive Director Orrick, Herrington & Sutcliffe Marine Review Committee, Inc.
600 Montgomery Street 531 Encinitas Boulevard, Suite 105 San Francisco, California 94111 Encinitas, California 92024 Dr. Lou Bernath San Diego Gas & Electric Company P. 0. Box 1831 San Diego, California 92112 Resident Inspector/San Onofre NPS c/o U.S. NRC P. 0. Box 4329 San Clemente, California 92672 Mayor City of San Clemente San Clemente, California 92672 Chairman Board of Supervisors County of San Diego San Diego, California 92101 Director Energy Facilities Siting Division Energy Resources Conservation &
Development Commission 1516 -
9th Street Sacramento, California 95814 Regional Administrator, Region V U.S. Nuclear Regulatory Commission 1450 Maria Lane Walnut Creek, California 94596