ML19211A835: Difference between revisions

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{{#Wiki_filter:Commonwealth Edison b One First National Plaza Chicago, Illinois Address Reply to: Post Office Box 767 Chicago Illinois 60690 December 6, 1979 Mr. James G.
{{#Wiki_filter:Commonwealth Edison One First National Plaza Chicago, Illinois b
Keppler, Director Directorate of Inspection and Enforcem9nt - Region III U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137  
Address Reply to: Post Office Box 767 Chicago Illinois 60690 December 6, 1979 Mr. James G. Keppler, Director Directorate of Inspection and Enforcem9nt - Region III U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois               60137


==Subject:==
==Subject:==
LaSalle County Station Units 1 and 2 Supple.nental Information Regarding IE Bulletin 79-07, " Seismic Stress Analysis of Safety Related Piping" NRC Docket Nos. 50-373 and 50-374 References (a) :
LaSalle County Station Units 1 and 2 Supple.nental Information Regarding IE Bulletin 79-07, " Seismic Stress Analysis of Safety Related Piping" NRC Docket Nos. 50-373 and 50-374 References (a) :           C. Reed letter to J. G. Keppler dated June 1, 1979 (b) :     R. L. Gridley (GE) letter to D. G.
C.Reed letter to J.
Eisenhut (NRR-DOR) dated July 31, 1979 (c) :     R. L. Gridley (GE) letter to D. G.
G.Keppler dated June 1, 1979 (b) : R.L. Gridley (GE) letter to D.
Eisenhut (NRR-DOR) dated September 12, 1979
G.Eisenhut (NRR-DOR) dated July 31, 1979 (c) : R.L. Gridley (GE) letter to D.
G.Eisenhut (NRR-DOR) dated September 12, 1979  


==Dear Mr. Keppler:==
==Dear Mr. Keppler:==


In order to complete the documentation of seismic stress analysis committeo in Reference (a) in response to the direction of IE Bulletin 79-07, this letter is being submitted.
In order to complete the documentation of seismic stress analysis committeo in Reference (a) in response to the direction of IE Bulletin 79-07, this letter is being submitted.
General Electric indicated in Reference (b) that the fine sample problems defined by NRC had been completed to verify the SAP-PIYSIS code and that the results for frequency and modal participation factors are in agreement with the NRC problem definitions.
General Electric indicated in Reference (b) that the fine sample problems defined by NRC had been completed to verify the SAP-PIYSIS code and that the results for frequency and modal participation factors are in agreement with the NRC problem definitions.       General Electric completed the documentation of these results with the submittal of NEDO-24120, "PISYS Analysis of NRC Benchmark Problems" in Reference (c).
General Electric completed the documentation of these results with the submittal of NEDO-24120, "PISYS Analysis of NRC Benchmark Problems" in Reference (c).
This completes the Commonwealth Edison response to the subject Bulletin for LaSalle County Station.                     If there are any further questions in this regard, please direct them to this office.
This completes the Commonwealth Edison response to the subject Bulletin for LaSalle County Station.
Very truly yours,
If there are any further questions in this regard, please direct them to this office.Very truly yours,&%1 t..1635 554 D.L.Peop es Director of Nuclear Licensing LOD:mae 3 cc: Director, Division of Reactor Operations Inspection 01979[\_...7 912210 L 9}}
                                                  &%1       t..
D. L. Peop es 1635 554 Director of Nuclear Licensing LOD:mae 3
cc:   Director, Division of Reactor Operations Inspection                                                   01979
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Revision as of 12:10, 19 October 2019

Responds to IE Bulletin 79-07, Seismic Stress Analysis of Safety-Related Piping. Fine Sample Problems,Defined by NRC, Completed,Verifying SAP-PIYSIS Code.Frequency & Modal Participation Factors Agree W/Nrc Definitions
ML19211A835
Person / Time
Site: LaSalle  Constellation icon.png
Issue date: 12/06/1979
From: Peoples D
COMMONWEALTH EDISON CO.
To: James Keppler
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
IEB-79-07, IEB-79-7, NUDOCS 7912210169
Download: ML19211A835 (1)
v • d • e


Text

Commonwealth Edison One First National Plaza Chicago, Illinois b

Address Reply to: Post Office Box 767 Chicago Illinois 60690 December 6, 1979 Mr. James G. Keppler, Director Directorate of Inspection and Enforcem9nt - Region III U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137

Subject:

LaSalle County Station Units 1 and 2 Supple.nental Information Regarding IE Bulletin 79-07, " Seismic Stress Analysis of Safety Related Piping" NRC Docket Nos. 50-373 and 50-374 References (a) : C. Reed letter to J. G. Keppler dated June 1, 1979 (b) : R. L. Gridley (GE) letter to D. G.

Eisenhut (NRR-DOR) dated July 31, 1979 (c) : R. L. Gridley (GE) letter to D. G.

Eisenhut (NRR-DOR) dated September 12, 1979

Dear Mr. Keppler:

In order to complete the documentation of seismic stress analysis committeo in Reference (a) in response to the direction of IE Bulletin 79-07, this letter is being submitted.

General Electric indicated in Reference (b) that the fine sample problems defined by NRC had been completed to verify the SAP-PIYSIS code and that the results for frequency and modal participation factors are in agreement with the NRC problem definitions. General Electric completed the documentation of these results with the submittal of NEDO-24120, "PISYS Analysis of NRC Benchmark Problems" in Reference (c).

This completes the Commonwealth Edison response to the subject Bulletin for LaSalle County Station. If there are any further questions in this regard, please direct them to this office.

Very truly yours,

&%1 t..

D. L. Peop es 1635 554 Director of Nuclear Licensing LOD:mae 3

cc: Director, Division of Reactor Operations Inspection 01979

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