ML19270G052

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Responds to IE Bulletin 79-07.Forwards Computer Codes & Analytical Methods Used to Predict Stresses in safety- Related Piping
ML19270G052
Person / Time
Site: Davis Besse Cleveland Electric icon.png
Issue date: 04/24/1979
From: Jeffery Grant
TOLEDO EDISON CO.
To: James Keppler
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
NUDOCS 7906010308
Download: ML19270G052 (3)


Text

bb UU April 24, 1979 gg Docket No. 50-346 JAMES S. GRANT License No. NPF-3 M*,[,"s'f,'

m m 19 t r v Serial No. 1-62 Mr. James G. Keppler Regional Director, Region III Office of Inspection and Enforcement U. S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137

Dear Mr. Keppler:

IE-Bulletin No. 79-07 requested that we review for Davis-Besse Nuclear Power Station Unit 1 the analytical methods used for combining the horizontal and vertical seismic loadings used to predict stresses in safety-related piping and pipe supports and restraints. Enclosed is our response to this matter.

Very truly yours, MN C'

cc:

U. S. Nuclear Regulatory Commission Office of Inspection and Enforcement Division of Reactor Operations Inspection Washington, D. C. 20555 Enclosure bt b/1-2 2237 193

'R 2 61979 THE TOLEDO EDISON COMPANY EDISON PLAZA 300 MADISON AVENUE TOLEDO. OHIO 43652 70060 0309

April 24, 1979 Davis-Besse Unit 1 Docket No. 50-346 License No. NPF-3 Serial No. 1-62 Enclosure Toledo Edison's responses to IE-Bulletin No. 79-07 Items 1 through 4 are as follows:

1. The spectral methods mentioned in IE Bulletin No. 79-07 were not used.
2. Not applicable. None of the methods identified in Item 1 were used.
3. The computer programs used for the stress analysis of safety-related piping have been verified as follows:

ME 632 verified using PISOL, PIPESD and TPIPE ME 101 verified using ME 632, TPIPE and SUPERPIPE ADLPIPE verified using TMRSAP ST3DS verified using sample problems contained in the users manual LUMS verified using sample problems contained in the users manual Programs used in the verification of the above computer programs have themselves been verified as follows:

PISOL verified using NUPIPE, PIPESD, ADLPIPE and ME 101 SAPIPE verified using PISOL TPIPE verified using PISOL and ME 632 Computer codes listed above are identified as follows:

ME 632 " Seismic Analysis of Piping Systems", Bechtel Power Corporation ME 101 " Linear Elastic Analysis of Pipe" (LEAP), Bechtel Power Corporation ADLPIPE Teledyne Engineering Service, Boston, Massachusetts ST3DS " Users Manual, ST3DS Piping Flexibility Analysis Program as Modified for B&W Application", Babcock 6 Wilcox LUMS " Users Manual, Piping Flexibility Analysis Program LUMS as Modified for B&W Application", Babcock &

Wilcox 2237 194

PISOL EDS Nuclear Inc., San Francisco, Calif.

SAPIPE PMB Systems Engineering Inc., San Francisco, Calif.

TPIPE PMB Systems Engineering Inc., San Francisco, Calif.

SUPERPIPE EDS Nuclear Inc., San Francisco, Calif.

NUPIPE Nuclear Service Corporation, Campbell, Calif.

PIPESD John A. Blume & Associates Engineers, San Francisco, Calif.

TMRSAP Teledyne Engineering Service, Boston, Massachusetts

4. Not applicable. None of the methods identified in Item 1 were used.

2237 195