ML16341A462
| ML16341A462 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 12/20/1984 |
| From: | Knighton G Office of Nuclear Reactor Regulation |
| To: | Shiffer J PACIFIC GAS & ELECTRIC CO. |
| References | |
| NUDOCS 8501030403 | |
| Download: ML16341A462 (10) | |
Text
Docket Nos:
50-275 and 50-323 HAEC 2O 1S84 Mr. J.
D. Shiffer, Vice President Nuclear Power Generation c/o Nuclear Power Generation, Licensing Pacific Gas and Electric Company 77 Beale Street, Room 1451 San Francisco, California 94106
Dear Mr. Shiffer:
JPKnight RBosnak MHartzman
- DKirsch, RV DISTRIBUTION:.
t~N 50=275/323 NRC PDR Local PDR PRC System LB ¹3 r/f JLee HSchierling RHeischman, ISE
- EJordan, ISE
- Attorney, OELD ACRS (16)
Subject:
Pipe Support Concerns Expressed by Individual Enclosed is a list of concerns that recently were expressed to the staff by a former employee at the Diablo Canyon Project.
At the individual's request the identity is being withheld from public disclosure.
The concerns relate to design and analysis practices for pipe supports at the Diable Canyon Project.
We request that you address to each of the given concern as soon as possible but no later than January 8, 1985.
Sincerely,
Enclosure:
As stated cc:
See next page Ge rg W. Knighton, Chief Licensing Branch No.
4 Division of Licensing DL:LB ¹3 HSchierling/
mc 12/[p/84 8501030403 842220 PDR ADOCK 05000275 PDR DL ighton 12/(rj /84
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Mr. J.
D. Shiffer, Vice President Nuclear Power Generation c/o Nuclear Power Generation, Licensing Pacific Gas and Electric Company 77 Beale Street, Room 1451 San Francisco, California 94106 Philip A. Crane, Jr.,
Esq.
Pacific Gas 5 Electric Company Post Office Box 7442 San Francisco, California 94120 Mr. Malcolm H. Furbush Vice President - General Counsel Pacific Gas 5 Electric Company Post Office Box 7442 San Francisco, California 94120 Janice E. Kerr, Esq.
California Public Utilities Commission 350 McAllister Street San Francisco, California 94102 Mr. Frederick Eissler, President Scenic Shoreline Preservation Conference, Inc.
4623 More Mesa Drive Santa Barbara, California 93105 Ms. Elizabeth Apfelberg 1415 Cozadero San Luis Obispo, California 93401 Mr. Gordon A. Silver Ms. Sandra A. Silver 1760 Alisal Street San Luis Obispo, California 93401 Harry M. Willis, Esq.
Seymour 5 Willis 601 California Street, Suite 2100 San Francisco, California 94108 Mr. Richard Hubbard MHB Technical Associates Suite K
1725 Hamilton Avenue San Jose, California 95125 Mr. John Marrs, Managing Editor San Luis Obis o Count Tele ram Tribune o nson venue P. 0.
Box 112 San Luis Obispo, California 93406 Diablo Canyon Resident Inspector/Diablo Canyon NPS c/o US Nuclear Regulatory Commission P. 0.
Box 369 Avila Beach, California 93424 Ms.
Raye Fleming 1920 Mattie Road Shell Beach, California 93440 Joel
- Reynolds, Esq.
John R. Phillips, Esq.
Center for Law in the Public Interest 10951 West Pico Boulevard Third Floor Los Angeles, California 90064 Mr. Dick Blankenburg Editor 5 Co-Publisher South County Publishing Company P. 0.
Box 460 Arroyo Grande, California 93420 Bruce Norton, Esq.
Norton, Burke, Berry 5 French, P.C.'02 E. Osborn Road P. 0.
Box 10569 Phoenix, Arizona 85064 Mr.
W. C. Gangloff Westinghouse Electric Corporation P.
O.
Box 355 Pittsburgh, Pennsylvania 15230 i
David F. Fleischaker, Esq.
P. 0.
Box 1178 Oklahoma City, Oklahoma 73101
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Arthur C. Gehr, Esq.
Snell 5 Wilmer 3100 Valley Center Phoenix, Arizona 85073 Mr. Lee M. Gustafson, Director Federal Agency Relations Pacific Gas 5 Electric Company 1050 17th Street, N.W.
Suite 1180 Washington, DC 20036 Regional Administrator - Region V
US Nuclear Regulatory Commission 1450 Maria Lane Suite 210 Walnut Creek, California 94596 Michael J. Strumwasser, Esq.
Special Counsel to the Attorney General State of California 3580 Wilshire Boulevard, Suite 800 Los Angeles, California 90010 Mr. Tom Harris Sacremanto Bee 21st and 0 Streets Sacramento, California 95814 Mr. H. Daniel Nix California Energy Commission 1516 9th Street, MS 18 Sacramento, California 95814 Lewis Shollenberger, Esq.
US Nuclear Regulatory Commission Region V
1450 Maria Lane Suite 210 Walnut Creek, California 94596 Mr. Thomas 'Devine Government Accountability Pro,iect
'nstitute for Policy Studies 1901 gue Street, NW Washington, DC 20009
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ENCLOSURE DIABLO CANYON PROJECT PIPE SUPP RT C
NCERNS 1.
The most limiting combination of various piping loads were not always used as input for gang support calculations.
2.
Unusual structural components or details, such as intermediate plates, were not always analyzed because they appeared too complex.
3.
The weld stresses were not always analyzed for all weld configurations of a pipe support and were not always properly modeled.
4.
Flare bevel welds were not analyzed for shear in the base metal.
5.
The design of pipe supports using wide flange beams or channels did not always include the effect of torsion.
6.
Civil structures to which pipe supports are attached may not be properly analyzed for torsional loads.
7.
The allowable stress values selected for lugs attached to pipes may not be based on the maximum operating termperature of the pipe.
Stresses in the lug welds may be underestimated due to improper weld geometry.
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December 4, 1984 PGandE Letter No.:
DCL-84 370 fear. John B. Nartin, Regional Administrator U. S. Nuclear Regu'latory Commission, Region Y
1450 Maria Lane, Suite 210 Malnut Creek CA 94596-5368 I
Re:
Docket No. 50-275, OL-DPR-80 Docket Mo. 50-323 Diablo Canyon Units 1 and 2
Hiss)ng Pages from Emergency Plan Implementing Procedure
Dear Nr. tlartin:
bn November 76~
lWOI PQQndE'IuLm1tvo.~
>>p~l~>.Hs to Seven implementing Procedures for the Diablo Canyon, Power Plaqt Un)ts 1
and 2 Emergency P"lan.
EP G-2S1 was one of the Im'plementing Procedures w'high ptas updated.
Pages 1 and 2
of 31'of the attachment "EmergenCy Organization Call Ust" were inadvertently omitted when the update to EP 6-2S) was suhmitted to the NRC.
Enclosed are the previously omitted pages.
K)ndly acknowledge receipt of this material on the enclosed copy of this letter and return it in the enclosed addreSSed envelope.
Sincere'ly, OM6IQL QONEO ay J.
D. Shiffer Enclosure cc:
,Document Control Desk (2)
R. Ash Service List bcc: Diablo Distribution 00278/0024K H~ 6 C
ERK ACTS N345
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