ML20069A210
| ML20069A210 | |
| Person / Time | |
|---|---|
| Site: | 05000000, Palisades |
| Issue date: | 05/18/1979 |
| From: | Silver R Office of Nuclear Reactor Regulation |
| To: | Eisenhut D Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20069A188 | List: |
| References | |
| FOIA-82-399, TASK-03-06, TASK-3-6, TASK-RR NUDOCS 7907300565 | |
| Download: ML20069A210 (14) | |
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Docket No. 50-255 GAY 181973 MEMORANDUM FOR: Darrell G. Eisenhut, Deputy Director Division of Operatinc Reactors, MRR 1
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Dennis L. Zionann, Chief,, Operating Reactors Branch #2, 00P j
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Richard 5. Silver Project Manager. Operating Reactors Branch #2. 00R j
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SU4 JECT:
PALISADES P!PE SUPPORT MODIFICATIONS
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~ On April 10. 1979 RNion~III. !&E and Consmers Pour Company (CPC) informed i
k me of potential seismic design analysis. problems involving pipe supports at the 4
Palisades Plant. Fe this notification, the NRC staff had a series of l
. telephone conversattens meeting with the CPC staff and received doceen-l l c
- . g tation of~eur concerns'
'ciWisettwe actions to be taken by letters frem CPC i dated Aprf).19.1579. Ap...il 23 9979, and May 16,1979. See enclosed chronology.
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e%Thelanismicdesige' analysis:~'
9 ~~.resulted fHue en error in an Energy Data 44' ystems, lac.JERS),
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.ms used in the EDE analysis of certain i
'..Q' d piping 'sy'stes.at ': flanibility.for.elbousQStateen ql
.bT,pe, error insolved the calestation of M
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- syst'ans were affected of which six 7
"E. regsfred mo'dtfication to seet'Mit [
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og. cede's 31.1 (1973). On May 1.1979,
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CPC issued a press release 'and'ia us that the Palisades Plant which had l
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1been shutdoun for turM ne related pfehless, would riesin shutdoun pendine
- resolution of the potential' seismic design problems. In a telephone call from
. Mr. C. Bilby. Vice President of CpC. to 0 tisenhut. CPC confirmed that the i
7 plant.would remain stutdem'until all modifications needed to make the piping I
systems conform to ANSI:B 31.1 (1973) were completade In addition. Mr. Bilby I
confirmed that CPC mould make any additional modifications during the upcoming 1979 refueling outate needed to bring the systems in total conformance with the F5AR analysis criteria. These comitments were confirmed in a letter from CPC dated Mn.16.1979.
?
-w The staff of the Engineering Branch. 00R, has reviewed the material provided by
. CPC and agrees that there is reasonable assurance that (1) the piping systems, as modified, conform to ANSI B 31.1 (1973) and (2) the piping systems,. as
'. modified, would not fail during the operating basis earthquake or safetshutdem serthquake described in the FSAR.
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Jarrell G. Eisenhut,
It should be noted that by telegram dated May 1.1979. copy enclosed r.P::
confirmed that none of the methods specified in IE Bulletin 79-07 were usat in cornputer codes for the seismic analysis of safety-related pipino at Palisades.
Based on our review, we conclude that CPC has taken appropriate corrective action.
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- kN Richard D. Silver. Project Manager Operating Reacters Branch #2 Division of Operating Reactors
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Enclosures:
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Chronology of Events d
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Telegram dtd. 5/1/79 d
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cc w/ enclosures:-
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J. Fair DISTRIBUTION N
W Eet 3 ORB #2 Reading
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seismic design analysis prcble s.
4/11/79 Conference call among CPC representa::ves, E3 sta'f anc R. Silver,.
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4/19/79 Letter from CPC documenting the infor e 'on oro.nce: to the NRC staff in the 4/11/79 c,nference sall.
j 4/23/79 CPC issued an LER concerning tre cice sappo-ts.
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4/27/79 Meeting between EDS and IE in Setnesda to ciscuss E05
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calculational er. ors.
(S raari:ed in r:emo 'ror, E. L. Jordan 4
dated 5/9/79).
c 5/1/79 CPC infomed us that Palisades would remai.n shutdown pending resolution of potential seismic design analysis problems.
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l 5/7/79 Meeting with CPC to discuss seismic design anai sis concerns f
and CPC plans for perfonning reanalyses and modificaticns.
fi:i TM 5/11/79 Mr. Bilby, Vice President of CPC, informed D. Eisenhut that jdf Palisades would remain shutdown until all modifications jb'fp identified in the 4/19/79 letter ard 5/7/79 meeting were
,y comp 1eted.
y.i u.4 5/14/79 &
IE Inspector, Isa Yin, perfomed inspections of modifications 5/15/79 in progress.
,d.g 5/16/19 As a result of a question raised by Mr. Yin, John Fair, EB, i
R. Silver, ORB #2, and Mr. Yin met with CE, and CPC representatives 1
i at Combustion Engineering in Windsor, Connecticut.
- r. Vin's i
w questions were satisfactorily answerad.
5/17/79 CPC transmitted a letter dated 5/16/79 confirming that all modifications identified in their 4/19/79 letter arc 5/7/79 meetir; tculd be completed by "ay 17,1979. : rier :: startue.
C~C also infomed us that tne.mcdificatice; nave been reviewe; by their Plant Review Comittee and Sa'e. t 4.C
- eview Board and deter--ined ne: to irvetse 3 v ~. e.e: :ve,
l Question.
- PC also deter-ned : a: 3 -
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Tne letter al.a :cr-m v. uc ::c.a.
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i THIS CONFIRMS THE TELEPHONE CONVERSATION BETWEEN hod 4RD J 'a'ONG I'
(MMC ) AND CONSUMERS POWER CO ON 5-1-79 CONCERNING IC 3ULLETIN
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4W4LYS 15 Or $4FETY-9ELATra Pl* LNG AT OUR PALIS4 DES 99 9IG RSC-POINT 1
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MITTED 04 03 9FFORE S-4-79.
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