ML20099D414

Forwards Sargent & Lundy Response to Observation Rept 13, Rev 0,re Hot Gap Checks for Pipe Rupture Restraints

ML20099D414
Person / Time
Site:	Clinton
Issue date:	11/14/1984
From:	Victor H ILLINOIS POWER CO.
To:	Parkinson G BECHTEL GROUP, INC.
References
F-0995, F-995, NUDOCS 8411200369
Download: ML20099D414 (11)

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F 0995 L40-84(ll-14)-L 8G.150b ILLINOIS POWER COMPANY cusics ecun siuien. P.o. ecx e7s, cunrom. ituNcis sim November 14, 1984 50- @ I Mr. Gordon L. Parkinson Bechtel Power Corporation Fifty Beale Street San Francisco, CA 94119

Dear Mr. Parkinson:

Enclosed is S&L's response to Observation Report Number 13, Rev. O.

This response has been reviewed by Illinois Power.

Sincerely yours,

/ .

s p y'({ / ,# J H. R. Victor Manager, Nuclear Station Engineering DW/lm s

cet See Attached Distribution List I

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Project No.14536-51'n ,

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tIllin'oisiPower Company ,

k."Clinton-Power" Station,- Unit;l;.

Indel endent;.. b Design > Review - ,

L' Observation and Resolution' Reports '

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~Mr.'-JJ D.EGeieri "

' As'sistant :to Vice' President-iIllinoisiPower Company 1500'.Southl27th Street Decatur, Illinois--62525 ,

Dear Mr.JGeier:

Enclosed-is a copy'of the below:listcd Resolution Reports.with the~

~

proposed resolution ((Items . 5 ' and 6)-- completed by 'Sargentn & Lundy:

Resolution Report-Nuuiber 13,1 Revision 0 We for completeness.

are also enclosing a copy of the corresponding. Observation Reports Please . review our: proposed resolution and, if you concur, sign . Item 7 of .the Resolution Report and. forward the report to ~ the ' independent reviewer. -Also, please: return a copy of the signed Resolutdon Report to Sargent-&~Lundy for our records.

n Yours very truly, a

..,- w . .n R..C. lieider E-

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Project Manager Attachment - all recipients D. P. Itall: E. B. Branch

11. ~ R; Victor B. A'. Erler F. : A ~ Spangenberg (originals)

W. G. Schwartz

. L' E. Achmann/W. A. Chittenden

1. R. Stensland W.r.G. -liegener . H. S. Taylor h E.TV.' Abraham R. A. . Witt

.R. X.~ French' R. B. Johnson

J;;M.'.McLaughlin M.-J. Shewski

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CLINTON POWER STATION:

Job 15478-003 y' ~ -

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OBSERVATION REPORT?

. File ^ No; . :13

< 1' File RevisionlNo I O

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a Y : Date' octooer it,- 19u4 s-

1. Level.1: classification of Observation: ~ ,

Not'significant to . safety - .

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Y Additional information required *See 5, Committee.'" Recommendation for resolu Significant- to'-safety, . send to. Level 2

$ -. 2. : : Structure (sb . system (s), or component (s)L involved:-

J Pipeirupture restraints for HELB_and MELB.:

~

3. .LDescription of Observation:

~

Pipe rupture restraint _s are designed based.on c'alculations of. cold and hot gaps as predicted by computer analysis. EVerification-is:needed that the measured hot gaps utch the theoretical- gaps, considering changes in.:

support locations, variation in -temperatures,' and . uncertainties built'. in the mathematical model. -

J

.4. : Significance ofl Observation:

(

The potential exists that the design 'of!the pipe rupture restraints might not be adequate without provisions for monitoring and adjusting the gaps -

in-the hot pipe position.

5. . Rocomendation for' resolution (optional):

' S8L should verify design adequacy of the pipe rupture restraints for hot-3 gaps, and provide an assessment of 'its safety significance.-

4 i 6. Signatures:-

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-CLINTON POWER STATION Job'15478-003 A ' ' f; RESOLUTION REPORT l

- Fil e No. - 13

. File. Revision No.- 0 ~l Date October 16,1W l

1. Resolution by Level: 1 Internal' Review Committee 1

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2. - Classification of- Observation: 1

.a. NotLyalid -(see continu tion sheet)

b.

• Not significant to_ se,fety .

c. X . AdditionalJinformation required- -

d. Significant to safety

3. . Program resolution _is:

a. Closed item

b. X Action to be taken by Reviewee

4. Review s res: .

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. '5. Reviewee proposed. resolution:-

a.' Description of proposed resolution:.

(See Continuation Sheet)

b. Basis.of proposed resolution:

(See Continuation Sheet) -

6. Revieweeresponsehort'/signdby -

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/En ineer Date-

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7. Illinois Power Co. Review : '

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15a.~ { Based on experience .'withlother: in-h"ouseEprojects,iSargent L&f Ldndy

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4(S&L)Jhas'- recognizeds thatt the; Nuclear Regulatory Commission]has ~ '[.

re_ quired. hot .

t gap? checks?for pipe rupturecrestraints.1.Although; 4

there;is:no(.

for :such a specific program,'the Fin'al.~ Clinton Safety.! Analysis:

project Report '.provisionsJto

-haafhad' commitment l ' '

.  ; perform /a.hotigap? check.M S&W haslinformallyfdiscussedTa hot.- *

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.  ! gap ? check program Lwith? Illinois : Power Company (:(IPC) andithe 7 .

. contractor over.theLpastitwo years. As7shown,onEthe. attached

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c Man-Hour -: Deviation? Request Number 1830008 -0,1 dated /May 16,'i1983, .

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{we hadiallotted man-hours 1forfthis program.

Due to-the1currentlon going l design and-' installation.workfon"

. pipe' rupture re'straints,=thethot gap programEdetailsz had:not?yet 2

beenifinalized. On: October ~10,il984,:the-S&Lfrecommendstions

for this1 program 'we're forwarded to-(IPC (SLMI-13616,Teopylattached)~.,

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IPC~ concurred with the: S&L' recommendation onj 0ctober 24, (1984 -

~(S-4870,icopy1 attached.

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Based on the .above" discus'siori, provisions ~ for a pipe ~ rupture restraint-hot,gapicheck; program had been madegon:the Clinton

. Project. Therefore, there.is no potential for Clinton pipe l rupture;restrdints-being inadequateldue-to gap. uncertainties;

'thus, there,is no safety concern.

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- October'8, 1984?

Project' NumberE4536 -00 ;- , ,

' Illinois. Power Obmpany ,

Clinton Power Strtion . Unit?l

Pipe " Whip Rest!Eaint :

a Hot lGapiCheck1 -

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w, 'Mr. ? H_.1 R.L. Victor , .

--Manager; " Nuclear Station. ,

. Engineering-Department-Illinois: Power Company . .

.Clinton, Power -Station - V-928

'P.-0.? Box"#306?

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ClintonJ Illinois! 61727 Attention: Mr.!P. E.LWalberg -

Dear Mr. Victor:

As previously reviewed with the Nuclear Station Engineering Depart-

.. ment, Sargent & Lundy is~ recommending'a hot functional field

' inspection'of pipe whip restraint gaps .

. If Illinois' Power Company' agrees, the following will be done:

1. -Each gapped whip. restraint will be visually l inspected in the-field to assure that the pipe does:not con-tact the whip: restraint in the pipe hot position.

.2. The available' margin in design will then be used in-selecting those pipe. whip restraints which require the hot functional gap' check. These same-pipe whip restraints will be iield inspected in the hot posi-tion to compare the-measured hot gap with the calcu-lated hot gap. This is required due to the following:

. The pipe whip restraint design load is sensitive

'to.the actual gap. Gaps larger than design require-reconciliation.

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.** CNCINEERS

. CHICAGO Mr. II. R.1 Victor ~ ' SLMI - 13616 -

-Illinois Power ~' Company October 8, 1984.-

Page 2 Non-linearities'in piping systems cause variations-between the analyzed versus the actual thermal growth.; This variation may be greater.than that.

acceptable for pipe whip. restraint design.-

3. Those pipe whip restraints that have larger measured -

gaps.than design can be reconciled by:

. Pipe whip . restraint adjustment.

. Addition of shims.

. Engineering evaluation.

Please note'that hot gap checks have been requested by the Nuclear t

Regulatory Commission on other projects.

We will await your concurrence prior to initiating this program.

Very truly yours',

,/ , . , \LR . c M .! J . Shewski Mechanical Project'

/ Engineer MJS:rjp Copies:

D. Daniels

. A. E. King ~

CPS D/R Center R. C. Ileider W. G. S hwartz R. A. Witt J. Gray S. D. Killian T. A. McKenna lR. A. Parson R. E. Wadlington R. S. Walterc e

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. October;24, 1984.<

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1. ~ Mr .4 li. . 'M. : Sroka :

Sargent LI, undy! Rngineers 4

$$ East:Monroc Street,121co$

Chicago. fit <;60603-

- At t.untion d .Mr.LRay : parsons ;

'Ocar: Nr. iSrokai

• i With regard to;your letter of-October 8,- 1984 L(St.M1-13616) concerning- pipe: whip rest.raint ' hot; gap chocks, we concur with

~ , .your recommendation that. these gaps be checked ^ during- hot t func-

'tional testing. OurTprogram will: consist. of. the following:

, .(1)

.' All gapped uhip restraints will he' visually inspected to assuro-that._the pipe does not contact the whip 1ro-

• straint in the pipo hot functional position.

., L(2) . Selected whip rostraint gapa uill.he' measured and recorded.

These measured gaps will bc. compared to the predicted gaps

~

and 'those which : fall 'outaidc* their allowable tolerances will- be "submittod t.o you for additional ovaluation.

To support the above effort we will requiro you to provide the

' i following information:

!(a) A list. of all whip restraints whi*ch are gapped and there-for require inspection per (1).

(b)- 4 list of all gapped restraints requiring inspection per (2) along with t. heir predicted gaps -nnd allowabic toler-ances for^cach. -

If you have any questions please contact G. Stevens at NSED ext. 296.

Sincerely,

-)Ct.L.e w l .Jf. SuSpencer ,

[-

Director - Design Engineering Nuclear Station En61ncering

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GMS/ mms

. ' cc: R. F. Thic1, V-270 .

P. E. Walhorg,.V-928

.lf. It. Victor, V-928 Jon_Groene T-31 Bob Ziminski, T-31

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Dear Mr. -- Sroka':

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m With re~ gard ito your: letter of October 8,fl984i($1.M1-13616) ~ -

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concerning" pipe? whip i rest.rainti hotJgap! checks . "weiconcur with nyour

. recommendation;thatT cheno gap ~snbc checked during .hotefunc--- -

,;c L tional testit3g. . c our program will' consist :af the following:

(1) . : All gapped ; whip restraines will- he -visuallyfin'spected <

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to assuroLthat

the pipc7does noticontactithe) whip re-

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'straint,in the}pipethot;functi~nnal' position.

4  :(2) ' Selectied whip; restraint gaps;will: he 3measuredf an'd; reco'rded.-

These measuried: gaps will be coinpared to the. predicted:ga

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and those~which: fall outside their' allowable colerances ps -

will bei subinittod ' to . you ifor addit:f onni ovaluation. .

-To support.t:0 :above offort. we will require you to provide ~ the following, infortnation : - -

4 (a) A list.' of. all whip restraints which are gapped and there-

.for require inspection per (1). . .

(b) A list o.L n11" gapped rest- nts Jroquiring inspection per 1 (2) along with t. heir pred. . cd gaps 'and allowable toler-ances for'cach. -

~,

. If you have any queutions please contact-G. Stevens at NSED ext. 296.

Since. rely, l }, - )d<Ar.e-w. ,

['.J.SVSpencer Director - Design Engineering ,

Nuclear ~ Station Engineering GMS/imns

.: .- ' cc: =R. F.;Thiel, V-270 '

P.,E. Walhorg,LV-928 '

H.EN. Victor.-V-928 JonLcreene, T-31

, ' Bob' Zituins,ki, T-31

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ki;y F-0995 L40-84 (11-14)-L 8G.150b Clinton Power. Station _

7 Independent Design Review Standard Distributien List

. Director of, Nuclear. Reactor Regulation" Richard J. Goddard, Esq.

Attn: 'Mr.;A. Schwencer, Chief & u ^ q Office of the Legal Director Licendihg Branch No.'2 - -* U. S. Nuclear Regulatory Commission Division of Licensing Washington, D.C. 20555 U. S.. Nuclear Regulatory Commission-Washington, D.C. 20555 -Don Etchison Director, Illinois Department of James G. Keppler ' Nuclear Safety Regional Administrator 1035 Outer Park Drive Region III Springfield, Illinois 62704 U. S. Nuclear Regulatory Commission 799 Roosevelt Road Allen Samelson, Esq.

Glen Ellyn. Illinois 60137 Assistant Attorney General Environmental Control Division Byron Siegel- . Southern Region Clinton Licensing Project Manager 500 South Second Street Mail Code 416 Springfield, Illinois 62706 U. S. Nuclear Regulatory Commission Washington, D.C. 20555 Jean Foy Spokesperson, Prairie Alliance Fred Christianson 511 W. Nevada Mail Code V-690 Urbcna, Illinois 61801 NRC Resident Office Clinton' Power Station Richard-Hubbard R.R. #3, Box 228 MHB Technical Associates Clinton, Illinois 61727 1723 Hamilton Avenue Suite K.

James L. Milhoan San Jose, California 95125 Section Chief, Licensing Section Quality Assurance Branch Cordon L. Parkinson Office of Inspection and Enforcement Bechtel Power Corporation Mail Stop EWS - 305A Fifty Beal Street U. S. Nuclear Regulatory Commission P. O. Box 3965 Washington, D.C. '20555 San Francisco, California 94119 Richard C. Knop Roger Heider Section Chief Sargent & Lundy Engineers Projects Section 1-C 55 East Monroe Street U. S. Nuclear Regulatory Commission Chicago, Illinois 60603 799 Roosevelt Road Glen Ellyn, Illinois 60137

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