ML20099D114

Forwards Sargent & Lundy Response to Rev 0 to Observation Rept 25 Re Rigidity of Motor & Air Operated Valves W/Extended Masses.Rept Reviewed by Util

ML20099D114
Person / Time
Site:	Clinton
Issue date:	11/14/1984
From:	Victor H ILLINOIS POWER CO.
To:	Parkinson G BECHTEL GROUP, INC.
References
F-0997, F-997, NUDOCS 8411200202
Download: ML20099D114 (6)

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.L40-84(11-14)-L 8G.150b-i

. lLLINDIS' PO WE COMPANY

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-Mr. Gordon'L. Parkinson.

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1Bechtel Power Corporation-Fifty Besla Street San Francisco, CA-94119 Dear Mr; Parkinson Enclosed.is S&L's response to Observation Report Number 25, Rev.~ 0.

~ This response has been reviewed by Illinois Power.

1 Sincerely-yours.

1. R$W

=-H. R. Victor Manager.

Nuclear Station Engineering

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. Dear Mr.<Geier.

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.'.. Enclosed isja-copycof(th'e~below'.111sted1 Resolution Reports with the proposed resolutionJ(Items 5 andi6)?: completed.by Sargent & Lundy:.

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Resolution Report Number 2'5,~Revi' ion'01 I

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' Resolution Report Namber'26,? Revision ~0 We are 'also enclosing a copy of the' corresponding. observation Reports?

for completeness.

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~Please review our. proposed resolution and,'if you' concur,-sign Item 7

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of the' Resolution' Report and' forward thc/ report to the. independent..

reviewer.

Also, please. return,a copy of the signed' Resolution Report

'i to Sargent & Lundy for our records. -

Yours very truly

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R. C. Heider Project Manager RCHand Attachment - all recipients i,

D. P. Hall E. L. Branch L

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Victor.

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F.'A.-Spangenberg (oricinals)-

W. G. Schwartz

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.CLINTON' POWER STATION' V

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OBSERVATION REPORT- -

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File No.2 25 - ;

' File: Revision No.'

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.Date October ZZ,1954 9:

E1.f. Level 1. classification of' Observation:

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"'Notsignificantlto' safety; L.'.

- T Additional information required :*See -5, "Recomendation for resolution" Significant to safety,, send to Level.2 Committee!

. 2. C StEucture(s)'; ! system (s), L or component (s)iinvolved:l

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sSW System,. '

. Motor and a r operated va ves>w t_.

, i h extended masses ~

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3.

Description of..' Observation:

I iThe S&L modelfofImotor and-air operated valves 'with extended masses may bei more rigidithan the actual situation due to possible amplification through'

.the valve superstructure. There does not appear to'be a correlation i

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between the way the valve yoke ts modeled and the.actualf stiffness.of the

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i yoke or frequency lof the valve superstructure / operator.

4 4.

Significance of Observation:

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.The potential exists that the calculated' acceleration lmight not be adequate, especially for.those cases when a valve is subjected to hydrodynamic forces.

i-5.- Recomendation for resolution (optional):

!-l' S&L should verify that the model for these valves adequately represents the actual situation, and that the calculated accelerations are justified.

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6 Signatures:

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CLINTON POWER STATION

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RESOLUTION REPORT Fil e ~ No.

25 File Revision No.

0 Date.0ctober.22,1W l'.; Resolution by Level 1

Internal Review Committee 2.'

Classification of Observation; a.

Not valid (see continuation sheet)

b..

Not significant to safety c.

X Additional information required.

d.-

Significant to safety-

3.. Program ' resolution.is:

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C1osed-item b.

X Action to be taken' by Reviewee 4.1 Review Committee signatures:

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Reviewee pro sed res,olution:

a. Description of proposed resolution:

(See Continuation Sheet:)

b. Basis of proposed resolution:

(See Continuation Sheot) 6 Reviewee response report signed by

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Illinois Power Co. Review :

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- CLINTON POWER STATION

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Job 15478-003 RESOLUTION REPORT

(continuation sheet)-

-File No..

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- File Revision No.

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S&L Description of.-Proposed Resolution for Observation Report File No.;,25-The method-used by SargentL& Lundy to model valves with eccentric

-mass.was-found to be' acceptable to the NRC. - The' justification

.for this modeling. technique is. documented in. Volume 19 of the FSAR,

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F-0997 L40-84(11-14)-L-18G.150b-

.Clinton-Power Station'-

Independent-Design Review Standard Distribution List Director of Nuclect BeactoriRegulation.

Richard J. Goddard,.Esq..

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. NAkt' i/[NrhAUSchwencer.:-Chief : d Office of the Legal. Director a

Licensing Branch No. 2 U.-S. Nuclear Regulatory Commission Division of-Licensing Washington,-D.C.- 20555 JU. S. Nucleac Regulatory' Commission :

. Washington, D.C.

20555f Don Et'chisoni Director,LI111nois-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

_ Urbana, Illinois 61801 NRC Resident Office Clinton Power Station Richard Hubbard R.R. f3, 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 Gordon 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 i

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