ML20012G575

Forwards Addl Details on Results of re-review of Max Measured Thrust Values for HPCI Valves,Per Util 920501 Response to NRC 920219 Rai,W/Respect to GL 89-10,Suppl 3. Concludes That Valves Not over-thrusted

ML20012G575
Person / Time
Site:	Hope Creek
Issue date:	03/01/1993
From:	Miltenberger S Public Service Enterprise Group
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
GL-89-10, NLR-N93002, NUDOCS 9303090310
Download: ML20012G575 (5)

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• Electric and Gas i company Steven E. Mittenberger Public Service Electric and Gas Company P O Box 236, Hancocks Bridge, NJ 08038 609-339-1100 "a Prewe ano CNef tJauw 09u<

MAR 01 1993 NLR-N93002 United States Nuclear Regulatory Commission Document Control Desk Washington, DC 20555 Gentlemen:

RESULTS OF WEAK LINK ANALYSIS FOR SUPPLEMENT 3 HPCI VALVES GENERIC LETTdR 89-10 SUPPLEMENT 3 HOPE CREEK GENERATING STATION FMILITY OPERATING LICENSE NPF-57 DC KET NO. 50-354 on May 1, 1992, PSE&G responded to a February 19, 1992 request for additional information which requested that we re-evaluate the capability of the two Supplement 3 HPCI valves. In that response, we indicated that our re-evaluation of over-thrust considerations was limited to an assessment of the motor operator, and that, once we received the. weak-link and revised seismic analyses from the valve manufacturer, we would re-review the maximum measured thrust values and make available to the NRC the results of our re-review.

We have received the necessary information from the valve manufacturer and have re-reviewed our conclusions relative to over-thrust considerations based on the new information. Based on the comparison of the information received from the valve manufacturer with the most recent test data for the subject valves, our conclusion remains that the valves are not over-thrusted. Further details on the results of our re-review based on the weak link information is provided in the attachment to this letter.

Should you have any questions or comments on this transmittal, do not hesitate to contact us.

Sincerely, D ' j' S ,

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Document Control Desk 2 '

NLR-N93002

-I C Mr. T. T. Martin, Administrator - Region I -

U. S. Nuclear Regulatory Commission .!

h 475 Allendale Road' King of Prussia, PA 19406 Mr. S. Dembek, Licensing Project Manager l U. S. Nuclear Regulatory Commissico I One White Flint North 1 11555 Rockville Pike  :

Rockville, ML 20852 Mr. T. P. Johnson (SOS) i USNRC Senior Resident Inspector Mr. K. Tosch, Chief i

NJ Department of Environmental Protection '

Division of Environmental Quality Bureau of Nuclear Engineering  :

CN 415  ;

Trenton, NJ 08625 {

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Ref: NLR-N93002 STATE OF NEW JERSEY )

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COUNTY OF SALEM )

S. Miltenberger, being duly sworn according to law deposes and says:

I am Vice President and Chief Nuclear Officer of Public Service Electric and Gas Company, and as such, I find the matters set forth in our letter dated MAR 011993 , concerning the Hope Creek Generating Station, are true to the best of my-knowledge, information and belief.

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Subscribed and Sworn to before me  ;

this f day of Ofb , 1993 31 l T_ -

liotaryPub$kcofNewJersey  ;

KIMBERLY A. HILL NOTAilY PUBLIC Of fRW JEPSEY My Commission expires on i

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3 ATTM3 MENT REEU12S OF MEAK LINK ANAIRSIS IM SUPPUMENT 3 HPCT VAINES QNIRIC 1RP11R 89-10 SUPPIDENT 3 IDE OUX GENERATDC SIATICN FK'TLT'IY OPERATDC LICDEES NPF-57 DOCKEI' 10. 50-354 NIR-N93002 In our original response to the NRC's February 19, 1992 request for acklitional information, we irdicated that our evaluation of over-thrust considerations for our two Supplement 3 HPCI valves (1 FUN-F002 and 1 FUN-F003) was limited to an a<w-~<-nt of the motor operator, ard that, once we received the weak-link ard revised seismic analyses frun the valve manufacturer, we would re-review the mwimm measural thrust values and make available to the NRC the results of our re-rwiew. We have received the manufacturer's weak-link and revised seismic analyses for 1 FUN-F002 and 1 FUN-F003 and have re-reviewed our conclusions relative to over-thrust considerations based on this new information. Our conclusion remains that neither of the supplement 3 HPCI valves is over-thrusted. This reaffirmation of our conclusion is supported by the information presented below.

The weak link and seismic report receivr* frun the valve Iranufacturer, Anchor Darling, provides the followiry thrust limits:

Valve Opening Thrust Ihtit = 35,570 lbs Valve Closing Thrust Limit = 113,000 lbs I During the fourth refueling outage at Hope Creek, both of the subject valves were tested using Liberty Technology's VOTES testirg system with the following results:

1FU N-F002 1 FUN-FV03 Maximum Opening Thrust 31,500 lbs 35,155 lbs Maximum Closirg Thrust 41,147 lbs 44,868 lbs 7hrust at 7brTJue Switch 32,729 lbs 33,532 lbs l Trip (See Note 1)  ;

Thnist at Emerg Dypass 19,776 lbs 10,702 lbs Limit Switch Tf See Note 2)

Minimum Required Thrust 25,629 lbs 25,629 lbs Target Ihrust (500 Note 3) 33,318 lbs 33,318 lbs Note 1: Thrust at torque switch trip is slightly less than et thrust for lIDN-F002 hcuever, actual zunning loads were less 1000 lhe as , rod to an a m ara running load of 2500 lbs in the values for . . reqaired thrust and target thrust.

Note 2: This valvg is limit seated when operatt.d on the emergency bypass cirulit This limit switd) is set to trip after hard s9at contact ard twlor to reaching thrust associated with torque switd1 trip.

Notg }: the additional 30 etisthrust is 130%

interdad of minimum to account requiredrate for expccted thrust; ot loading ard torque sw tch repeatability.

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. Attachment ~

NLR-N93002 Results.of Weak Link Analysis for HPCI Valves

'Ihe thrust numbers abrue have been conservatively corrected, whern applicable, to acccunt for torque corroction ard material properties issues raised by Liberty Technolcgy's recent Part 21 notification as well as possible diagnostic equipaent inaccuracies.

'Ihe maxirum opening thrust values of 31,500 lbs and 35,155 lbs for imW-F002 ard 1mW-F003, respectively, are less than the valve openirg thrust limit of 35,570 lbs prinidad by Anchor Darling. In addition, the maximum closing thrust values of 41,147 lbs ard 44,868 lbs for 1 FUN-F002 and imN-F003, respectively, are less than the valve closirg thrust' limit of 113,000 lbs provided by Anchor Darling. As a result, we conclude that no over-thrust concerns exist relative to imW-F002 (Jd imW-F003.

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