ML20064H690

Provides Notification of Changes to GL 89-10 Commitments, Per 891227 & 900831 Responses to GL 89-10.Justification for Changes & Table Entitled Valve Population Encl

ML20064H690
Person / Time
Site:	Hope Creek
Issue date:	03/11/1994
From:	Labruna S Public Service Enterprise Group
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
GL-89-10, NLR-N94015, NUDOCS 9403180125
Download: ML20064H690 (14)

Text

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~ Gmtuny Stanley LaBruna Public Servico Electric and Gas Company P O Box 236. Hancocks Bndge, NJ 08038 609-339 1700 m._,.""""

MAR 111994 NLR-N94015 United States Nuclear Regulatory Commission Document Control Desk Washington, DC 20555 Gentlemen:

NOTIFICATION OF CHANGES TO GENERIC LETTER 89-10 COMMITMENTS GENERIC. LETTER 89-10 IIOPE CREEK GENERATING STATION FACILITY OPERATING LICENSE NPF-57 DOCKET NO. 50-354 The purpose of this letter is to provide notification of changes to our Generic. Letter 89-10 commitments for Hope Creek. Our initial response to Generic Letter 89-10 was provided in NLR-N89239 dated' December 27, 1989 and NLR-N90179 dated

' August 31, 1990 and stated that, to date, we had not identified any exceptions to the generic letter recommendations cnr schedule.

Based upon knowledge and experience gained since our' original response, we believe an exception is now' appropriate and can be adequately justified. The specific exception being addressed in this letter involves our intent to discontinue dynamic testing of small globe valves having a. low design basis' differential pressure (less than or equal to two inches and less than or equal to 500  !

paid). We have evaluated the results of EPRI testing of globe valves and completed an evaluation of our utility specific test results. Based on this information, we believe that the above referenced valvo population has demonstrated acceptable performance, and we believe that dynamic testing is not necessary in order to demonstrate,-with a sufficient level of' confidence, the capability of each of these' valves to perform under design basis conditions. Although we intend to discontinue dynamic testing of-the subject valves, we still intend to perform static;

' testing. Details of our justification for the commitment change are provided in the attachment to this letter.

This action is considered a Cost Beneficial Licensing Action, and we have estimated the cost savings of this change in commitment during the upcoming year to be in excess-of $1 million.

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9403180125 940311 obi PDR ADOCK 05000354 .l.

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l MAR 11 1gg4 Document Control Desk 2

< NLR-N94015 Should you have any questions or need additional information relative to thic letter, please do not hesitate to contact us.

Sincerely, cfh ,

Attachment (2)

Affidavit e

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

U. S. Nuclear Regulatory Commission 475 Allendale Road King of Prussia, PA 19406 Mr. J. C. Stone, Licensing Project Manager - Hope Creek U. S. Nuclear Regulatory Commission One White Flint North 11555 Rockville Pike-Rockville, MD 20852 Mr. C. Marschall (SOS)

USNRC Senior Resident Inspector Mr. K. Tosch, Manager, IV NJ Department of Environmental Protection Division of Environmental Quality Bureau of Nuclear Engineering CN 415 Trenton, NJ 08625 4 I

, . . , m , , . . , . - , -, s - - . e - ,

4 REF: NLR-N94015 STATE OF NEW JERSEY )

) SS.

COUNTY OF CALEM )

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

I ani Vice President - Nuclear Engineering of Public Service

' blectric and Gas Company, and as such, I find the matters set i

1 forth in the above referenced letter, concerning the Hope Creek j i

Generating Station, are true to the best of my knowledge, information and belief.

I r v ks1Y/$w l

l Subscribed and Sworn t before me this / / dd- ,

day of , /0#1 *

, 1994

. 11 < IA t- ]I LOIi!)A -

NotaryPublichof'NewJersey KlMBEfilY JD 000WN NOTARY PU8 tlc OF NEW JERSEY My Commission expires on "I C0033 Ion Endes Agil 21,199g a .. . . ,, , ...

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ATrNJPENT JiffrIFICATIN 101 G2ERIC IEPIH189-10 COMPIMNT OIANGE IUITFICATICE OF OIANZS TO GNEIUC IEPIER 89-10 CDMPINNfS G2ERIC IEPITR 89-10 IDPE OE1X GRERATING STATIM FACILITY OPWATING LIONSE NPF-57 DOCKEP NO. 50-354 NIR-N94015 I. INITOLUCTION 1he purpose of this attachment is to provide justification for eliminating dynamic testing of small globe valves having a low design basis differential pressure (less than or equal to two inches and less than or equal to 500 psid). This population of valves has demonstrated a high level of acceptable performnce, ard PSE&G believes that dynamic testirg is not tw-ry in order to demonstrate, with a sufficient level of confidence, the capability of each valve to perfom under design basis conditions. 'Ihis action is consistent with the goals of the Cost Ihneficial Licensirq Action Initiative.

II. VALVE POWIATION AND ASSOCIATED JUSTIFICATIONS On the basis of globe valve dynamic tests performd to date by PSE&G, EFRI, aid other utilities, PSE&G believes that small, low differential pressure globe valves (less than or equal to two inches ard less than or equal to 500 psid) perfom predictably under dynamic conditions with switch settings established under static conditions in accordance with our mtor operated valve (10V) Programmatic Standard and switch setting methods.

The reason for this globe valve predictability can be understood by examining the manner in which these globe valves react to applied dynamic loads. The primary dynamic loads that may affect the ability of an 10V to achieve its safety position urder design basis conditions as cmpared to static conditions involve disc forces, stem friction forces, and cperator sprirg pack behavior. In accountirg for these forces, the chief difference between gate and globe valves is the manner in which the differential pressure forces acrcss the disc for each valve type is determined. In accounting for globe valve differential pressure forces across the disc, little to no friction is involved because the flow across the seat tends to center the disc. For a gate valve, additional friction may be present as the disc slides across the seat. Thus, globe valves may be considered more predictable because disc friction and disc contact surface cordition minimally affect the motor operator output requirements.

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Attachment NLR-N94015 Changes to GL 89-10 Commitments l

PSE&G has tested appmximately 20% (29/118) of the total Generic letter 89-10 globe valve population at Salem and Hope Creek uMer differential pressure corriitions. In all cases, the target thnist value established by our WN Pmgramatic StaMard and the resultant static actuator switch settings were sufficient to bourd the differential pressure test closing thrust requirements, including extrapolated values to design basis l coniitions. l The majc-ity of the valves tested am two inch or smaller with only two havirq a (gh design basis differential pressure. In achieving greater I than 90% the design basis differential pressure in the tests for the tw high Lfferential pressure valves, the reverse determination for the v w ert alve factor yielded values of nearly unity (1.0). This is t wtmc with actuator sizing methodology considerirg the uncertainties I s3nized to exist with thrust meastatuait equipment. The other small valves were tested at substantially lower differential pressures in acx:ordance with their design bases. Psverse determinations of apparent valve factors for these valves yielded a range of values with all but two below the 1.1 value assumed in our calculations. For the two valves with higher valve factors, the calculated values were 1.50 and 1.56. In our judgement, the higher valve factors can be attributed to the following set of circumstances and phenomena. The thrust sensors employed react to the turbulence caused prior to valve seating such that the thrust traces l contain noise or vibrational energy dissipated in the yoke. For the low differential pressure tests, this noise has the potential to mask actual stem thrust at flow cut off causing an artificially high apparent valve factor. It must be remembercd that all of these valves did, in fact, perform satisfactorily with no anamolous behavior and with sufficient margin of capability during dynamic testing.

Three cases in the subject population having cmparable design features and perfonnance requirements were arbitrarily examined by cmparing static to dynamic thrust measurements at torque switch trip. Each case exhibitcd essentially identical results for thrust at this point. This irdicates that static test results thmugh our switch setting methods can be relied upon for the subject MOVs to satisfy design basis requirecients.

EPRI also performed scue limited testhq of globe valves as part of tN MCf/ Performance Prediction P1:Wauu. A total of six valves of various sizes ard pressure classes from four different manufacturers were involved. All testiry corducted at low differential pressure conditions demonstrated good agreement with predictive metixds.

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Attachment NLR-N94015 Changes to GL 89-10 Commitments ihtust margins have been conservatively calculated and are provided in the table attached to this letter. The predictability of the subject valves coupled with their large calculated thrust capability margins provide a high level of confidence that they will satisfy all performance requirements under design basis conditions. Our testiry has validated that the method used to determine required thrust and switch settings for globe valves is both reasonable and canservative. As iniicated above, our test experienos has demonstrated that established target thrust values and the resultant static switch settings were more than adoquate to bound the differential pressure test closing thrust requirments, incitriing extrapolated values to design basis conditions.

Based on the discussion provided above, we believe that continued testing of small, low differential pressure globe valves provides limited ack11tional assurance of valve capability and, therefore, negligible benefit to safety. In adiition, testing of the subject valves 1xnld unr-mrily require considerable time and resources to ccuplete and would, therefore, create a distraction and divert resources that could be more effectively applied in other areas.

As a result of the above infoantion, we will consider the baselina and dynamic performancx3 testing recmmendations of the generic letter satisfactorily addressed for the subject MJVs upon corpletion of switch settin] verification tests errler static conditions. In the future, their performance will be monitortd as part of the tracking and trending program.

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TABT VAIVE IDIUIATIG NOTIFICATIm OF GANES 'IO GENHlIC IEI'ITR 89-10 CCMEDENIS GFNHtIC IEI'ITR 89-10 10PE GEEK GDERATDC STATION FN'TTJ'IY OPERATDC LIOKE NPF-57 DOO TT NO. 50-354 NIR-N94015 A description of each of the subject valves along with its calculated thrust manJin is provided belcw. Thrust margins provided are based on limit switch .

operation since the torque switches for the subject valves are bymW when l the valves are perfonnirg their safety function. As a result, the valves have  ;

access to the full capability of the motor cperator to achieve their safety l position. This capability conservatively considers degradcd voltage Itotor I output and a stem friction value of 0.15. The valves which have already been dynamically tested are identified with an asterisk.

A Main Steam System Valves i l

VALVE NUMBER 111FUST MAIGIN VALVE DESCRIPTION 1AlllV-F071 192% Main Steam Line Downstream Header  !

Isolation Valve (2" Globe)  !

Although our calculations for this valve conservatively assume a differential pressure of 1035 psid, the realistic value is approximately 25 psid.

B. Feedwater System Valve VALVE tGIBER 711FUSP MARGUI VALVE DESCRIPTION 1ADN-4144 97% Feedwater Supply Headers Cross Connect Valve (2" Globe)

C. RHR Systma_V31ves VALVE NUMBER 311 RUST MAIGIN VALVE DESGIPTION 1 DON-5055A 213% RHR Icop A to H2 Recmbiner Isolation Valve (2" Globe) 1EO N-5055B 207% RHR Loop B to H2 Recmbiner Isolation Valve (2" Globe)

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I Table NLR-N94015 l Changes to GL 89-10 Commitments  !

D. RCIC System Valve VALVE NUMBER 'nWST MATGIN VALVE DESCRIPTION 1BCEN-F046 188% RCIC Cooling Water Valve (2" Glche)

Although our calculations for this valve conservatively assume a differential pressure of 1507 psid, the realistic value is approximately 100 psid.

E. Control Rod Drivg ifvdraulic System Valves VALVE NUMBER TINST MARGDI VALVE DESCRIPTION 1BFIN-3800A 285% CRD to A Recirculation Ptmp Seal' Isolation Valve (2" Glcbe)

IBFIN-3800B 285% CRD to B Recirculation Punp Seal Isolation Valve (2" Globe)

Although our calculations for this valve conservatively assume differential pressures of 1534 and 1530 psid, the realistic values am approximately 500 psid.

F. HFCI System Valves VALVE NUMBER 'IHRUST MARGIN VALVE DESCRIPTION 1BRN-4803 48% Suppmssion Pool Invel LP Instrument Tap Isolation Valve (2" Globe)

IBRN-4804 48% Suppression Pool level HP Instrument Tap Isolation Valve (2" Globe) 1 BEN-4865 103% Suppression Pool Invel LP Instrument Tap Isolation Valve (2" Glcbe) 1 BEN-4866 lolt Surpression Ibol level HP Instrument Tap Isolation Valve (2" Globe) 1BRN-1059 487% HPCI Cooling Water Valve (2" Globe)

The IBRN-4803 and 1BRN-4804 valves have lower thrust margins than many of the other valves within the sccpe of this letter; however, when viewed frcn a valve capability perspective, these valves are capable of acccmxlating a valve factor of approximately 5.3.

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Table NLR-N94015

. Changes to GL 89-10 Commitments G. Miel Pool Cbolim and Cleanun System Valves VALVE } UMBER UUUST MARGIN VALVE DESCRIPTIGi LEON-4647 169% Service Water Icop A to Fuel Fool Makeup Valve (2'? Globe) 1EQ W-4648 176% Service Water Iccp B to Fuel Ibol Makeup Valve (2" Globe)

H. SACS System Valves VALVE ? UMBER UlRUST MARGIN VALVE DESCRIPTION 1EGN-2320A 97% SACS loop A Return from A Primary (bntainment Instrument Gas Compressor Cooler Isolation Valve (2" Globe) 1EGN-2320B 92% SACS Icop B Return fran B Primary Containment Instrument Gas Ccatpressor Cooler Isolation Valve (2" Globe) 1EGN-2321A 159% Prirary Containment Instrument Gas Compressor Cooler A Cutlet Cross Connect Valve (2" Globe) 1EGN-2321B 154% Primary Containment Instrument Gas Compressor Cooler B Outlet Cross Connect Valve (2" Globe) 1EGIV-2446 76% Service Water Makeup to SACS Icop A Isolation Valve (2" Globe) 1B2N-2447 71% Service Water Makeup to SAG Iccp B Isolation Valve (2" Globe) 1EGN-2452A 97% SAG Icop A Supply to A Primary 1 Containment Instnment Gas Ctatpressor Cooler Isc;1ation Valve (2" Globo) 1EGN-24520 92% SACS Icop B Supply to B Primary l Containment Instrument Gas j Cctrpressor Ccoler Isolation Valve (2" Globe) l 1EGN-2453A 159% Primary Containnent Instrument Gas Ctx: pressor Cooler A Inlet Cross Connect Valve (2" Globe) l l

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i Table N LR-N94015 >

Changes to GL 89-10 Commitments 4 II. SACS System Valygsj0ontinued) ,

1 VALVE NUMBER 'IHEUST MARGIN VALVE DESCRIPTION I 1H2N-2453B 149% Primary Containment Instrument Gas Ompressor Cooler B Inlet i Cross Connect Valve (2" Globe) J I

'Ihe lIX2N-2446 and 1EGN-2447 valves have lower thrust margins than many ]

of the other valves within the scope of this letter; however, when viewrd from a valve capability perspective, these valves are capable of  ;

axcznodating a valve factor of approximately 3.7. l I. RCIC 'Ibrbine Steam System Valve VALVE NUMBER 'IHRUST MARGIN VALVE DESCRIPTION 1FO N-F060 255% RCIC Vacuum Pump Discharge Isolation Valve (2" Globe) j l

J. HICI Turbine Steam System Valve j VALVE NUMBER 'HIRUST MARGIN VALVE DESCRIPTION i 1FDIV-4922 261% HPCI Vacuum Pump Discharge .

Isolation Valve (2" Glche)

K. Ccntainment Atmosphere Co_Gtml System Globe Valves VALVE NUMBER 'DIRUST MARGIN VALVE DESCRIPTION 1GSIN-4955A 1122% Containment Atmosphern A H202 Analyzer Uger Drywell Suction Inboard Isolation Valve (2" Globo) 1GSIN-4955B 1112% Containment Atmosphere B H202 Analyzer Upper Drywell Suction Inboard Isolation Valve (2" Globo) 1GSIN-4959A 669% Oontainment Atmosphere A H202 Analyzer Suppression Pool Suction Inboard Isolation Valve (2" Globe) 1GSkN-4959B 646% Containment Atuosphere B H202 Analyzer Suppression Pool Suction Inboatti Isolation Valve (2" Globo)

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Tablo NLR-N94015 Changes to GL 89-10 Commitments K. Containrognt Atnocrtere Control System Globe Valves (Cbntinued)

VALVE NUMBER 'IURUST MATGIN VALVE DESCRIPTION 1CSIN-496SA 925% Containment Atmosphere A !!202 Analyzer Suppression Ibol Suction Outboard Isolation Valve (2" ,

Globe)  !

1 1GSIN-496SB 885% Containmnt Atacophore B H202 l Analyzer Suppression Pool suction l Outboard Isolation Valve (2" Globe) 1GSIN-4966A 661% Containment Atmosphere A H202 Analyzer Suppression Pool Return Inboard Isolation Valve (2" l Globe) 1GSIN-4966B 669% Containment Atmosphere B 11202 Analyzer Suppression Pool Return Inboard Isolation Valve (2" Glcbe) 1GSIN-4974 171% Containment Nitrogen Makeup outboard Isolation Valve (2" Globe)  !

l 1GSIN-4983A 887% Containment Atmo6There A H202 Analyzer Upper Drywell Suction outboard Isolation Valve (2" Globo) 1CSIN-4983B 850% Containment Atmosphere B H202 Analyzer Upper Drywell Suctilon outboard Isolation Valve (2" Globe)

- 1CSIN-4984A 646% Containment Atmosphere A 11202 Analyzer lower Drywell Suction Outboard Isolation Valve (2" Globe) 1GSIN-49848 638% Containment Atmo6There B H202 Analyzer Irwer Drywell Suction Outhoard Isolation Valve (2" GloLA) 1GSIN-5019A 624% Containmnt Atmosphere A H202 Analyzer Iower Drywell Suction Inboard Isolation Valve (2" Globo)

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Table NLR-N94015 Changes to.GL 89-10 Commitments K. Containment AtamThere Control System Globe Valves (Continued)

't VALVE NUMBER 'nHUST MARGIN VALVE DESCRIPTION 1GSIN-5019B 624% . Containment Atmosphere B H202 i Analyzar Iower Drywell Suction i Inboard Isolation Valve (2" l

Globe) 1GSIN-5022A 692% Contairnent Atmosphere A H202 4- Analyzer suppression Pool Return Outboard Isolation Valve (2" Glcbe) 1GSIN-5022B 685% Containment Atmosphere B H202 Analyzer Suppression Pool, Return Outboard Isolation Valve (2" Globe) 1GSHV-5057A 216% Cbntainment H2 Recmbiner A RHR Outboard Isolation Valve (2"

Globe) 1GSIN-5057B 223% Containment H2 Recmbirer B RHR Outboard Isolation Valve (2" i

Globe)

L. Containment Instnntent Gas System Valves

, VALVE NUMBER 'nHUST MARGIN VALVE DESCRIPI' ION I

1KUN-5124A 791% Primary Containment Instrument Gas Supply Header A Shutoff Valve (2" Globe) 1KUN-5124B 770% Primary Containment Instnment Cas Supply Header B Shutoff Valve (2" Globe) 1KuiV-5126A 97% Primary Containment Instrument Gas Sugply Header A' Outboard Isolation Valve (2" Globe) 1KUN-5126B 92% Primary Containment Instrument '

Gas Supply Header B Outboard Isolation Valve (2" Globe).

1KUN-5147 183% Primary Containment Instrument -

Gas Ctmpressor A Suction Outboard Isolation Valve (2" Globe)-

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1 Table NLR-N94015 J Changes to GL 89-10 Commitments L. Contairumnt Instrument Gas System Valves (Coatinued)

VALVE NUMBER 71IRUST MARGIN VALVE DESCRIPTION i l

1KUN-5148 171% Primary Containnent Instrument i Gas Otxtanon Ocstpressor Suction '

Inboard Isolation Valve (2" Globe) 1KUN-5152A 149% Primary Containment Instrument Gas Sumly Header A Inboard Isolation Valve (2" Globe) ,

1KUN-5152B 154% Primary Containment Instrument l; Gas Supply Header B Inboard Isolation Valve (2" Globe! l 1KUN-5160A 125% Primary Containment Instrumnt Gas Ctatpressor A IOCA Suction Isolation Valve (2" Globe) 1KUN-5160B 119% Primary Containment Instrument Gas Otxtpressor B IDCA Suction Isolation Valve (2" Glche) l IKUIV-5162 177% Primary Containment Instrument Gas Ctatpressor B Suction Outboarti Isolation Valve (2" Globe) 1KUN-5172A 123% Primary Containment Instrument l Gas to Vacuum Bruaker Amm11ator A Suction Isolation Valve (2" Globe) 1KUN-5172B 128% Primary Containment Instrument Ces to Vacuum Breaker Ammilator B Suction Isolation Valve (2" Globo) 11 MSIV Steam Sealim System Valves VALVE NUMBER 711FUST MARGUI VALVE DESCRIPTION 1}G4N-5829A 506% Inboard Seal Gas Supply Header Shutoff Valve (2" Globe) 1KHN-5829B 506% Outboard Seal Gas Supply Hoader Shutoff Valve (2" Globe) 1KRN-5834A 593% Steam Line A Seal Gas Supply Inboard Isolation Valve (2" Glcbe)

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Table NLR-N94015 Changes to GL 89-10 Commitments l

l M. 331V Steam Scalim System Valves (Continued) i VALVE NUMBER 'I100ST MATODI VALVE DESGIPfION 1 m lV-5834B 593% Steam Lim A Seal Gas Supply outboard Isolation Valve (2" Globe) 1 E N-5835A 593% Steam Lim B Seal Gas Supply Inboard Isolation Valve (2" Globe) 1 m lV-5835B 593% Steam Line B Seal Gas Su@ly .

l Outboard Isolation Valve (2" Globe)

I m !V-5836A 581% Steam Line C Seal Gas Supply j Inboard Isolation Valve (2" l Globe) l l

1 m N-5836B 593% Steam Line C Seal Gas Supply l Outboard Isolation Valve (2" l Globe) 1 1 m lV-5837A 605% Steam Line D Seal Gas Supply Inboard Isolation Valve (2" Globe)

I mlV-5837B 593% Steam Line D Seal Gas Supply Outboard Isolation Valve (2" Globe)

N. Plant Lea}LDetection System Valves )

q 1SMIV-4953 118% Irak Detection Gas Sample Outboard Isolation Valve (2" j Glom) j 1

ISMN-4957 843% Isak Detection Gas Sanple Return Inboard Isolation Valve (2" Globe) 1SMIV-4981 910% Irak Detection Gas Sanple

]

Return Outboard Isolation Valve l (2" Globe)

ISMN-5018 97% Icak D3tection Gas Sample "

Inboard Isolation Valve (2" Globe)

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