ML20090E126

Revised Final Deficiency Rept Re Failure of Westinghouse Motor Operated Gate Valves to Tightly Seal Against Differential Pressure When Tested at Svc Conditions or Analytical Methods.Corrective Mods Completed

ML20090E126
Person / Time
Site:	Seabrook
Issue date:	06/22/1984
From:	Devincentis J PUBLIC SERVICE CO. OF NEW HAMPSHIRE, YANKEE ATOMIC ELECTRIC CO.
To:	Starostecki R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
SBN-675, NUDOCS 8407190301
Download: ML20090E126 (7)

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SEABROOK STAM PUBLIC SERVICE Engirmedng Office:

I Company of New Hampshre 1671 Worcester Roed Framingham, Massachusetts 01701 V (617) - 872 8100 June 22, 1984 SBN- 675 T.F. Q2.2.2 United States Nuclear Regulatory Commission Region I 631 Park Avenue King of Prussia, PA 19406 Attention: Mr. Richard W. Starostecki, Director Division of Project and Resident Programs

References:

(a) Construction Permits CPPR-135 and CPPR-136, Docket Nos. 50-443 and 50-444 (b) PSNH Letter, August 23, 1982, " Final 10CFR50.55(e) Report; Westinghouse Motor-Operated Gate Valvea (4-inch to

,18-inch)", J. DeVincentis to R. W. Starostecki

Subject:

Revised Final 10C5'R50.55(e) Report; Westindhouse Motor-Operated Gate Valves

Dear Sir:

Reference (b) provided the following information for Westinghouse motor-operated gate valves which have failed to tightly seal against differential pressure when tested at their service conditions or through analytical methods. Table 1 of Reference (b) included the following:

o Valve Function o Valve Location Number o W EMD Model Reference Number o Maximum Delta P (psi) as Flow Approaches Zero o Consequence of Failure to Close o Corrective Modifications 8407190301 840623 PDR ADOCK 05000443 g S PDR I E- 1] ,

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United States Nuclear Regulatory Commission June 22, 1984

, JAttention: Mr. Richard W. Starostecki, Director Page 2 i

The corrective modifications to these valves have been completed by our W~~

field representatives.. The corrective modifications delineated in the referenced letter (Table 1) have been revised as indicated on the attached annotated' version of Table.l.

Very truly yours, YANKEE ATOMIC ELECTRIC COMPAhT L JlLs ohn DeVincentis Engineering Manager Attachment

'cc: Atomic Safety and Licensing Board Service List Director, Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, DC 20555 4

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William S. Jordan, III, Esquire Brentwood Board of Selectmen Harmon & Weiss RED Dalton Road 1725 I Street, N.W. Suite 506 Brentwood, New Hampshire 03033 Usshington, DC 20006 -

Roy P. Lessy, Jr., Esquire Office of the Executive Legal Director Edward F. Meany U.S. Nuclear Regulatory Commission Designated Representative of Washington, DC 20555 the Town of Rye 155 Washington Road Robert A. Backus, Esquire Rye, NH 03870 116 Lowell Street P.O. Box 516 Calvin A. Canney Mancehster, NH 03105 City Manager City Hall Philip Ahrens, Esquire 126 Daniel Street Assistant Attorney General Portsmouth, NH 03801 Department of the Attorney General Augusta HE 04333 Dana Bisbee, Esquire Assistant Attorney General Mr. John B. Tanzer Office of the Attorney General Designated Representative of 208 State House Annen the Town of Hampton Concord, NH 03301 5 Morningside Drive Hampton, NH 03842 Anne Verge, Chairperson Board of Selectmen Roberta C. Fevear Town Hall Designated Representative of South Hampton, NH 03642 the Town of Hampton Falls Drinkwater Road Patrick J. McKeon Hampton Falls, NH 03844 Selectmen's Office 10 Central Road Mrs. Sandra Gavutis Rye, NH 03570 Designated Representative of the Town of Kensington Carole F. Kagan, Esq.

RFD 1 Atomic Safety and Licensing Board Fanel East Kingston, NH 03827 U.S. Nuclear Regulatory Commission Jo Ann Shotwell, Esquire Assistant Attorney General Mr. Angie Machiros Environmental Protection Bureau Chairman of the Board of Selectmen Department of the Attorney General Town of Newbury One Ashburton Place J9th Floor Newbury, MA 01950 Boston, MA 02108 Town Manager's Office Senator Gordon J. Humphrey Town Hall - Friend Street U.S. Senate Amesbury, Ma. 01913 Washington, DC 20510 (Attn: Tom Burack) Senator Gordon J. Humphrey 1 Pillsbury Street Diana P. Randall Concord, NH 03301 70 Collins Street (Attn: Herb Boynton)

SEabrook, NH 03874 Richard E. Sullivan, Mayor Donald E. Chick City Hall Town Manager Newburyport, MA 01950 Town of Exeter 10 Front Street Exeter, NH 03833 a

T TABLE I s MAXIMUM P (pet) AS FthW APPROACHES ZERO '

VA LVE W EMD FINAL a.% wAur.;.s.MTIOu i p ECDou ,..,w.s@r!r. L.sauspi! ORA 6._ ---r=aw x A A .c w

. FUNCTION WUMBER REFERENCE SPEC REQUIREMENT CONSEQUENCE OF FAILURE TO CLOSE

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CORRECTIVE NODIFICATIONS VCT Outlet LCV-1128 4CM72Fs 200 100 Two valves to settes; fatture of either Torque switch adjustment valve to close reduces redundancy of g%gaf providing isolation. Alternate valve

. will provide isolation.

s VCT Outlet LCV-I t2C 4CM72Ft 200 100 Two valves in series; fatture of either Mone required .

valve to close reduces redundancy of providing toelation. Alternate valve will provide teolation.

245T to LC V-1120. E 8CM72T8 200 200 Suction One MOV in each of two parallel paths free Adjusted torque sw! ch setttog of CCPs the RUST to suction of the CCFs fatture Changed gear ratto (jyg(k(SW) reduces redundancy of providing isolation Changed torgue evt h spring pack of EUST during the rectrculation phase following a LOCA. Isolation wit! be provided by a check valve in settes with the two paths.

RNR Suction 87018 12CM88SE 700 700 Isolation. Two valves in series; fetture of inner Adjusted torque sw! ch settings Inner Isolation valve to close reduces redundancy of providing isolation. Changed gear ratto (jygj{,, g gng(yr Isolation is provided by closing the outer valve.

87025 L2CM38SE 700 700 Two valves in sortes; fatture of inner Adjusted torque switch settings isolation valve to close reduces Changed gear rat to redundancy of providing teolation.

Isolation is provided by closing the 42 odd outer valve.

RHR Sucaten 87014 L2CM88SE 700 700 Two valves In series; fatture of outer Isolation, Adjusted torque swt ch settings Inner tsotation valve to close reduces Changed gear ratto (Jpgjkgghg(

redundancy of providt ag isolation.

Isolation is provided by closing the Inner valve.

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• 3 TABLE 1 MAILMUM P (pst) AS FLOW APPROACHES ZERO VA LVE U EMD FINAL

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SPEC REQUIREMENT CONSEQUENCE OF FAILURE TO CLDSE CORRECTIVE NOOIPICATIONS 8702A 12CM88SE 700 700 Two velves in settest f atture of outer Adjusted torque owltch settless isolettoa valve to close reduces Changed gear rette redundancy of providing tsotation. M(g leolation to provided by closing the V inner valve. e RNR Discharge 87164.5 8CM74FE 700 300 i

Cro ss Connect Fatture of valve to close reduces Adjusted torque evttch settlags redundancy of providing low head train separation during CL rectreutation phase f ollowing a LOCA. Train separetton can be achieved by closing other valve.

RMR H E 8804A 8CM74FE 700 300 Discharge Valve is opened for rectrculation phase Adjusted torque switch settlage

to CCP following a LOCA. Failure of valve to Suetton close precludes realignment of RNRS for normal operation.

RHR HI 88048 8CH74FE 700 300 Di scha rge Valve is opened for rectreulation phase Adjusted torque switch setttogs to 51 following a LOCA. Fatture of valve to Pump Suction close precludes realignment of RNRS for I

normal operation.

m35T to SI 8806A.4 8CM72Fs 200 Pump Suction 200 Valve is closed for rectreutetton phase following a LOCA. If valve falls to AJjusted torque swt ch ,settlage Changed gear retto puklefW close, backflow into RWST to prevented Changed torque swt h spring pa by check valve in Line.

CCP Section 8807A 8 6CM72F8 200 200 to St Puep Two valves in para ttet (8807A.8) in "

b Sec t io n sortes with one valve (8924); f atture h*ggidsk ke Q( %)h $

Cro s sove r of any one valve to close wttl mee MLNDL v 8924 6CM72F8 200 200 DVM WYWef4dkOMel$nC W. b$d OFjtJf.SN h Sff %

Two estves in parattet (8807A.8) in Adjusted torque switch settings series with one valve (8924); fatture Changed gear tatto of any one valve to close wilt not Changed torque switch spring pack preclude tsolation.

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. l TA8LE 1 MAXtMGM P (ps!) AS FIDW APPROACHES ZERO x_- ,;g - -- v& W ,- . . g wiu_ ; _ - 2.,__ -

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• LVE LOC 4ft0N MODEL EQUt F.

FUNCTIONAL FU NCTION NUMaER RE FER E MCE SPEC REQUIREMENT CONSEQUENCE OF FAILURE T3 CLOSE CORRECTIVE NODIFICATIONS Accusulator 88084.0.C.D 10CM88FN 2750 0 valve to closed to prevent RCS Ot sch arge Mone required pressertration during cold shutdown operations. If the valve fatte to close, the accueulator ear be depressurtsed by ,

wanting the N2 to the containment. .

RHR Pusp 86094.5 8CM78FN 2750 200 CL Valve is closed for switchover froe CL Mone required In}ection to HL rectrentation. Fat ture of valve to close will degrade flow to HLs.

RWST to $812A.5 120M74FE 700 100 RHR heap Valve to closed for rectreutetton phase None required following a LOCA. If valve fails to Section close backflow into RUST to prevented by check valve in Line.

Soa p 88114.5 16CM74FE 100 100 Valve is opened for rectrentation section None required following a LOCA. Valve would be closed for contatnoent.tsolation. Valve is enwapsulated utthin a protective housing wtich acts as the redunient containment Isoletion.

51 hver 88214.8 4CM7FFH 1500 1500 Vitwe is closed for switchover from CL to Adjusted torque switch settiags H. rectreutation. If valve falls to Changed gear retto cl se. Alternate Isolation valve 8885 can Changed torque settch spring pac be closed.

RH4 Mt 88404.R SCM78 700 200 Valve to closed for switchover f rom HL to Discharge Nor4e req stred to HL CL rectreutation following a LOCA. If valve f atte to close, isolation is provided by closing the RHR discharge cross connect valves.

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TASLE I MAttMUM P (pst) A5 FtDW APPROACHES ZERO .

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. V A LVE thCATION MODEL EQUlF. FUNCTIONAL F U1eCTIO N Nt)s tER RE FER ENCE SPEC REQ'J1REMENT CONSEQUENCE OF FAILURE TO CtDSE CORRECTIVE M001FICAft0NS

• Chg . Line 8805.8106 )CM99 2750 2750 Two valves in series; f atture of either haplace valves Isoletten valve to close reduces redundancy of providtag isoletton. Alternate valve will provide toolatton. ,

er0RV stock 80004,8 3CM99 2750 2500 valve is closed to toolate e leaking Baptace valves or stuck open FORV. Fatture of the valve to close could result in a small break LOCA. This accident to bounded by the analysts presented in Cohpter 15 of the FSAR.

'St syste. 89234.8 6CM72F8 200 200 Valves are closed to provide 51 pump train Adjusted torque switch settings

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sepa ra t ion. Two valves are present, ___ ._

f atture of one valve to close vitt not osanged torque switch spring pack preclude achieving separation.

• 8eron injection 8801 Ag 4CM88FN 2750 0 Valves are designed to open to perfore Tank tsotation their safety function. Failure to close Adjustedtorqueswtchsettings)

Changed gear tatto Unikledy would delay returning systes to norest fg,gg kg hQ ggg

@ valve Itne-up. O ce

+4 aron injection 880)A.8 4CM38FN 2750 0 Valves are designeJ to open to perfore Adjusted torque switch settlags Tank teotation their saf ety function. Fatture to close ".'; - - - ' -

r turntag systee to normat .

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