ML20077J918
| ML20077J918 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 07/31/1991 |
| From: | William Cahill, Walker R TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| CP-90-08, CP-90-8, TXX-91275, NUDOCS 9108050245 | |
| Download: ML20077J918 (8) | |
Text
'.
._- Eg Log # TXX-91275
~_
Fi1e # 906.3
.r C
910.4 7tlELEC7RlC Ref.#$F50.55(e)
Willisen J. Cahut. Jr.
ti,c u., ru, nuac."
July 31, 1991 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D.C.
20555
SUBJECT:
COMANCllE PLAK STEAH ELECTRIC STATION (CPSES) - UNIT 2 DOCKET NO. 50 446 VOLUME CONTROL TANK ISOLATION VALVE LEAKAGE SDAR CP 90 08 (FINAL REPORT)
Gentlemen:
On necember 5, 1990, TV Electric orally notified the NRC of a deficiency in which solenoid operated isolation valves leaked excessively in the back-flow direction and would not isolate the gas space of the volume control tank from the centrifugal charging pump suction during the injection phase of a loss of Coolant Accident.
The last report for Unit 2, logged TXX 91104, dated March 6, 1991, committed to submit a supplemental report describing the final modification selected.
Evaluation of several proposed modifications has resulted in a decision to replace the existing valves with new valves which are capable of isolating flow in both directions.
This modification will be completed prior to Unit 2 fuel load.
Sincerely.
)
William J. Cahill, Jr.
R. g B y :..
D. Walter Manager of Nuclear Licensing JLR/fds c - Mr. R. D. Martin, Region IV Resident inspectors, CPSES (2)
Mr. H. D. Fields NRR Wola'dr:I45 c i cn 31 PDR ADOCb OD00M 46 FDR 400 North Obve Street LB ki Dallas. Texas 75201 g
pLb BY SUBJEC1 Q2fkETED W. G. Ccansil 19BT H. D. Bruner E21~
J. Ellis (CASE) (FC)
H. D. Spence / 31ST H. D. Bever TB01 J. F. Streeter P -C7:Redican J. L. Vota (TC)
W. J. Cahill E22 (NODit):C07A N. S. Reynolds (FC)
C. B. Hogg E01 F. Johnson (FC)
R. D. Walker / 24F 1pA3 J. S. Marshall J. W. Huffett C078 C. B. Corbin ST24 J. E. Krechting 24ST R. D. Calder C29 INPO (FC)
G. Bynod (FC)
R. A. Wooldridge 32BT A. B. Scott 010 R. H. Fillmore 32BT J. J. Kelley 009 (PSES IR & RESPONSES J. L. French RT1 H. R. Blevins 009 Jz:Audas'C21-R. L. Ramsey 16BT P. B. Stevens 006
.J4LSmith 011-J.uFa HcMahon:701c.
0-,=Hayn e rd = ( I Rs; Only )= LEI )
H. C. Schmidt 24ST M2it.;Sagateus01-T. A. Hope 006 TXX File (Corp.) ST24 CCS E06 TXX File (Site) CL1 AT-Hus ain--24 SL -
TXX File (Bethesda) (FC)
OTHER
- 0. A n Woodlan=24:ST
.Cn E.;Jensen (ORC).3724 W. G. Guldemond CLI S. S. Palmer E24 R. P. Baker CL1 (Stippletion Related)
J. C. Hicks / C07 Ti C e,.4 cp(
C. Rau VENDOR C'
Su D.-Hannn~~F44--
C; L.1 Terry _rA08.
07:H;:HcAfee/:A08.
Rs;C77Byrd J2 Lw 8arke M ISEG);A08-O e4,--De v i s-410E R)~A08 gy:DrEdwardtrf4SL (FC) - First Class Mail NODIL -
Correspondence related to material / component acceptability.
10ER -
Correspondence which pertains to 10ER program (e.g.
generic letters, NRC information notices. NRC bulletins, etc.) and CPSES Inspection Reports.
CASE -
All filings and correspondence between the NRC staff and TV Electric.-
ORC -
All SDAR's. LER's. CPSES Inspection Reports and responses. NRC Bulletins and responses and Generic Letters and responses, and description letters for changes to licensing bases documents.
ISEG -
All !OER material plus inspection reports for TU Electric and other plants.
VENDOR -
Vendor documents per STA 206 (Vendor Document Group or VETIP Coordinator)
June 19, 1991
File No. : 10002 COMM11MLNi 1 RACKING Page No. :
1 OUiGOING CORRESPONDENCE EVALUATION S11001 DOCllMlNI IDLNTilICATION Titic/ Subject : VCT ISOLATION VALVE LEAV. AGE SDAR: CP 90 08 LER 90 035 Loo No.
TXX 91275 file
- 906.3 910.4 Date
- 07/31/1991 ITEM TRACKING l
1 racking Description Document /No.
[,
s '.,
The existing solenoid operated valvel($0lV) for LS 1991 044 the Volume Control Tank will be replaced with new item Types * : lA valves which are capable of isolating flow in both Assigned 10 : CN5T/STAf directions to prevent excessive leakage in the Due Unit 1 back flow direction and provide isolation f rom Due Unit 2
- 12/01/92 C the centrifugal charging pump suction during the Affected Unit (s) : NN2 injection phase of a LOCA.
Status : OPN j
l Item Types I: A - External Action On ope r M i on a l hei:
DH le i n Uni' 9
IA-Internal Action DO Description Univ C - Committed Date l'
- Proposmi Date COMPLETED BY :
REVIEWED BY :
7/dr/b 33f1L Initials JLR Date Initials _
Date
+
dVEUED DY: jlr REPORT DATE. 07/24/91 COMMITMENT DATA INPUT FORM PAGE : 1 COMMITHENT INDEX INFORMA110N COMMITHENT TYPE : REG NUMBER : 25533 AUTHOR 11Y : NRC COMMITMENT REGISTER I4 UMBER : LS-1991 044 UNITS
- NN2 STATUS 1X : NA STATUS 2X : OPN COMMITMENT ST ATUS : OPN DELETION CODE Ti1LE
- POTENTIAL COMMON MODE FAILURE OF (CVCS) PUMPS (SDAR-CP-90 08)
SUBJECT IB VC DM C0 VA LIC CONTACT : JLR PRIM ORG CNST/STAF UNIT 1 MILES 10NE :
DUE DATE :
SCHEDULE DATE :
UNIT 2 - MILESTONE : A DVE DATE :
SCHEDULE DATE :
INFO VERIFIED :
DATE VERIFIED :
PRIORITY
- 01 LDCR : LDCR-COMMITMENT DESCRIPT10ti :
The existing solenoid operated valve (50ly) for the Volume Control Tank will be replaced with new valves which are capable of isolating flow in both directions to prevent excessive leakage in the back-flow direction and provide isolation from the centrifugal charging pump suction during the injection phase of a LOCA, SOURCE DOCUMENT STATUS INFORMATION SOURCE DOCUMENT ISSUE TYPE LEVEL NUMBER SECTION PAGE REV DATE LTR 1 TXX-91275 07-31 91 LTR 0 TXX-90 000365 11 13 90 IER 0 LER 90 035-00 11-13 90 SDAR 0 SDAR-CP 90 008 LT R 0 TXX-91 000104 03 06 91 ACTIVITY SUB ITEMS SUB ITEM CONTRIB ORG LEAD INITIATION DATE RE0*D COMP DATE 001 CNST/STAF 07 11-91 002 2ENG/ME 03-05-91 COMMITMENT COMMENTS 50!V's 2-HV-8220 2 HV 8221 H a n f - V Al.COR Model-V526-5295-53 BRP is Sht-CA, Rev. CP" Tort THIS MOD;FICATION IS TO DE COMPLETED PRIOR 10 FUEL LOAD.
COMMITMENT DOCUMENT CROSS REFERENCE !!1 FORMAT 10N KIND TYPE NUMBER COMM REG 25339
4 -
COMM11HENT DAT A INPUT FORM PAGE : 2 COMMITHENT TYPE : REG NVHBER : 25533 AUTHORITY : HRC CONHITHENT REGISTER NUMBER : LS-1991 044 00MH RLG 25545 i
ASSOCIATED COMMITHENT INFORMATION
-ASSOC STATUS TYPE NVHBER
~
REVIEWER DATE CTG ENTRY DATE l
1 L
b I
f 4
f
- -, ~,-
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,-,_.4
~.-....r.-....._..m._~..__.__.__._.m_....-_._____..,_...m_
NOCLEAR LICENSING DEPAR1 MENT File # 10003 DOCUMENT If0RK SHEET ACL NO.90-233 DOCUMENT INOFNTIFICATION:
Title / Subject _VCT isolation Valve Leakaae Log No.
TSL 90206 File No. 10110. 906.3 SDAih.gP 90-008 Ref. No. 90 008 UNIT: 2 Date Wp.5/M
.............e.......................s................
ACTION ASSIG MLDT:
Licensing Lead (Name)
JLR Due to TNL 12/10/M Technical lead ;0rg.),_2ENG/ME Due by TNL DJ/ W 21 Cognizant Eng. (Site)
TLH COMMITTED:
Y Description 1!ai.LLgalkdown~ due to IN 90 64 confirmed that Valco solenoid operated j
isolation valves in ti(e CCPS suction isloation Dioina vent lines would not isolate from the VCT to the suction oumos.
Initials CBC Date 12/13/ M
- Logged CAT: SDAR ACTION TAKEN:
Review / Working
. Tracking System Updates (s)
Comments Log WQ.
Dated Due to TNL Due by TNL M e.a, p u
ola n,,_Lj g j oj al n /a i
%Isto t 'dL-b d M d w ( O M.W L T p V 9 0 C % y y tj T-[t3 d//c$/M' , _j._j_ h:QU %t % N j /- J. J- ,. l. /- ,. l. l - ,. J-.J.-- FINAL STATUS: --[ Closed Other Outgoing Correspondence. Log No. 7X4-9m f Date 2./3J/3) Description k wUMtd m uMA k m-kn.,0 dn r e A m _ v b u M e \\l C T
- hem hki9 u.doox AL e MvM A th<1 nu ndtM CNnota vdr0A uN h da evodk tw uA81[ A ddN M ti;e1 m Initials M DaIe d h 2_f k
APPROVAL: Initials 'I Date N I --- Logged ~
File flo.10001 00l(RI SPONDl HCC SIGN-OlT COPY TO PIMS I Sheet _f. of.3-OUTGOING LOG N0: TXX 91275 LETTLP FILE NO: 900.3 910.4 DATE OF LETTER: 07/31/1991 UNIT / CLASSIFICATION: -tFStart, CPSES 2,1stp49ML TITLE /
SUBJECT:
VCT ISOLATION VALVE LEAKAGE SDAR: CP-90 08 LER 90 035 ATTACHMENTS: COMMITHENT EVALVATION SHEET, %TTACMMEliT.S', C#CLUSUfte!,, ytfGfftf?te*t 'PLEASE HAND CARRY TO NEXT PERSON FOR SIGNATURE' RETURN TO ORIGINA10lt ilY 3EL Q$$ 0 FUNCTION PERSON SIGNATURE i DATE CORRECTIONS / COMMENTS i A l k.O MC
- TH L / E S(ORI G!tl ATOR)
JLR diTI x EC,,_ %. Ab W Q_ YM}}l 11 Kwg h ALQ COGNIZANT MANAGER gg fg , VICE-PRESIDLNT Qgg })h-PR00f READER / ~ MGR, TNL/ES (LAST) INCOMING LOG N0: ACL NO: 90 P;3 NOTARY RE0'D: @NO _ _ L(,;-{C~.90- C[ 1Ettropy in A F,[ U f 1 [ ' T{Ct10 APPLICABLE RLrEPENCES/NRC pncontrait. i 0-bk AT Tec unr ni / t tit to,unt : 9,40 vdtEqyttu td d_ LICENSil1G FLE RE0'li: $ NO _.__.__.__mdl i AL, a,A p T.Y s COMMENTS: d FOLLOW UP SUBMITTAL: MNO Ub +[f,b%h7vM.'+hdu4y d( $\\1-Syl3 ./ NEW ACL NO: NEO 4.01
P00'30ed ggitt 16. OC int N . ;4i ci,3E.001 File No. 10002 CORRESPONDENCE SIGN OFF COPY TO PINS Sheet L of & OUTGOING LOG NO: TXX 91275 LETTER FILE N0: 906.3 910.4 OATE OF LETTER: 07/31/1991 UNIT /CL ASS!FICATION: Semest. CPSES 2, M TITLE /
SUBJECT:
VCT ISOLATION VALVE LEAKAGE SDAR: CP 90 06 LER 90 036 ATTACHHENTS: CCriH!THENT EVALVAT!ON SHEET xtTJEEAG5', numsasunamt.,gggggguesest 'PLEASE HAND CARRY TO NEXT PERSON FOR SIGNATURE' RElllRN TO ORIGINATOR BY N O.A3; \\99k O FUNCTION PERSON SIGNATURE D AT E CORRECTIONS / COMMENTS i m. TNL/ES(ORIGINATOR) JLR M WM'W 'JTC. _- AM~ Nl Rus hPAQ ?h, fit ~ COGN!ZANT MANAGER gg VICE PRESIDENT g LEGAL ~ PROOF READER ~ ~ NGR, TNL/ES (LAST) 0 -1M NOTARY RE0'D 1lpfNO INCOMING LOG N0: ACL NO: APPLICABLE REFERENCES /NRC DOCUMENTS: /M O TEl.ECOPY T(' AGENCIES: @ NO T 90 -b k ATTACHHENT/ ENCLOSURE: @NO LICENSING FEE RE0*D: @0 Nb bL gyd-N y dd FOLLOW UP SUBMITTAL: 2R(NO j COMMENTS NEW ACL NO:
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