ML20245F247

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Nonproprietary, NRC Update Meeting South Texas Bmi Flux Thimble Wear,881201
ML20245F247
Person / Time
Site: South Texas STP Nuclear Operating Company icon.png
Issue date: 12/01/1988
From:
WESTINGHOUSE ELECTRIC COMPANY, DIV OF CBS CORP.
To:
Shared Package
ML19297H609 List:
References
WCAP-12165, NUDOCS 8905020310
Download: ML20245F247 (43)
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i lj i' .f... 'j i nN 'l NRC UPDATE MEETING i SOUTH. TEXAS BMI. 1 ftUX THIMBLE WEAR l DECEMBER'1, 1988 D i i I l i u .a '1 i WORK PERFORMED bNDER SHOP ORDER TGXM-12218 i !l 1 WESTINGHOUSE ELECTRIC CORPORATION i POWER SYSTEMS BUSINESS UNIT P. O BOX 355 PITTSBURGH,PA 15230-0355 i 8905020310 990423 PDR ADDCK 0%D4'?9 b o PN7 8

lS.0/[ 12/1/88 4 0, './ 1 1 i . :q 4 4 .J a J ) HRC UPDATE MEETING l south TEXAS BMI Flux THIMBLE WEAR PLAN i DEcrusan-1, 1988 J I e l 1 e i i j l i

I. \\ ~ tuuss - 1 1 INTRODUCTION 4

THE. PURPOSE!Or THIs NEETINa Is To;-

i j REVzrw THE HISTORY Or THE THIMnLE WEAN Issue AT SOUTH o ~ TEXAS '\\ PRESENT THE RESULTs OF THE MocT RECENT south TEXAS ~ o 1 THIMBLE INSPECTION ) 1 Discuss THE PLAN FoR OPERATION Or south TEXAS UNIT-1 o UNTIL THE NEXT THIMBLE INSPECTION i 4 h 'I

1 12/1/88-l AGENDA o

SUMMARY

or PREVIOUS HEETINGS 1 o ACTIVITIES SINCE THE AUGUST HEETING VALVE INSTALLATION 1 BALL CHECK VALVE TESTING WOG PROGRAM THE EDDY CURRENT INSPECTION TECHNIQUE o

SUMMARY

AND DETAILS Or LAST Flux THIMBLE INSPECTION o FUTURE ACTRON PLAN foR SOUTH TEXAS o south TEXAS UNIT 1 SOUTH TEXAS UNIT 2 S 2

4 l l J 12/1/8B ) PREVIOUS BMI MEETINGS I DECEMBER 14, 1987 1 REVIEW OF TIHANGE 3 RESULTS WITH FLOW LIMITERS o INSTALLED I ~ l COMPARISON OF SOUTH TEXAS UNIT 1 AND TIHANGE 3 0 ESTABLISH SOUTH TEXAS OPERATING PLAN 0 ESTABLISH EDDY CURRENT BASELINE I 1 INSPECT THIMBLES ON A REGULAR BASIS REPOSITION / CAP YHIMBLES AS NECESSARY ESTABLISH ISOLATION PROCEDURES 1

6 11/1/88 3 PREVIOUS BMI NEETINGS MAY 17,19[c,{ i o REVIEW THE FIRsr SET OF Post-OPERATION THIMBLE i INSPECTION RESULTS o REVIEW SHORT TERM ACTION PLAN l l a,c,e j i ~ o REVIEW LONG TERM OPERATING PLAN a,c.e Giu 4 I

12/1/8B PREVIOUS BMI HEETINGS AUGUST 10, 1988 l l 1 PRELIMINARY CONCLUSIONS FRoM hot CELL EXAMINATION OF o TINANGE 3 Flow LIMITERS AND WORN THIMBLE SAMPLES a,c,. a,c,. l 1 OVERVIEW OF WESTINGHOUSE THIMsLE Flow /VIsRATION TE o (WALTZ HILL) l a,c.. l M e

12/1/88 PREVIOUS BMI MEETINGS August 10, 1988 - CONTINUED 0 UPDATE ON OPERATING PLANTS IN EUROPE n,c.* SOUTH TEXAS UNIT 1 PLANNED ACTIONS PnIoR To OPERATION o a,c,. l

q - 1 l 12/1/88 Previous BMI MEETINGS j AucuST 10, 1988 - collTINuED l ( o south TEXAS UNIT 2 PLANNED ACTIONS 1 l INSTALL MANUAL THIMBLE ISOLATION VALVES ) ) INSTALL MAGNETIC BALL CHECK VALVES 3 a, c, =, m e l 7

~ l 12/1/88 ACTIONS SINCE AUGUST o INSTALLATION Or ISoLATron VALVES MANUAL ISoLATZoN VALVES WERE INSTALLED AT SouTu TEXAS UNIT 1 DuaING THE' SEPTEMBER /0CrosER' OUTAGE o MAGNETIC BALL CHECK VALVE TEsr 3, C, 8, i j .] l 1 1 1 e 1

I V ~ 12/1/88 WESTINGHOUSE OWNER's GROUP (WOG) - PROGRAM a IN OCTOBER THE OWNER's GROUP APPROVED A PROGRAM ON BMI THIMBLE WEAR 1 PROGRAM OBJECTIVE; ESTABLISH PLANT CRITERIA FoR MEASURING, PREDICTING, AND o DEALING WITH BMI THIMBLE TUBE. WEAR To ASSIST MEMBER UTILITIES IN MEETING 88-09 REcuzREMENTS To PREVENT FORCED OUTAGES OUE To THIMBLE LEAKS 9 v,

12/1/8B THE EDDY CURRENT INSPECTION TECHNIQUE Flux THIMBLE INSPECTIONS ARE PERFORMED USING THE EDDY C TECHNIQUE THE EDDY CURRENT SIGNAL INDICATES THE VOLUME OF HATERIAL LOST USE OF A CALIBRATION STANDARD CONVERTS FRoM VOLUME MATERIAL LOST To WALL LOSS (DEPTH) { A CONSERVATIVE 900 SCAR FOR VOLUME REM 0/AL WAS ASSuMEo FoR THE SOUTH TEXAS INSPECTIONS a,c. 1 l i e \\ 10 l

12h>8B l .E. C. T. vs. ACTUAL WEAR DEPTH TIHANGE THIMBLE D-5 o A DETAILEo HETALLosnAPHIc hot CELL EXAMINATION WAS PEnronMEo ON WORN THIMBLES FaoM TINANGE 3 e,c,. ^ 1 l Si l Il

12/1/88 1 BMI Flux THIMBLE INSPECTION.RESULTS l south TEXAS UNIT 1 THREE ECT Flux THIMBLE INSPECTIONS HAVE BEEN PERFORMED To DATE; l DECEMsER 1987 - BASELINE INSPECTION, 4 WEEKS 1 MAY 1988 - 16 WEExs TOTAL 3 on 4 PUMP Flow i SEPTEMBER 1988 - 32 WEExs TOTAL 3 OR.4 PUMP Flow I o i 0 12

i 12/1/88 BMI FLUX THIMBLE INSPECTION-RESULTS SOUTH TEXA5 UNIT 1 I 1 So Co.e ~ t l l 1 i l j W I l 13 w-_-.-_-_...--_-_.

.12/1/88 COMPARISON OF SOUTH Texas AND TIHANGE DATA n,c.e D-a Q 2 i kl .J Q 2 ~ O 4 i k W Q-e i j l M l l l ~ 14' j .l i I

i 12/1/88' BMI Flux THIMBLE INSPECTION RESULTS (- SOUTH TEXAS UNIT 1 WALL LOSS ON REPOSITIONED THIMBLES a,c,. ? I i I l i l 0 15

i l 1t/1/88 ACTION PLAN FOR SOUTH TEXAS UNIT 1 UNIT 1 IS SCHEDULED Fon AN OUTAGE IN LATE FEBRUARY THE 3 on 4 PUMP Flow TIME UNTIL Tuls OUTAGE WILL BE o l APPROXIMATELY 21 WEExs.AT THE TIME OF THE OUTAGE Soc,e i O s 1 W 16

12/1/88 TAsLE OF PREDICTED THIMsLE WEAR a,c,e ^ i i 1 3 e i e ] 17

4 11/1/88 FUTURE ACTION PLAN FoR south TEXAS UNIT 2 l PRIOR To OPERATION; o INSTALL MANUAL ISOLATION VALVF.S a,e,. j o I o 1 BEFORE THE FIRST REFUELING OUTAGE AT UNIT 1; I a,c e 1 o PERFORM EDDY CURRENT INSPECTION OF.. THIMBLES At UNIT 2 l l 6 l I 19

i .O 11/1/88 ACTION PLAN. Fon SOUTH' TEXAS UNIT l' (CONT.) l '"sTIFICATION Fon 21 WEEK OPERATION THE EDDY CURRENT INSPECTION TECHNIQUE,IS INHERENTLY l Conservative MOL Hor CELL EXAMINATION Snows scans AFFECT 3600 o AS OPPOSED To THE 900 ASSUMED Fon ECT CALIBRATION-i n v,e o 7 o 1 a WEAR RATCS WILL DECREASE WITH TIME a,c,e

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WESTINGHOUSE CLASS 3 4, WCAP-12165 ? .l.. NRC UPDATE MEETING s SOUTH TEXAS BMI FLUX THIMBLE WEAR DECEMBER 1, 1988 s e WORK PERFORMED UNDER SHOP ORDER TGXM-12218 WESTINGHOUSE ELECTRIC CORPORATION POWER SYSTEMS BUSINESS UNIT P. O. B0X 355 PITTSBURGH,PA 15230-0355 ,~ i

12/1/88 NRC UPDATE MEETING south TEXAS BMI FLUX THIMBLE WEAR PLAN DECEMBER 1, 1988 i G l O

k 12/1/88 INTRODUCTION THE PURPOSE OF THIs MEETING Is To; o REVIEW THE HISTORY OF THE THIMBLE WEAR ISSUE AT south TEXAS o PRESENT THE RESULTs OF THE MOsT RECENT SOUTH TEXAS UNIT 1 THIMBLE INSPECTION o Discuss THE PLAN FOR OPERATION OF SOUTH TEXAS UNIT 1 UNTIL THE NEXT THIMBLE INSPECTION I e

I I 12/1/88 AGENDA o

SUMMARY

OF PREVIollS MEETINGS o ACTIVITIES SINCE THE August MEETING VALVE INSTALLATION BALL CHECK VALVE TESTING WOG PROGRAM o THE EDDY CURRENT INSPECTION TECHNIoUE o

SUMMARY

AND DETAILS OF LAST Flux THIMBLE INSPECTION l 0 FUTURE ACTRON PLAN FOR SOUTH TEXAS l SOUTH TEXAS UNIT 1 SOUTH TEXAS UNIT 2 2 i

l t l l ( umas PREVIOUS BMI MEETINGS DECEMBER 14, 1987 o REVIEW OF TIHANGE 3 RESULTS WITH Flow LIMITERS INSTALLED o COMPARISON OF SOUTH TEXAS UNIT 1 AND IIHANGE 3 o ESTABLISH SOUTH TEXAS OPERATING PLAN ESTABLISH EDDY CURRENT BASELINE INSPECT THIMBLES ON A REGULAR BASIS REPOSITION / CAP THIMBLES AS NECESSARY l ESTABLISH ISOLATION PROCEDURES 1 f

1 12/1/88 l l PREVIOUS. BlIII MEETINGS l l MAY 17, 1988 o REVIEW THE FIR $T SET OF Port-OPEitATION THIMELE InsPzcTION RESULTS o REVIEW SHORT TEnM ACTION PLAN 1 a c.e 0 REVIEW LONG TERM OPERATING PLAN .,c,. e

} } l 12/1/88 i PREVIOUS BMI MEETINGS AvauST 10, 1988 1 o PRELIMINARY CONCLUSIONS Fnos hot CELL EXAMINATION OF TIHANGE 3 Flow LIMITErtS Af*O WORN THXMBLE SAMPLLS a,c.e n n,c.e OVERVIEW 0F WESTINGN01)SE THIhBLE Flow / VIBRATION TESTS o (WALTZ MILL) e,c.e c nm

I L i 12/1/88-l PREvrous BMI MEETINGS AuaesT 10, 1988 - CONTINUED o UPDATE ON OPERATINK PLANTS IN EUROPE a,e,e I o SOUTH TEXAS UNIT 1 PLANNED ACTIONS PRIOR To OPERAT10N 4,c,. l

12/1/88 P.tEvz005 BMI' MEETINGS AucuST 10, 1938 - CONTINUED 1 o SOUTH TEXAS UNIT 2 PLANNED ACTIONS INSTALL flANUAL THIMBLE ISOLATION VALVES INS'/ALL MAGNETIC BALL CHECK VALVES ttoCat L. d 7

I. [ l 12/1/88 ACTIONS SINCE AUGUST o INSTALLATION OF ISOLATION VALVES l MANUAL ISOLATION VALVES WERE INSTALLED AT SOUTH TEXAS UNIT 1 DURING THE SEPTEMBER /0CTOBER OUTAGE o MAGNETIC BALL CHECK VALVE TEST .,c.e l l 1 i l

l 12/1/88 WESTINGHOUSE OWNER'S GROUP (WOG) PROGRAM IN OCTOBER THE OWNER'S GROUP APPROVED A PROGRAM ON BMI THIMBLE WEAR I PROGRAM OBJECTIVE; O ESTABLISH PLANT CRITERIA FOR MEASURING, PREDICTING, AND DEALING WITH BMI THIMBLE TUBE WEAR To ASSIST MEMBER UTILITIES IN MEETING 88-09 REQUIREMENTS To PREVENT FORCED OUTAGES DUE To THIMBLE LEAKS l 9 e

l 12/1/88 THE EDDY CURRENT INSPECTION TECHNIQUE FLUX THIMBLE INSPECTIONS ARE PERFORMED USING THE EDDY CURRENT TECHNIQUE 1 THE EDDY CURRENT SIGNAL INDICATES THE VOLUME OF MATERIAL LOST USE OF A CALIBRATION STAftDARD CONVERTS FROM VOLUME OF MATERIAL LOST To WALL LOSS (DEPTH) A CONSERVATIVE 900 SCAR FoR VOLUME REMOVAL WAS ASSUMED FoR THE SOUTH TEXAS INSPECTIONS a,c.e 10

1 120./88 E. C. T. vs. ACTUAL WEAR DEPTH TIHANGE THIMBLE D-5 o A DETAILED METALLOGRAPHIc hot CELL EXAMINATION WAS PERFORMED ON WORN THIMBLES FROM TIHANGE 3 a,c.e 1 l W 11 1

1 12/1/88 BMI Flux THIMBLE INSPECTION RESULTS SOUTH TEXAS UNIT 1 THREE ECT FLUX THIMBLE INSPECTIONS HAVE BEEN PERFORMED To DATE; DECEMBER 1987 - BASELINE' INSPECTION, 4 WEEKS MAY 1988 - 16 WEEKS TOTAL 3 oR 4 PUMP FLOW SEPTEMBER 1988 - 32 WEEKS TOTAL 3 OR 4 PUMP FLOW 12

l 12/1/88 BMI Flux THIMBLE INSPECTION RESULTS SOUTH TEXAS UNIT 1 a,c.e 'm 13 m --- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - " - - - - - ^ - - - - ~ ~

1 i 12/1/88 COMPARISON OF SOUTH TEXAS AND TIHANGE DATA DrCet a w Q 0 Ya S- >= 0 t W Q ?: 2 W 14

g 12/1/88 BMI FLUX THIMBLE INSPECTION RESULTS SOUTH TEXAS UNIT 1 WALL LOSS ON REPOSITIONED THIMBLES a,c.e i 0 ~ 15

i 12/1/8B ACTION PLAN FoR SOUTH' TEXAS UNIT 1 UNIT 1 IS SCHEDULED FOR AN OUTAGE IN LATE FEBRUARY o THE 3 oR 4 PUMP FLOW IIME UNTIL THIs OUTAGE WILL BE APPROXIMATELY 21 WEEKS AT THE TIME OF THE OUTAGE e,c,e O O m 16

12/1/88 TABLE OF PREDICTED THIMBLE WEAR a,c,e aas W 48 17

1 12/1/88 1 FUTURE ACTION PLAN FoR SOUTH TEXAS UNIT 2 PRIOR To OPERATION; o INSTALL MANUAL ISOLATION VALVES a,c,e 0 0 BEFORE THE FIRST REFUELING OUTAGE AT UNIT 1; e,C,8 o PERFORM EDDY CURRENT INSPECTION OF THIMBLES Ar UNIT 2 ~

i 12/1/88 ACTION PLAN FOR SOUTH TEXAS UNIT 1 (CONT.) l JUSTIFICATION FOR 21 UEEK OPERATION THE EDDY CURRENT INSPECTION TECHNICU6,IS INHERENTLY CONSERVATIVE O MOL HOT CELL EXAMINATION SHOWS SCARS AFFECT 3600 AS l OPPOSED TO THE 900 ASsuMEo FOR F.CT CALIBRATION e,c,e o ~ a WEAR RATES WILL DECREASE WITH TIME ..,c,. ~ .}}

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