ML20154S840

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NRC Update Meeting South Texas Bmi Flux Thimble Wear
ML20154S840
Person / Time
Site: South Texas STP Nuclear Operating Company icon.png
Issue date: 08/10/1988
From: Galembush J
WESTINGHOUSE ELECTRIC COMPANY, DIV OF CBS CORP.
To:
Shared Package
ML19297H039 List:
References
WCAP-11964, NUDOCS 8810050174
Download: ML20154S840 (30)
v • d • e


Text

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WESTINGHOUSE CLASS 3 o

WCAP-11964 NRC UPDATE MEETING SOUTH TEXAS BMI FLUX THIMBLE WEAR AUGUST 10 1988 J. S. GALEMBUSH RCS COMPONENTS LICENSING I

WORK PERFORMED UNDER SHOP ORDER TGXH 12218 I

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WESTINGHOUSE ELECTRIC CORPORATION

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NRC UPDATE MEETING south TEXAS BMI FLUX IHIMBLE WEAR AuousT 10, 1988 i

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i AGENDA o

SUMMARY

OF THE MAY 17 HL&P/W/NRC MEETING

o CURRENT WESTINGHOUSE 14' CORE PLANT STATUS o OVERVIEW AND PRELIMINARY CONCLUSIONS OF Mol

. Nor CEtt EXAMINATIONS o SUNMARY OF THE WAt.TZ MILL TESTS WITH FLOW LIMITERS t

o UPDATE ON FRENCH 14' CORE OPERATING PLANTS 1

l o south TEXAS UNIT 1 AND 2 PLANNED ACTIONS i

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SUMMARY

OF THE MAY 17TH MEETING B,C,e -

o EDDY CURRENT INSPECTION IS CONSERVATIVE IN MEASURING WEAR o USE OF A LINEAR WEAR RATE IS A VALID TECHNIQUE FOR PREDICT %NG THIMBLE WEAR

- o SOUTH TEXAS UNIT 1 WILL CONTINUE To OPERATE SAFELY BY FoLLOWING THE PREVIOUSLY IMPLEMENTED PLANT THE NEXT ECT OF THE FLUX THIMBLES SHALL

BE CONDUCTED AFTER AN ADDITroNAL 16 WEEKS OF 4 PUMP FLOW, OR SOONER IF A LONG EN0 UGH OUTAGE Occurs o RESULTs OF THE MOL Hor CELL EXAM SHALL BE PRESENTED TO THE NRC j

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SUMARY OF OPERATIGNAL EXPERIENCE WITH FLOW LIMITERS south TEXAS UNIT 1 8 , C i e, l

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  • INDICATES THIMBLES THAT HAVE WEAR AT THE FLOW LIMITER ANo OTHER ELEVArroNs l 4

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CURRENT PLANT STATUS - 14' CORE PLANTS

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TIHANGE 3 OPERATING PLAN

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CURRENT PLANT STATUS - south TEXAS UNIT 1 8 Cst a l

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THIMBLE INSPECTION INTERVAL

, CoNSERVATISMS IN REPORTED THIMBLE WALL LOSS

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o WITH LARGE WEAR SCARS ECT IS CONSERVATIVE 4

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o CONSERVATIVE WEAR SCAR ASSUMPTION FOR CALIBRATION OF ECT CONSERVATISM CONFIRMED BY Hor CELL EXAM 0F TIHANGE THIMBLE SAMPLES o WEAR RATE CAN BE SHOWN To DECREASE WITH TIME

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LARGER WEAR SURFACE ,

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Hor CELL EXAMINATION OF TIHANGE 3 SAMPLES (MoL, BELGIAN CENTER FoR NUCLEAR STUDIES)

SCHEDULE o hot CELL WORK COMMENCED 6/30/88 o PRELIMINARY VISUAL EXAMS COMPLETED 7/1/88 o FLOW LIMITER SPRING RATE TESTS COMPLETED 7/1/88 o FLOW LIMITER OVERALL HEIGHT MEASUREMENTS COMPLETED 7/6/88 o FINAL REPORT DUE FROM MoL BY SEPTEMBER 30, 1988 11 s

HOT CELL EXAMINATION OF TIHANGE 3 SAMPLES (MoL, BELGIAN CENTER FOR NUCLEAR STUDIES)

PRELIMINARY OBSERVATIONS (CONTINUED):

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Hor CELL EXAMINATION OF TIHANGE 3 SAMPLES (MoL, BELGIAN CENTER foR NUCLEAR STUDIES)

PRELIMINARY OsSERVATIoNS:

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hot CELL EXAMINATION OF TIHANGE 3 SAMPLES (Mot, BELGIAN CENTER FOR NUCLEAR STUDIES) r PRELIMINARY OBSERVATIONS: (CONTINUED) a ,c .e .

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. 0 OVERALL HEIGHT OF 4 Flow LIMITERS MEASURED 8 Cie ,

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Hor CELL EXAMINATION OF TIHANGE 3 SAMPLES (NoL, BELGIAN CENTER FoR NUCLEAR STUDIES)  !

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PRELIMINARY CONCLUSIONS
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! o FLOW LIMITER PERMANENT SET OR SHORTENING IS l' ATTRInuTEo To:

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CORE LOCATION F. L. OvEnALL HEIGHT Bor. Nozzle HGT bot. NOZZLE HGT (AFTER 1 CYCLE)

HEIGHT CHANGE DuE To WEAR

. F. L. OVERALL HEIGHT (AFTER 1 CYCLE)

OvERALL HGT CNG i HEIGHT CHANh2 Nor Dur To WEAR 4

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WALTZ MILL FULL FLOW TEST

SUMMARY

JUNE 1988 CONFIGURATIONS TEsTro 8, C ,e ,

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WALTZ-MILL FULL FLOW TEST

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WALTZ MILL FULL FLOW Test

SUMMARY

JUNE 1988 ltlleL1 ?!9miflWI Vff4K,f A PL8W LWUTtt 8,C ,e _

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WALTZ MILL FULL FLOW TEST

SUMMARY

RESULTs AND CONCLUSIONS i

CORRECTIVE MEASURES ASSESSMENT a ,c ,6 -

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l WALTZ MILL FULL FLOW TEST SUW4ARY RESULTS AND CONCLUSIONS 4

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SUMMARY

OF RECENT FRENCH 14' CORE PLANT OPERATING EXPERIENCE SEVERAL FRENCH PLANTS HAVE NoW OPERATED WITH CORRECTIVE HARDWARE FOR ONE OR MoRE CYCLES. RESULTS FROM THESE PLANTS ARE SUMMARIZED BELOW. a,c.e l

THIMBLE SIZE SLEEVE SIZE t .

!. SPRING CAP WEAR OEPTH*

< .004

.004 .006"
.008 .012"

.012- 016" l .016 .020" i

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  • WEAR DEPTH AFTER ONE CYCLE Or OPERATION l

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l CONCLUSIONS FROM THE JUNE 24 FOUR PARTY MEETING i (WESTINGHOUSE /fRAMATOME/ EOF /CEA) a,c.e -

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end Imp 23 O

south TEXAS UNIT 1 SHORT TERM ACTIONS o DURING THE UPCOMING OUTAGE IN SEPTEMBER; 4.C e -

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! O BASED ON INSPECTION RESULTs: NExT INSPECTION INTERVAL WILL BE DETERMINED.

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SOUTH TEXAS UNIT 1 LONG TERM ACTIONS

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J O DURING FIRST REFUELING 1

OUTAGE; 6

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south TEXAS UNIT 2 PLANNED AcTroNS 1

prion To Cone LOADING; INSTALL MANUAL THIMBLE ISOLATION VALVES 8 Cie ,

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I BAsrs FOR THE SOUTH TEXAS Actron PLAN

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