ML19312D579

Summary of PWR Pipe Crack Study Group 800205 Meeting Re Collection of Foreign Experience Data by Lll & Progress of Subtask Efforts

ML19312D579
Person / Time
Issue date:	03/07/1980
From:	Shao L Office of Nuclear Reactor Regulation
To:	Eisenhut D Office of Nuclear Reactor Regulation
References
NUDOCS 8003250016
Download: ML19312D579 (14)

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UNITED STATES h

n NUCLEAR REGULATORY COMMISSION U

E WASHINGTON, D. C. 20555 k

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MAR 7 1980 MEMORANDUM FOR:

D. G. Eisenhut, Acting Director Division of Operating Reactors FROM:

.L. C. Shao, Chsirman PWR Pipe Crack Study Group

SUMMARY

OF MEETING OF THE PWR PIPE CRACK STUDY GROUP ON FEBRUARY 5,1980 The PWR Pipe Crack Study Group met on February 5, 1980 to discuss the progress and schedule of the study group effort.

The meeting agenda is enclosed and a summary of the major areas is provided below.

The first area discussed by the group was the collection of foreign experience data.

Lawrence Livermore Laboratories (LLL) has been contracted to assist the study group in obtaining and assembling foreign experience data.

The initial effort in obtaining this information will be by a combination of questionnaire and telephone calls.

The second area discussed by the group was the progrest of each of the subtask efforts, see attached agenda.

Tables listing-all of the domestic PWR pipe cracking experience were provided by subtask group 1.

These tables will be integrated with a. table of vital systems, developed by subtask group 2, to' ~ ~ ' ~ ~

establish a priority for evaluating the safety consequences of cracking in PWR plants.

Significant discussion was generated in the meeting about whether to include wcter hammer loads in the mechanistic evaluation of cracking.

Concerns about including water hammer loads arose from the fact that these loads are difficult to quantify and that currently a staff program (task A-1) studying these loads is in progress. A decision was made by the group to include these loads, if definable, in the mechanistic evaluation of systems where historically these loads have occurred.

If necessary additional work in the area will be recom-mended for the long term program.

The remaining subtask, groups reported that their efforts were progressing within the target schedules and that no major problems have been encountered.

The next PCSG meeting to review progress of the subtasks efforts is scheduled for March 5,1980.

Larry C. Shao, Chairman PWR Pipe Crack Study Group cc:

See attached list 8003250016

D. G. Eisenhut RAR 7 1980 H. Denton R.-Minoque S. Levine

-- V. Stello E. Case G. Arlotto

' F. Schroeder T. Murley -

N. Moseley L. Shao S. Hanauer S. Bush W. Hazelton A. Taboada J. Muscara C. Cheng R. '. Gambl e R. Woodruff V. Noonan R. Bosnak J. Burns T. Marsh V.-Pancieria J. R. Buchanan TERA OI&E(3)

R. Fraley, ACRS NRC PDR d

AGENDA I..

Introduction II. Foriegn Experience Review Status III. Sub-Task Group Status Sub-Task 1 - Defining the Cracking Mechanism - W. Hazelton Sub-Task 2 - Significance of Cracking - V. Panciera Sub-Task 3 - Determination Cause of Cracking - R. Gamble Sub-Task 4 - ISI and Leak Detection - C. Cheng Sub-Task 5 - Review ongoing Programs -and Recommended New Programs - J. Muscara

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Sub-Task.6 - Report Organization - S. Bush IV. Technical Discussion V.

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y s-SLPPWtf 0F PWt PIPE CMcKIIE ExCueIns S.G. Festwarte nozzi.s Caacus I PROBABLE CAUSE PUNT SYSTDt E PIPE SIZE DESCRIPT10m 1Etts 4* a,tensas I Centale Serer 2 Vtl mid nAt Ic5CC Llevid E.e4 mesta 3 Vts ueld mAZ ' unestermined f 18 uste heer Pee er Valve j V1bretten I AMil .3 Spent Fuel Peel '1 40 teeld Unseterstned I to held near Pumo ' Vibretten Artenses ! CVCS y g y or nipp!g teeld 7tbretten Caelant Sectrt. 4 EO vent er Orataline unta Vthrotten i CCC5 Seaver Valley 1 (CCS 1 EO vent er Orain Line Weld Vibretten t l CrFstal River 3 Centatnuent Sorey 1 Vt3 tield let! ItsCC Calvert Cliffs I CVCS e up iselds mese Pwes Vibret.en Reacter Caelaat Closeup 3 m heles lleer Puses V1bretten n Calvert Citffs 3 CVC5 5* no melds meer Amos Vibretten e Coelant Aet et. ND 5anll 7 ene fitpole holds Vibrettee i ! ICCS le Vent er Orate Lane weld Vieretten l Seacter Coelant Cleasse to holds meer Pumos Vibretten 0 C. Cast Rwt ' no holds near Puses er Valves Vibretten VE5 Farley I ICC5 1 NO bold in vent er Dreis Line Vibretten Ft. Calneun i CVC5 2 u0 Wetes near Pumps fibretten Coelant Rectre. I No 5se : ' end espole holds vipetten noddse hect CVC5 I 40 Welds hear Puses Vibration

u. 8. Rettesen 2 Seren lajectlen I

I VES meld MA2 l>tdetermined Indian Point 1 Coolant Sectet. I e Snell 7 and afsele melds vibretten Indien Potet 2 CVC5 3 10 melds hear Pisos Vibretien Rnit 3 a0 holds Roer Punes er belves Vthretten Cant. Meet Prevel l 14 leeld hear Puse V1bretten CPee Vetere Control Instaa Point 3 I Vts Weld '.susstere'ned CVC5 I se held Beer Puse Vihrotten toweenee i ! CVC5 2 IG Wales hear Pumps Vipatton teacter Caelant Cleente I up Weles meer Puses Vtbretten Itillstone 2 Lieute And teste -1 Vt1 ueld IESCC ECCS I 40 Vent er Orate Lise Iseld Vteration herth Anno 1 CVC5 I N0 leeld meer Ase V1petten Metastaan Sesely I no Instrument Line told Unteentt fted f Oconee 2 (CCS I up Vent er Drate Lies teeld Vibretten Oconee 3 Reactee Care isoletten Centtag e 1 NO Sasole Line Iseld tipa en Paltsades 1 CVC5 I g0 Peld hear Puse vibretten Coolant Mirt. 2 u0 5 ;11 i er stante eteld ,Vtheatles Fretrie Island i EME 1 W Mmeer Page er e'elve tigretten Point Beach I Caelent secter. I go laell i er stoele eeld Vibretten Point seeca 2 CVCS 1 NO meld near Pure vibretten 8.t. Glana I Safety Injectten i VE5 keld 165CC CVC5 5 10 Wales near Pumes Vibretten $41ee I Caelaat Soctrt. I 30 Snell T or Risele terlds Vibretion CVC5 1 40 Wel near Puse

Vtaratten San enetre i Contatarent lerey i

vil unto NA2 BCSCC Coelant tec*rt.. I e 5 sell T er utse e leald Vipetten n Svery 1 CVC5 I no utig nee, p,,, g,g,,,,,, --eA5t3 04 LIR*5 Vse0uGs 5CPT. 99 I 1 Au& Ink i

q d j. SUMARY OF PWR PIPE CRACKING EXCLUSING S.G. FEEDWATER N0ZZLE CRACKS PLANT SYSTEM N0. PIPE. SIZE DESCRIPTION PROBABLE CAUSE l LERS I4" Surry 2 Containment Spray 1 7ES Weld HAZ IGSCC Three Mlle Island 1 RHR 1 NO Weld Near Pump or Valve Vibration Condensate F.W. 1 NO Socket Weld Vibration Coolant Recirc. I No small T or Nipple Weld Vibration Containment Spray 1 YES Weld HAZ IGSCC Spent Fuel Pool 1 NO Weld HAZ IGSCC Three Mile Ifland 2 RHR 1 NO Weld Near Pump or Valve Vibration Trojan 1 Reactor Coolant Cleanup 2 NO Welds Near Pumps Vibration Turkey Pt. 3 CVCS 1 NO Weld Near Pump Vibration Other Eng. Safety Feat. I NO Drain 11ne Weld Vibration Turkey Pt. 4 CVCS 3 NO Weld Near Pung Vibration Yankee Rowe CVCS 4 NO Weld Near Pump Vibration Reactor Coolant Cleanup i NO Weld Near Pung Vibration Zi@n 1 CVCS 1 NO Hold Near Pump Vibration Zion 2 CVCS 1 NO Weld Hear Pump VibrAtton BASED ON LER'S THROUGH SEPT. '79 S

SYSTEM

SUMMARY

SMALL M") PWR PIPE CRACKS LERs THROUGH 9/79 SYSTEM PLANTS LER LEAKAGE CRACK PROBABLE 'ITATIONS LOCATION CAUSE C 1 YES Arkansas #2. 4 YES MOST FATIGUE Calvert Cliffs #1. Ca'1 vert Citffs #2 5 YES CRACKS CAUSED Haddam Neck 2 YES IN WELOS BY Ft. Calhoun #1 2 YES LOCATED V!BRATION Ind. Pt. #2 3 YES NEAR Ind. Pt. f3 1 YES PUMPS CVCS . No. Anna #1 1 YES Kewaunee #1 2 YES Palisades il 1 YES Pt. Beach #2 ' l YES R. E. Ginna il 3 YES Salem #1 1 YES Surry #1 1 YES Turkey Pt. f3 1 YES Turkey Pt. #4 3 YES Yankee Rowe 4 YES Zion #1 1 YES Zion #2 1 YES Arkansas #2 1 YES IN WELOS VIBRATION . a ho YE COOLANT Palisades #1 2 YES gT,SpL Ts AND RECIRC. Pt. Beach #2 1 YES NIPPLES Salem #1 1 YES ETC. TMI #1 1 YES ~ Indian Pt. #1 1 YES . San Onofre #1 1 YES - - - " - ~ l ff MOST CRACKS V!BRATION ok 1 IN WELOS - Ind. Pt. #2

• 3 YES NEAR PUMPS Prairie Is. il l

YES OR VALVES TMI #2 1 YES TMI fl 1 YES Cal. Cliffs #1 3 YES MOST CRACKS FATIGUE REACTOR Cal. Cliffs #2 3 YES IN WELOS CAUSED COOLANT Kewaunee #1 1 YES IN LINES BY CLEAN.UP Trojan #1 1 YES LOCATED V!BRATION Yankee Rowe 1 YES NEAR PL'MPS Trojan #1 1 YES Arkansas #2 1 YES MOST CRACKS V!BRATION Beaver Valley #1 1 YES IN WELOS ECCS Cal. Cliffs #2 1 YES OF VENT Farley #1 1 YES OR ORAIN Millstone #2 1 YES LINES I Oconee #2 1 YES MAIN STEAM No. Anna il 1 YES CRACKS IN NOT SUPPLY WELD IN DETERMINED INSTRUMENT LINES ( CONDENSATE TMI fl I YES CRACK IN VIBRATION l FEE 0 WATER SOCKET WELD ,-*,m -*-yJ$ w-w e 3 aq ( w g g u y -+- r q hW D

SYSTEM SUMARY SMALL K4") PWR PIPE CRACKS LERs THROUGH 9/79 SYSTEM PLAhTS l.ER LEAKAGE CRACK PROBABLE CITATIONS LOCATION -CAUSE OTHER ENG'D TUR' KEY PT. f3 1 YES CRACK IN VIBRATION SAFETY FEATURES DRAIN LINE WELD REACTOR' CORE Oconei #3 1 YES CRACK IN ISOLATION COOLING WELD IN VIBRATION SAMPLE LIhE, SPENT FUEL'. Arkansas #1 2 YES IN WELDS 'NOT POOL DETERMINED TMI #1 1 YES HAZ IGSCC CONTAINMENT Thdian Pt. #2 1 YES VENT TO VIBRATION 1 HEAT REMOVAL PIN WELD l I l .-..-....-l ) l 1 i l }. i

'4..--.. ' ~. ..n.-..-.a-..n -..-.7--- f- ,4 - i SINWtY OF BK1 SAFE-EM MtD P!PE CRAXIM PLMT SYSTEM No. PIPE MATERIN. ETECTION ESCRIPTION LERS SIZE ETHOD .I r Ur visual AW ar InLti P!Pc Die axx sose eenscv ammes, . SaumfulCI 2 ettleC af PA55 - t 4* 300 UT WELD RAI AMR 2 20* CAA004 STEEL VI$uAL $UCT10m PtPt utLO MAI 1 1P 304 UT WELDED ELecu ECCS LIAE CQufallstui tusitut LIE 1' COOPER I. atCleCULAften 1 4* 104 PT MCIACEAtlos 815fA atttaC 5 aft te 1 80" 304 PT ' O.D. In0!CATIgut Is n022Lt $1 14FE.tu0 TO APV I 2* 304 v!5uAL IRSTRl8E#f Ltat St Ott50ER I RECIRC BT.PA$5 9 4" 4 P 304 115dAL, PT. RT. UT ACACTOR WAftt CLEAput 6 4"46' 304 VISUAL. LEAK. UT. PT Collatn4LIZ14 SuPPLT 1 4* 304 UT MACTOR CORf 150LAT10m C00 Lins I s* 304 MT0A0 Detsolt 2 RECIRC BT-PA15 2 4* 304 LEAA wtLO (CCS l 10" 304 LEAt. Pt. UT CORT SPGAf SAFE tie I ' 10* 304 LEAK IG5CC atACTOR C0At 850LAf!04 COOL!nE sArt. 1 14* 304 !$1 PUBhatt Sta51TIZta Eno V7 PURNACE $testT!!!D - atACTOR CORT 150LAT10e COOLING 5AF1-1 14* EW - PURnACE 5tN5tT'!!EO UT CR0 Rtfunn SAFE.tn0 1 LEAR = OntSOCR 3 FigDeAftA 3 6" 304 Uf Ca0 RETURR SArt-Es0 1 OL Ant ARuGLS REClat 87-P451 1 4* 304 UT utLD ttACTOR WATER CLEAN-UP l 4* 304 VISUAL. ET utLO h42 SAft tha AT APT t 10" J2C:ntL fj5uAL, UT.17 8 N0ZILE TO SAft-EnD CAACE Calv!CE IG5CC 11 NATCM I RtClaC 514A55 1 4* 304 UT AW RT 84 1 2r !!ICOEL PT 'IZPATRICE 1 RHR I 4* visual WLO NA! LA CRC 55E Fittb4?!R N0ZZLt SAFE-EMD 1 4* 304 LIAa Ano T!$uAL IG5CC -- - - - - - ~..... _. MILLSTORE I RG 20 EfJ455 2 2"64* 304 VtSuRL ANO 47 AMR 1 P to 2* 304 LtAs ff5T RCACTOs uAftt CLEAN-UP 1 Jll 304 UT AND LEAA ' htLO Mal MONTICtLLO - ptC!aC sv.PAst t 4* 304 UT P!Pt Ettow 4!ht P!Lt Potti ECC5 1 P 304 UT $AFL-t90 to PIPE IG5CC ECCI 1 r 304 visual Cl#CUNFER!nflAL IG5CC REACTOR unTra CLtAn-up 2 4*84* 304 Visual HEAT RCm List & PtPt Stao alACTOR CORE ISOLATION COOLING 1 4* 304 PT PIPt St9010 $AFE tu0 OTSTER CAttt i CR0 esfuta 1 3* 316 uTono STut Tutt [CR0 1 VIslanL iPARCCR

• t SPRAf

= 304 LEAR STUR Tutt 1 304 PT i IG5CC FidtmACE 5FN5titZtB $ ATE EMO Af RPt t' PEACM SOTTON 2 (CCS 1 12* to 10* Cant 0N STEtt i WT l (Llow la SPRAT P!Pt i med PEACu 30TTOR 3. SECint 81JA55 2 4* 304 UT.PT.AND RT l to IO* CAamon STttL UT. ST j utLO mat It" ned (CES 2 i P!LGA!n i REACTOR WATER CLEAN-UP 1 4* { 304 ( visual utt$ OuAD CIfits 1. 4tC:nc sv.PAsl 2 4* 1 304 I vtSuAL, UT j

UT t wt0 l 304

- OuAD Critts a atCtaC :T-PA55 2 MACTOR WAftt CLEAN-up 1 r 304 vl50AL l stLO n==T iA ut i ECC5 i i e 304 nr , PtAus tt A A. LOOPS .A.0 0. u.5 - uPT.,, e. h.

Table 1 - Summary of PWR Feedwnter Piping Cracka PLANT EXTENT' OF CRACKING (NOZZLE VICINITY) PIPING COMPONENT PROBABLE CAUSE COMMENTE . Max. Location mnx, No. of Linen Depth _ Depth Crack _ Crncked Wen tinnho - h0P 8 of 8 elbow Corrosion Assisted 2 cracks thru wall D. C. Cook 1/2 Thru wall Fatigue Baaver Valley-0.400" 9 0' clock 3 of 3 elbow corrosion Assisted 13 additional' fab.. relate Fatigue indications' repaired Knwaunce 0.050" 7 0' clock 2 of 2 pipe Corrosion Assista 3" dia. aux.' feed near Fatigue SG inlet Pt. Beach 1/2 0.047" 3 O' clock 2 of 2 reducer Corrosion Assisted 3" dia. aux., feed near Fatigue SG inlet II.B. Robinson 2 0.750" 9 0' clock 3 of 3 reducer Corrosion Assisted Shallow cracking-in nozz] Fatigue under thermal. sleeve Salem 1 0.235" 4 of 4 elbow Corrosion Assisted reducer Fatigue i San Onofre 1 0.100" lower half 3 of 3 reducer Stress Assisted Multiple branched cracks of reducer Corrosion evidence of some fatigue i Surry 1/2 0.080" 2 and 5 6 of 6 reducer Corrosion Assisted O' clock Fatigue Ginna 0.107" 8:30 0' clock 2 of 2 elbow Stress Assisted Cracks also at deep Corrosion / Corrosion machining marks .j Fatigue i 'Zior 1/2 0.088" 4 0' clock 8 of 8 elbow pipe Corrosion Assisted l. Fatigue

2 ~ Tabic 1 - Summary of PWR Feedwater Piping ' Cracks Pl. ANT EXTDIT OF CRACKING'(N0ZZLE VICINITY) PIPING COMPONDIT PROBAELE CAUSE _COMMDiTS Max. Location max. No. of Lines Depth' Depth Crack Cracked Comhuncion Engineering Hinntone 2 0.250" 12 0' clock 2 of 2 pipe Not analyzed Pe11naden 0.170" 3 and 9 0' clock 2 of 2 pipe Corrosion Assisted cracks found also at veld Fatiguo vicinity of horizontal Piping 9 i e 9 e - -}}