ML20140G268

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Summary of 750410 Meeting W/Util in Bethesda,Md Re NRC Concerns Involving Effects of Pool Dynamic & Relief Valve Loads on BWR Operating Reactors & Reactors Under Const.List of Meeting Attendees & Viewgraphs Encl
ML20140G268
Person / Time
Issue date: 04/16/1975
From: Cudlin R
Office of Nuclear Reactor Regulation
To: Lainas G
Office of Nuclear Reactor Regulation
Shared Package
ML20140F372 List: ... further results
References
FOIA-85-665 NUDOCS 8604020046
Download: ML20140G268 (41)
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{{#Wiki_filter:O I UNITED STATES k y NUCLEAR REGULATORY COMMISSION W ASHINGToN. D. C. 20555 .1 APR 1 6E II ~ Gus C. Lainas, Chief, Containment Systems Branch, TR THRU: John Kudrick, Section A Leader, Containment Systems Branch, TR MEETING WITH GENERAL ELECTRIC COMPANY - POOL DfNAMIC AND PELIEF VALVE IDADS ON MARK I AND II CONTATNMENTS On April 10, 1975, a meeting was held in Bethesda, Maryland with the General Electric Company (GE) to discuss our concerns regarding the effects of pool dynamic and relief valve loads on BWR operating reactors and reactors under construction; i.e., reactors utilizing Mark I and Mark II type contain-ments. Copies of the vugraphs used by GE and a list of attendees are en-closed. A su= mary of the items discussed is as follows: 1. GE su==arized their preliminary analysis of pool swell loads on torus internal structures for a typical Mark I plant. The structural analysis was based on swell loads extrapolated from Mark III test data. GE indicated that their conclusion was that some local yielding in the vent header support struts could occur; however, structural failure was not predicted. 2. GE will be advising all their Mark I customers of the potential concern on pool dynamic loads at a meeting in San Jose on April 23-24, 1975. 3. GE indicated that letters were sent to all their Mark II customers regarding potential concerns on relief valve loads and pool dynamic loads in January and February 1975. Each utility is in the process of evaluating their particular design for the loads under consideration. 4. GE stated that they were looking at the availability of facilities and materials to do pool swell testing, including the effects of air compression for Mark I and Mark II configurations. 5. GE stated that they were about to initiate a series of steam quencher tests at their Moss Landing facility. The purpose of these tests was to evaluate the load attenuation effectiveness of a number of relief valv* discharge line nozzic designs. We informed GE that we would consider the infor iation that they had provided in determining our course of action for resolving the concerns on pool dynamic loads for Mark I and II containments. We also indicated that we would need substantially more detailed information in the near future re-garding their methods of determining loads for Mark I and II and that testing for these configurations may be necessary. y'b tuTso,4

Enclosures:

Robert L. Cudlin q As stated Containment Systems Branch y g cc: See next page Division of Technical Review i /

    1. /6 19N 0604020046 860114 N.l g PDR FOIA U

FIRESTD85-665 PDR

Gus C. Lainas m1 6 WF5 cc:

S. Hanauer F. Schroeder i R. Boyd i R. Tedesco J. Glynn R. Fraley, ACRS (3) j NRC PDR J. Kudrick t R. DeYoung G. Lear W. Butler P. Riehm L. Slegers D. Crutchfield K. Goller A. Gluckmann L. Shao R. Maccary D. Eisenhut E. Jacobs J. Shapaker I I I i J I ?

D ATTENDANCE LIST GE - NRC MEETING APRIL 10, 1975 GE t."dC L. S. Gifford R. L. Cudlin P. W. Ianni J. A. Kudrick C. M. Johnson R. L. Tedesco L. J. Sobon F. Schroeder D. A. Rockwell R. C. DeYoung G. E. Lear R. S. Boyd W. R. Butler P. F. Riehm L. Slegers D. M. Crutchfield J. C. Glynn K. R. Goller A. L. Gluckmann L. C. Shao R. R. Maccary G. C. Lainas 1 i' j aep. ) \\*

i PRESSIFE SunmESSim TESTS CCIUJCTED BY TE MRAL El.ECTRIC CDOM M: Sces 0F IHE DATA GENERATED DURING IHE IEST SERIES IAB BEdM is GENERAL ELECTRIC PROPRIETARY INFON% TION. Ibecurr BAY INITIAL COEENSING IESTS. StMR 1958. e EK-3143. }beots hY INITIAL IRANS!ENT IESTs. 19'Ih. G e lheoug BAY Ftn SCALE 3/48 SEGMENT IESTS. SLMR 1960. e GEAP-3596. EcresA.hy N. Scaz V112 SeesNr Insis 0962. h o MY PSAR. DocnT !6.' LE.' BODEGA kY h SCIE 14 SEsMiNT ltLTIrt.E VENT IESTS.,, e hW u 6Y $ppgyn y,' JV& bccu w 8'.h.74 l A.J.J. y.. - --- - --.---- g,-9 p.--m-,- 7, m, - -,- - - -. e---.- -a,,- ,,.---,-w -,,,-,.-..r-- +. - --,-----t-w-

EUAL RECIRIC 10R12[IWL WIT _ PESSLE StPPESSIGI TESTS D001Bff4TIGi iWf( OF TESE EPORTS AE PROPRIETOR ( TD llE GElBA 10TE: CUFM PRESSURE SUMESIm POOL INVESTIGATImS JULY B70, ISb13051. PRESSURE SUPPRESSIm AfD flEIR VENT IEST PROGRm itINIM VENT IESTS lhY B72, 5}-130F2. PRESSURE SUPPRESSim IEST PROGRM Smu. SCALE IIORIZO OCTWER 1972. IEW13053. k Ill Qw!RMATmY TEST PROGRm PRomESS PEPmT. sh!L1973. tE W 19848. h III ANALmCAL INVESTIGATIm 0F SMAu.-SCALE TESTS Pn0@ESS REPWT. AUGUST 1973. I G H 0976. THIRDQUARTERLYPROGRESSREPORT: IhRK111CONFIMTORYIEST EDD-2021A DECEMBER B73. PRESSURE SUPPRESSIm IEST PROGRm Smu. SCALE tests. Jm EIM-133G5. k Ill QNIRMATmY IEST PROGRm PHASE 1 - l.ARGE SCALE DEMONS TESTS. OCTWER B74. IEWL777. Femm QJARTERLY PROGRESS REPORT: IN lli CONFIMATORY IE EDD-20345. APRIL 1974. I FIFE QMTERLY PRO @ESS REPmT: b lli QNINTmY IEsT Pn0GRm. i EID-20550. JULY 1974. ~ A.J.'J. 24 B 5 .__._--_-.---___--,--,-,----_,.m---.~,----__- ,y --__,_.,,-.,m- ..,__-y-w-c.,..,_m

2-Stxm OtdRTERLY PROGRESS REPORi:' OCTOBER 1974.' O.ETTER IRANSMITT To i K STAFF). SEVENm QMRTER.Y PaocaEss REPmT: INK 111 CONF [RmTmY IEST PROGRM. IED-20732. IkceeER 1974. e 0 1 i l 1 \\ AJJ.J.' 2/6/75 1

CONTAINMENT PHENOMENA NRC ACTIVITY SAFETY / RELIEF DYNAMICS ~S/R PIPE CLEARING SCHE MARK I START-UP' TESTS SHOWED VIBRATION DAMAGE e 10/72 QUAD CITIES #2 TEST TO INVESTIGATE PIPE CLEARING e 12/72 LOOSE HEADER HANGERS AT QUAD CITIES #2 e 4/73 NEDO-10859 - VENT MODEL + QUAD CITIES DATA e 5/73 e ADDENDA FOR TOPICAL REPORT FILED 9/73 e NRC REQUESTED MORE INFORMATION 11/73 e GE StBMITTED RESPONSE TO NRC 12/73 e TORUS TESTING AT BROWN'S FERRY #1 e TVA FILED TEST REPORT e TVA/GE AGREED TO MORE TESTS ON BROWN'S FERRY #2 3/74 e 'lutC LETTER TO GE ON NEDO-10859 SOUGHT MORE TEST DATA 4/74 e GE HELD SEMINAR OF MARK I OWNERS, RE: TESTS 3-22-75

4/74 JOINT PRESENTATION MADE TO NRC ON TESTING e e SEVERAL MARK I OWNER'S REQUESTED GE WITHORAW 5/74 e GE WITHDREW FROM LEAD IN LETTER TO NRC 9/74 e NRC STATES QUAD CITIES DATA NON-CONCLUSIVE FOR NEDO-10859 1/75 e NRC REQUEST FOR GE MARX II - III PLANS NRC LETTER TO MARX I llTiLITIES ON PLAN 2/75 e 3/75 e GE GROUP TESTING INFORMATION TO ASSIST CLIENTS 3/75 e GE RESPONSE TO 1/75 NRC REQUEST s O O e o e G 3-22-75

NRC ACTIVITY -- CONTAINMENT PHENOMENA SAFETY / RELIEF DYNAMICS HIGH TEMPERATURE CONDENSATION 11/74 )

  • GE MEETING WITH NRC ON PHENOMENA 12/74 e GE REC 0 K NDATIONS SUBMITTED AS REQUESTED 12/74 e GE TRANSMITTED " WHITE PAPER" TO CLIENTS 1/75 e NRC LETTER TO GE AEKING MARK II-III PLAN 2/75.

e NRC LETTER TO MARK I UTILITIES ON PLAN 3/75 e GE INFO PACKAGE TO ASSIST CLIENTS - MARK I 3/75 e GE RESPONSE TO 1/75 NRC REQUEST RE MARK II & III 3-22-75 l }

NRC ACTIVITY -- CONTAINMENT PHENOMENA LOCA DYNAMICS e START PSTF TESTING (VERIFY MARK III MODEL) 11/73 e REORIENTED TEST TO BOUND IMPACT LOADS ABOVE POOL 2/74 ) e REPORTED TO NRC VERBALLY IN PROGRESS MEETING 4/74 ON TYPICAL NEW LOADS e REFERENCE MARK III LOAD CRITERIA CHANGES IN GESSAR 5/74 e REFERENCE MARK III CONFIGURATION CHANGES IN GESSAR 7/74 e NRC REPORTS PSTF DATA INSUFFICIENT TO UPPER BOUND 10/74 IMPACT LQADS e START 1/3 SCALE TESTS TO CONFIRM UPPER BOUND 12/74 j e NRC NOTED POTENTIAL APPLICABILITY TO MARK I & II 4 /,4-l 3-22-75

l PP&L ANNOUNCEMENT, PP&L/SUSQUEHANNA MARK II IN EARLY STAGES OF WETWELL CONSTRUCTION j WETWELL DESIGN IS DIMENSIONALLY MOST DIFFICULT OF THE MARK II'S RELATIVE TO NEW PHENOMEM WETWELL IS CONSTRUCTION CRITICAL PATH -- #10 DAYS FLOAT DECISION TO STOP WORK CURRENTLY APPLIES ONLY TO UNIT #2 RPV PEDESTAL EVALUATE NEW LOADINGS vs. EXISTING DESIGN CAPA81LITY l IDD(TIFY ANY NECESSARY STRUCTURAL FIXES INCORPORATE INTO DESIGN & CONSTRUCTION AT FRONT END TO NEGATE ) NEED FOR RETROFIT LATER ONE TO THREE MONTHS TO RESOLVE IS CURRENT ESTIE TE KEEP C0ftRECTLY DESIGNED PLANT ON CONSTRUCTION SCHEDULE

MARK 11 CONTRACTUAL INVOLVEMENT CONTAINMFNT Pl'RCHASER/0WNER RFSPONSIB1lITY e DESIGN e SUPPLY e CONSTRUCT e MEET NSSS INTERFACE REQUIREMENTS GE RFSPONSIBILITY PROVIDE NSSS INTERFACE REQUIREMENTS l e l e PHYSICAL / DIMENSIONAL ENERGY RELEASE FROM NSSS PIPE BREAK e i ENERGY RELEASE FROM S/R VALUE DISCHARGE cd vM e CALCULATE PEAK P & T FOR CONTAINMENT RESPONSE T e l LOCA RELEASE --- OPTION FOR SAR i l i I I I l i _ _ _ _. _ _ _ _ _ _ _ _ _. _ - _ _ _ _ _ _ _ _ _ _, _ _ _ _, _, _ _. ~. _ _ _ _ - - _ _ _ - _

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OPERATITIAL CD:iCEM O e e 9 JLM 12/6/74

019916 \\ t PIPE CLE1 RING FORCES - BACKGROUND M1 HOR DAMAGE IN. WARK I TORUS .~ STRUCTURAL MODIFICATIONS WERE MADE TEST PROGRAM AN3 REPORT - QUAD CITIES MODELS DEVELOPEG ADDITIONAL TESTS AT TVA G 6 6 a l l e e JLM 12/6/74 ,,-.---,.--.,-,.n, e

4 QlRRENT DEVELOPMElGS j t t' l MODELS DEVELOPED FOR MARK III TEST FACILITY UNDER CONSTRUCTION TO CONFIRM BUBBLE MDDEL 1 1 MARK III WORK INDICATED POTENTIAL IMPACT ON MARK II i i WORK APPLIED TO DEVELOP BOUNDING CONDITIONS FOR MARK II. i i i MARK II MODEL IS STARTED f FORCE REDUCIllG QUENCIIERS ARE DEING EVALUATED i AGAINST ALL CONEERNS i i I i 4 JLM 12/6/74

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COMBINATION LOADS FOR STRUCTURAL ANALYSIS EXAMPLE: SUPPRESSIO:4 CHAMBER WALLS, BASEMAT AND RV PEDESTAL

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  • HYDROSTATIC LOADS
  • PRESSURE AND COINCIDENT TEMPERATURE LOADS
  • SEISMIC LOADS e S/R DISCHARGE CLEARING LOADS e MAIN VENT CLEARING LOAD e MAIN VENT HORIZONTAL LOAD (INDIRECT) e POOLSWELLLOAD(INDIRECT)

SUPPRESSION CHAMBER LINER (ACT AS LEAK-TIGHT MEMBRANE) e HYDROSTATIC LOADS e PRESSURE AND COINCIDENT TEMPERATURE LOADS e S/R DISCHARGE CLEARING LOADS e MAIN VENT CLEARING LOADS 3-22-75

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MARK I HEADER LOAD CONSERVATISMS BOUNDARY CONDITIONS ASSUMED ALL AIR CARRY OVER USED BREAKTHROUGH HEIGHT OF 2 X SUBMERGENCE BODEGA INDICATED 1. 5 X USED INFINITE OCEAN (SOLID WATER) 1-2' LIGAMENT EXPECTED AT HEADER ELEVATION PEAK DN PRESSURE CONSERVATISMS MODEL CALCULATED LOAD IS 20% HIGHER THAN MEASURED (USING TEST BOU!!DARY CONDITIONS) C0:lCLUSIO!!: TOTAL CONSERVATISM MAY BE AS HIGH AS FACTOR OF TWO JAR 11.9.75 9

N b 'w N0 7 s \\ w[ VEE PIPES G'-t * ENT RING HEADER f 4-r ( ~ g - d. ,A VACUUM RELIEF s ~:<-- 4t s / y /- - .M.%' wwNCoe.ERS 3 gi, 7,,.. 2.'-1o WATER LEVQ 7 y y.0* JL -- 4 --- FIGURE B. MARK I TYPICAL VENT SYSTEM ( BROWNS FERRY) n ,-a

i l LMDS SUPMARY i I BASED ON PRELIM DYNAMIC STRUCTURAL ANALYSIS. f - EFFECT OF BELLOWS a PIPE _ DEAD LDADS 20K _ JET LOADS 120K _ POOL SWELL LOAD, (P V TIME) _ LINEAR ANALYSIS _ KEY ASSUMPTION CAPABILITY OF COLUMN. 252 K'

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  • M 255 K PLATE 184Ky RESULTANT TENSION 780,000 'EQUIV. LINEAR"

[DEFLECTIONOFCOL=.575" No PROBLEM DEFLECTION OF VENT =.35'

gSCLEVISNOTRUPTURINGATESSTHANCOLUMNY.P.SO oz (A) COLUMN CAN ABSORB ENERGY IN PLASTIC RANGE (51%) (B) POOL LOAD DROPS TO ESS THAN 780.000 EXAMPE 11 COLUMN STRAIN X 700,000 IN f. g g ENERGY X 500,000Mf TO ENTIRE PIPING IMPULSE CAN BE HANDLED WITH MINOR DISTORTION OF SYSTEM. CLEVIS WILL BDI RUPTURE BECAUSE (A) CABPABILITY BASED ON 'OMSET OF DISTORTION" fl01 ON RUPTURE. (B) USED MINIRE MAT'L PROPERTIES (C) " CONSERVATIVE' ANALYSIS BY ANALYSTS BEST JUDGENT IS THAT CLEVIS WILL HOLD TOGETHER TO EMABE COLUMN TO STRETCH. l a

EVEN IF CLEVIS FAILS - (PRELIMINARY LINEAR DYNAM MIAN VENT PIPE " MOVES" UP 2-3" - STOPS AT 1" MIAN VENT STRESS 30-40,000 ps/ WORST STRESS IS RING HEADER ATTACHMENT TO MA VENT 5% YlELD. (MAINVENTSSUPPORTRIN BENDitlG 2/3 TEllSION 1/3 M0 BY-PASS OF STEAM EXPECTED. (CDULD TOLERATE 2 FT '- BY-PASS FOR LOCA WITH NO C0flDEllSATIO I f I. N': ~. l

1 STRFSS ANALYSIS CONRFRVATISMS i 1. LOAD APPLIED UNIFORMLY ALONG HEADER. \\ SENSIVITY COULD BE AS HI6H AS 2 2. JET LOAD TIMING VS STATIC 3. MINIMUM YIELDS USED. 4. ' FAILURE" DEFINITION NOT IRUE FAILURE

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