Regulatory Guide 1.18

Structural Acceptance Test for Concrete Primary Reactor Containments

ML13038A421
Person / Time
Issue date:	12/28/1972
From:	Office of Nuclear Regulatory Research
To:
References
RG-1.018, Rev. 1
Download: ML13038A421 (5)

-Revision~ I4v. U.S. TO I ENERGY COMMISSION* REULATORY, GIDE,.0s DIRECTORATE OF! REGULATORY STANDARDSR.EGULATORY GUI1DE 1.18..STRUCTURAL. ACCEPTANCE TES FOR CONCRETE.............:....PRIMARkY ýREACTOR CONTAINMENTS'A.INTRODUTO containiment's structuLralu~O elerrents: andý thle ci icks of its>Aurlace ,concrete a re wit hi~n acce~pt able limits.Generat :esiaI Criterion]:. -Quality Standards and, : ..o0,.a0Geairi ng thle test. the con tait menI is prssu t:Desigil Curteria tor Nuclear: Pbwer Plants.".: r~equirest that- ncremi~ensutoheauLu ltpesicTiAll\.structure,, svistLens, and componen .ts; of uclea~r :power an. evaluation of its deflections. as. a ftinctoion oflleternapl ildns imporillt to safe.i b es qulit snr pressure as the test proceeds and provlde a melnslolconm.esrate with the importance ..of othe safety depressurizing the contai.n'en.t it :its."i.'.spons dev.iafunctio oh etre.Thsgiedsrbsa significantly from the expected rcsponse..The n umbci t)aciep le h mehd ot implementing thi s r .equirement :Pressure increments is % idta) .ýwih regafd tjo. the. initial structural..i. acceptance test, point foi the aluation.. o the Wflci% demonstraics: the capability of a concrete piimary The maximumif test piess~ure adopted follows thie piacticerfeactor, containim'en to withstandl postulated. pressure: employe.d. tor steel pressure vesscls.lodsfhe testsL-demonst rating that the6 le akage through.the iii. within acceptable limits are not The ..ial and .d.vrtical .de.flections o:.ihc p.i s:,,ciii.edcoveted by this. guide. The Advisory Committee on~ contain~ment -aie measuired at several locations aiocind-its... .: ' : ... ", ', ' c-:. ...: ... ". ., .ircumference to est, r th e tai e nli S,cr )less u ae in t m il...o .Reactor.Sate.uards has been consulted concerning this circum..Pence to.determine the c in tensile.:.. *..irde has, concurrde d i n the reoulatory position. stresses including those due t o.p ":s :ih ".itilout.-of-.rounldness of. the .nofiinialiý c vlinldnic icontai .enttn..S.t.r in an ack widt s -aie eisurcd .od..B. -DISCUSSION% crack patterns :arc rectrdd tloaton f reicehigh.stress u t.:<conrifair.thie designer's tressi analysis.,: .. ..: .iet.tn e fors a.guide water-cooed n s fBecause thestrain tmeasurements r lie ted 1,..w i ohirine a qd:-t : hea ud *i nitaia .sttru for a .. a t~e r-acootedt .:..n s o .teev laln .o ,h... o t m e !:.rep n e ....... ia"e aii fao eeprmdeflection measurementsobtained.inprvioses"iipower n Plant is the. structure or Vessel -that ed Min " testsboundar as fined in § 50.2(v) of 10 CFR Part 50. pan I id ser-.es as a l.e kagee-limiting barrier to radioeactive nonprototype Containments.materials the. reactor coolanit. pressuie T11v tile::* ..ndar , T h e s ui -i. the reactor coolant that m ight A pprorie ate mdisurep t a ed I ti0 cn li rm thebe dischargzed from-the reactor coolant systern into the dirumTereports used atse *u"cirea d ite toi!!!:' w ll le allat .... g, ......f'll, ..primary reactor conitainment% during a loss ofcoolant evlaeaysgien eeirto f thsruueaccident -would Cause a significoaon*t.pressureload on then"l. .-containmt enent. An Sanptance test is commkonly used toTi dsaesn r r iii 1 .-confirm 'ther desigp and configuration :of :the iticableasurementcdbmt ica' um.r..;.t.ricontainmsens are adequate to wrthsianctd sch pressure 2prt ye cnt " iiu.lImori{:ii e now "w." .. ..no. Th ..... .. .....dernnsrotestyp L cooan m ns ."r e by ....s ::" ."": i...!.4 ..i.1. ..! .i {:!loadino The ~tet demontratesthati: when the .unusualidesien~uco.e ofrmdytss:sdsusdi* .. ...:n :is ,s :i:i .a.i~ l: g :i tn ivco : ta:i ment j:s:: .pressurized the deflectionst of the A of ti.USAECor:erULAToRY GUlIES copesof. Tublih.redoudemay.. he ..i.asined by ret 41.indcting e:ired to te U Atomic Energy CommiissionW go n De. >2OM-.':Re--aor u des r i&6e to decie and rishea valal to the public Attention. Director' olf% eguliatory Standards. Commrrents and suggestios 11 0,. t)rinretfods a.rorr~able oti AEC Resiaoysafo mlmnigspecific Parts of improvements in these guides are encouragein shoufd be sent to tflh rrtri'-i:.i tt t delineate techniques used by the siaff in 0f ithetComm.aissior.. U.Sa iAtfomnitc Eneesrgy uComm1ission .... s ington- o .C .205, :.:__ _ evaiuatnr. specific trobie..s or p.etul." e d accide.ntsi or tom povide guidance to Attent Chief ublic eProceedings Staff:acprcar RguatryGuides are no, substitutes foreul tin and conpliance-1rh' thm irtr, seired Methods and oltnsdifferent from those set out in The gu ides are issued in the follow~in~g tienbroiad divýisions .W~~~~~~~~1 -s lco onnac faDmrnn or i~celnse byit-e commission. 1. PowerReat .BPou.2. Research and Test Reactors 7 Transoortarion3: Psiels anFaeil acilit ies. I Oc~cuoatrnarl He, 11iPale A.- E ronniosr l ai h e i ata ar a ind siting 9 Antitu reutl i ,...i-,q 'ciing to r.es .':t.nw ; inei om ono te

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• a ria u su andePlanT-Protectin ne r .al C., REGULATORY POS1ITION.1.(nufete~ pirimlary rea~ctor :ddntifininent\ should besubjected lt) an JUCeptfc ieý,ihx ineses thePontaimn ainernal pressure nlu imrapproxijmate y equal pre~ssure ::iiicreinents fr omTatopeic pressure to. at least: 1.15 times, theLcon ,t.ai %n :n .i .e n .tdesiiunrpr .essu ,re. The conrtainment shoul"'d -b.e.depiess-uný.!Zed 'in' -the. same numnber of inc.rements.Measuremens, sI should. be recorded: at atumosphienip~ressure-s ,and atec rsuelvlof thpe pressurizationaind decpressfirjation 6c Lies. At each level, the pressureshould-belhcld cons~tant to r at least one hour before,-thedetflee lions;'and' strains are recorded. Crack patternsShould bc ricorded at -atmospheric pressur~e both beforeand. mirmediatel.. alter. the test. and at the maximumnPrCSSUrTC I tel achket-d during the test.SoJ. thiat a complete -pictuie of the containmentsoverAll d~edý,on pattern can be determined, the radialde--fin'S, of tile Containment should be measured atSe~erial points along six meridians spaced around. thecontainmne nta. including locations with varying stiffnessJiaracereisties suh: ais- buttress. wvall. large opc~ning4 ar.ý_coflflct ions. with otlher structures.Vertical: deflections of the containment should bemeasured, at' thle. apex :and the springline of the dome.Fomr c-vlifdrmal- containments. these points should belocated as shownil on Figure A. For cone-cylindercont -ainments, these points should be located as shownon: Figure B3.oThle! radial and tangential deflections of theCon~tamnm; iedt iI0adjacent to the largest opening shouldbe mneas .ýure a t, twelve pointis as sho~wn o n Figure C. I fthe second largest opening i-s structurally loaded in adiflerent .mann'er fromn the largest opening, similarmea~surmients- should be made. The measurement. pointsLa etre or relocated for openings with differentconfiour ati~ons. taking into account the distribution ofslreswes and: deformations anticipatedinteprcur4. The pattern tj- cracks that exceed 0.01 inch inwidth befre.during. or after the test should.be mlappednea th -bse all intersecution, at midheight of the wall,at the ý'pringline of sthe domne. around the largestopening." 'and around- the :second .largest opening. ifstruciurally: 16a'ted' in ai different::manner from thelietopen in In.- rprestrýesse d .con tain ments. -the crackpatle'rn should Al-so- be mapped at the intersectionbetween a, buttress :anld- ýthe. wall, at the intersectionbetween'the, top. ring girder and the wall, and on the topshel f, o th rino gýirde6r.: At each location an area of atc ..last 4 uaehtsolbempped.In pi OtOtv~pe containmfients only! strainmeasuremient~s .in te 'Concrete sufficient: to permit acomnpleteý e ,valuation Of* strah -distribution. shoudA bedetermined at the following- loations--in the'rwailla atý the top 0)1 the base m~at onsone meridian.b. at ýthe la rgest opernin, prxmtly 0.St -fr~orn ,theredge of the ,openin , jbength ta thcness atIthe edge: of thieopemihg). anid,c.at the level of theý springline~ of thedoeo.,.one mieridian ."-4lhese measurements should be, hd avth re~e-'.positions:within.the wall, i.e., ne, .r he' .nside ;the.:midpon ad nefTeoutside face. In a prototyýpe.* jnt a.p~rxmpresr containment theo `t-rtic, hio riio.ta and/ ii:,. a fd:.shear..:strainrs in theconcret.shou.d b.... niesured .nd .one "restressin- anctior 0.o a vertical t4ndon Th.imeasurement s!ould.rbe Iade.-at a distance: belo.w thebase Plate of' one. half`:thewid.th.% o1 thease..6. plate ata distance :normial..tob .the w-all. from iecenterline of tfihe. tendon o:of approxi Iandone-half tendon duct dianmetes'. -.6. In. noniprototype conitiainmients.str~ain measiuirneients:!need not be nmadeif st:rai a:ný leve's haive with deflection measurements during the acceptaance testof a prototype containment.7. Any reliable system. of displacement meters:, opti caldevices, strain gauges. or other suitable apparatus may.b be -used. for the measurements.. .- --...8. The environmentalconditi6ns.. diuiingihe test should'be measured in such-* mamhner s'id.o"such-an.extent'that-------will permit the evaluation,:.of. their. con"tributio "is to theresponse of the- containment. Insideand 6utsidelof thecontainnment, -temp:erature. pressure, and 40 i"humidity should be.n.oiipre d c,¢iiinýuousl dunng thetest. In 'addition, theiteimp4era:tiui-eSinside and outside the-,-containment should.; be:. measured.". for '.ng, iq.periods of tinie lprior,.o t:. .test.iAoestablish anai:anierage,temperature of :the. wall to: 'be:'used fin -:evaluating: theeffects of temperature changes .onthe andstrain measurements.9. The environmental. conditions under wlhichthe týestmay be conducted: should be .specified.W-The test d shold,.. -not be conducted under extreme .:weather co.nditions,such as snow, heavy -rain, or stroi9g:wind..10. If the test pressure drops-. due to unexpectedconditions toor below th level theentire :test sequence...sh6_uld deviations from. tIfe:. prevlouis-tesr shod he recorded.andevaluated.11. 1f any sigfificant: modiific.atitions: r. tepairs -are made- -to the. contaifimen.t:..f6llowing-.Ihe.testi..~t the:test should<berepeated.12. The following informaition.-should beihcluhded in-'thePrelimina-ry-Saf ety "naysis Re.ort *-.a. a d e~c f6n"6 (!tlhT;ioas t acetet`a a dscripion: of te :proposed ;acceptnef----b. lthe.i.:nu: mericM values .tihe predictied response.-..of the': struc-ft1utre .::c ~ ~ 1 th olrn es obpermitted on theý predictedres§ponse..in.. thie' acceptance-test, and.'d, !the the predicted res onse an dthe'tolerances were established * -

Th.... .l.ollowng or~matiOri :huld:be.inlUded inntie:'- d an evaluatior) of any, devia:tio-ns. Ji: effl- tet.e...results that.exceed the alowale limits)ta., a- description of. the test procedure, and the o1 thfedeviations and the need for.Lorieve.-istirumentation: *adb. a cmparison of the; test measutrements With thealowa": .: ible imits"(predicted reF~ponse plus tolerance) for for. adcs .of the c,: td. ........': "" "dellections:...:.. .ains, and crack width-. , .e. a :di scuss'ion. 6 ;.tie!...: uiat lfety margin.an..evala.ion of the estimated accuracy of the provided by. the structure as, deduced lroin, the-' ..measurements: results.~4 (V)Top of Containment.~---3 (R, V) Springline of Dome or Top of Ring Girderko 2 (R) Midheight of Cylinder-1 (R) Notes 1, 2& 3ELEVATIONNOTES:1 .Radial* (R). and Vertical (V) deflections should be-measured at the pointsindicated:by (R) and ..2. Where-a.-rigid' base/walI- joint is used,; Point 1: should be above thR base oif the-wall at a distance equal- to -three times the thickness of the wall at thelocation where-the deflection -ksmeasured.3. Where a .non-rigid bate/wall joint -is used,. Point 1 shouldbe- at the base ofthe-wall.CYL .NDRI L C ONT;INMENTS-FIGURE Ft ee F. bo A -5 (R 5 V Intersection: of D me'and'FCone:Midheight1of 'Cone_(3 R) nte'rsection'o'f Cone and Cylinder~- 21(R Mhiht. ofI 4y-!iner,--4-11 (R) Notes 1:and'2NOTES:1l. Radial: (R) and: Vertical: (V:) deflections should be mreasured it; the 0.6intsindicated by'('R) and (V.).2. Point 1 should: be above. the base-of themall a dis'tand'ei ea' to thr~eetimesthe thickness of the wall at the location-where the;deflectioniis meiasured.3. Test Points 2 and 4 may be adjusted to fal midwaybetweeoncf lpoo-r lo~cajtions.CO"NE-.CYLINDER C .. ,"ONTAI:NMENTS-Fl F-F', ~F2~F F7FI F~~ ::,i~:~F F~F~'F'F 4~F. 4F ~FF;F ~FFF F4 F FFF4F ' 4 FF F ~F FIF' F FFtFtFFFtF FF4I FF:IGU RE B!iili4: I F , "...I.F.. -.iil., : ;...." ? , .I ,-,-=:.1.* ,,": ,: .:..2 ....3.,- Fh:: ,: .. F.

• A..':; .. .. .i,,-~ ~~ ~~ .. :. F .Ft.:. 4-.. ,:: i .; :.;:.iF:j-FFF ,.!,: , , F. : ? FF:;, .I.'TES:All'-points~should.:be located..symmetrical.lyIa.1bo.ut-theo...pe.nping..Deflections: radial and tangential -:too e ..ali shoudld -1measur 'p~ointsidicated. -.Se .paragraph C.3.LARGE O.PEIGN CONT.: : I N,. t: NTAIN:ME:NT.. : '::i ..*.: ..:! *. ...:: .::FI.GURE C F.1 4 F"'. F FF::: :; I O 'i :! F : : :::;:: ,: :; : : :.. .. ., : ...- ,! ... ..., ,; .:...:. : .. .:: :..F .. .I,: * ...jF O 9 ..., , .... FF .. F .F F ..-F .. ..

I1ý .........C ..APPENDbIX A-",.4 iPOOTP CONCRETE P.RIMARY R-EACTOR CONTAINMENTSThe* 'initialI primajry reactor containmnent that 2. Prestressed Concrete Containmnent ' KIncorpotates a, n1ew Or. tinusu-al' design. feature. is ,'*. .-cwnsidered 'to ýbe-- Sa Apoo~p cItimn eph A petrfCSessd Concrecte prInary, I eacto"cw~'ininW2xdinples ol dcslan features t-hat at thris date wouldbe wtgoud iugote tnosCOnsidered to be ,indicatv f- a~ protlotyp -otinnn pr tp if it is th 1 is deig to ,icopoaf,aie given echnv tefaue eo ..j.a. :A fnumber ot'butres'ses oth' iI th ansxConvntlnalRehiforced6ncie e.Con ainmett...A %CnveffioiW: ced.C .Ct me b,:::ny uutitresses~inAthe domne.c.Apattern ofI'-; Indons other th an- vellctjI'.Aconcrete primary- reactor containment is. considered a tedosndhop. tenrdons in, the v,- all ,anrid three grOUPtprototype it. it, is. th~e first designý t6oincorp6rate any f oedn oreted at60in the domeciie olloing eatues:d.. A petiesd dome jCih Ssapa- Adrniew:ith a shape other .than hemnispherical; ellipsoi , al'ont top .* ,.b npeniinglarger than -0.2D:% e.: A: base. ote itha aco~ninl~ritiesw woi in th a *diartee greaiter. than: fat slab;0i5Dha~ae eprte b aisanels thian4--?D: f. A genieral containment shiape dIfIerell;ytanl iAU X connection of the cyliid~ricalwl to the vertical cylinder ý.,bott~om s~ab:or to the dome by a;sliding joint. a hinge, or g. In diVidual tendons wAith uiltim-ateC st'reng01":a: comnbination~of hinige and sliding join t; greatert tan 500 tons;e. A patern.of min reinorcing oher tha h. An oening.lager.tha 0:1D : .......................................................................................................................................vertical. stirdightb ars arid horizont al hoops; iL Two iopenrings, with `a diamneter, giejeýtAn .'AriLiter~mediate interior floor connected. to the .0.1S searte by adisic less' thain 0;,,wall or jý A, co0nnection.'f the.ribvlidn~jl- wak l..t.e-. nyoher structural. design. feature thtma oto slab or to th top dom by aoliin ld':ecre~ase'tAhei saifety margins..from those of a containment hinge, or. acmbiaino ig n ldn ocOnf irmed -by an- acceptance test. k.Anntreie trorforcneedothwall;:or ,1.Any: other str'uctural design' featr thati' mi a3] .D interna[. diameter of the. cylindrical part of the decrease the sfet-y mnarginsff(n. f o. thatT of a. contalfmnencontainrnfen:. confirmed-by an acceptan eiest.t~T................ .<....:.: .. .. .-..-let~tjre-.l~h .t. .w.. ..-.. ....-..i.. ._g.oued.. ........i .........-ns- c9 -'4. -i~i~ : ...-4, " ' ... .-: !;!- .--I ,F::2 ii ef~i fM e nf r ed

• o cr t :C n tai m n t.. .... ..,..... -...: ........ .-. :,-............