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~

I 4v. U.S. TO I ENERGY COMMISSION

• REULATORY, GIDE,.0s DIRECTORATE

OF! REGULATORY

STANDARDS R.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 oflleterna pl ildns imporillt to safe.i b es qulit snr pressure as the test proceeds and provlde a melnslol conm.esrate with the importance

..of othe safety depressurizing the contai.n'en.t it :its."i.'.spons dev.ia functio 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 piactice rfeactor, 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.ed coveted 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 ".itil out.-of-.rounldness of. the .nofiinialiý

c vlinldnic i contai .enttn..S.t.r in an ack widt s -aie eisurcd .od..B. -DISCUSSION%

crack patterns :arc rectrdd tloaton f reice high.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 " tests boundar as fined in § 50.2(v) of 10 CFR Part 50. p an 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 the be dischargzed from-the reactor coolant systern into the dirumTereports used atse *u"cirea d ite to i!!!:' w ll le allat .... g, ......f'll, ..primary reactor conitainment%

during a loss ofcoolant evlaeaysgien eeirto f thsruue accident -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.ri containmsens are adequate to wrthsianctd sch pressure 2 prt 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 iv co : 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 Transoortarion

3: Psiels anFaeil acilit ies. I Oc~cuoatrnarl He, 11i Pale 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

• t aterw nte.ic5

• a ria u su andePlanT-Protectin ne r .al C., REGULATORY

POS1ITION.

1.(nufete~

pirimlary rea~ctor :ddntifininent\

should be subjected lt) an JUCeptfc ieý,ihx ineses the Pontaimn ainernal pressure nlu imr approxijmate y equal pre~ssure

iiicreinents fr omT atopeic pressure to. at least: 1.15 times, the Lcon ,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 atumosphieni p~ressure-s ,and atec rsuelvlof thpe pressurization aind decpressfirjation

6c Lies. At each level, the pressure should-belhcld cons~tant to r at least one hour before,-the detflee lions;'and'

strains are recorded.

Crack patterns Should bc ricorded at -atmospheric pressur~e both before and. mirmediatel..

alter. the test. and at the maximumn PrCSSUrTC

I tel achket-d during the test.SoJ. thiat a complete -pictuie of the containments overAll d~edý,on pattern can be determined, the radial de--fin'S, of tile Containment should be measured at Se~erial points along six meridians spaced around. the containmne nta. including locations with varying stiffness Jiaracereisties suh: ais- buttress.

wvall. large opc~ning4 ar.ý_coflflct ions. with otlher structures.

Vertical:

deflections of the containment should be measured, at' thle. apex :and the springline of the dome.Fomr c-vlifdrmal- containments.

these points should be located as shownil on Figure A. For cone-cylinder cont -ainments, these points should be located as shown on: Figure B3.o Thle! radial and tangential deflections of the Con~tamnm;

iedt iI0adjacent to the largest opening should be mneas .ýure a t, twelve pointis as sho~wn o n Figure C. I f the second largest opening i-s structurally loaded in a diflerent .mann'er fromn the largest opening, similar mea~surmients- should be made. The measurement.

points La etre or relocated for openings with different confiour ati~ons. taking into account the distribution of slreswes and: deformations anticipatedinteprcur

4. The pattern tj- cracks that exceed 0.01 inch in width befre.during.

or after the test should.be mlapped nea th -bse all intersecution, at midheight of the wall, at the ý'pringline of sthe domne. around the largest opening." 'and around- the :second .largest opening. if struciurally:

16a'ted' in ai different::manner from the lietopen in In.- rprestrýesse d .con tain ments. -the crack patle'rn should Al-so- be mapped at the intersection between a, buttress :anld- ýthe. wall, at the intersection between'the, top. ring girder and the wall, and on the top shel f, o th rino gýirde6r.:

At each location an area of at c ..last 4 uaehtsolbempped.

In pi OtOtv~pe containmfients only! strain measuremient~s .in te 'Concrete sufficient:

to permit a comnpleteý

e ,valuation Of* strah -distribution.

shoudA be determined at the following- loations--in the'rwaill a 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 at Ithe 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~rxm presr 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.i measurement s!ould.rbe Iade.-at a distance:

belo.w the base Plate of' one. half`:thewid.th.%

o1 thease..6.

plate at a distance

normial..tob .the w-all. from ie centerline of tfihe. tendon o:of approxi Iand one-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 test of a prototype containment.

7. Any reliable system. of displacement meters:, opti cal devices, 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 the response of the- containment.

Insideand

6utsidelof the containnment, -temp:erature.

pressure, and 40 i" humidity should be.n.oiipre d c,¢iiinýuousl dunng the test. 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:

the effects of temperature changes .onthe and strain measurements.

9. The environmental.

conditions under wlhichthe týest may 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 unexpected conditions toor below th level the entire :test sequence...sh6_uld deviations from. tIfe:. prevlouis-tesr shod he recorded.and evaluated.

11. 1f any sigfificant:

modiific.atitions:

r. tepairs -are made- -to the. contaifimen.t:..f6llowing-.Ihe.testi..~t the:test should<be repeated.12. The following informaition.-should beihcluhded in-'the Prelimina-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 predicted res§ponse..in..

thie' acceptance-test, and.'d, !the the predicted res onse an d the'tolerances were established

• -

Th.... .l.ollowng or~matiOri

huld:be.inlUded inntie:'-

d an evaluatior)

of any, devia:tio-ns.

Ji: e ffl- tet.e...results that.exceed the alowale limits)t a., a- description of. the test procedure, and the o1 thfedeviations and the need for.Lorieve.-

istirumentation:

• ad b. a cmparison of the; test measutrements With the alowa": .: 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 Girder ko 2 (R) Midheight of Cylinder-1 (R) Notes 1, 2& 3 ELEVATION NOTES: 1 .Radial* (R). and Vertical (V) deflections should be-measured at the points indicated: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 the location where-the deflection -ksmeasured.

3. Where a .non-rigid bate/wall joint -is used,. Point 1 shouldbe- at the base of the-wall.CYL .NDRI L C ONT;INMENTS-FIGURE A.

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'2 NOTES: 1l. Radial: (R) and: Vertical: (V:) deflections should be mreasured it; the 0.6ints indicated by'('R) and (V.).2. Point 1 should: be above. the base-of themall a dis'tand'ei ea' to thr~eetimes the 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 F7F I F~~ ::,i~:~F F~F~'F'F 4~F. 4 F ~FF;F ~FFF F 4 F F FF4 F ' 4 F F F ~F F IF' F F Ft FtFF Ft F F F 4 I F F:IGU RE B!iili 4: I F , "...I.F.. -.iil., : ;...." ? , .I ,-,-=:.1.* ,,": ,: .:..2 ....3.,- Fh:: ,: .. F.

• A..':; .. .. .i,,-~ ~~ ~~ .. :. F .Ft.:. 4-.. ,:: i .; :.;:.iF:j-F

FF ,.!,: , , F. : ? FF:;, .I.'TES: All'-points~should.:be located..symmetrical.lyIa.1bo.ut-theo...pe.nping..Deflections:

radial and tangential

-:too e

..ali shoudld -1 measur

'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 F F::: :; I O 'i :! F : : :::;:: ,: :; : : :.. .. ., : ...- ,! ... ..., ,; .:...:. : .. .:: :..F .. .I,: * ...jF O 9 ..., , .... FF .. F .F F ..-F .. ..

I 1ý .........C ..APPENDbIX

A-",.4 iPOOTP CONCRETE P.RIMARY R-EACTOR CONTAINMENTS

The* 'initialI

primajry reactor containmnent that 2. Prestressed Concrete Containmnent

' K Incorpotates a, n1ew Or. tinusu-al'

design. feature. is ,'*. .-cwnsidered

'to ýbe-- Sa Apoo~p cItimn eph A petrfCSessd Concrecte prInary, I eacto"cw~'ininW

2xdinples ol dcslan features t-hat at thris date wouldbe wtgoud iugote tnos COnsidered 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 ansx ConvntlnalRehiforced6ncie 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 grOUPt prototype it. it, is. th~e first designý t6oincorp6rate any f oedn oreted at60in the domeci ie olloing eatues:d..

A petiesd dome jCih Ssap a- Adrniew:ith a shape other .than hemnispherical;

ellipsoi , al'ont top .* ,.b npeniinglarger than -0.2D:% e.: A: base. ote itha aco~ninl~ritie sw woi in th a *diartee greaiter.

than: fat slab;0i5Dha~ae eprte b aisanels thian4--?D:

f. A genieral containment shiape dIfIerell;ytanl i AU 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: 1 D : .......................................................................................................................................

vertical.

stirdightb ars arid horizont al hoops; iL Two iopenrings, with `a diamneter, giejeýt An .'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 l d':ecre~ase'tAhei saifety margins..from those of a containment hinge, or. acmbiaino ig n ldn o cOnf irmed -by an- acceptance test. k.Anntreie trorforcneedoth wall;:or , 1.Any: other str'uctural design' featr thati' mi a 3] .D interna[.

diameter of the. cylindrical part of the decrease the sfet-y mnarginsff(n.

f o. thatT of a. contalfmnen containrnfen:.

confirmed-by an acceptan eiest.t~T................

.<....:.: .. .. .-

..-let~tjre-.l~h .t. .w.. ..-.. ....-..i.. ._g.oued..

........i .........-ns- c 9 -'4. -i~i~ : ...-4, " ' ... .-: !;!- .--I ,F::2 ii ef~i fM e nf r ed

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