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 are wit hi~n acce~pt able limits.

Generat Criterion]:. -Quality Standards:esiaI and,  : .

ng thle test. the con tait menI is prssu iz*z.:*.t :

.o0,.a0Geairi 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 safety depressurizing othe the contai.n'en.t it:its."i.'.spons dev.ia functio oh etre.Thsgiedsrbsa significantly from the expected rcsponse..The numbci t)

• ",.

.. . aciep

' :: ... ",le .;i* ',mehd h ' ot. . implementing

.: :* . ..thi".

s r..equirement

, . c-:. ircumference

Pressure increments to est, r e isthchos*een tai

!,o*

%

t*o e nli S,cr)lessinu ae providc!h*rSuflicienJC t m il...o.

idta) .

ýwih regafd tjo. the. initial structural..i.acceptance test, point foi the aluation.. o acontainmýintis:i.esp*n 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 conta.niie*nic** iii. within acceptable limits are not The .. ial and .d.vrtical o:.ihc p.i s:,,ciii.ed

.de.flections coveted by this. guide. The Advisory Committee on~ contain~ment -aie measuired at several locations aiocind-its.

..wi ohirinea qd:-t : hea ud *i nitaia .sttru a.. a t~er-acootedt for s o .teev laln .:..n .o ,h... o t m e !:.rep n e ....

Reactor.Sate.uards has been consulted concerning this circum..Pence to.determine the c in tensile

.:.. *..irde i*i has, concurrde i d n the reoulatory position. stresses including those due to.p ":s :ih ".itil out.-of-.rounldness of. the . nofiinialiý cvlinldnic i contai .enttn..S.t.rin an ackwidt s -aie eisurcd.od g,f'll, ...... ..

B. DISCUSSION

%

....allat crack patterns :arc rectrdd tloaton f reice i!!!:' w llle

.. -

high.stress u t.:<conrifair.thie designer's tressianalysis.,

.. .. : .iet.tn e water-cooedn fors a.guide s fBecause thestrain tmeasurements canb-*epr* lie r ted 1,

..

. ia"e aii fao eeprmdeflection measurementsobtained.inprvioses"ii n Plant is the. structure or Vessel -that Min ed " tests nuclear* power boundar as fined in § 50.2(v) of 10 CFR Part 50. p Iid ser-.es as a l.e kagee-limiting barrier to radioeactive an nonprototype Containments.

materials relea;*siefromi the. reactor coolanit. pressuie T11v tile Approrie ate mdisurep t a ed Iti0 cn lirm the

• *.l". . . ndar , T h e s ui -i. the reactor coolant that might be . dischargzed from-the reactor coolant systern into the dirumTereports used

• u"cirea atse ited to

• .!:::.:ii

. ".. . ..... Th .. . .

n

o. dernnsrotestyp

. . . L m eeirtocooan ns . "r e.f by::"."":...thsruue si...!.4

..i.1...! .i {:!

• .. ..:nprimary:is ,sreactor :i:i

. .a.i~ l: g :i tnduring conitainment% a loss ofcoolant batieetoo-di*ac iv evlaeaysgien accident -would Cause a significoaon*t.pressureload on then"l. .-

containmt An test is commkonly used toTi enent.

dsaesn Sanptance r r iii 1 .

-confirm

• t*at 'ther desigp and configuration :of :the iticableasurementcdbmt ica' um.r..;.t.ri containmsensare adequate to wrthsianctd sch pressure prt2 ye cnt e " iiu.lImori{:ii now "w The ~tet demontratesthati: when the loadino .unusualidesien~uco.e ofrmdytss:sdsusdi 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 hie:dint*.:...-

e:ired to te U Atomic Energy CommiissionW go n De. >2OM-.':

Re--aor u r i&6e des to decie and rishea valal to the public Attention. Director' olf% eguliatory Standards. Commrrentsand 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 used by the siaff in iAtfomnitc techniques uComm1ission 0f ithetComm.aissior.. U.Sa Eneesrgy .... s ington- o .C 205,

.  :.:

__ _ evaiuatnr. specific trobie..s or p.etul." e d accide.ntsior tompovide guidance to Attent Chief ublic eProceedings Staff:

RguatryGuides are no, substitutes foreul acprcar tin and conpliance

-1rh' thm irtr, seiredMethods and oltnsdifferent from those set out in The guides are issuedin the follow~in~g tienbroiad divýisions .

W~~~~~~~~1 lco onnac faDmrnn

-s or i~celnse byit-e commission. 1. PowerReat .BPou

.2. Research and Test Reactors 7 Transoortarion

3: PsielsanFaeil acilit ies. I Oc~cuoatrnarl He, 11i Pale ar l ai E A.-ronniosr e i siting ah*iri ata ind 9 Antitu reutli ,

. 'ciing

. . i-,q to r.es.':t.nw

inei om ono te

• t aterw nte.ic5

• u a su ria andePlanT-Protectin t*o ne r .al

C., REGULATORY POS1ITION. b. at ýthe la rgest opernin, prxmtly 0.St -fr~orn ,

theredge of the ,openin jbength

, ta thcness at

1.(nufete~ pirimlary rea~ctor :ddntifininent\ should be Ithe edge: of thieopemihg). anid, subjected lt) an JUCeptfc ieý,ihx ineses the ainernal pressure nlu imr

• jnt the level of theý springline~of thedoeo.,

c.at a.p~rxm Pontaimn .one mieridian ."-

approxijmate y equal pre~ssure ::iiicreinents fr omT

atopeic pressure to. at least: 1.15 times, the 4lhese measurements should be, hd avth re~e-'.

Lcon,t.ai%n:n.i.en.tdesiiunrpr.essu,re. The conrtainment shoul"'d -b.e. positions:within.the wall, i.e., ne, he' nside.rf.cea*" . ;the.:

midpon ad nefTeoutside face. In a prototyýpe.

depiess-uný.!Zed 'in' -the. same numnber of inc.rements.

Measuremens, sI should. be recorded: at atumosphieni presr containment theo `t-rtic, hioii:,.riio.ta a and/fd:.

p~ressure-s ,and atec rsuelvlof thpe pressurization shear..:strainrs in theconcret.shou.d.ndb....niesured .

aind decpressfirjation 6c Lies. At each level, the pressure one "restressin- anctior 0.o a vertical t4ndon Th.i should-belhcld cons~tant to r at least one hour before,-the measurement s!ould.rbe Iade.-at a distance: belo.w the detflee lions;'and' strains are recorded. Crack patterns base Plate of' one. half`:thewid.th.%o1 thease..6. plate a*b' at Should bc ricorded at -atmospheric pressur~e both before a distance medstir*ed :normial..tob .the w-all. from ie centerline of tfihe. tendon o:of approxi * Iand and. mirmediatel.. alter. the test. and at the maximumn PrCSSUrTC I tel achket-d during the test. one-half tendon duct dianmetes'. - .

6. In. noniprototype conitiainmients.str~ain measiuirneients:!

SoJ. thiat a complete -pictuie of the containments need not be nmadeif st:raia:ný leve's haive beenio:*rrelat*de overAll d~edý,on pattern can be determined, the radial with deflection measurements during the acceptaance test de--fin'S, of tile Containment should be measured at of a prototype containment.

Se~erial points along six meridians spaced around. the containmne nta. including locations with varying stiffness 7. Any reliable system. of displacement meters:, opti cal Jiaracereisties suh: ais- buttress. wvall. large opc~ning4 ar.ý_ devices, strain gauges. or other suitable apparatus may.bbe -

coflflct ions. with otlher structures. used. for the measurements.. .- --...

Vertical: deflections of the containment should be 8. The environmentalconditi6ns.. diuiingihe test should'

measured, at' thle. apex :and the springline of the dome. be measured in such-* mamhner * s'id.o"such-an.extent'that-------

Fomr c-vlifdrmal- containments. these points should be will permit the evaluation,:.of. their. con"tributio to "is the located as shownil on Figure A. For cone-cylinder response of the- containment. Insideand 6utsidelof the cont -ainments, these points should be located as shown containnment, aCtm*icsperic -temp:erature. pressure, and 40 i"

on: Figure B3.o humidity should be.n.oiipre d c,¢iiinýuousl dunng the test. In 'addition, theiteimp4era:tiui-eSinside and outside the-,-

Thle! radial and tangential deflections of the containment should.; be:. measured.". for su*f§ficientl*yiiiy '.ng, iq.

Con~tamnm;iedt iI0adjacent to the largest opening should periods of tinie lprior,.o t:. .test.iAoestablish anai:anierage, be mneas .ýureat, twelve pointis as sho~wn o n Figure C. If temperature of :the. wall to: 'be:'used fin -:evaluating: the the second largest opening i-s structurally loaded in a effects of temperature changes .onthe defl**tion and diflerent .mann'er fromn the largest opening, similar strain measurements.

mea~surmients- should be made. The measurement. points La etre or relocated for openings with different 9. The environmental. conditions under wlhichthe týest confiour ati~ons. taking into account the distribution of may be conducted: should be .specified.W-The test shold,.. d -

slreswes and: deformations anticipatedinteprcur 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

4. The pattern tj- cracks that exceed 0.01 inch in conditions toor below th .ne-*:loweri pre*sure level the widthbefre.during. or after the test should.be mlapped entire :test sequence...sh6_uld .b*.e*..repeated."Sign.ificart*

th -bse all intersecution, at midheight of the wall, nea at the ý'pringline of sthe domne. around the largest deviations from. tIfe:. prevlouis-tesr shod he recorded.and opening." 'and around- the :second .largest opening. if evaluated.

struciurally: 16a'ted' in ai different::manner from the 11. 1f any sigfificant: modiific.atitions: r. tepairs -are made- -

lietopen in In.- rprestrýesse d .con tain ments. -the crack to the. contaifimen.t:..f6llowing-.Ihe.testi..~t the:test should<be patle'rn should Al-so- be mapped at the intersection repeated.

between a, buttress :anld- ýthe. wall, at the intersection between'the, top. ring girder and the wall, and on the top 12. The following informaition.-should beihcluhded in-'the shel f, o th rino gýirde6r.: At each location an area of at Prelimina-ry-Saf ety "naysis Re.ort *-

.a. a d e~c *ip f6n"6 (!tlhT;ioas _;.**@

t acetet`

last c 4 uaehtsolbempped.

.. aa dscripion: of te :proposed ;acceptnef----

b. lthe.i.:nu: mericM values .tihe o*f predictied response.-..

In pi OtOtv~pe containmfients only! strain of the': struc-ft1utre

k.iwh'ic'*hwill beirmeasued*I .::

measuremient~s .in te 'Concrete sufficient: to permit a c ~ olrn ~ th1es obpermitted on theý predicted comnpleteý e ,valuation Of* strah -distribution. shoudA be res§ponse..in.. thie' acceptance-test, and determined at the following- loations--in the'rwaill .'d, !the basesoni*cicli- the predicted res onse an d a atý the top 0)1the base m~at onsone meridian. the'tolerances were established * -

Th.... or~matiOri :huld:be.inlUded inntie:'-

.l.ollowng 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-' *eýst

..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.

.NDRI

CYL L C ONT;INMENTS

-FIGUREA.

-Fl F-F', ~

Ft F. ee bo A - F2~

F F7F

I F~

55 (R V Intersection: of D me'and'FCone

Midheight1of 'Cone ~ ::,i~:~

R)

_(3 nte'rsection'o'f Cone and Cylinder F F~F~'F

~- 21(R Mhiht.ofI 4y-!iner, F

'F 4~F. 4

~FF;

-- 4-11 (R) Notes 1:and'2 F ~FFF

4F F

F

FF4 F ' 4 F

F F ~F F

IF' F F

Ft NOTES: Ft FtFF

1l. Radial: (R) and: Vertical: (V:) deflections should be mreasured it; the 0.6ints F F

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.

F4 CO"NE-.CYLINDER ..C ,"ONTAI:NMENTS I F

F:IGU RE B

!iili

4

IF ,"

F*!:i;:;:

. .. iil I.F.. -.

• ., : F-..*:.;

. . . . " "*

'*';:.',: .*- r*? , .I ,

-,-

=:.1.

• ,,": ,:.:..2 .

I.

-*ii': ... 3.

,- , Fh:: F*':

. ..

• !.-

':;

.. *

.. F* .

F. A. 'TES:

i,,-~ ~~ .. ~~

. F . *..*.

All'-points~should.:be located..symmetrical.lyIa.1bo.ut-theo...pe.nping.

F.*: *

Ft.:.

i .; -..*i:* ,:

4 .Deflections: radial and tangential -:too e contaiidn*ent. .. ali shoudld -1 FF,.!,::.;:.iF:j-F F., , : ? . FF:;, measur d*~t-,*ach:oftihe-twelve 'p~ointsidicated. - .

Se . paragraph C.3.

!*AR:GEST:O.;EING'.!JN,:IC * : '::i .. NTAIN:ME:NT..

• .

LARGE O.PEIGN CONT.:

I N,. t

. .:! *. *::....

...:: .:

FI.GURE IF

:: OA* 'iCF:! F:

F:!.i*~  : :::;:: ,:  :; : : :

• ...,. ..* 1: .':*4 . .:* F"'.

• , ..- .*, ,! . .. ... , ,; F.*

.  :...:. : :*F.. .:: * :..F F

.. . * .jF O..9 I,: * . . ., , *FF

. F... F.. .FF . .- .. * . .

I

1ý .........

C . . APPENDbIX A-",.

4iPOOTP 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-- cItimn Sa A petrfCSessd Apoo~p eph 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 th1 is ,icopoaf, deig to aie given echnv tefaue eo . .j e. A patern.of 1 min reinorcing .......................................................................................................................................

oher tha

h. :A

.a. Anfnumber oening.lager.tha ot'butres'ses oth' 0:

iI D thansx 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 jCihSsap dome a- Adrniew:ith a shape other .than hemnispherical; ellipsoi, al'onttop .* ,.

b npeniinglarger than -0.2D:% e.: A: base. ote itha aco~ninl~ritie sw inwoi th a *diartee greaiter. than: fat slab;

0i5Dha~ae eprte b aisanels thian4--?D: f. A genieral containment shiape dIfIerell;ytanl i AUconnection of the cyliid~ricalwl to the X 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; greaterttan 500 tons;

vertical. stirdightb ars arid horizont al hoops; iL Two iopenrings, with `a diamneter, giejeýt

'AriLiter~mediate

.An 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 . .. . .. ..-..

<....:.:

..-let~tjre-.l~h test. t~a*:-th~s. ._g.oued..

.- x~mp~e~i.*!::dqs~g .t. i.. .

k. Anntreie

.w.. . .-.. . . . . . i .. . trorforcneedoth

.fe**d

. . ns-. . . . .- c 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~

9 -'4. - i~i~ i*v0-p:*~

. . . " ' ... . -4, r~i* * - 't*  :*i:  :':* !;!- . - I- ,F::

• '":' *"!:.

fM *R2eii nf ef~ir ed o cr t :C n tai m n t.. . . .. . .,..... *...,. -.:.,:..,* ..: ........ . -. :,-............

T.

............... .