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 iz*z.:*.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 chos*een t*o

%

providc!h*rSuflicienJC

idta) .

ýwih regafd tjo. the. initial structural..i. acceptance test, point foi the aluation..

o the acontainmýintis:i.esp*n *.,

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

.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.

• ",.

..

.

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.;i*

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c-:.

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.: :* .

.. ". .

,

.

ircumference to est, r th e

!,o*

tai e nli S,cr )less u ae in t m il...o .

Reactor.Sate.uards has been consulted concerning this circum..Pence t

o. determine the c

in tensile

.:.. *..irde i*i 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 hig

h. stress u

t.:<conrifair.thie designer's tressi analysis.,

.. .. : .iet.tn e fors a.guide water-cooed n s

fBecause thestrain tmeasurements canb-*epr* 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"ii nuclear* power 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 relea;*siefromi the. reactor coolanit. pressuie T11v tile

• *.l". . .

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

t*at

'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

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no. Th

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.

dernnsrotestyp L

cooan m

ns .

"r e by

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loadino The ~tet demontratesthati: when the

.unusualidesien~uco.e ofrmdytss:sdsusdi

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.

..:n :is

,s

i:i .a.i~ l: g :i tn batieetoo-di*ac 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

4

1. indcting

hie:dint*.:...-

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

• iri 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 t*o 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 f.cea*" ;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 a*b' at a distance medstir*ed :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 beenio:*rrelat*de 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 ma

y. 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, aCtm*icsperic -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 su*f§ficientl*yiiiy '.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 defl**tion 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 .ne-*:loweri pre*sure level the entire :test sequence...sh6_uld .b*.e*..repeated."Sign.ificart*

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 *ip f6n"6 (!tlhT;ioas

_;.**@

t acetet`

a a dscripion: of te :proposed ;acceptnef----

b.

lthe.i.:nu: mericM values o*f

.tihe predictied response.-..

of the': struc-ft1utre

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

c ~

~

1 th olrn es obpermitted on theý predicted res§ponse..in.. thie' acceptance-test, and

.'d,

!the basesoni*cicli- 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-' *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.

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

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F2~

F

F7F

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F~

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F~F~'F

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F

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FF4 F

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F

F

~F

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IF' F

F

Ft FtFF

Ft F

F

F4 I

F

F:IGU RE B

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

.Deflections: radial and tangential -:too e contaiidn*ent. .. ali shoudld -1 measur d*~t-,*ach:oftihe-twelve 'p~ointsidicated.

- .

Se . paragraph C.3.

LARGE

O.PEIGN

CONT.:

I

N,. t

!*AR:GEST:O.;EING'.!JN,:IC

NTAIN:ME:NT..

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FI.GURE C

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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

0:1D

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

vertical. stirdightb ars arid horizont al hoops;

iL Two iopenrings, with `a diamneter, giejeýt An

.'AriLiter~mediate interior floor connecte

d. 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.

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

.

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

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

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