~

R6vblon 2 U.S. NUCLEAR REGULATORY COMMISSION May I=

REGULATORY GUIDE OFFICE OF NUCLEAR REGULATORY RESEARCH

REQULATORY GUIDE 1.99 nmsk ME 50541

RADIATION EMBRITTLEMENT OF REAm'OR VESSEL M A E R I A U

~ e n c dIksipCrittrioa31, "Fc9ctm~RtvcDtwaofRencrar Coolant Rrssurr:Baradary." QC Apperdir A, " C k d Qaign Criteriafor Nwlwhwa Plants," to 10CFR Part50, "'m Licensing ofhoductim md U f i l h h Fdt ic s ," raguirtS,in

that Xbc rmdor -laat pressure bOundary bt dcsigd with mfikicnt ma- to emm &at, wbm SITS& undu-, rIuimmm, Itsting. and ptda ted d m coaditim. (1) the bouadsy W v t s inImbritde mmer and (2) thepmbabfity of rapidly m a ! i n g framfr aaOre is ' " 1, Gareral Design C ~ 3 1 ~ 9 0 ~ 0 q ~ l ~ t h a f t b E d w i g n r t £ I ~ ~ M e a t a i n ~ in.ddcmhbg the effats of irradiation on t n a k d pmpcnits. hppenaix G,"FniclKrc T o o m Raquirtmwo," aad hppcndix H."Rcacrar VessdMataial !hwdhmx ~~. .I

Hhichhplemtnt, in part, Crittriw 31 , neesitate tbc calculaGm ' o f ~ ~ ~ i n ~ m g h a a s a f r e a ~ f 0 ~ ~ ~ 1 m a t c r i a l s ~

b y ~ r a d i a r i m ~ t S l e r c r v i c c l i f G . ~ g u i d e ~ g a d m r c s aac@Ie m the NRCstafffw calculatingh

1 ofm n -tion mbri~~cmcntof thc towalloy amnt ly used fur Light-watcr-cm1Ed mactor vekscIs.

The.calculativtproctrfarrsgivcnin~Position1.lof dGsguidcaremtltbcsxmastbmgivcnintheR. ' dlbtrmal shock rule (4 50.61, "Fracture Tougkws bpkmmts Fwb oxtion Against F k w m k d ThEtmal Shock Evcnu." of 10 CFR P a n 5 0 ) f o r ~ t h g R T p ~ s , r h e r c f c ~ t t D l p c r a t u r r t h a t i s tobcomtparodrothcsmc&q~mgiwnin thenht .% i n f o d o ncm which this Revision 2 is bitzed may dso rffect thc basis fortht STS de. Thc gaff is presEntly mmi&ring whet& mpropwcachBngFm 4 SO.61.

%Advisory CommitteeonRwaorSsTeguardsbasbecnrpn-dtd conctmingthis gui& and Iwc m m d in lhregukmry position,

Aoy-' '*&*

grddear~~a~s~raqtl imtletlgin10CFRPartX),whichp-cm vidts tkrcgulMorybaris for tihis guide. Tbt i n f d n cofia-

~roquiranclrtsin1 0 C F R P l r t 5 0 h ~ M M d E C O M B Cl- No. 3150.0011.

1. ~ a r a g r r r p b ~ . ~ a l - ~ m p i r = k d f & a f m ~ t o b e ~ ~ t h e ~ u f ' ~ *W~.ThiPgui&~Sdessu&~intheIormofd&~ p- tbat are accqmb~cta the NRc.

2 . P l t a 9 r s p h V . B o f ~ C t ~ t b e ~ i ~ r ~ tbe~limitEor~a$s..irmcrionftcmperaam.dnring ~ p m d o o a l d o w n f m a g i v t a ~ p a i o d i n ~ a f ~ ~ c P o d n I u t o f t h e a d ~ r r f f f a r e c t c m p e t ; r t u r t a t ~ a d of the d c e period.

USNRC REQUIATORYGUIDES

R o P u t t o n G u W m bu8d to aecrlb and rnrM.wallabla to th* PubllC math- IcEePtable to tm NRC Hall of imnler(rmtlnpSDecllk prm of t t ~Cornmtalon's mgulatlen& to dollnoat* tub n1ques usod ~y thm +taw In mvrlua:lng rpscEnr roblemr or putu-bted ucldenta or to provide- gutdancs ta ap&nU. RegulatorGuldas arm nof subrtltwtsr for rsgulatlons. and cornpllrrncm wit[thorn k not nqulmd. Methoar and rolurtonr arflrrrsnt Worn thore sat out In the pukd~swlvlll be acfeptrats It the provlde r brsls for thr flndlngs r.quirlta to t~ brumncs or cmnfiouancc of a pennit or/ ICczme By the Cornmuion.

Thls guWa war L r w d attareomldmrstfon of comrmnts ncatwd hum tM p u b l l ~Comments and ~ u g p a r t l r n s'1mImprmnmnts In these

:"L%b,"1:?.'2%'%d, S*:! ~ 2 % ~ ~ m , P d " l , d ! c . $ ! ? a Z2,dEt k n or *x&tienca

1. Mwrr Flncton 6. &MU& 2 Rsssswh and Test ffarctan 7 YranrWrtatlon 3: ~ u o t sand ~ i t e r l a i sF ~ C I E I ~ J ~ SII:Ocwwtlonad ~ s r l t h4. EnwIrenrmnuland Sltlnq 9. Antitrust and Fliurrlal RCv)ow5. Matorh1sand Plant Prot.ctlon 10. Canera1

cop~arof W ~ AWM= m y be m u r a from tm ~wom-tPrlntlnp Qttkt at t h a cumnt &prlcs Informatlar on armnt G W urlwr may PC mtelned by contactln the 5uDarlntaMtmt olDPtummnts, "3. Government Prlntlm ci%~co, Post O f W Box 3f082, Washlngtan, DC 20013-7012, telephone (202)27bZV6D or (2023215-2171.

issued guldor ma a h be wrchmad f r m i tk. Mtlonrl Tlchnlul Infmmmtlon %nLon dandlnp ordor bask, Datiilk on thb r e r w l a may m abtslnaa by vrlrtng NflS, 8215 Rort Row1 Road, 5ntInaf~!a.VA 22161.

T h s t w o ~ b r a d i a c i m d ~ t m m t u s e d i n ~ g o i d s ate~ from~tesu l tao l thcC!haqyV-nc4ch imp; lc t t t s t . AppeodirrGto 10CFRPart50rcquhUntrfunaweofabsorbtd coergy vcrsfls beobtainrd thcough thr?ducliIeb-bristle m i t i o n kmpmiue region. Tho adjustment of the refmemu tempam,A R ~ T , as tht rtmpeta-ia defined inApptndix 0 mrc shift mth 1[Sharpy m e for the indated material teMve to thatforthouahdiatcd materialnmsmdat the 3Gfooc-pud

level, aad thtdata that f d !he bash for thisgui& wem XLfwt-powi sbiA values. The s m d measure of radiatiom

0 0 ~ * 1 d a i v t d ~ I R e f . 2 ) a m 2 8 9 P f o r ~ a n d1 7 7 f v r b a s e m a a l d e r p i t c ~ ~ e ~ t a ~ a m o d d f h a t ~ ~ f i ~ g u r w . ' f $ u r ~ u s e o f m u v t J f a n c a d a u ~ a g i v t o r t a d a r ( i n p h o f t h e ~ d p r o c x b m g i ~ ~ ~ ~ g n i d e ) roquircs~ ! e e n g i n c a i n g j u d ~ r a e v a h t a t a t h e c r e d i b ~ -iyof tbdataad assign rmiiablo margina. WhEa st.wdllaPadata from the rmdar in quation bacrnnt av&Ie, the weigh givcp 1

I ~othmrthiyttothei n f o d o n inthisgnidawill dcptndonh a d E M y of dm mill- data as judged by the f o W g criteria:

c m b a m m t L b d # r t a s t m h ~ ~ - M ~ l e v d , which is&find inASTM g 185-82.m 1. Mat#$lrhrhe~asbouldbetboss juUged~l ikc ly &vision 2 updatw the caldtiw @USW for thaad- ofrefaff#rtmpahire; tobwmIling with qardtorsdiablonembrialemmtacoording however, dadat ive for ib dacrease h upper-shclf to brccmmcndation~of tbh guide. m x g y ~ u a ~ h a n g o d ~ ~ ~ t o t y w o r k h a d n o t ~ comp1dcdiptimttoincIlrdotheminthistevision. 2 .Scat ter ie theplQa0fCtrarpy~~tappa;rmtefor

ths~aadltIih&&cwditio~sbouldbo~maaeormgh , topenait the dckmimimof tht 3U-iwt-pmd t e m p t m andi a c t d s f o ~ ~ m 2 f D f b R ~ ~ ( i a R e g u i a o w y ~

1.1d t h i r l @ c ) i s a m F d i n t d i n ~ k y G . L.GPhteWf- u m--guously. 2) and G. R. Odeps d al. (Ref. 3). Bmh of tbcsc papen used s r w e ~ & m f r o r n ~ p w e r ~ . T h c b a s afor M u r e p d m rwrtIationr w d difftm in that Odetto mad= pcata useof physical mdchof embritdem~nt.Yet, thcr twopapersoontainsimilar tiom: (11 s e p m m mmk-t i o o ~ s h m k l b c ~ f w w e l d a n d b a s e m t z a I , ( 2 ) t h t f u n c -~ s i r o u l d b e t b e p d ~ o f a c h e m i s t r y k m d a f l ~ ~ , ( 3 ) t h e p a r a m t c n h t h e ~ f h a r ~ b e t h t d ~ c o p p c r a n d n i c k d , d ( 4 ) ~ ~ m w w ~ d p r o v i d e a d u u v t dopa of abut 0.25 to0.30 oa log-log paper at IOH d d (E >1MeV), st#ptt at low flue- a d flatter high f l m . Regulatory PDaition 1.1 i a a blend of the m ~ r ~ftmcciom p r e s e n t e d ~ t b e s e ~ . S o m a m t ~ d a t a w m u s c d a a agui&ia~lishhgaEuto&forthschtmisoryfadorforJcw-~oppermatcriab.ThebbaseforRt*Posi~rnl.ZhU givm by S p t a ~ e tH.fhrsh (Ref. 4).

Themtasrrrsof&leoeeudiafhirguideithsmnnberof

4 . ' I h s l r r a d i a a i o n t e m p c r a t U r e 0 ~ t h s ~ ~ h t b t ~ ~ m c b v e g s c l w a l l t e m p c r a t l l l t a t t b e ~ ~. metal iriterfaeewithia fSOP. 1

m b m m p a ~ ~ k v t n $ e n e r g i t s ~ h 1 m i l I i o a t lmmnvdm(E>1 MeV). Thcdiffcrmaah m s p t m a t T o r r s s ~ ~ d a t a f m m a ~ p ~ i n s t e a d d t h t ~ e i l I a a # ~ t d t $ e v d k s r v f a c e I ~ n r d bR t ~ P w i t i o n I , o r r ; m d m l o p . ~ ~ o f b R ~ wrapptartobaw-&towarrardthewofadamagsb tofllmmforthgtplant.B#-ause&danamlimitedinnumbtr tioa suchasdispl-ta per atom (dpa)OM.5)intbe anatysh and-wbjecttoa~atta,R t g u b q Position2 dcscdm a pwxhe o f ~ ~ e ~ d a c P b a s c ( R e f . 6 ) . i n w h i c h t h e f o r m o f ~ Z i r t o b e ~ a 8 d t b o n u t a c l e h G -.

t o r t b t & i s ~ , h t r h s ~ f a c t o r S r ~ e d b y tbplantsumiEIarrzdah.OfsevtralpmSbh~raJ&sncb&a,

w i t b l ~ i n t k v d w a 2 1 ; h e ~ f o r c a l ~ g t h r ; ~ ~ , m s a a ~ m n - ~ d a c r ~ p i ~

t h s m e t h o d t b a t ~ t h s a r m s ~ f t h t ~ o f t h o e m n r h a of mdktian cmbcinlcment thrmgh tha w s d wall, it is was chwnwmtwhatarbikady. ha use hjustifiEdh p a t by the ~ t O u s t ~ d a m a g t ~ b o d e t a m i n t b R ~ ~ ~ ~faaLhat'LI~squares"Lawmnmmctbodforcurvcfiuing.

A h ,when& arconly~dappoint*,hl rast -mdd tion atthir timr:k dpa, and the attnmation f o ~ ~ 3 ) r a d i a l ~ ~ r b e W a n . T b e m a ~ ~ d a m a ~ f u w

g i v e s ~ P r e j g h t t o t h e p o i d w i r h t b a h l g h t t A R ~ ~ ; t h i f g i v a r i n R t ~ t o y ~ o n 1 . 1irbascsontheattmwionofdpa w m l l a b l s for sruvdlIanee dam, b119t g M y Zhrough thtvtssel w d . b h i g h a d a t r p o i t n w i l l b e ~ m a r e ~ a n d ~ w i n ~

smt mre madm pTmd lm. ~ y t o n m m n r a d E s d a a ~ ~ e m w r m a y b s a & a t d

~ e l ~ o t h e r ~ w p p a a n d n i c k d . T b o r i g i n a l ~ s w l R n i s i o n I o f ~ ~ h a d a p ~ s p ~ t e r m i a t h s ~ W,b u t t k ~ h J d i r * u u ~ h i c h t h i a ~ ~ b a s c dfoudothtr 1. m-Cg DATA NUT AY-elmem srrchaa p b o s p b tobedsmmday importana, 1.0,~ including the^ in the d y s h did not product a 8 i g d h n t fy &-tcrtitofthsdats.

~ ~ O f b R ~ ~ ~

~ R T ~ I s t b c r r f e r # l o e ~ f m d = m J r t a d i a S a d mamid u;& h e d h P-h NB-2331 ofM o o El of the M M E B c i l r r m d ~ Y c s x IC o d e ~ , 7 ) . I f ~ ~ ofinidalR~forthematcriBZin@cwue~r~blt, ~meanrahrtsforthatclassSofmatcrialmaykosrdifthcrt u e ~ t ~ s t ~ t u t s ~ a M I s h * i ~ c a a m d E t a a d a r d ~ -tim for the dass.

CE(~isIlftt&dsmy~,afUOCtiOaotcopptfmddclrel m.CFEFgivaInTfble 1forwddslaa hTablc2 forbart d @ l a t e s m d f a g i n e s ) . ~ ~ i p o ~ i s p e r m i r r t d . h Trbler I rad 2 '"tpereent ~appcr" md "weighl-pcW ~ l r t l "rrt tbck b d m a r c vllw for the mated, which wiu ~ b t t h e m c a n o f t h e ~ ~ f O T a p l a t t o r f o r g h g wfurrvcIdmmp~mdewith~wCldwireheafmrmberthat ~ I & S the Qitical rtSSelweld. Ifmehvllus m availabIc,

2. SURVEfLUNCE DATA AVAfZABtE

Tbcadjasttdrtterca#tcqmmlhotrldk*rs fallows. Fi* if* isclear- dmtthcopperoruickl m r m t O f t b G ~ . r t l d ~ a r s ~ ~ O f t b t w s s t l w t l d , i.e., differs h m bz avargt for the wdd wirt h mtmber rssoeiated with th nssel weld ad zbt m m e weld, ttre

vahm d b R T ' ~ I b 0 U l dbe adjwtd by d t i p l y h g them by the d o oftbc ~ckdshym r for.thevessel weld to that for the ~~weld. M,lhesurvtillanetdatarhoald be f i ~ ~ ~ ~ ~ 2 ~ o o b t a i n ~ ~ e ~ flucaoe. Todo lo,dcutate theCMSJ'€am,CF,€urltbt btst f i t by driplying cach adjusted b R m by icr mnaponaing f l u ~ ~ r , N m m i n g t h e p r d u m , a d d i v i & g b y e b e s u r n d kqmaofthcfluzn#f8nws,llcrdtingvPhrtofCFahen c n ~ I n ~ o n 2 w r i l l g i v t ~ r d a t i o n s h i p o f d R ~ t b

TABLE I

CHWWIRY FACTOR FOR WELDS, eP

I f r a k ~ g i v a a b i g h # v a l t l e o f a d j u s d r e f ~ ttmpcraht~tthaathafgiv~pbyuslaptheproeodrutadkgnlatorg Pasicioa 1 , 1 , $ l c s l r r v t i l ~ d a n ~ b s u s e d . I f ~ ~ gives a Iowa value, dm may bt used.

wt-

ForMtiintmaltriatintbereadorvensclfor.~ewpknt,tk . m t ~ a f t b i s ~ L 0 1 p r o v l d e i n F a m a t i a z b ~ e d ~ e ~ t d l i ~ r r g a r d i n g t h t N R C r m f f ~ p ~ f o r ~ t h i sof rtgidrralctcmcnt~mch as ~opper,pb@mus, rulfur, md d . d d b e - n b d t o b w l e v t l s . = T f i c ~ - ~ g l l i d e . ~ ~ H ~ ~ ~ w s i n w b t c h m q p ~ p m t d ~ ~ r u c h ~ t b c ~ r d j u s t e d r e ~ ~~ m ~ l e ~ ~ f o r w n q , ~ w i t h r p s i f i c d -.atthtl14Tpos~mintbevcsstlwallatndoftiftLIwtban momof tbtCommission"&rtgulatjom, the mttbDdsM b c d m ° F . In tclcaing the upfbwnmount of nickel t~ be ItKd, its h ~ ~ ~ k u s e d * s f o l l o w a : dcluuious effa w W o n tmbritilemem r b d d be W a n d dgainstb~beneficialmaalhugieat~cctsdiDteadcacytoloaa 1. ~ ~ d e s c n W i n R g u l a t o r y ~ 1 m d 2 o f tac initial R m . &i~grridewillbeastdbytfitNRCCFdffhevaluatingdlpdit-

t ias of &on cmbrW- needed m implemtm7 = m m a e b d h ~ u . & m ~ . e c * ~ P A S I 1 1 1 ~ ~ A s J 3

(RFt. BE. CI mdH m 10CFR Part 50.

REFERENCES

I. A m a i e a a S o c i a y E w f ~ d ~ m ' T b d d b5. A m e r l E m ~ f ~ T s t f a g ~ ~ , " ~ ~ tLx for Muct ingSmdhce T w lor --Warn Coated ~ f o r ~ H ~ ~ f a F a t i t i e S m c l s h P I ~ ~ ~ V d , " ~ E E 1 8 5 8 2 , J d y l ~ . * #lM E693-79,Turnsof--gcrAaPm@PA),"

An@ IQf9.e

7 . ~ ~ o t M - ~ , - m m3. Q . R ~ a d . , " P l f y d e a n y W k g r e s h t h r e M m-,*' l k tFowtr"'Nlrdrar ef ASRE iBdlrr d

SamiZIaDcc Prognms,'" P ~ o w r ~M bthtc, Prunvt V a t ! Cadc. N m York ( u p l a d -).v NP-3319, Jaauat)r 1984.t

8. Axmbn tor Tmhg a d -, "'B S ~ f o r ~ V e e s c l P l a t e s , A U o y S t s e l , ~

4. S. H.Bulh, " S M ~ i o r N u d c a r k m m ~ , " lad Tzrrrptrod, Mangaatsc-MolyWmnm d i n J w r m a i q f ~ ~ ~ c m d ~ , A m e r t c a n S o c i e t y l b r M d w - N i i , " ASlM A S3Uh 533M42,Scptcmbir Testing dM n W , N o v h 1974.. 1382.'

of Embri#lemeat Data h m Reamor Rusprr V d

REGULATORYANALYSIS