ML17262A045
| ML17262A045 | |
| Person / Time | |
|---|---|
| Site: | 07109309 |
| Issue date: | 09/18/2017 |
| From: | Ahn T M Renewals and Materials Branch |
| To: | Harrison J Global Nuclear Fuel - Americas |
| Garcia-Santos N | |
| Shared Package | |
| ML17262A085 | List: |
| References | |
| Download: ML17262A045 (3) | |
Text
U.S. NUCLEAR REGULATORY COMMISSION NRC F ORM 699 ** .,, ..... (03-2013) f d ,**s DATE OF SIGNATURE
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- /_! '\., .J." CONVERSATION RECORD 1/f1(UJJIJ
...... NAME OF P E RSON(S) CONTACTED OR I N CO NT ACT WITH YOU J a m es H a rri so n. e t a l. E-MAIL ADDRESS ja m es.h a r r i so n@ge.co m ORGANIZATION G l oba l N u c l ea r F u e l -A m e ri cas (GNF-A) LICENSE NU M BER(S) NA SUBJECT DOCKET NU M BER(S) 0 7 1 09 3 09 CONTROL NUMBER(S)
NA DATE OF CONTACT TYPE OF CONVERSATION 08/1 6/2 0 1 7 TELEPHONE NUMBER (9 1 0) 62 0-18 26 D E-MAIL 0 TELEPHONE D INCOMING 0 OUTGOING NON-P R O PRI ETA RY I N F O R M AT I O ---8/1 6/2 017 , 10: 00 A M CO F E R ENCE CA LL TO D I SCUSS T H E STATUS OF T H E R EV I EW OF T H E L ETTE R AUT H O R I ZAT I O R EQUEST FO R T H E M O D E L UM B ER R A J-II (CAC 0. L252 3 9)
SUMMARY
A tt en d ees: N R C Jo hn Mc Ki rga n Travi s Tate Norma Ga r c i a Sa nt os Tae A hn A n drew B a rt o Kim Yo n g Joseph B orows k y Cay l ee K e nn y Da n ie l Fo r sy th Cont i nue on Page 2 ACTION REQUIRED (IF ANY) See umm ary. C ontinue on Page 3 G NF-A Ja m es H a rri so n Ju s tin L a m y C hri s t o ph e r Kmi ec J a m es Fawce tt R o b e rt R a nd M i n e Yi l m az Br i a n E b e r Ru ss Fawce tt NAME OF PERSON DOCUMENTING CONVERSATION Nor m a Ga r c i a Sa nt os, e t a l. SIGNATURE NR C FORM 699 (03-2013)
Pag e 1 of 3 NRC FO RM 699 (03-20 1 3) U.S. NU CLEAR REGULATORY COMMISSION CONV E RSATION RECORD (continued)
SUMMARY
- (Continued from page 1) I On August 16 , 2017, NRC and G F-A parti c ip a ted on a ph o n e call t o discuss s t a tu s of the r ev i ew of th e letter a uth orization for th e Model o. R AJ-I I for transporting accident tolerant fuel (ATF) lead t est asse mb l i es (LT As), ga in a co mm o n und ersta ndin g about the licensing action requested , co mmuni ca te c hall e n ges associa ted with the revie J, a nd di sc u ss a possible path fo r ward t o continue the review of the app li cation. The fo ll owing it ems s umm ar i ze th e di sc u ss i on during the A u g u st 16 telephone ca ll. The staff sta rt e d the meetin g b y go in g ove r the main as pe c t s of the cove r l etter 1 s ubmitt e d with the app li ca ti on t o ensu r e th at th e s taff and the applicant h ad a co mm o n und e r sta ndin g of the li censi n g actions bein g requested.
The pa11icipants agreed on the fol l ow in g: I. The li ce n s in g ac ti on r e que s t co n s i s ted of up t o 16 ATF l ea d te st r ods in s id e of two G F2 fuel asse mbli es (a maximum of 8 ATF l ead test rods per asse mbl y) p e r packa ge with a maximum of tw o p ac ka ges p e r s hipm e nt. 2. The A TF rods m ay conta in Type A fissile fuel a nd the G F2 fu e l will co nt ai n previously a pp roved Type B quantity fuel. 3. The ATF w ill be transported in a Type B s hipm e nt. 4. T h e app li ca nt i s requ es ting o ne s hipm e nt per yea r from 2 017 t o 2 019. In terms of th e number of A TF asse mbli es to be s hipped p e r yea r , o n th e t o p of page 2 of the cover l et t e r , th e app li cant menti o ned that there wo uld be m ax imum of 4 A TF l ead t ests assemblies per s hipm e nt. The s t ate m e nt o n th e top of pa ge 2 of the cover l e tt er seemed to be in agree m e nt w ith page 3 o f th e cover l e tt e r in which the a pplicant s t a t ed (in proposed co nditi o n 4) that "There s h a ll be a ma xi mum of two R A J-II packages o n s in g l e tru ck , each co nt a ining a ma x imum of tw o LT As." On th e propo ed condi ti o n 5 , th e app li cant m entio n ed that " R AJ-II p ac k ages w ith G F A TF LT As s h a l l co mmin g le w ith o th e r R AJ-II package s ... " T h e r efore, it was not c l ear fo r the s taff th e maximum number of A TF Fe C rA I rods p e r packa ge a nd the n u mb e r of p ac k ages that w ill be s hipp ed at a n y given time on a truck , includin g GNF ATF L TAs. The ap pli ca nt indicated th at th e fo l l ow in g: I. The maximum numb e r of ATF ro d s in a p ackage will be 16. 2. T h e maximum numb e r of p ac k ages per tru c k (in c l udin g th e p ac k ages containing ATF L TAs) will be 1 3-1 4 package s. 3. The near term plan is to s hip t wo R A J-II p ackages co nt a inin g ATF L TAs co mmin g ling w ith ot h er package s co nt aining GNF fuel. 4. The applicant reque s t ed th e fl ex ibili ty to s hip GNF fuel with GNF fuel co nt a inin g ATF FeC r A I rods. The wo rdin g of the proposed Co nditi o n 4 was c l ea r th a t a ma x imum of tw o p ackages co uld b e l oade d per truck. When o n e memb er of the applicant's o r ga ni za ti on m e nti o n ed th a t the co nditi o n did n o t pr ec lud e addi ti o n al p ackages o n a truck. ano th e r G F-A m e mb e r ri g htly s tated that th e word in g co uld b e imp roved t o ex pr ess the app l i cat i o n's c l ea r int e nti on. Ba se d o n the eva luati o n sectio n of the cover l etter , the s taff aske d ifthe a ppli ca nt was r e l y ing o n the c l ad din g as th e containment boundary or not , s in ce the eva lu at i o n sect i o n mentions th a t the s tru c tural a nd thermal eva lu a ti o n s demonstrated that the G F FeCrA I f u e l rods would n ot ruptur e. T he a pplicant c l a rified th a t s inc e the a pp l ication Ii i1i ts FeCrA I fue l rods t o Type A fis s ile con t e nt , th e app li ca nt i s not r e l y ing o n the c l a ddin g as th e co nt a inm ent boundary , but as a b a rrier t o m a int ai n the pellet s in a sa fe geometry (i.e .. for critica lit y safe ty purpose s). The a ppli cant a l so indi cate d th a t it a n a l yzed water e nt e rin g into th e p e ll et-c l add in g gap. The staff mentioned that a co n ce rn was fa ilur e of the c l a ddin g r esu ltin g in p e ll e t s ge tting o ut of the c l a ddin g and radioactive mat e rial reconfi g urati o n. T he applicant m e nti o n e d that ifthe cladding bur s t , the app l i ca nt d oes n ot h ave ph ys i cal d a t a t o indi ca t e that pell et migration o ut s id e of the rod is possible.
The app li ca nt p o int e d o ut th a t U R EG/C R-1 458 a nd NU R EG/C R-5892 d oc ument a I transportation acc id e nt in vo l v ing a s hipm e nt ofG F fuel asse mbli es (in c luding a beyond design basis tire), w hi c h cau s ed a br eac h of the c l adding. T h ese NU R EGs concluded th a t there was n o fuel or p e ll e t mi grati n o ut s id e of the fuel rod a nd that a c riti ca lit y accident was n o t possible during th e acc id e nt o r after th e tir e. The a ppli ca nt p o int e d o ut thi s was in c lud ed in Sect i o n 6.6.2.2 of th e Letter Authorizat i on R eq u est. T he a ppli ca nt pointed out that , c urr e ntl y, th e st ru c tural a nd thermal a n a l yses d o n ot s upp o rt mi gration of pellet s o u ts id e of the c l a ddin g und er h ypot h etical acc id e nt co nditi o n s. H oweve r , s t aff had co mm e nt s/qu es ti o n s with the s tructural a n d th e rm a l a n a l yses provided. The discussion b e l ow includ es the s t af f s init i al co mm e n t s and qu es ti o n s r e lat ed t o the a ppli cat i o n. Materials Eva lu atio n The staff pointed o ut that th e FeCrAI mat e rial i s a ferritic stee l. Therefore , th e ta ff indi ca t e d that the a ppli ca nt s h ou ld u se R egu l atory Guide 7. I I as mentio n e d in the pr e-a ppli cat i on m ee tin g. The s ta ff as k ed i f the ssess m e nt of the c l add in g inte g rity was based o n th e 9 meter drop te s t ass uming z ir co nium mat e ri a l. T he a ppli ca nt r es p o nd e d that was correct. The staff a l so m entio n ed th at Figure 2-1 of At t ac hm e nt 3 of the a ppl i ca ti o n in c l ud es a s train c urv e at -2 0 F. The a ppli ca nt tated th at t est in g of th e FeC r A I m ate ri a l was performed a t a s train rate of[w ithh e ld p e r 10 CF R 2,390 (a pp l i ca ti o n)], to which the s t aff co mm e nt ed th at it wa hi g h in compa ri so n of a co n ventio n a l stra in rate. T he a ppli ca nt indi cated that the s t ra in rate was ba se d o n the fo ll ow in g: NRC FORM 699 (03-2013)
Page 2 of 3 NRC FORM 699 (03-2 013) U.S. NUCL E AR REGULA TOR Y COMMISSION CONVERSATION RECORD (continued)
ACTION R E QU I RE D (Co nt i nu ed from pa g e 1) I. the d ur a ti o n o f th e imp ac t of th e R A J-II p ac k age in pr ev i o u s drop te s t s of z ir co nium a ll oy; 2. t he s train ra te o f the c l a ddi n g i s " co ntro ll e d" b y th e p ac ka ge d es i gn (s i n c e th e pa c k age d es i g n did n o t c h a n ge, the a ppli ca nt ass um e d th a t the s train ra t e did n o t c han ge); a nd 3. t h e ass umpti o n th a t th e d es i g n o f the z ir co nium a ll oy a nd A TF LT A fu e l bundl e d es i g ns a re s imil a r fo r th e limit ed n u mb e r of FeC r A I rod s in a n ATF L T A. T he a ppli ca nt di d n ot p e r fo rm ph ys i c al d rop t es ts w ith FeC r A I ro ds a nd ass um e d th ese w e r e b o und ed b y (o r e qui va l e nt t o) th e t es tin g p e r fo rm e d wi th z ir co nium a ll oy ro d s. Th e r efo r e, th e appli c ant's a ppro a ch i s t o u se th e t es tin g t o ce rti fy th e R A J-II p ackage fo r th e ATF a ppli ca ti o n. T he s t aff indi ca t e d t h a t the s train ra t e m ay b e acce pt a b l e, but the s t aff s till n ee d s in fo rm a ti on t o d e t e rmine w h e th e r th e r e m ay be a l oca li ze d effect r e lat ed t o th e F eC r A I m a t e ri a l. The a ppli ca nt n o t e d th a t th e F eC r A I s urvi ve d fr o m a hi g h s t ra in ra t e t e n s il e t es t w ith o ut a fr ac tur e. The s t aff p o int e d o ut t h a t the c l adding of t he A T F F eC r A I r od i s ve r y thin a nd t he s t a ff wo uld n ee d th e fol l ow in g: I. co nfirm (from r e l a t e d lit era tur e d a ta or t es tin g) th a t th e s l o pe o f s tr ess-s t ra in c u rve i s hi g h e r fo r FeC r A I co mp a r ed to t h a t fo r z ir ca l oy. (Oth e r w i se, FeC r A I rods a m o ng z ir co niu m a ll oy rod s m ay b e b ul ge d o ut o r brok e n durin g d ro p. P rov id e th e s tr ess-s t ra in c ur ves fo r F eC r A I a nd z ir c al oy c l addin gs so th a t a co mpari so n can b e m a d e.) 2. d ata re l ated t o mi cro h a rdn ess t es tin g , fr ac tur e t es tin g, C h a rp y V-n o t ch t es t , t c.; 3. s t rai n c u rve at l ow t e mp e r a tur e (t o ve ri fy whether the s train rat e is a ppropri a t e fo r F eC r A I); a nd 4. a t e mp era tur e ra n ge t o m a intain th e i n te g r i ty of t h e c l a ddi n g. T h e ap pli ca ti o n co nt a ins a r e quir e m e nt fo r th e Y o un g's M o dulu s in A tta c h m e nt 2 Ta b le 2-5 (a l so r e p ea t e d in Ta bl e 1-2) w hi ch r e quir es a minim um M o du lus o f E l a s ti c i t y for the G F F eC r A I m a t e ri al t o b e u se d. The a pp l i ca nt s t a t e d th a t th e l owe r t e mp era tur e of th e HA C i s -40°C so t h at w a s t h e t e mp e r a tur e th a t th e t est w as p e r fo rm ed t o b o und th e n ecessary t e mp e r a tur e r a n ge of opera t io n. A S tr ess-S train c urv e fo r th e GNF FeC r A I m a t e ri a l a t -4 0°C i s p rov id e in A tta c hm e nt 3 F i g ur e 2-1. T h e R eg ul a t o ry G u id e 7.11 r e q ui r e m e nt s ar e b ase d o ff mat e ria l t h at i s 0.0 2 5 inch es a nd thi c k er d e p e nd i ng o n th e ca t ego r y c l ass ifi ca ti o n. Th e fu e l c l a ddin g wa l l t h ickn ess i s b e l ow 0.0 25 inch es fo r this a pl i cati o n. T he a ppli ca nt s t a t e d th a t the t hin c l addi n g wa ll p r ovi d es a n a dditi o nal m a r g in aga in s t brittl e fr a ctur e in th e m a t e ri al r e l a ti e t o th e R eg u l a t o ry G uid e 7.11 r eq uir e m e n ts beca u se th e s tr ess s t a t es wo uld b e geo m e tri ca l l y for ced t o b e in pl a ne s tr ess l oa ding w hi c h has a hi g h e r fr ac tur e t o u g hn ess t h a n th e pl a ns t ra in l oa din g. Creep Mo d e l Eva lu a ti o n T h e staff n o t e d th a t it m ay h ave qu es ti o n s r e l a t ed t o th e fo ll ow in g t o pi cs: I. b ases for the a l l owa b l e h oo p s tr ess of 6 5.2 m ega p asc a l s (MP a); 2. r efe r e n ce a nd j u s t i fi ca ti o n of th e ge n e r a l i ze d c r e ep e qu a ti o n; 3. so m e in co n siste n c i es w ith unit s (e.g., kil o Jo ul e p er m o l (kJ/m o l) ve r s u s kil o Joul e p er K e l v in m ol (kJ/K *km o l)] n eeds t o be r ev i sed; 4. d e m o n s trat e th at t h e I 0% c r ee p s tra i n li mit i s co n se r va t i ve and prov i d e th e PeC r A I s tr ess-s train c ur ve a t th e hi gh t empera tur es; a n d 5. d i sc u ss i o n a b o ut h ow th e h y p o t h e ti ca l acc id e nt co nditi o n th e rm al t es ts a nd a n a l ys i s co n s id e r th e d a m age fro m ot h er h y p o th e t ica l acc id e nt co nditi on t es t s (e.g., drop , i mp ac t). T he s t aff as k e d s imil a r qu es ti o n s in th e r ece n t r ev i s i on t o th e Mode l No. R A J-I I (Ce 11ifi ca t e of Co mp l i a n ce, R ev i s i o n 1 1 ). A t the e nd of t h e m ee tin g the a ppli ca nt ex pr esse d inter es ts o n ha v ing a dditi o n a l ph o n e ca ll s t o di sc u ss t h e s t affs qu es ti o ns a n d a t o-face m ee tin g. Di v i s i o n o f S p e nt F u e l M a na ge ment s taff and m a n a ge m e nt n o 1 t e d that the a pp l i ca nt ca n a l so r e qu es t a pu b li c m ee tin g t o h a ve a d e t a i l ed d i sc u ss i o n o f the s taff s q u es ti o n s. Th e app l i c ant a l o r e qu es t ed t h a t if a m ee tin g were t o b e sc h e dul e d , h av in g R C qu es ti o ns at l eas t a wee k in a d va n ce w o uld e nh a n ce th e va lue o f th e m ee tin g. NRC FOR M 699 (03-2013)
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