ML23101A027
| ML23101A027 | |
| Person / Time | |
|---|---|
| Site: | 07103004 |
| Issue date: | 04/03/2023 |
| From: | Boyle R, Neely R Edlow International Co, US Dept of Transportation (DOT), Office of Hazardous Materials Safety |
| To: | Division of Fuel Management |
| Garcia-Santos N | |
| Shared Package | |
| ML23100A181 | List: |
| References | |
| JMS?87Y?18.5T | |
| Download: ML23101A027 (5) | |
Text
Out l he of Desi gn Approval f or Nu91ear Fuel Trt t spot t Package usi ng4J MS 87Y 18. 5T Package Out l i ne Thi s package has been used l or t anspoHi ns spent Fuel s f rom research react ors t o he U. S, si nce 1989( manut t Ct t red1989) and has s( ) f ar been used f or t t anspohat i on whi l e t ak g neces l i censi ng procedures such as havi ng peri odi cany reneved t he t t oval peri od and appl yi ng f or approvt t associ at ed wi h aHnendment f Or addi t i on of cont ent s( spent f uel s).
Fol l owi ng t he domest i c adopt i on of t he 2018 edi t i on of I AEA' s Resul at i ons f or he Saf e Transport of Radi oact i ve Mat eri al, "t he regul at i ons hcl udhg t hose known as Out si de Transport Regul at i ons were revi sed on J anuary l, 2021, f or he put t ose of addi t t conSi derat i ons oF aghg durh8 t he st orage of pat t ages and duri ng he use of t t ucl ear f ucl anspoH package( wi h t he cont ent s i caded h a paOkage). I n accordance wi n t hi s rev l o, We dedded t o add a descri pt i o of he resul t s of t he condderat i ons and eval uat i ons of agi ng i n t he at t achnent whi ch expl ai ns saf ct y
( an i t en t O be descri bed M an t achment ) and t O del et e t t e rcgt t cred cont ent s whi ch woul d not be t ransponed i n t he Fut urc nd appl y f or t he r98i St rat i on, I n addi t i on, was dcci ded hat t hi s appl i cat i on was t o be submi t t ed as a new appl i cat i on( appl i cat i on f or desi an appr( ) val ) i n accordance wi n t l l e sui dal l ce f rom t he Nucl et t Regul at i on Aut t ori v l t i sot necessary t o consi der t t e del et i on of t he regi st ( red col l t ent s al l d he agi ng erect s, i n cont t mi ng compl i ancc wt hc t ect t dcal cri t eri a, and heref ore t he resuhs of t hese saf et y anal yses( st t ut t ural anal yds, herrnal anal ysi s, coat ai nment anal ysi s, shi el d anal y s, al i d cri t i cal i andyt t o remah unchanged. However, i n t t e procet t of saf et y anal ysi s, a part of 4umber processhg was changed. Tt t s i s becaut t t he J apan At omi c Energy Agency i nt ended t O conduct a more conservat i ve eval uat i on.
- 1. Del et i on of he regi st ered cont ent s hat wi l l not be t ranspot t ed i n t he f ut ure Curent cont cnt s 8 t ypes Cont ent s i n t he f ut ure 3 t ypes Largcst among he cont cnt s J MTR St andard Fucl El ement s( HE Dcl et ed J MTR Fuel Fol l owers( HEU)
Del et ed J MTR St andard Fuel El cment s(
I E J MTR St andard Fud El emen( WI E J I TFuel Fdl owers( "I EU)
Dcl et cd J MTR Sdard Fuel El ement s( LEU)
J MTR St andard Fuel El ement s( LEU)
J RR 3 Al mi ni de St andard Type Ft i el El cment s Dcl et cd
J RR 3 Al umi ni de Fol i ower Type Fuel El ement s Del et ed
Therl nal st rcss
Though he regt t t rat i on as cont ent s i s del et ed, pF ramet er val ues Of t he f uc1 919=1l ent used i n t he saf et y anal ysi s are used t t conservt t i ve desi gn val ues. ( COnt ent wi t h l o ver decay heat t han he cont ent expect ed)
- 2. Consi derat i ons oFAgi ng oFNucl ear Fuel Trans, ort Package l n order t o renect he revi si ol l s of t t Rul es on Transport i ng Nucl ear Fuel Mat eri al s et c. oBt si de he Pi ant or Pl ace of Busi ness"and t `Not i ce on di e Det ai l s of Te(
ni cal St andards f or Transport of Nucl ear Fuel Mat eri al s et c. out si de he Pi ant or Pl ace Of Bushes
' ( f or t t OSc erect e unt i l J anuary l, 2021), an eVal uat i on of t he assumed usage condi i ( ) ns dut t ng he servi ce nf e and he subsequent agi ng was conduct ed al l d t he resul t s are descri bed i n W( I I )
F. Consi derat i ons of A8i ng of Nucl ear Fuel Transport Package"h Appendi x 1.
Agi ng was eval uat ed assu l i ng t hat t he pcri od of use i s 40 yeart t a pa age i s used once a year, and a t ram. port t dom pi Od per t ran. spoh i s 365 days f l o14 a COnServat i ve vi ewpoi nt,
Agi ng f act ors t o be consi dered f or t t i s package were heat, radi at i on, chemi cal cha1l ges, and Fat i sue due t o repet "e l oads, whi l e mat eri al s consi dered f or agi ng were st ai nl css st ed( bOdy, Ld, baSkC, nel l t ron absorber, al umi num al l oy and
( 1) St t t ni ess st eel St t nt t s st eel i s used as t he smct ural st rt t gt h member of dt t i s packt t e. Agi ng assumed herrnal de8radat i om may degrade he mechani cal charact ert t i cs due t o hi gh t ( perat l l re embri t t l ement, such as creep( def Onnat i on), caused by exposure t o hi gh t emperat ure envi roni nent s, However, based on he resul t s of he t hermal al l al ysi s, t he maxMl um t emperat ure duri ng t t ansport at i on i s about 3 10° C, whi ch i s bel ow t he t emperat ure at whi ch t he t t rengh cot l l d change duc t O crcep et c. ( abOVe 425° C), sO herei s no need t o consi der he egect of agi ng i n conarHl i ng COmpl i ance wi t h t he t echni cal cri t eri a, Agg assumed i n radi at i on degradat i on may arect he me ani cal charat t eri st i cs due t o changes i n mat eri al oI Bani zat i on( embrt t l ement et c. ) cauSCd by neut ronradi at i on. Owever, he naxi mun dose of neut rol wi l l be on he ordt t of 1015 4/Cm2, whi ch i s bet ow he dose of 10164/Cm2 at Whi ch mneri a1 0rgant t at t on coul d change( embri t t l el nent et c. ). Theref Ore, here i s nol eed t o consi der t he erect of aghg i n conf rmi ng compl i ance wi t h t he t echni cal cri t eri a.
Agi ng assuncd i n chemi cal degradat i on l l ay af Fcct t he mat eri al st reagt h and cause embri t t l ement due t o corrosi on. However, st ai al ess st eel i s a rnat eri al t hat f oms a pass e nl m on i t s surFace and does not corrode easi l y, and t hc dcpt h of corrosi on i n t he ai ri s est i mat eS t o be
l m( 0. 001 mm) per year md a mamul l n of O. 04 mm dl l rhg t he peri od of usc, whi ch i s a negl i gi bl e al nol nt of coosi On COmpared t o t he hi ckness of t he mcmbcr( apprOXi mat el y 300 mm f ort he body of a padkage). ThereFore, t here i s no need t o consi der t he ef Fect s of agt t g i n conf rmg compl i ance wi t h t echni cal cri t eri a.
Asi ng assul ned i n f at i gue degradat i on may cause a f at i gue f ai l ure due t o repeat ed l oadi ng. For a l i ni ng dewi ce( paCkage body),
e f requency of t t s uses per year i s assumed t o be 20 t hes, d
he real i st i c f requency of expect ed l i i ngs duri ng t he peri od of use i s 800 t i : nes, but t he f requency of l i ni ngS f or cOnf ormance t o t echni cai cri t eri a i s conserwat i vel y t t sumed t o be 4, 000 t i mes, S o9 t he repet t count of 4, 000 t i mes covers he expect ed f requel l cy of uses, he repeat count i s conservat i vel y set l conduct i ng f at i gue eval uat i ons. I n addi t i on, assumi ng t hat a cont ai nent dewi ce( cont ai ner body) l i d, and l i d t i 3ht eni ng bo
) i s handl ed one dme per year, a repeat couH wi l i be 40 t i mes 40 years, but i t i snset t at "el y set at l, 000 t i mes f or compl i ance wi
t he t eOhni cal cri t eri a, Si nce t he repeat count of 000 t i l ncs cowers t he expect ed l equency of uses, t he repet t couconservt t ve, st t h COnduct i i gue evaht t i ons.
( 2) Neut ron absorber Neuo4SOrbers are used f or mai nt ai ni ng he subcri t i cal i t y of a package. Agi ng assumed i n t hermat deBradat i on may degrade he t t nct i on f or mai nt ahi ng he subcri dcal i t y due t o changes i n he mat eri al organi zat i on caused by exposure t o hi gl i t emperat ure envi ronment s. HoweveL based on he reml t s of he t hermal anal ysi s, t he mt t mum t el xl perat ure dur g t ranspot t at i on i s about 310° C, Whi Ch i s bel ow t t e t emperat e at whi ch t t i s mat eri al mchs( 2450° C). Theref ore, here i so need t o consi der he et t ct of agt t i n condmh8 COmpl i ance wi t t he t echni cal cri t eri a.
Aghg assumed i n radi t t i on degradat i on may degrade he Funct i on f or mamt ai nh8 he subcrhi cal l y due t O depl et i on of 10B caused by neut ron i radi at i on. Howevet t even on he COXl SerVEi t i Ve a unpt i on daat t he perl od of use i s 100 years, t he rnaxt t num dose of nel l t on wi l l be on t he order of 1014 n/Cm2, and t he depl et i on of 10B i s est t mat cd t o be about O. 00430/
, whi ch i s a nesl i si bl e amount. ThereFore, t here i s no need t o consi der he ca ct of agi ng J l conar l i n compl i ancc wi t h t he t eChni cal cri t eri a.
ABg assumed i n dhei l l i cal deBradat i on 14ay dcBrade t he f unct i on f or i nant ai ni ng t he subcri t i cal i t y due t o corosi ( n. HowcveL Si nce i t i s h a seal ed space hsi de t hc baskct pal t i t i on
( St t t ni ess t t eel ) and dOes nOt come i nt o cont act wi h t he out si dc ai corosi on does not occui ThereFore, t here i s o need t o consi dcr he erect s Of agi ng i n conarrni ng Compl i ance wi t h t echi cal st andards,
( 3) Al umhui n a1l oy( spaCCr)
Al ummum al l oy l s used as spacers and het t t ra1l sf er component s when Fol l ower Type Fuel l s l oaded, Agi ng assumed i n hcr! 4al degradat i on may arect heat t ransf er perf ormance due t O changcs h he mat eri al organi on caused by exposure t o hi sh t emperat ure en ronl nent s.
However, based on t he resul t s of he t heri nal anal ysi s, t he maxi mum t emperat urc duri ng anspOrt at i on i s about 320° C, whi ch i s bel ow t he t emperat ure at whi ch hi s mat eri al mehs
( 660° C). ThCref ore, here i s ao need t o consi der t he erect of agi ng i n cont t mi ng coal pl i ance wi a t he t eohni cal cri t eri a.
Agi mg asst i t ned i n radi at t on dcgradat i on may arect t he heat t ransf er perf or: l l ance due t o changes h mt t eri al organi zt t i on( cnbri t t l ement et c. ) cauSed by neut ron t t adi at i ( ) n However, t hemaxmundoseof neut t ondurhgt t epcri odof usevi l l beont heorderof 1015n/Cl 2, whi ch i s bel ow t he of 102i n/Cm2, whi ch coul d cause changes i n mat eri al organi zat i on( embrnt l ement et C. ). ThereFore, here i s mo need t o condder t he erect of aghg i n conari n g compl i ance wi n t he t echni cal cri t eri a.
Aghg assumed i n chemi cal degFadat i on may arect hen t ransf er perf ormt t ce due t o corrosi on. Howevt t al ul ni mum a1l oy i s a mat eri al hat f orFnS an Oxi de ah on i surf ace and i s resi st ant t o corrosi o1, and i t wi l l be used at t er conarHl i ng t hat here areo abori nal i es i n i t s appearance pri or t o shi pment. Thcref ore, t here i s no need t o consi dcr t he erect of ag g i n conarmg COmpl i ance wi n t t l e t echni cal cri t eri a.
( 4), ( shOCk absoer) i s used as aock absorber f or Hl i t i gat i 48 t he i rapact of drops. The assumed agi ng i n hert t nal degradat i on may be t he degradat i on of mec ani cal propert i es due t o he pl acement i n a hi gh t empcr ure envt t onnent, but t t om t he resui t s of 9 hcrmal yse maxl l num t emperure duri ng t ransport at i on i s about 80° C whi l e t he t emperat ure duri ng he act ual t ransponat i On t hat has been cot i duct ed so f ar i s about 40° C. The common wi ew on he t hermal degradat i on of wood i n he i ndust ry rel at ed t o t hc package i s t h
[ 1] t here i s a l ack of l i t erat ure t hat can be di rect l y ref erred t o regardi ng t he decrease i n st engt h of vood duc t o heat i n a hi gh t cmperat ure envonment, [ 2] he average t emperat ure dat a of a shock absorber
( W00d) f a separt t e package t hat has a rack recOrd of t rt t sport i ng spent f uel et c. i s eval ut t ed as about 40t o 70° C, [ 3] as a reSul t of conduct i ns crl l Shg st t engt h and densi t y measurement s For wood t est pi eces t aken f rom t he packages hat were used f or t raHl sport i ng spent f uel i n he past, he energy absot t t i on perf ormance of he wood was sound z ndo pcrf or: i nance degradat i on of t he shock absorber was con ed, [ 41 bccauSe under t he condt t i ons of normal use, no perf ormt t ce degradat i on of t he shock absorber has beeri conf t t med, t here t t s no need l o consi der t hermal deBradat i on i n conf rHi ns comphance wi t h t echni cal cri t eri a, as t ong as t hi s package i s t l sed wi t hi n t he range of he past achi evement s.
The assumed ag, 8radi at i on de8radat i on i s t he eect on he me( al propet t i es due t o st t uct ural changes( embri t t l ement et c. ) caused by radi t t on exposure, but si nce t t e maxi mum 4eut rOn i rradi at i on dose duri ng t he peri od of use i s on he order of 10° Gy, and t he Bax4ma i rradt t i on dose i s on he order of 100 Gt t whi ch at e bel ow 3 Gy and O. l MG}whi may cause st ruct ural changes( e=nbl e=nent et c. ), ere i s no need t o coxl dder erFect s of aghg i n cokl f rmi ng compl i ance wi t t t echi cat cri t eri a.
The assuned agi ng i n t t emi cal degradat i on may be t he erect on reduci ng st re 8t h due t o corrosi on, embri t t l ement, et c., but si ncc t t i s h a scal ed spacc ddc t t e cl addi ng( St ai nl ess eeand dOes not come mo cont at t wi h he out si dc docs not corrode. Theref ore, here i s mo need t o consi der erect s of aghg i n conf rm g comphance wm t echi cal crt t eri a.
- 3. Mscel l aneous
' Numbers of agures, t abl es and pages were nodi rl ed, as some of t t e t t gi st ered cont ent s were del et ed.
Regardi ng he eval uat i on of compl i ance wi t h t he t FanSpOrt regul at i ons ment i oned i n Chapt er F of t he ol d SA has been del et ed f rom t t e l at est SAt t because i t was t t t ended t o demonst rat e t hat he package compl i es wi h he J apanese t r
nSpOrt regul at i cas, and i t i s not rel evant t o t he appl i cat i on i n he U, S.