ML24022A251
| ML24022A251 | |
| Person / Time | |
|---|---|
| Site: | 07103004 |
| Issue date: | 08/28/2023 |
| From: | Edlow International Co, US Dept of Transportation (DOT), Office of Hazardous Materials Safety |
| To: | Garcia-Santos N Storage and Transportation Licensing Branch |
| Shared Package | |
| ML23255A102 | List: |
| References | |
| 001794 | |
| Download: ML24022A251 (3) | |
Text
A. 10. 4 Encrgy absorpt i on at t he shock absorber i n f ree drop t cst I I The i mpact energy( Es) i n an eccent ri c drop shal l be absorbed by t he energy consumpt i on requi red f or t he pcnct rat i on t hrough t he cover pl at i ng mat eri al of t hc shock absorber and cnergy consumpt i on requi rcd f ort he def oHnat i on i mposed on t hc Es=EsPt t EAB absorbet t hat i si
- vherc, EsP: Energy rcqui red f or penet rat i on of t he cover pl at i ng mat eri al EAB: I mpact encrgy t o be cOnsumed absorber
- 1) Energy( EsP) requi red f or penet rat i on h ugh he cover pl at i ng mat eri al.
The encrgy( EsP) requi red f or penet rat i ng t hc cover pl at i ng mat eri al can be cxprcsscd by t he f ol l owi ng f oHnul a.
EsP=Cl C2 dt h( 37)
- where, CCoemdent l C2: COef f l ci cnt
d: E) i amet er of t he mi l d st ee1 l od 150 l i n Mi ni nunl pl at e t hi ckness of t he cover pl at i ng rnat eri al
( ) : Tensi l e st rengt h of t hc cover pl at i ng mat eri al hi Def onat i on t hi ckness=10t EsP
- 2) I mpaCt energy( EAB) t O be COnsumcd EAB~Es EsP Assumi ng he i mpact energy( EAB) Shal l be consumed f or onl y comprcss c def omat i on Of t he shock absorber vhi ch has bccn def oHned by t he d op t est I, t he compressi ve def oHnat i on wi t h t hc cross sect i onal area of t he rni l d st eel bar shal i be numeri caHy cal cul at ed usi ng t he cal cul at i on code S I OCI 2.
I n t hi s cal cul at i on, t he ef Fect of encrgy absorpt i on by sheari ng of caused by t he, l i l d st eel bar shaH be ne81ect ed t o be t he saf c si de.
A. 10. 5 St ress l nt cnsi t y f or t he Rcpcat ed Peak Thc cumul at e t ransport at i ons( number Of repet i t i ons) t ot al up t o 60, under t he assumpt i on t hat t he package vi l l be t ransponed t vi cc a year and t he durat i on year of t he packagi ng wi l l bc 30 years, however i n t hi s anal ysi s i t i s t aken as 1000 f or hc saf er si de, whcrc t hc st ress i nt ensi t y f or t he rcpeat ed peak shal l be f or t he mat e s, SUSI l and suSI I l compOShgt he cask bodt t l i d, and basket, ref eri ng t o t hc MI TT not i acat i on, ( as shOWn i n Fi ( H) A. 147). Thi S Val ue i s at room t cmperat ure, so t hat t hc al l owabl e repcat ed peak st t ess i nt ensi t y( Sb) Shal l be def i ned accordi ng t o t he f oHowi ng f oHnul a ref cri ng t o t he operat i ng t cmperat ure f or each component i
=
b
( 1) CaSk bOdy The Youngs modus at operat hg t cmperat ure absorber
( H) A-375
Sb
( 2) Li d The Youngs moduhs at opera8 t emperat ure
( 3) Basket Thc Youngi s l nodul us at opcrat i ng t emperat ure l
( 4) Bohs f Or f ast eni ng t he l i d The bohs hr t t st enhg t he ndmadc of sUSE so t hat t he repeat ed peak st ress ht ensi Shl be
, ref eri ng t o t he MI TT not i f l cat i on, ( as shOWn i n F
( I I ) A. 148),
t he repcat ed peak st ress anowabl c( Sb) Can be expressed by t he f ol l owi ng f ori nul a:
=
b The Youngs moddus opert t hg t emperat u S
The val ue of t ot al of he st rcss pri ma, secOndary and repeat ed pcak st rcss i nt ensi t y, shal l be t he sum of t he maxi mul st ress under nori nal condi t i ons of t ransport and acci dent condi t i ons of t ransport ; t he summaof hese rcsdt s are shown h TabL an A, 31, whcrc t he smst margh of saf e
f Or t he bol t s f or f ast eni ng l i d; so t hat i t can be grant ed t hat t he package has adequat e st rengt h evcn i f t he equency of rcpeat ed uses i s t aken i nt o account.
( I I ) A-376
Tabl e( HA31 Eval uat i on of t he Deak St ress
( Uni t i N/mm2)
Margi n of saFe( MS)
Repeat ed peak al l ovabl e st ress i nt ensi Tot al of
- prHnary, seconda and peak st ress Acci dent condi t i ons of t ransport Free drop t est
I I Frec drop t est I Corner drop Hori zont al drop Vert i cal drop
_Normal condi t i ons Of t ransport Compressi On Low t emperat ure t cst Therl nal t est Theal t est Component Cask body Li d Franc Part i ng and di vi di ng pl at es Bol t s f or f ast eni ng t he l i d Basket