US 11,721,447 B2
Impact amelioration system for nuclear fuel storage
Krishna P. Singh, Jupiter, FL (US); and John D. Griffiths, Deptford, NJ (US)
Assigned to HOLTEC INTERNATIONAL
Filed by Holtec International, Camden, NJ (US)
Filed on Dec. 23, 2020, as Appl. No. 17/132,102.
Claims priority of provisional application 62/954,083, filed on Dec. 27, 2019.
Prior Publication US 2021/0225541 A1, Jul. 22, 2021
Int. Cl. G21F 5/08 (2006.01); G21F 5/008 (2006.01)
CPC G21F 5/08 (2013.01) [G21F 5/008 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An impact amelioration system for nuclear fuel storage components comprising:
a fuel storage canister comprising a first shell extending along a vertical centerline, the canister configured for storing nuclear fuel;
an outer cask defining a cavity receiving the canister, the cask comprising a second shell and a bottom closure plate attached to the second shell;
a plurality of impact limiter assemblies disposed on the bottom closure plate at a canister to cask interface, each of the impact limiter assemblies comprising a plug frictionally engaged with a corresponding plug hole formed in the bottom closure plate;
wherein the plugs engage the canister;
wherein the plugs are tapered and the plug holes have a corresponding taper.