Primary Inventor: Krishna P. Singh
Date: Mar. 29, 2022
Status: Granted
Jurisdiction: US
Assignee: Holtec International
Equipment Type: MPC
Docket Number: HOL-125
Application Number: 16/695,450
Patent Number: US 11,289,227 B2

Prior Publication Data: US 2020/0176143 A1, Jun. 4, 2020

Related U.S. Application Data: Provisional application No. 62/772,986, filed on Nov. 29, 2018.

Abstract: A canister for storing spent nuclear fuel includes an elongated shell, baseplate enclosing the bottom end of the shell, and removable top lid bolted to the shell. The shell may have a dual thickness comprising a lower portion with first thickness and upper portion with greater second thickness by comparison. The upper portion is formed by an annular boss defining a fastening portion of the shell including plural threaded bores for engaging the lid bolting. The fastening portion may protrude radially outwards or inwards in different embodiments. The lid has a mounting flange receiving the bolts and is seated on the top end of shell. The mounting flange does not protrude radially beyond the outer surface of the fastener portion to minimize the diameter of the canister for placement inside an outer radiation shielded overpack or cask for transport/storage. The shell may optionally include cooling fins.