Ventilated Transfer Cask with a High Integrity Lifting Feature and an Integral Impact Limiter, US 9,466,400 B2, 2016 (HI-TRAC)

Primary Inventor: Krishna P. Singh
Contributing Inventor(s): John D. Griffiths
Date of Patent Issuance: October 11, 2016
Status: Granted
Jurisdiction: US
Equipment Type: HI-TRAC
Docket Number: HOL-079-US
Publication Number: US 2016/0005501 A1
Application Number: 14/762,874
Patent Number(s): US 9,466,400 B2

Also Published as: WO 2014/117082 A1

Abstract: An apparatus for transferring spent nuclear fuel in the form of a cask having a cylindrical inner shell forming a cavity configured to receive a canister containing spent nuclear fuel, an intermediate shell disposed concentrically around and spaced apart from the inner shell and an outer shell disposed concentrically around and spaced apart from the intermediate shell. A bottom flange is affixed to bottoms of each of the shells, and a bottom lid is removably affixed to the bottom flange. A top flange is affixed to tops of each of the shells, and a top lid is seated on the top flange. An annulus for air flow may be formed between the inner shell and the canister; the bottom lid may include an impact zone including impact absorbing structure; and the top flange may have integrally formed trunnions.