Method and Apparatus for Maximizing Radiation Shielding During Cask Transfer Procedures

Primary Inventor: Krishna P. Singh
Contributing Inventor(s): Stephen J. Agace
Date of Patent Issuance: February 12, 2008
Status: Granted
Jurisdiction: US
Equipment Type: HI-TRAC
Docket Number: HOL-021
Publication Number: US 2007/0003000 A1
Application Number: 10/371,477
Patent Number(s)US 7,330,525 B2

Related U.S. Application Data: Division of application No. 10/101,028, filed on March 18, 2002, now Patent No. US 6,587,536 B1

Abstract: A transfer cask for maximizing the radiation shielding for spent nuclear fuel during cask transfer procedures has a cylindrical inner shell forming a cavity within which a spent nuclear fuel canister can be placed; a cylindrical outer shell concentric with and surrounding the inner shell to form an annulus with the inner shell, the annulus adapted for receiving gamma absorbing material; a jacket shell concentric with and surrounding the second shell to form a jacket for holding a neutron absorbing liquid; the jacket shell having filling and drainage systems; and a removable bottom lid so that a canister can be lowered from the cavity into a transport cask or permanent storage cask.