Primary Inventor: Krishna P. Singh
Contributing Inventor(s): Debabrata Mitra-Majumdar, Abrar Hasan Mohammad, John Griffiths
Date: Nov. 1, 2022
Status: Granted
Jurisdiction: US
Assignee: Holtec International
Equipment Type: Wet Storage
Docket Number: HOL-127
Application Number: 16/792,711
Patent Number: US 11,488,737 B2

Prior Publication Data: US 2020/0265966 A1, Aug. 20, 2020

Related U.S. Application Data: Provisional application No. 62/806,144, filed on Feb. 15, 2019.

Abstract: A system for externally cooling a radiation shielded cask containing heat-emitting high level radioactive waste such as spent nuclear fuel. The system includes the cask defining an internal cavity configured to hold an unshielded canister containing the spent nuclear fuel. An annular cooling water header extends circumferentially around the entire circumference of the cylindrical sidewall of the cask. The header comprises plural dispensing outlets which direct cooling water onto the cask, thereby wetting the entire sidewall of the cask. The cooling water provides an external heat sink for absorbing the heat emitted through the external wall surface of the cask generated by the spent nuclear fuel. In various embodiments, the cooling water header may have a continuous annular structure, or be formed by two or more header segments. The header may be supported directly from the cask by detachably mounted brackets.