Primary Inventor: Krishna P. Singh
Date: Dec. 6, 2022
Status: Granted
Jurisdiction: US
Assignee: Holtec International
Equipment Type: Shield Jacket
Docket Number: HOL-130
Application Number: 17/000,493
Patent Number: US 11,521,761 B2

Prior Publication Data: US 2021/0057120 A1, Feb. 25, 2021

Related U.S. Application Data: Provisional application No. 62/890,813, filed on Aug. 23, 2019.

Abstract: A containment enclosure for shielding an outer cask containing an inner canister loaded with nuclear waste such as spent fuel rods. The enclosure includes a lower base portion at least partially embedded in a concrete pad and an upper radiation shielding portion defined by a shield jacket coupled to and supported by the lower base portion at a circumferential joint. Cavities of the base and shielding portions collectively define a contiguous containment space for the cask. A portion of the cask resides in each of the base and shielding portions which completely enclose and shield the cask to minimize radiation dosage of personnel in the environment surrounding the cask. The cask is cooled by a natural convectively-driven ambient cooling air ventilation system including air inlets at the circumferential joint of the enclosure. The concrete pad may be part of a spent nuclear fuel storage installation comprising plural cask containment enclosures.