Primary Inventor: Krishna P. Singh
Date of Publication: August 14, 2018
Status: Published
Jurisdiction: US
Assignee: Holtec International, Inc.
Equipment Type: HI-STORM
Docket NumberHOL-056
Patent NumberUS 10,049,777 B2
Application Number: 14/358,032

PCT Filed: November 14, 2012
PCT No.: PCT/US2012/065117
PCT Pub. No.:  WO 2013/115881 A2
PCT Pub. Date: August 8, 2013

Prior Publication Data: US 2014/0329455 A1 published on November 6, 2014.

Related U.S. Publication Data: Provisional application No. 61/559,251, filed on November 14, 2011.

Abstract: A system and method for storing high level radioactive waste, such as spent nuclear fuel.  In one embodiment, the invention is a method of storing high level radioactive waste comprising: a) positioning a metal canister containing high level radioactive waste having a heat generation rate in a storage cavity of a ventilated system comprising a cask body, a cask lid positioned atop the cask body, at least one outlet duct extending from a top of the storage cavity to an ambient atmosphere, and a plurality of inlet ducts, each of the inlet ducts extending from a first opening in the outer surface of the cask body to a second opening in the inner surface of the cask, body; and b) scaling selected ones of the plurality of inlet ducts over time as a function of a decay of the heat generation rate to maintain more a predetermined percentage of a vertical height of the metal canister above a predetermined threshold temperature.