The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 13, 2007
Filed:
Jul. 18, 2003
Hiroaki Taniuchi, Takasago, JP;
Jun Shimojo, Takasago, JP;
Yutaka Sugihara, Ichikawa, JP;
Eiji Owaki, Yokohama, JP;
Reiko Okamoto, Kawasaki, JP;
Hiroaki Taniuchi, Takasago, JP;
Jun Shimojo, Takasago, JP;
Yutaka Sugihara, Ichikawa, JP;
Eiji Owaki, Yokohama, JP;
Reiko Okamoto, Kawasaki, JP;
Kabushiki Kaisha Kobe Seiko Sho, Kobe-shi, JP;
Taisei Corporation, Tokyo, JP;
Abstract
The invention provides a composite from which concrete featuring a sufficiently high heat resistance can be produced, as well as a high-safety sealed concrete cask having no opening (shielding defect) to offer high shielding performance that can prevent corrosion of an internal canister and release of radioactive material to the exterior. A concrete cask of the invention includes a cask body having a bottom but no lid in itself, and a lid which can open and close off a top opening of the cask body. Both the cask body and the lid are made of concrete manufactured by using a composite including Portland cement or blended cement containing Portland cement, which is mixed with water in such a manner that the content of calcium hydroxide falls in a range of 15% to 60% by mass after hardening through hydration reaction. Metallic heat-transfer fins are embedded in the cask body.