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:
Mar. 31, 1981
Filed:
Aug. 30, 1977
Applicant:
Inventors:
Tuyoshi Niino, Hitachi, JP;
Yuichi Uchiyama, Hitachi, JP;
Assignee:
Hitachi, Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G21C / ;
U.S. Cl.
CPC ...
176 38 ; 176 87 ;
Abstract
A nuclear reactor containment structure including a diaphragm floor for dividing a closure casing into a drywell and a pressure suppression chamber, the diaphragm floor being supported at its inner peripheral end by a pedestal for a pressure vessel and abutting at its outer peripheral end against shear keys secured to the closure casing. The diaphragm floor includes a concrete layer embedded between structural steels extending radially between the pedestal and the shear keys.