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:
Jul. 28, 1981
Filed:
Oct. 19, 1978
Hitachi, Ltd., Tokyo, JP;
Abstract
The core of a nuclear reactor is constituted by two sorts of fuel assemblies: first fuel assemblies each of which contains both fissile material and gadolinea and second fuel assemblies each of which contains only the fissile material. The ratio of the number of the first fuel assemblies to that of the second fuel assemblies are selected to be 1:3. The enrichment of the fissile material is larger at the upper part of the reactor core than at the lower part of the same. The fuel assembly containing both of the fissile material and the gadolinea includes first fuel rods each of which contain both the fissile material and the gadolinea, and second fuel rods which contains only the fissile material. The number of the first fuel rods and the concentration of gadolinea are substantially in proportion to the power density at positions in the reactor core where the fuel assembly is placed.