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:
Sep. 18, 1990
Filed:
Feb. 17, 1989
Applicant:
Inventor:
Gerald L Ritter, Richland, WA (US);
Assignee:
Advanced Nuclear Fuels Corporation, Bellevue, WA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G21C / ;
U.S. Cl.
CPC ...
376444 ; 376435 ;
Abstract
An advanced boiling water reactor (BWR) fuel design is described that preferentially directs more unvoided water coolant into the upper portion of the fuel assembly. This allows relatively more fuel to be placed in the lower portion of the fuel assembly. This arrangement allows a more nearly optimun moderation of neutrons in the upper portion of the assembly while preserving a higher volume of fuel in the lower portion. In addition to providing a more nearly optimum distribution of water in the assembly, the larger number of fuel rods can be used in the lower portion to reduce the linear heat generation rate (power peaking) in the assembly.