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:
Feb. 03, 1998
Filed:
Jun. 14, 1994
Naohito Uetake, Katsuta, JP;
Masayoshi Kondoh, Hitachi, JP;
Makoto Nagase, Mito, JP;
Hideyuki Hosokawa, Hitachi, JP;
Teruo Hara, Hitachi, JP;
Yamato Asakura, Katsuta, JP;
Katsumi Ohsumi, Hitachi, JP;
Kazuhiko Akamine, Katsuta, JP;
Kouichi Yamane, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
In reactor water control for a BWR power plant during an operation cycle after loading new fuel rods in the BWR power plant, an operation is performed which accelerates deposition of crud on the fuel rods until the deposition amount of the crud on the fuel rods reaches a predetermined target value within the operation cycle concerned. After the deposition amount of the crud has reached the predetermined target value, the crud deposition accelerating operation is terminated, whereby even when loading new fuel rods such as Zr liner type fuel rods having a surface on which metal ion deposition has been difficult, radioactivity in the reactor water is efficiently reduced.