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:
Oct. 23, 2012
Filed:
Mar. 11, 2011
Masao Chaki, Hitachi, JP;
Kazuaki Kitou, Tokai, JP;
Motoo Aoyama, Mito, JP;
Masaya Ootsuka, Mito, JP;
Kouji Shiina, Mito, JP;
Masao Chaki, Hitachi, JP;
Kazuaki Kitou, Tokai, JP;
Motoo Aoyama, Mito, JP;
Masaya Ootsuka, Mito, JP;
Kouji Shiina, Mito, JP;
Hitachi-GE Nuclear Energy, Ltd., Ibaraki, JP;
Abstract
In a nuclear power plant, thermal power in a second operation cycle of a nuclear reactor is uprated from thermal power in a first operation cycle preceding the second operation cycle by at least one operation cycle. A proportion of steam extracted from a steam system and introduced to a feedwater heater, which is in particular extracted from an intermediate point and an outlet of a high pressure turbine, with respect to a flow rate of main steam, is reduced in the second operation cycle from that in the first operation cycle such that the temperature of feedwater discharged from the feedwater heater is lowered by 1° C. to 40° C. in the second operation cycle.