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. 15, 2015
Filed:
Sep. 12, 2011
Chang Hwan Shin, Daejeon, KR;
Kang Hee Lee, Daejeon, KR;
Dong-seok OH, Daejeon, KR;
Wang Kee IN, Daejeon, KR;
Tae Hyun Chun, Daejeon, KR;
Kun Woo Song, Daejeon, KR;
Chang Hwan Shin, Daejeon, KR;
Kang Hee Lee, Daejeon, KR;
Dong-Seok Oh, Daejeon, KR;
Wang Kee In, Daejeon, KR;
Tae Hyun Chun, Daejeon, KR;
Kun Woo Song, Daejeon, KR;
Korea Atomic Energy Research Institute, Daejeon, KR;
Korea Hydro and Nuclear Power Co., Ltd., Seoul, KR;
Abstract
A dual-cooled fuel rod's spacer grid with upper and lower dimples, including a blocking area of a flow passage that coolant flows through is reduced and dual-cooled fuel rods are supported, and reduces a turbulent flow of the coolant as well as vibrations of the dual-cooled fuel rods, thereby lessening fretting damage done to the rods. The spacer grid includes a plurality of unit grid straps, each of which includes a body disposed in a vertical direction, an upper dimple protruding from an upper portion of the body, and a lower dimple spaced apart from the upper dimple in a downward direction and protruding from a lower portion of the body. The unit grid straps form a grid structure that have inner grid holes into which the dual-cooled fuel rods are held, and the held dual-cooled fuel rods are each supported in four directions by the upper and lower dimples.