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:
Jun. 02, 2015
Filed:
Oct. 11, 2013
Japan Atomic Energy Agency, Ibaraki, JP;
Sukegawa Electric Co., Ltd., Ibaraki, JP;
Tomoaki Takeuchi, Higashi-ibaraki, JP;
Hiroshi Nagata, Higashi-ibaraki, JP;
Noriaki Ohtsuka, Higashi-ibaraki, JP;
Akira Shibata, Higashi-ibaraki, JP;
Kunihiko Tsuchiya, Higashi-ibaraki, JP;
Kuniaki Miura, Takahagi, JP;
Hiroshi Yamamoto, Naka, JP;
Japan Atomic Energy Agency, Ibaraki, JP;
Sukegawa Electric Co., Ltd., Ibaraki, JP;
Abstract
A self-powered gamma detector which can hold the influence of neutron rays to the minimum, and can measure the dose of gamma rays accurately under a high neutron environment in the reactor is disclosed. The self-powered gamma detector has a columnar emitter member; a collector member arranged in surroundings of the emitter member through an insulating member, and the strength of gamma rays is measured by detecting the value of a current which flows between the emitter member and an MI cable connected with the emitter member, and the collector member. Especially, the emitter member consists of pure tungsten (W), whose inevitable impurities is in 0.03 percent by weight or less.