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. 11, 2014
Filed:
Nov. 10, 2010
Satoru Aoike, Tokai, JP;
Masaaki Tanaka, Hitachi, JP;
Koichi Kurosawa, Hitachi, JP;
Shinobu Okido, Mito, JP;
Shinya Ohmori, Mito, JP;
Satoru Aoike, Tokai, JP;
Masaaki Tanaka, Hitachi, JP;
Koichi Kurosawa, Hitachi, JP;
Shinobu Okido, Mito, JP;
Shinya Ohmori, Mito, JP;
Hitachi-GE Nuclear Energy, Ltd., Ibaraki, JP;
Abstract
Even a site having a complicated curved surface shape, such as a welded spot on a bottom of a nuclear reactor core, is simply and electrolytically etched without discharging an etching liquid in a large amount, whereby grain boundary on the surface of the nuclear reactor core internals can be confirmed visually. When the surface of nuclear reactor core internals is electrolytically etched, a sponge provided with holes having a communicating structure is integrated with an etching liquid, and the etching liquid is gelled, while the integrated combination is disposed in front of an electrode, followed by the application of voltage to turn on electricity at a state in which said electrode is electrically connected to the cathode of a direct-current power supply, and brought into contact with or approximated to the surface of the core internals electrically connected to the anode of the direct-current power supply.