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:
Nov. 23, 1993
Filed:
Sep. 16, 1992
Applicant:
Inventors:
Yasuhisa Ikeda, Kashiwa, JP;
Yoshiyuki Yasuike, Kashiwa, JP;
Makoto Yamaguchi, Kashiwa, JP;
Hiroaki Kobayashi, Nakaminato, JP;
Hiroshi Igarashi, Katsuta, JP;
Assignee:
Doryokuro Kakunenryo Kaihatsu Jigyodan, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G21F / ;
U.S. Cl.
CPC ...
252629 ; 252626 ; 252631 ; 252633 ; 588252 ;
Abstract
A salt waste composed mainly of chlorides, which is generated from the step of a molten salt electrolytic purification in dry reprocessing of a spent metallic nuclear fuel, is reacted with boric acid at high temperature to convert the chlorides in the salt waste into oxides. The resulting oxides of the salt waste are easily vitrifiable, and a vitrification product is obtained by adding a vitrifying additive to the oxides, heat-melting the mixture to form a molten mixture and cooling the molten mixture.