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. 16, 1988
Filed:
Oct. 27, 1986
Applicant:
Inventors:
Tadamasa Hayashi, Kanagawa, JP;
Toyoshi Mizushima, Kanagawa, JP;
Assignee:
Ebara Corporation, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G21F / ;
U.S. Cl.
CPC ...
252629 ; 252628 ; 252631 ; 501 41 ; 501 49 ; 501 52 ; 501155 ;
Abstract
A process is disclosed for volume reduction and solidification of a radioactive waste solution mainly composed of sodium borate and discharged from a pressurized water reactor. The process comprises adding to said radioactive waste solution, ZnO or a mixture of ZnO with Al.sub.2 O.sub.3 and/or CaO, and then subjecting the resulting mixture to dehydration and melting to produce a vitrified solid solution. Said process is safe and reliable. A vitrified solid solution produced by said process is safe and stable.