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. 10, 1987
Filed:
Feb. 02, 1984
Yoshiaki Nakamura, Yokohama, JP;
Tokyo Shibaura Denki Kabushiki Kaisha, Kawasaki, JP;
Abstract
A nitric acid solution of spent fuel is primarily clarified by a centrifugal clarifier so as to separate insoluble fission particles each having a size of 1.04 .mu.m or more from the solution. The primary clarified liquid is again clarified by a pulse filter device so as to remove small particles each having a size between 0.8 .mu.m and 1.04 .mu.m. The filter removes particles having a size smaller than a critical particle size of the centrifugal clarifier. Therefore, the centrifugal clarifier removes most of the fission product particles, and the filter device removes only the small fission particles. The replacement frequency of the filter is decreased, and the small particles are removed to obtain a high-quality clarified liquid.