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:
Dec. 08, 1981
Filed:
Jul. 30, 1980
Applicant:
Inventors:
Assignees:
Hitachi, Ltd., Tokyo, JP;
The Tokyo Electric Power Co., Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ; G01N / ;
U.S. Cl.
CPC ...
250304 ; 250428 ;
Abstract
A radioactivity monitoring system capable of exactly detecting the concentration of .sup.131 I in a gas even in a low concentration is disclosed in which a sample gas is passed through a filter cartridge filled with an iodine absorbing material to accumulate iodine, radiation is counted on both entrance and exit sides of the filter cartridge, the absorption distribution of iodine absorbed in the filter cartridge is estimated from the ratio between respective counts obtained on the entrance and exit sides, and one of the counts is corrected by the estimated absorption distribution of iodine to calculate the radioactivity concentration of .sup.131 I in the gas.