Radioactive concentration measuring apparatus

Details Radioactive concentration measuring apparatus Radioactive concentration measuring apparatus

1984-07-09

1986-05-27

Howell, Janice A.

Radiant energy

Invisible radiant energy responsive electric signalling

250432R, G01J 100

Patent

active

045917167

ABSTRACT:
This invention relates to an apparatus for measuring the radioactive concentration of a radioactive material-containing liquid. In order to improve the measuring sensitivity of and miniaturize the apparatus, it includes a vertically-disposed outer cylinder, an inner cylinder disposed in and concentrically with the outer cylinder, a radiation detector disposed in the inner cylinder, a radioactive liquid feed means for supplying a radioactive material-containing liquid in the form of an annular current into an annular space between the inner and outer cylinders, a first cleaning water feed means for supplying a cleaning liquid along the inner surface of the outer cylinder, and a second cleaning water feed means for supplying a cleaning liquid along the outer surface of the inner cylinder. The cleaning water prevents the radioactive material from being deposited on the inner surface of the outer cylinder and the outer surface of the inner cylinder, and the measuring sensitivity of the apparatus from decreasing.

REFERENCES:
patent: 2738426 (1956-03-01), Hurst
patent: 4201917 (1980-05-01), Graentzel
patent: 4495420 (1985-01-01), Chudy et al.

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