Radiant energy – Fluent material containment – support or transfer means – With irradiating source or radiating fluent material
Patent
1992-11-04
1994-01-04
Fields, Carolyn E.
Radiant energy
Fluent material containment, support or transfer means
With irradiating source or radiating fluent material
250364, 25037002, 250435, G01T 120, G01T 708
Patent
active
052763323
ABSTRACT:
Apparatus for measuring the .alpha. activity of a solution and used for determining the plutonium concentration of a solution sampled from an irradiated nuclear fuel reprocessing installation and which comprises a rotary drum (20), which samples a film of solution in a vessel (20), in order to place it in front of a measuring probe (22). Between the probe (22) and the drum (20) is positioned a sealing disk (40) having three positions, which has an effective measuring region (48), a measuring chain quality checking region and a blank measuring region. In order to avoid a solution deposit by condensation on the disk (40) or on the end of the probe (22), a protective gas injection system (49) having passages traversing the vessel cover (16), scavenges the upper face of the sealing disk at three locations corresponding to the three active regions of the latter. A substantially uniform distribution of the gas flow between said three locations is ensured. The protective gas is then sucked in by a tube (122).
REFERENCES:
patent: 3826918 (1974-07-01), Van Der Koogh et al.
"Measurement System for Alpha Emittors In Solution", Nuclear Instruments & Methods in Physics Research, vol. 225, No. 1, Aug., 1984, pp. 179-184.
"Detector for Radiation", Patent Abstracts of Japan, vol. 7 No. 282 (P-243) (1427) Dec. 16, 1983 and JP-A-58 156 876 (Tokyo Shibaura Denki K.K.) Sep., 1983.
Durand Marcel
Marteau Claude
Cogema (Compagnie Generale des Matieres Nucleaires)
Fields Carolyn E.
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