Radiant energy – Geological testing or irradiation
Patent
1988-07-15
1989-11-14
Howell, Janice A.
Radiant energy
Geological testing or irradiation
250255, G01V 500
Patent
active
048809730
ABSTRACT:
An in-situ radon flux sampling device for accommodating a canister (22) of radon adsorption material for measurement of radon gas emanating from the ground. The device includes a holder body (10) for the removable cannister (22). The body (10) is inserted into the ground, thusly providing for sealing with and steady support in the ground. The holder body (10) is equipped with a plurality of vent holes (29) to keep radon gas flow and concentration sampling conditions substantially the same as would be encountered above the soil in absence of the sampling device. The holder body (10) for further accomodates a removable barrier filter (26) for substantial avoidance of contamination of the adsorption material by particulate matter and moisture from the soil, as well as by moisture from the atmosphere. The holder body (10) includes a removable cap (12) having one or more vent holes (14) therein. The holder body (10) and its cap (12) are easily cleanable and reusable.
REFERENCES:
patent: 3968371 (1976-07-01), Greendale
patent: 4017731 (1977-04-01), Howell et al.
patent: 4352014 (1982-09-01), Powell
patent: 4385236 (1983-05-01), Hassib et al.
patent: 4518860 (1985-05-01), Alter et al.
patent: 4700067 (1987-10-01), Carossi et al.
patent: 4700070 (1987-10-01), Kovac
"Radon Flux Measurement Technology," Freeman and Hartley, Indoor Radon, Feb. 1986.
Howell Janice A.
Nguyen T.
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