Tritium removal

Details Tritium removal Tritium removal

1991-03-06

1994-02-01

Walsh, Donald P.

Compositions

Radioactive compositions

252632, 20415715, 376309, 376310, 376313, 376314, 976DIG381, G21F 900

Patent

active

052830101

ABSTRACT:
Where a concrete structure (12) has been contaminated with tritium (whether as gas or as water) the tritium atoms take the place of ordinary hydrogen atoms in water and in hydroxyl groups in the concrete, rendering it radioactive. The degree of contamination may be reduced by irradiating the surface with microwaves to vaporize water, while extracting water vapor from the surface region through a dust filter (28) and a water trap (30). This can considerably reduce the radioactivity, and hence the cost of disposal of the concrete.

REFERENCES:
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patent: 4565670 (1986-01-01), Miyazaki et al.
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patent: 4844838 (1989-07-01), Ohtsuka et al.
patent: 4882093 (1989-11-01), Giroux et al.
patent: 4964900 (1990-10-01), Thompson et al.
H. Yasunaka et al, "Microwave Decontaminator for Concrete Surface Decontamination in JPDR," 1987 International Decommissioning Symposium, Oct. 4-8, 1987, pp. IV-109-IV-116.

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