Cleaning and liquid contact with solids – Processes – Hollow work – internal surface treatment
Patent
1985-03-12
1987-11-10
Doll, John
Cleaning and liquid contact with solids
Processes
Hollow work, internal surface treatment
134167R, 134169R, 15392, B08D 904
Patent
active
047055758
ABSTRACT:
A process for separating ceramic nuclear fuels out of metallic support mers or support member parts in which there adhere the nuclear fuels, especially subsequent to the burning down of the nuclear fuels in nuclear reactors. The ceramic nuclear fuels are washed off from the support member or carrier member part by means of a liquid jet which stands under a high pressure. The liquid jet is directed against the nuclear fuel, and the pressure of the liquid is set so high, that the nuclear fuel which adheres to the support member is completely removed. The liquid jet finds the transition from the ceramic nuclear fuel to the metallic support member material such that, even at a swelling of the fuel rod, and deformation of the support member part, there is achieved an efficient detaching of the nuclear fuel. The metallic support members or support member parts hereby remain intact and are segregated after the washing off of the nuclear fuel. Only the nuclear fuel fragments are introduced into the chemical solvent.
REFERENCES:
patent: 3985572 (1976-10-01), Petermann et al.
patent: 4011100 (1977-03-01), Ross
patent: 4424769 (1984-01-01), Charamathieu et al.
patent: 4452183 (1984-06-01), Yazidjian
Cohen Sharon T.
Doll John
Kernforschungsanlage Julich Gesellschaft mit beschrankter Haftun
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