Apparatus for removing cladding material from bottom portion of

Details Apparatus for removing cladding material from bottom portion of Apparatus for removing cladding material from bottom portion of

1984-06-01

1985-08-13

Nelson, Peter A.

Induced nuclear reactions: processes, systems, and elements

Fission reactor material treatment

Impurity removal

376316, 376353, 15320, G21C 1942

Patent

active

045349320

ABSTRACT:
A device for removing a cladding material from a bottom portion of a control rod guide tube of a nuclear reactor. A rotor tube is removably mounted in a housing of a control rod drive of the nuclear reactor and has at least its forward end portion hydraulically insertable into the bottom portion of the control rod guide tube through an opening located in a lower portion of the control rod guide tube for inserting the control rod drive. The rotor tube is provided at the forward end portion thereof with a foldable rotary brush and cleaning water supply nozzles. A rotary drive shaft is extending through the rotor tube for rotating the rotary brush. The cladding material deposited on the bottom portion of the control rod guide tube that has become radioactive can be readily and positively removed therefrom with a small volume of water while enabling the risk of exposure to radiation to be minimized at a time the operation of cleaning the bottom portion of the control rod guide tube is performed.

REFERENCES:
patent: 4079701 (1978-03-01), Hickman et al.
patent: 4272017 (1981-06-01), Franz
patent: 4456440 (1984-06-01), Korner
patent: 4461650 (1984-07-01), Ozawa
patent: 4470952 (1984-09-01), Vassalotti
Knox, Nuclear Eng'g-Int., Decontamination Cuts Costs, Jan. '83, pp. 26-28.

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