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1. (WO1998053462) A METHOD FOR CLEANING RADIOACTIVELY CONTAMINATED MATERIAL
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1998/053462 International Application No.: PCT/GB1998/001212
Publication Date: 26.11.1998 International Filing Date: 24.04.1998
Chapter 2 Demand Filed: 20.11.1998
IPC:
G21F 9/00 (2006.01) ,G21F 9/30 (2006.01)
G PHYSICS
21
NUCLEAR PHYSICS; NUCLEAR ENGINEERING
F
PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
9
Treating radioactively contaminated material; Decontamination arrangements therefor
G PHYSICS
21
NUCLEAR PHYSICS; NUCLEAR ENGINEERING
F
PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
9
Treating radioactively contaminated material; Decontamination arrangements therefor
28
Treating solids
30
Processing
Applicants:
BRITISH NUCLEAR FUELS PLC [GB/GB]; Risley Warrington Cheshire WA3 6AS, GB (AT, AU, BE, CA, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, JP, KR, LU, MC, NL, PT, RU, SE, UA)
RUSHTON, Alan [US/US]; US (UsOnly)
ARMIT, James, Clark [GB/GB]; GB (UsOnly)
Inventors:
RUSHTON, Alan; US
ARMIT, James, Clark; GB
Agent:
COWKING, Harry; British Nuclear Fuels plc IP & Patents Dept. Risley Warrington Cheshire WA3 6AS, GB
Priority Data:
9709882.616.05.1997GB
Title (EN) A METHOD FOR CLEANING RADIOACTIVELY CONTAMINATED MATERIAL
(FR) PROCEDE DE NETTOYAGE DE MATERIAU RADIOACTIVEMENT CONTAMINE
Abstract:
(EN) Radioactively contaminated material is cleaned by contacting the material with a decontaminating liquid comprising an aqueous solution of nitric acid containing an NOx generating agent. The NOx generating agent may by a nitrite, for example, sodium nitrite, or a ferrous metal. The material to be cleaned may comprise a plastics material contaminated with uranium or other actinides. Cleaning is effected by placing the material in a rotatable, apertured vessel in which the material is subjected to a leaching cycle by contact with the decontaminating liquid and then a washing cycle in which the material is contacted with a washing liquid.
(FR) On nettoie le matériau radioactivement contaminé en le mettant en contact avec un liquide de décontamination comprenant une solution aqueuse d'acide nitrique contenant un agent générant du NOx. Cet agent peut être un nitrite, tel que du nitrite de sodium, ou un métal ferreux. Le matériau à nettoyer est un matériau plastique contaminé par de l'uranium ou d'autres actinides. Pour nettoyer le matériau considéré, on le place dans un récipient rotatif à orifices dans lequel le matériau subit un cycle de lixiviation consistant à mettre le matériau en contact avec le liquide de décontamination, puis un cycle de lavage consistant à mettre le matériau en contact avec le liquide de lavage.
Designated States: AU, CA, JP, KR, RU, UA, US
European Patent Office (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
KR1020010006345ZA1998/03908EP0981820US6231683JP2001525937 CA2288761
AU1998070698