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1. (WO1998050922) METHOD FOR TREATING METALLIC WASTE CONTAMINATED BY RADIONUCLIDES
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1998/050922 International Application No.: PCT/RU1997/000138
Publication Date: 12.11.1998 International Filing Date: 08.05.1997
Chapter 2 Demand Filed: 26.11.1998
IPC:
C22B 7/00 (2006.01) ,G21F 9/00 (2006.01) ,G21F 9/30 (2006.01)
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
B
PRODUCTION OR REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
7
Working-up raw materials other than ores, e.g. scrap, to produce non-ferrous metals or compounds thereof
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:
ZAKRYTOE AKTSIONERNOE OBSCHESTVO INNOVATSIONNAYA KOMPANIA 'PANORAMA' [RU/RU]; ul. Malenkovskaya, 14-1 Moscow, 107114, RU (AllExceptUS)
KONSTANTINOV, Evgeny Alexandrovich [RU/RU]; RU (UsOnly)
KIZHNEROV, Leonid Vasilevich [RU/RU]; RU (UsOnly)
KORABLEV, Nikolai Alexeevich [RU/RU]; RU (UsOnly)
SHUISKY, Dorian Borisovich [RU/RU]; RU (UsOnly)
OLEINIK, Mikhail Sergeevich [RU/RU]; RU (UsOnly)
TROFIMOV, Vladimir Viktorovich [RU/RU]; RU (UsOnly)
GUSYNIN, Valery Danilovich [RU/RU]; RU (UsOnly)
Inventors:
KONSTANTINOV, Evgeny Alexandrovich; RU
KIZHNEROV, Leonid Vasilevich; RU
KORABLEV, Nikolai Alexeevich; RU
SHUISKY, Dorian Borisovich; RU
OLEINIK, Mikhail Sergeevich; RU
TROFIMOV, Vladimir Viktorovich; RU
GUSYNIN, Valery Danilovich; RU
Agent:
TOVARISCHESTVO S OGRANICHENNOY OTVETSTVENNOSTYU PATENT LAW FIRM 'JUS'; a/ya 184, PLF "JUS" Moscow, 103009, RU
Priority Data:
Title (EN) METHOD FOR TREATING METALLIC WASTE CONTAMINATED BY RADIONUCLIDES
(FR) PROCEDE DE TRAITEMENT DE DECHETS METALLIQUES CONTAMINES PAR DES RADIONUCLEIDES
Abstract:
(EN) The present invention relates to methods for treating metallic waste contaminated by radionuclides, wherein one of said methods comprises deactivating the metallic waste in a liquid medium using an etching solution, a cleaning solution and water. The metallic waste is then melted in an induction furnace while adding refining fluxing agents thereto. The ingots are further submitted to a dosimetric control before solidifying the etching solution. The deactivation of the metallic waste in a liquid medium is first carried out using the etching solution that contains from 5 to 200 g/l of a strong acid and from 0.1 to 15 g/l of a sulphur-containing activator or corrosion inhibitor at a temperature of between 10 and 100 °C. The method further comprises applying the cleaning solution that contains from 2 to 100 g/l of a strong acid and from 1 to 20 g/l of an oxidant at a temperature of between 10 and 90 °C before carrying out the treatment using water. The metal ion concentration in the etching solution is monitored so that in case said concentration exceeds a predetermined value, a portion of said solution is removed for solidification while the corresponding portion of the remaining solution is strengthened using a strong acid. During the melting process, the content of refining fluxing agents relative to the metal is kept in a range of between 0.9 to 4 wt.%.
(FR) Cette invention concerne des procédés de traitement de déchets métalliques qui ont été contaminés par des radionucléides. L'un de ces procédés consiste à effectuer une désactivation en milieu liquide des déchets métalliques, ceci en utilisant une solution d'attaque, une solution de nettoyage et de l'eau. Les déchets métalliques sont ensuite fondus dans un four à induction en y rajoutant des agents fluxants de raffinage. Les lingots sont ensuite soumis à un contrôle dosimétrique avant de solidifier la solution d'attaque. La désactivation en milieu liquide des déchets métalliques se fait tout d'abord à l'aide de la solution d'attaque qui contient de 5 à 200 g/l d'un acide fort et de 0,1 à 15 g/l d'un activateur contenant du soufre ou d'un inhibiteur de corrosion, ceci à une température allant de 10 à 100° C. On effectue ensuite le traitement à l'aide de la solution de nettoyage qui contient de 2 à 100 g/l d'un acide fort et de 1 à 20 g/l d'un oxydant, ceci à une température allant de 10 à 90° C et avant d'effectuer le traitement à l'eau. On contrôle la concentration d'ions de métaux présents dans la solution d'attaque et, lorsque cette concentration dépasse une valeur prédéterminée, on élimine une partie de ladite solution que l'on solidifie, la partie correspondante de solution restante étant renforcée à l'aide d'un acide fort. Lors de la fusion, le contenu en produits fluxants de raffinage par rapport au métal varie de 0,9 à 4 % en poids.
Designated States: AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, CA, CH, CN, CU, CZ, DE, DK, EE, ES, FI, GB, GE, HU, IL, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, TJ, TM, TR, TT, UA, UG, US, UZ, VN
African Regional Intellectual Property Organization (ARIPO) (GH, KE, LS, MW, SD, SZ, UG)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, CH, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, ML, MR, NE, SN, TD, TG)
Publication Language: Russian (RU)
Filing Language: Russian (RU)
Also published as:
RU02168780AU1997037889