Possible approach to cleaning 'problematic' LRW with large contents of suspended particles, oils and other organic substances

Conference · Sun Jul 01 04:00:00 EDT 2007

OSTI ID:21156342

Ilin, V; Karlin, Yu; Laurson, A; Volkov, Eu; Dmitriev, S ^[1]

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1. Moscow Scientific Industrial Association 'Radon' (Russian Federation)

A general structural scheme for cleaning 'problematic' liquid radioactive wastes (LRW) containing a large amount of suspended particles, oils and other organic substances has been proposed. The technological scheme includes two main stages: 1) separation of suspended particles, oil product emulsions and the larger part of colloidal particles from LRW by filtration, 2) purification of radioactive waters from radionuclides by membrane-sorption to the levels of radiation safety norms applied. The filtration stage is considered as a three-step process of 'problematic' LRW treatment including: 1) 'problematic' LRW extraction from storage tanks with a robot type device intended for washing out the bottom sediment (slurry), 2) separation of suspended particles, oil product emulsions and larger part of colloidal particles from LRW by filtration through porous or gauze diaphragms of 0.1 to 10 {mu}m pores (cells) in size, 3) concentration of separated slurry up to 100-200 g/l. Two main options of the membrane-sorption technologies, AQUA-EXPRESS and Reverse Osmosis, for LRW purification have been considered. Two possible options of porous or gauze diaphragms productivity and lifetime increase between their surface regenerations have been shown: 1) possibility of an oxidizer introduction into initial LRW, 2) possibility to rotate a filtering element (disk or cylinder type). (authors)

• Research Organization: American Society of Mechanical Engineers (ASME), Three Park Avenue, New York, NY 10016-5990 (United States); Technological Institute of the Royal Flemish Society of Engineers (TI-K VIV), Het Ingenieurshuis, Desguinlei 214, 2018 Antwerp (Belgium); Belgian Nuclear Society (BNS) - ASBL-VZW, c/o SCK-CEN, Avenue Hermann Debrouxlaan, 40 - B-1160 Brussels (Belgium)
• OSTI ID: 21156342
• Country of Publication: United States
• Language: English

Related Subjects

12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
CYLINDERS
EMULSIONS
EXTRACTION
FILTRATION
LOW-LEVEL RADIOACTIVE WASTES
OILS
OSMOSIS
OXIDIZERS
POROUS MATERIALS
PRODUCTIVITY
PURIFICATION
RADIATION PROTECTION
RADIOACTIVE WASTE PROCESSING
ROBOTS
SEDIMENTS
SLURRIES
SORPTION
WASHING