Hazardous or toxic waste destruction or containment – Destruction or containment of radioactive waste – By fixation in stable solid media
Patent
1994-12-19
1998-03-24
Mai, Ngoclan
Hazardous or toxic waste destruction or containment
Destruction or containment of radioactive waste
By fixation in stable solid media
588 20, 588 19, 976DIG351, 976DIG384, 976DIG385, G21F 916, G21F 908
Patent
active
057323623
ABSTRACT:
The present invention relates to a method for treating radioactive laundry waste water generated from a nuclear power plant, nuclear fuel reprocessing plant, or radioactive nuclides handling facilities, and provides a method for treating the waste water safely and for reducing the volume of generated radioactive waste to a minimum.
Radioactive laundry waste water containing a detergent of which major contents are a nonionic surface active agent and inorganic builders is concentrated by an evaporating concentrator, the concentrated waste water is dried and pulverized to dry powder by a rotary centrifugal thin film dryer, and the dry powder is incinerated. By using the above detergent, foaming at the concentration can be reduced, and the concentrated waste water can be easily dried and pulverized. Further, the dried powder can be incinerated stably and safely without influencing undesirable effect on the body of the incinerator.
In accordance with the present invention, laundry waste water can be treated simply and safely, and the final volume of radioactive waste can be reduced to minimum.
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Verot, J.L. et al., Study of the Problems posed by the Treatment of Effluents Containing Detergents and Complexing Agents, Nuclear Science Abstracts, 23(6), 9507, 1969.
Hattori Yasuo
Izumida Tatsuo
Kikkawa Ryozo
Kiuchi Yoshimasa
Tsuchiya Hiroyuki
Hitachi , Ltd.
Hitachi Engineering & Services Co. Ltd.
Hitachi Nuclear Engineering Co., Ltd.
Mai Ngoclan
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