Nuclear power station hydrazine-contg. water water processing - by passing, with electrolyte addn., through water decomposition cell

摘要

In working up hydrazine-contg. waste waters from nuclear power stations, the water is passed continuously through a water decompsn. cell. A material increasing electrical conductivity is added to the water should its own conductivity be insufficient. An external electrolysis cells is used. The electrolyte can be an alkali, acid or neutral salt. The electrolysis cell consists of a 400 mm-long stainless steel pipe having dia. 30 mm. The pipe serves as cathode and contains, as anode, an electrically insulated stainless steel perforated sheet spirally wound on stainless steel rod. The water, contg. up to 300 mg/1 hydrazine to prevent corrosion, is used in nuclear power station cooling cycles. The hydrazine reacts with the atomic O, generated at water decompsn. cell anode, to form N2 and H2O. The waste water is freed from the carcinogenic hydrazine.