UV reaction apparatus for treating waste liquid caused by system decontamination in nuclear power plant
Provided is a UV reaction apparatus for treating waste liquid caused by system decontamination in a nuclear power plant. The UV reaction apparatus comprises a UV irradiation unit for irradiating UV light as a bar-shaped body; and a transit unit accommodating the UV irradiation unit therein, and for passing organic waste liquid to be irradiated with the UV light, wherein the transit unit comprises, an input unit, into which the organic waste liquid is input a discharge unit, through which the organic waste liquid is discharged, and an intermediate unit located between the input unit and the discharge unit, and in which the UV irradiation unit is located.
1 . A UV reaction apparatus for treating organic waste liquid caused by system decontamination in a nuclear power plant comprising:
a UV irradiation unit for irradiating UV light as a bar-shaped body; and
a transit unit accommodating the UV irradiation unit therein, and for passing the organic waste liquid to be irradiated with the UV light,
wherein the transit unit comprises,
an input unit, into which the organic waste liquid is input,
a discharge unit, through which the organic waste liquid is discharged, and
an intermediate unit located between the input unit and the discharge unit in a height direction, and in which the UV irradiation unit is located,
wherein a plurality of piece-shaped partition wall units are provided on an inner circumferential surface of the intermediate unit,
a separation state in the height direction between individual piece-shaped partition wall units of the plurality of piece-shaped partition wall units is arranged so as to gradually narrow in a direction from the input unit towards the discharge unit.
2 . The UV reaction apparatus of claim 1 , wherein the UV irradiation unit is provided in plural so as to be adjacent to each other,
wherein the plurality of piece-shaped partition wall units allow the organic waste liquid input on the inner circumferential surface of the intermediate unit to stagnate in the intermediate unit so that time, during which the organic waste liquid is exposed to the UV light, is extended.
3 . The UV reaction apparatus of claim 1 further comprises,
a buffer tank for performing circulation operation with the transit unit,
wherein the buffer tank, into which the organic waste liquid irradiated with the UV light is input, inputs the organic waste liquid into the transit unit to increase frequency of exposure of the organic waste liquid to the UV light on the transit unit.
4 . The UV reaction apparatus of claim 3 further comprises,
an analysis unit for obtaining a total organic carbon (TOC) analysis value of the organic waste liquid on the transit unit,
wherein the circulation operation is repeated until the TOC analysis value reaches a preset value.
5 . The UV reaction apparatus of claim 4 , wherein the analysis unit is provided on a side of the UV reaction apparatus including the input unit and a side of the UV reaction apparatus including the discharge unit, respectively, to perform analysis.