Radon reduction apparatus

1. A radon reduction apparatus for groundwater having a disinfection means, comprising:

an agitation space forming body that groundwater fed through a groundwater feed pipe passes through before inflow into a groundwater storage tank and that forms a water turbine installation space whose top portion is not filled with groundwater;

a water turbine located in the water turbine installation space to be rotated by groundwater when the fed groundwater falls, is run against a bottom and scattered;

an oxygen supply means supplying oxygen to groundwater before inflow of the groundwater to the agitation space forming body;

a ventilating fan that is rotated by receiving rotary power of the water turbine and that is connected to the water turbine installation space to discharge air of the water turbine installation space;

an antiseptic solution supply means supplying antiseptic solution to be mixed with the groundwater, and

wherein an agitation space, in which a predetermined amount of fed groundwater is delayed while going through the agitation space before inflow into the groundwater storage tank, is formed on a lower portion of the water turbine installation space in the agitation space forming body, and

an agitation screw located in the agitation space to stir the groundwater and the antiseptic solution inside the agitation space by being rotated by rotary power transmitted from the water turbine is further included, and

wherein in the antiseptic solution supply means, the antiseptic solution automatically flows in the groundwater feed pipe by an orifice, and

in the oxygen supply means, air automatically flows in the groundwater feed pipe by the orifice, and

wherein a partition is installed in the agitation space, thereby the groundwater flowing in the agitation space is discharged in the agitation space after flowing along a predetermined route.

2. The radon reduction apparatus of claim 1 , wherein a plurality of groundwater collection spaces are formed on a circumferential surface and a groundwater collection space of the plurality of groundwater collection spaces is blocked in every direction, thereby a process that falling water gathers and falls again is repeated in the water turbine.

3. The radon reduction apparatus of claim 1 , wherein the antiseptic solution supply means includes a flow control valve installed to control a supply amount of the antiseptic solution, and

the oxygen supply means includes an oxygen supply control valve installed to control a supply amount of oxygen.

4. The radon reduction apparatus of claim 1 , wherein an overflow pipe is connected at a portion spaced apart from a bottom in the agitation space and a drain pipe connected to the bottom in the agitation space is included so that a groundwater of the agitation space flows in the groundwater storage tank.

5. The radon reduction apparatus of claim 4 , wherein an inside cross-sectional area of the drain pipe is smaller than an inside cross-sectional area of the groundwater feed pipe and the overflow pipe or a displacement control valve for controlling drain through the drain pipe is further included.