Apparatus and method for sampling underwater radioactive solution

A sampling method for underwater radioactive solution, comprising the steps of:

• providing a sampling apparatus for underwater radioactive solution, the sampling apparatus comprising a main unit, a connecting rod, a connecting ring, a container unit, a solution access channel, a motor having a piston, a holder, a synchronizing connector, a control unit, flexible pipes, and a depth-setting unit, wherein the depth-setting unit is disposed on outer walls of the main unit, the control unit is used to control the operation of the piston of the motor, and the synchronizing connector is used to connect the connecting rod to the piston of the motor, so as to synchronize the back-and-forth movement of the connecting rod with the air pressure of the motor;
• setting an underwater depth for the depth-setting unit;
• putting the sampling apparatus in a radioactive reservoir of nuclear facilities or in the container of said reservoir at the underwater depth;
• controlling the operation of the piston of the motor with the control unit and thus move the connecting rod backward to draw in the solution sample;
• taking the sampling apparatus out of the radioactive reservoir or the container;
• and
• controlling the operation of the piston of the motor with the control unit and thus move the connecting rod forward to extract the solution sample out.