An fiber-optic probe for measuring the pH of coolant system of nuclear power plant and the pH measurement system using the same

摘要

The present invention relates to an optical fiber probe for measuring pH of a nuclear power plant cooling system and a pH measuring system using the same. More specifically, an outer end surface of an optical fiber inserted into a fluid channel is surrounded by a protective tube, and an end of the optical fiber exposed from the protective tube. After forming a waterproof film on the surface of the waterproof membrane, by providing a porous pH reaction membrane formed by the sol-gel method to prevent the optical fiber from being in direct contact with the high-temperature and high-pressure fluid deterioration, By impregnating the pH reactant in the porous pH reaction membrane formed through the gel method, the degradation of the pH reactant can be effectively prevented, so that the pH of the fluid under high temperature and high pressure environment, such as the cooling system of a nuclear power plant, can be accurately measured. Optical Fiber Probe for pH Measurement of Cooling System in Nuclear Power Plants One will. An optical fiber probe for pH measurement of a cooling system of a nuclear power plant according to the present invention comprises: an optical fiber made of a core and a cladding to transmit light; A protective tube formed to surround an outer circumferential surface of a portion of the optical fiber inserted into the fluid channel; A waterproof membrane connected to an end of the optical fiber exposed from the protective tube and sealing the inside of the protective tube; A pH reaction membrane provided above the waterproof membrane, and having a pH reactant impregnated with the fluid to change color depending on the pH of the fluid; And a hollow body having an opening formed at one side thereof, connected to an end of the optical fiber surrounded by the protection tube through the opening, and having a body having an inlet passing through the body to introduce fluid flowing outside the body into the body. Characterized in that comprises a; is formed a cap.