Online yield measurement of H produced in water radiolysis

Yamashita, Shinichi; Katsumura, Yosuke; Hiroishi, Daisuke*; Murakami, Takeshi*

Yield of dihydrogen molecule (H) produced in water radiolysis is important for safety management in nuclear industry including water chemistry in nuclear fission reactors as well as for investigation of very early stages of radiation-induced phenomena, which are closely related to spatial distribution of energy deposition from charged particle to surrounding matter. A new apparatus for online measurements of H produced in water radiolysis, and the apparatus was utilized for -irradiation. By improving tubing between a sample cell and thermal conductivity detector, which are settled inside and outside the irradiation room, respectively, sensitivity and accuracy of the system has much improved and resultant H yield was almost same as those reported in literatures.