A Water Radiolysis Code for the Irradiation Loop System

In order to evaluate the water chemistry in the irradiation field during IASCC irradiation test, a water radiolysis code for the irradiation loop system was developed. In the water radiolysis code, a multiple node model was introduced since the irradiation loop system has a wide rage temperature distribution as well as dose distribution. To investigate applicability of the developed water radiolysis code, water chemistry at the water sampling point of the irradiation loop system was measured and compared with analytical results under several water chemistry conditions. Further, water chemistry distribution in the in-pile region as well as in the out-pile region was calculated by the developed water radiolysis code.