CONTINUOUS MEASUREMENT OF IODINE CONCENTRATION IN THE PRIMARY COOLANTOF A NUCLEAR-POWER-PLANT

Kansai Electric Power Company, Ltd. together with four other utilities in Japan (Kyushu EPCO, Shikoku EPCO, Hokkaido EPCO, JAPCO) and Nuclea r Electric Ltd. have developed a reliable on-line automated Iodine Con centration Monitoring System (IMS) for use at nuclear power plants. Th is IMS uses recent technological advances to enable the detection of e ven very low Iodine concentrations in the reactor coolant water. A pat ent has recently been issued to NEL for this system design ((1)). The EGS-4 Monte Carlo Simulation Code was used to optimize the design of t his IMS. This paper describes how the EGS-4 Code was used as a design tool for the IMS and its various components.