The development of an on-line ERM system for the research reactors in Korea

A real-time on-line environmental radiation monitoring (ERM) system for the research reactor sites of Daejeon and Seoul is established. In the Daejeon site, a radio communication method with a radiofrequency of 468.8 MHz is used between the main computer and the six posts inside the Daejeon research reactor site. A general telephone communication method by a dial modem is applied between the main computer and a comparison point with one post outside the Daejeon research reactor site. In the Seoul site, a null modem communication method is employed between a sub-computer and the three posts inside the Seoul research reactor site, and a high-speed communication network such as ADSL is used between the sub-computer in the Seoul site and the main computer in the Daejeon site. Consequently, the real-time data from a total of 10 places is displayed on-line on a screen and it is statistically treated.