Analysis of EMI Test on Digital System for Integral Reactor

Due to the recent development of computer engineering and digital technology, modern digital instrumentation and control systems are being innovatively developed in industrial plants and the conservative atomic energy related I and C systems in nuclear power plants are also showing a tendency to replace some analog equipment with digital one through restrictive introduction of new technologies. Because of high operating frequency and low operating voltage, digital equipment is recognized to be weak in electromagnetic interference compared with analog equipment. As most I and CS system in Integral Reactor such as SMART are composed of digital equipment which is relatively vulnerable of environmental conditions. The inspection of instruments against electromagnetic interference is indispensable. The I and C equipment and system should be designed and tested to verify the compatibility with requirements of electromagnetic interference in Reg. Guide 1.180 and EPRI-TR-102323 This paper involves the test details and result analysis according to the standard of electromagnetic waves targeting on some equipment of the Integral Reactor digital I and C systems, and the test result analysis will be used in designing each equipment