Discordance monitoring system for Kamini nuclear channels

The KAMINI (Kalpakkam Mini) reactor is an experimental thermal reactor using ²³³U as fuel. The reactor is provided with instruments to monitor neutron flux and initiate safety actions. Due to high leakage current in MRDC channel and the difficulty in maintenance faced on all these channels due to component obsolescence, it was decided to revamp the KAMINI nuclear instrumentation. During revamping, the online detection of cable discontinuity provided in the older channels was dispensed with due to spurious trips. In order to ensure that the nuclear channels are healthy, a dedicated Discordance Monitoring system was designed, developed and implemented in KAMINI. (author)