In a nuclear reactor (1) the chain reaction is kept under control by rods of cadmium, which reduces the rate (2) the thick concrete shield is used to slow down the speed of fast neutrons In a nuclear reactor (1) the chain reaction is kept under control by rods of cadmium which reduces the rate (2) the thick concrete shield is used to slow down the speed of fast neutrons October 18, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) , Facebook Messenger WhatsApp Share this:TwitterFacebook Related