当反应堆的快中子打到一次回路中的重水时,产生下述反应:~(16)O(n,p)~(16)N~*■~(15)O+γ所释放的γ射线主要有6.13MeV和7.12MeV。由于~(16)N~*具有7.13秒的半衰期,从而这种穿透力强的高能γ射线将会给反应堆生成物屏蔽层之外的环境造成辐射危 When the reactor’s fast neutron hits the heavy water in the primary circuit, the following reaction occurs: γ-rays released by ~ (16) O (n, p) ~ (16) N ~ * ■ ~ (15) O + γ There are mainly 6.13 MeV and 7.12 MeV. Since ~ (16) N ~ * has a half-life of 7.13 seconds, this high-penetrating, high-energy γ-ray will cause a radiation hazard to the environment outside the shielding of the reactor product