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Numerical Analysis on Decay Heat Power of Weapon-Grade Plutonium

In order to exactly master effect of plutonium material’s heat power on safety and reliability of nuclear weapon, weapon-grade plutonium(WgPu) was regarded as research object in this paper. According to its component, decay heat power of WgPu per kilogram was calculated through dynamic decay cascade and decay law of plutonium. The maximum decay heat power of WgPu is 2.6158 watt per kilogram at seventy years.