In 1942 Kurchatov declared: "At breaking up of kernels in a kilogram of uranium, the energy released must be equal to the explosion of 20,000 tons of trotyl."
1942年，庫爾恰托夫宣佈：「一公斤的鈾核進行分裂後，釋放出來的能量與20,000噸TNT炸藥相等。