Although they did not know it at the time, the seamen of the USS Cony and other ships of the Randolph group were moments away from being killed or shipwrecked by the tremendous waves that a nuclear explosion would produce. Savitsky’s torpedo carried a warhead with 10 kilotons of explosive power.  If dropped on a city, that would suffice to kill everyone with a half-mile radius. Moreover, the torpedoes’ nuclear warheads were designed to create shock waves that would topple or incapacitate ships. The 20-kiloton load tried by the US Navy in the Baker underwater test in 1946 produced waves up to 94 feet high. The Soviets tested their T-5 torpedoes near Novala Zemlia in the Arctic in 1957 but never released the results. Any ship hit by the torpedo would almost certainly have been destroyed, while the rest of the Randolph group would have suffered significant damage.

That is from the new book on this topic by Serhii Plokhy. An excellent book, with much more on the Soviet side than any other source I am aware of.