Early in 2007, Lloyd's Register began research into the implications of nuclear propulsion for merchant ships. This initiative was built on Lloyd's Register's extensive experience in the traditional nuclear industries and from studies that led to the formation of its Rules for the Nuclear Propulsion of Ships.
The rules, available from 1966 until 1976, were developed in response to the interest shown in nuclear propulsion in the early 1960s, which resulted in ships such as Savannah and Otto Hahn, two ships that were technically successful.
At that time, operational and economic conditions were not conducive to commercial success of nuclear propulsion. But both ships, nevertheless, traded worldwide for some years.