Pretty sure the ML-1 was the shippable one. It was gas-cooled and portable. The SL-1 that had the accident was a BWR intended to power arctic radar stations abo

Pretty sure the ML-1 was the shippable one. It was gas-cooled and portable. The SL-1 that had the accident was a BWR intended to power arctic radar stations above the DEW line. Too big to ship easily. These two reactors were part of the same Army program. https://whatisnuclear.com/reactor_history.html#the-army-nuclear-power-program https://whatisnuclear.com/reactor_history.html#the-army-nucl... M meant mobile. S meant stationary. L means low-power.