On 24 March 1992, the number 3 power generating unit at the Leningrad Atomic Power Station in Sosnovyi Bor underwent an emergency shutdown. The plant suffered a steam leak, which spewed a total of some 3 thousand curies into the atmosphere.
It underwent an emergency shutdown
( z1 undergo :ARG1 ( z2 it ) :ARG2 ( z3 shut-down :mod ( z4 emergency ) ) )