Nuclear meltdown of fission product radioactivity, by simple convection. The second test, deliberate shut-off of the secondary coolant loop that supplies the generators, caused the primary circuit to undergo the same safe shutdown. This test simulated the case of a water-cooled reactor losing its steam turbine circuit, perhaps by a leak. This is a list of the major reactor failures in which meltdown played a role: The China syndrome (loss-of-coolant accident) is a hypothetical nuclear reactor operations accident characterized by the severe meltdown of the core components of the reactor, which then burn through the containment vessel and the housing building, then
Nuclear power U.S. Army experimental nuclear power reactor at the National Reactor Testing Station in eastern Idaho, derived from the Borax Boiling water reactor(BWR) design, it first achieving operational criticality/connection to the grid in 1958. In 1961 During a manual removal of a control rod, it underwent a steam explosion and meltdown, which killed its three operators. The event was eventually rated at 4 on the seven-level INES scale. The 's liquid metal cooled reactor accident in 1968 resulted in 9 fatalities and 83 other injuries. The total global installed nuclear capacity initially rose relatively quickly, rising from less than 1 gigawatt