Steam explosion major cause of human fatalities in volcanic eruptions. The 1986 Chernobyl nuclear disaster in Soviet Union was feared to cause major steam explosion (and resulting Europe-wide fallout) upon melting the lava-like nuclear fuel through the reactor's basement towards contact with residue fire-fighting water and groundwater. The threat was averted by frantic tunneling underneath the reactor in order to pump out water and reinforce underlying soil with concrete. When a pressurized container such as the waterside of a steam boiler ruptures, it is always followed by some degree of steam explosion. A common operating temperature and pressure for a marine boiler
Education in Ukraine 2017 law "On Education" the language of instruction in Ukrainian schools is the state language, which is Ukrainian (national minorities are guaranteed the right to study in public educational facilities including their language alongside Ukrainian). In 2000/2001 academic year, 70% of students attended Ukrainian-language schools (that is where Ukrainian is the primary language of instruction), while 29% were studying in Russian-language schools. There are schools with instruction in Romanian, Crimean Tatar, Hungarian, and Polish in regions populated by those groups. Historically, the language of instruction has often changed in Ukraine. When Ukraine was part of the Russian Empire, the Ukrainian