EXPRESS METHOD OF PROGNOSING OF LETHAL ZONEZ OF DANGEROUS FACTORS OF FIRES AND EXPLOSIONS DURING TOXIC SUBSTANCE OUTBURSTS

According to technical regulations of Republic of Belarus for a set of highly toxic substances calculations of lethal zones of dangerous factors of fires and explosions should be performed together with calculations of lethal zones of inhalation impact on a human organism. Following the technical regulations of Republic of Belarus theoretical basis was developed for the method of express prognostication of blast waves and thermal emission lethal zones for highly toxic substances that are liquids with boiling point higher than temperature of surrounding media, pressured and liquefied gases. It was shown that retrieval of analytic dependencies of a distance at which human can be damaged with defined probability on a volume of the spilled toxic substance is practically very challenging. That's why electronic computer was used to retrieve the arrays of lethal zone dimensions during fires and explosions with bursts of highly toxic substances that are inflammable and explosive pressured and liquefied gases and liquids with boiling point higher that temperature of the surrounding media with probabilities of human death of 1, 50 and 99,9 %. Amounts of highly toxic substances when most probable damages are blast wave, thermal emission of a spilled fire and “fireball” fire were defined. The polynomials were retrieved for calculations of lethal zones of blast wave, thermal emission of a spilled fire and “fireball” fire for highly toxic substances that are liquids with boiling points higher than temperature of surrounding media, pressured and liquefied gases. Retrieved polynomials are the basis of the express method of prognostication of lethal zones for highly toxic substances.