1986 20thcentury 330 accidentprevention accidents air atomicbomb chernobylnuclearaccident chornobylʹ computersimulation congresses cumbria descriptionandtravel economicaspects england environmentalconditions fissionproducts heat history idaho idahofalls japan masstransfer militaryaspects nuclearenergy nuclearindustry nuclearpowerplants nuclearreactors pollution radioactivesourcestrength safety securitymeasures simulationmethods socialconditions transmission ukraine unitedstates wn650p857s1986