The Chernobyl disaster ultimately involved more than 500,000 workers.
The struggle to safeguard against scenarios which were , at many times falsely , perceived as having the potential for greater catastrophe and the later decontamination efforts of the surroundings , ultimately involved over 500,000 workers and cost an estimated 18 billion rubles .	decontamination	decontamination	over 500,000 workers	Liquidator (Chernobyl)
