However, on the morning of 16 March, the remaining workers had to be evacuated for a brief period of time due to a radiation spike which was detected which could be harmful to the workers' health. It was reported that when they returned to the plant, a further 130 or so workers joined their colleagues to total of around 180 to stabilize the reactors. The number of workers rose to 580 on the morning of 18 March. By 12 April, approximately 700 workers were working on-site.http://www.asahi.com/english/TKY201104110137.html Heroes and realists found among the brave "Fukushima 700"
