I don’t know what the unit you describe is. For nuclear power knowledge, I suggest you read the Nuclear Power Popularization Manual. First of all, nuclear fuel is placed in a pressure vessel for nuclear reactions. The probability of damage to the equipment is very low. Even if there is a leak and no big explosion occurs, it is still sealed in the concrete steel lining of the nuclear island (the concrete steel lining can resist explosions caused by aircraft crashes) , will not spread into the air. Only extreme situations like Fukushima will cause a big explosion. Secondly, workers at the power station only change clothes and do dose measurements when working in the control area. Doses will not be measured if they do not change clothes in other areas (meaning no radiation). Finally, a large number of top students go to work in nuclear power plants and live in the nuclear power living area (the living area is 2 or 3 miles away from Nuclear Island). Why not put the living area and the nuclear power plant together to prevent rodents and pests in the nuclear power plant and to provide water supply for life and industry? Separate pipes, cables, etc. . . .
Why villagers should be avoided living around the nuclear power plant? The main reason is that in the event of an accident, the power station has its own emergency shuttle to organize evacuation in time, but the villagers are scattered, the news is lagging, and there is no shuttle to evacuate in time.