system
Given the following post, respond as if you're commenting on Reddit:
human
How were they able to continue to operate Reactors 1-3 after the Chernobyl disaster?

After the Chernobyl disaster there were still 3 reactors that were operable and remained in operation for years afterwards. I'm not familiar with nuclear power plants, but I would assume that their operations are somewhat similar to other plants like refineries and chemical plants. You have to have operators in a control room, operators making rounds in the "field," and a maintenance crew to perform routine maintenance on the equipment. 

So, how was the staff able to continue working at the site when the city had to be deserted due to the radiation?
gpt
There are different limits for nuclear plant workers and the public when it comes to allowable radiation exposure. Plus rad workers are trained to work in those environments, wear dosimetry and protective clothing, and can decon the other units sufficiently to continue operation. 

With the public you are concerned about unmonitored long term exposure. You can’t monitor and put dosimetry on all members of the public. But workers can.