Not only for the people...
A little local history: In our area, Westinghouse, Duquesne Light, and the federal government built the first commercial nuclear power station, Shippingport. The facility ran well into the 80's when because of small size (only 60 megawatts) and its age, it would be decommissioned in 1987.
Guess what the workers used to decontaminate the building and all the plumbing: Tide! It was used to remove radioactive "crud" from the parts. I believe the wash water was sent to a filter and the filter was now radioactive waste. The fact that tide had phosphates in 1961 and 1987 probably helped; I don't know how modern Tide would do without the phosphates.