Ten, in fact. Most places have a lot more research and medical reactors than power reactors in nuclear power stations, because you can build one of those for something like 1% of the cost of a nuclear power station. (Remember that the first research reactor, Chicago Pile-1, was built under the stands in a football field, by a team of about 30 people, between November and December of 01942, without any engineering data from existing reactors, on a budget of under 3 million dollars—US$51 million in today's money: https://data.bls.gov/cgi-bin/cpicalc.pl?cost1=2700&year1=194....)

I went to a state university in the US that had its own research reactor, and I thought their university hospital had another one, but it turns out they don't now if they ever did.