There are actually several nuclear power plants in MA. But they don’t have coal or refineries, and federal regulations essentially make it impossible for the NE to get gas from Texas. They only way they can get fuel is to have shipped from Europe.
There may be state fule/air regs as well. Here on the AZ/CA border, fuel is over a buck a gallon higher in Cali than AZ. Part of the reason is CARB laws that force places like needles to have ‘California blend’ fuel shipped in instead of the trucks supplying AZ border towns to frive over the bridge since they are there already.
I remember the City Fathers of Needles were once pondering setting an ‘observer’ on the road to record Needles residents who would cross over to gas their cars up in Mohave Valley in sight of the border. They wanted to mail them a ticket/fine in order to force people to buy Cali priced gas from Cali fuel stations.
That didn’t go over well. But it all boiled down to state laws causing the headache.