From: marsh@panix.com   
      
   On Wed, 3 Feb 2021, Alain Fournier wrote:   
      
   > My understanding is that the exhaust is not radioactive at all. I   
   > don't think it is a nuclear propulsion system. They just accelerate a   
   > plasma the way they do it when they start up a Tokamak. In the   
   > Tokamak, the plasma moves at very high speeds before initiating   
   > nuclear reactions.   
   >   
   > Think of it as a novel way to make an ion drive.   
      
   As Tokamaks do get radioative upon ussage, I doubt that exhaust isn't   
   radioactive.   
      
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