Fission by-products include irradiated water, radiactive xenon (a problem as that turns out to be a neutron-absorbant and resulted in unexplained power-loss on early nuclear reactors), and other gasses.<p>There&#x27;s a lot of crud they&#x27;re producing.<p><a href="http:&#x2F;&#x2F;hyperphysics.phy-astr.gsu.edu&#x2F;hbase&#x2F;NucEne&#x2F;xenon.html" rel="nofollow">http:&#x2F;&#x2F;hyperphysics.phy-astr.gsu.edu&#x2F;hbase&#x2F;NucEne&#x2F;xenon.html</a>