Charley the intent of my postings was not to argue. My point was that it will not create a nuclear explosion but chemical explosions spreading radioactive poison can be totally disastrous. What I see in your posts seems to say much the same thing. I said that U-238 is not fissile and enriched uranium of about 5% U-235 is required in a light water reactor. I also said that enrichment to about 85% U-235 is needed for an atomic blast. If this is incorrect then I stand corrected. I know that some isotopes of plutonium are fissile and can be created from U-238 under some conditions but they would have to be concentrated
before being atomically explosive. In no way am I saying by intent or ignorance that the situation is not critical!