wdolson
Posts: 10398
Joined: 6/28/2006 From: Near Portland, OR Status: offline
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Diving is a big tourist attraction in the Bikini Atoll today: https://www.scubadoctor.com.au/article-uss-saratoga.htm A B-17 used in a bomb test in Nevada now flies around the country every year with the Collins Foundation. Nagasaki and Hiroshima are occupied cities today. The radiation from a nuke drops off pretty sharply in a few months. There is some unused plutonium and uranium, but most of it gets sprayed well away from ground zero and since both are very dense, they will tend to sink in the water column. I think above ground nuclear tests were a very bad idea, a lot of people got radiated from fallout and it has put byproducts of those tests in the environment. I forget what it is, but there is a particular isotope of something that is found in all plants grown after 1945 and it essentially didn't exist before then. It isn't radioactive, but it isn't good for you chemically either. All radioactivity is not the same either. There are alpha particles, beta particles, free neutrons, and gamma rays. Alpha particles are probably the most common radioactive particles (in most cases), but they are very large compared to the others. They will cause cancer if they get in you, but you have to ingest them. They bounce off your skin. Beta particles are worse, but neutrons and gamma rays are the worse. Lead is used to stop beta and neutron particles, very little will stop gamma rays. All you can hope is the gamma ray gets absorbed by something before it get to you, which is what our atmosphere does. How nuclear radioactivity works is a very complex subject. I've studied it some, but I probably got some details wrong in my off the cuff description. After being in the water for 60 years with all the storms that have blown through, etc. the wrecks from the tests aren't very radioactive today. You probably wouldn't want to raise one and live on it, but a short exposure on a dive probably isn't going to significantly raise your cancer risk any more than some of the things you ate in the last week. Bill
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WitP AE - Test team lead, programmer 
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