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Checking some other sources like this one, I see that the zirconium reaction is indeed considered the primary source of hydrogen gas during meltdowns, and radiolysis as source of hydrogen gas poses more a problem of accumulation.

I also read that after Chernobyl, to prevent hydrogen gas explosions, plant safety plans foresee the flooding of the vessel with nitrogen so that there is no oxygen to react with. Hence the explosion only outside after venting.

*Lunatic*, n.
One whose delusions are out of fashion.

by DoDo on Tue Mar 15th, 2011 at 07:09:09 AM EST
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