BlueTemplar wrote: ↑Sun Sep 01, 2019 1:01 pmI believe that modern reactors have anti-hydrogen-accumulation measures ?
(Of course, very few currently operating reactors are "modern", the overwhelming majority of them having been built in the 70's...)
The modules against accumulating hydrogen, usually catalytic recombinators (wich recombine H back to H2O) can be added quite easily to containment buildings or other relevant areas.
Here‘s some rather old paper giving a brief overview about special types:
https://inis.iaea.org/collection/NCLCol ... 030457.pdf