Trubru,
Is far as I know unless you're flying at higher than FL490 then there's no requirement for cosmic (aka ionising) radiation monitors.
However, there is a requirement for aircrew to be advised of CR if there is a risk of greater than 1mSv a year exposure. ie pretty much any one flying a jet above FL300. 6mSv a year means individual monitoring and roster changes etc.
We use "
EPCARD" and there's also "CARI"