JFZ90: You must of gone to the same spin school as Des Browne and CAS. What part of Def Stan 00-56 (issue 4) do you not understand.
If it is not ALARP it is NOT SAFE.
QinetiQ say the system in not ALARP.
Now, come on JFZ, this is not rocket science.
The levels of risk are; Broadly Acceptable, Tolerable and Unacceptable.
"Tolerably Safe" is a term which does exist.
DV