For the benifit of others who may search for this in the future. The test was a fairly basic logic / math test with some instrumentation questions. I passed the test and had an interview the same day.
The interview focused on safety, your knowledge of the nuclear program in Canada, AECLs function and role. Overall I felt that the interview went well but in retrospect I think I could have provided a few better answers. I did not the job ;(
I have also applies to OPG's operator program so I will hopefully be writing that test as well.