> With AECL's continued failure to explain how to test their device
They can't. There was a single developer, he left, no tests existed, no one understood the mess to confidently make changes. At this point you can either lie your way through the regulators or scrap the product altogether.
I've seen this kind of devs and companies running their software in regulated industries like in the therac incident, just now we are in the year 2025. I left because i understood that it's a criminal charge waiting to happen.