No matter what environment you choose to endeavor in, your looking at many hazards. The best advice, is to work for a company that educates and advocates safety in it's industry. Straight out of the blocks, the posting explained the potential of being exposed to low level radiation!
That's a Very Good Start!
The website you referenced, is an " ANTI " opinion, based on the long shots! Which, in fact, is the bases of design for most Nuclear Power Stations. I haven't had my ear to the news lately, but I can't recall hearing about a lot of seismic activity in Canada, in past years! Possible, YES! Probable, NO! If a seismic event did take place, which could cause damage to the facility, would the plant be your biggest worry? These Anti-Nuke groups are simply looking for their 15 minutes of importance and usually pushing their venue for a buck! Either a Book, or a T-Shirt, it's usually all about the bucks!
Age of the plants, is another concern. Todays utilities run them longer and harder, which does influence component malfunctions, but you have to view the overall big picture! These plants were not assembled with parts from the local hardware store! They were assembled with reliable components from a variety of industries, all with proven track records. Many of the safety systems are redundent, two or three fold! That's like having a spare engines, or two, in your car, ready to run at the flip of a switch!
Radiation Exposure: In the past decades it was simply part of the job. Today it is one of the prime indicators of a plants performance, World Wide! Unlike a lot of industries, the hazards associated with low level exposure have yet to be determined. The world wide population, of low level exposed individuals, hasn't established any specific statistical pattern, as of yet! Other Industries don't have it so lucky! The products of some of their processes, doesn't allow a lot of room for error, some ZERO!
One final note, you have to appreciate the website name, " Blackhole "! Seems like an Appropriate Name!
RG