Why is Canada updating its emergency nuclear protocols?

Every so often, federal and provincial governments reexamine plans they have made in the event of a nuclear accident or missile exchange, which have existed in one form or another since the beginning of the cold war. Last week, we learned those plans had been updated very recently, at least in part due to Russian control of Ukraine's Zaporizhzhia nuclear plant.These plans cover everything from trying to protect Canadians overseas who may be impacted by an accident, to more classified documents working out emergency preparations in the event of nuclear missiles being fired. How likely is either the former or latter? What do these plans entail? What would happen should Russia sabotage the plant? And should we really worry about an actual nuclear exchange?GUEST: Ed Waller, Professor in the Faculty of Energy Systems and Nuclear Science at OntarioTechU, NSERC Senior Industrial Research Chair in Health Physics and Environmental Safety