I believe the Russians are or have already turned Novaya Zemlya into a national park, so with Bikini Atoll, there are at least three nuclear nature preserves in the world.
But that misses the point, which is Mr. Bethell's asinine assertion that Chernobyl wasn't a disaster simply because few died as a direct result.
I depends on what is meant by "disaster". Ask any good union man what loosing his union wages would be. "It would be a Disaster, OMG!"
As far as radiologically active materials escaping confinement is concerned there will come the time when Chernobyl is considered trivial.