'The Chain Reaction' was made by many of the same actors and crew who made the first - and best - 'Mad Max' movie. Although the IMDb credits don't share too many names, the style, photography and direction are so uncannily similar, that George Miller must've been more involved with 'The Chain Reaction' than just as co-producer. The two films are practically twins. Even the car-chase scenes are alike, which is good.
The plot could easily serve as a prequel to Mad Max; an accident at an Austrailian nuke disposal site out in the boonies results in catastrophic radiation leakage which will poison the area's water table. The evil corporation that owns the disposal site is trying to hush up the accident by sealing off the area, but some eco-activists have been in contact with one of the scientists at the site, and they find out about it. The scientist took a huge dose of plutonium during the accident and only has 3 days to live, but hotheaded motorhead dude Larry (played by Steve Bisley - 'The Goose' in 'Mad Max') and his wife get tangled up in the unfolding crisis...
Many of the local inhabitants appearing in 'The Chain Reaction' also played similar characters in 'Mad Max'. They don't necessarily play the exact same parts, but it is not a stretch to imagine that after the nuclear catastrophe has devastated their environment, they all evolved into the desperate characters of 'Mad Max'.
It appears (to me anyway) that 'The Chain Reaction' was filmed first, since one of the characters seems to say "It's 1977, mate...", but I'm not quite sure about this. The haircuts and clothes are definitely mid-70's, (flared jeans etc) while Mad Max has a later, more punkish late-70's look.
