Cleaning up the Fukushima nuclear plant — a task predicted to cost 86 times the amount earmarked for decommissioning Japan's first commercial reactor — is the mother of all salvage jobs. Still, foreign firms with decades of experience are seeing little of the spoils.

Safely dismantling the Japanese power plant, wrecked by the 2011 earthquake and tsunami, will cost about ¥8 trillion ($70 billion), the Ministry of Economy, Trade and Industry said on Dec. 9, quadrupling the previous estimate. While a contract to help clean up the facility would be a windfall for any firm with specialized technology, the lion's share of the work has gone to local companies that designed and built most of Japan's atomic infrastructure.

The bidding process for Fukushima contracts should be more open to foreigners, as Japan has never finished decommissioning a commercial nuclear plant, let alone one that experienced a triple meltdown, according to Lake Barrett, an independent adviser at Japan's International Research Institute for Nuclear Decommissioning. While the Fukushima cleanup is unlike any nuclear disaster in history, foreign firms that have experience decommissioning regular facilities could provide much-needed support, according to Barrett, and even the plant's operator, Tokyo Electric Power Co. Holdings Inc.