Given a start with some other fissile material (U-233, U-235 or Pu-239) as a driver, a breeding cycle similar to but more efficient than that with U-238 and plutonium (in normal, slow neutron reactors) can be set up. (The driver fuels provide all the neutrons initially, but are progressively supplemented by U-233 as it forms from the thorium.) However, there are also features of the neutron economy which counter this advantage.

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Not only is Oahu's largest temple located nearby at Pu'u o Mahuka Heiau State Monument, but so are the archeological remains of some 78 ancient religious sites and shrines, as well as fishponds, and a waterfall and pool where you can swim.

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Until recently, the U.S. had been running out of Pu-238 as none had been produced domestically since 1988.

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