“Thorium Power, Inc. has told me that they already have the technology to “switch over” from uranium to thorium more than 60% of the reactors in use today in the world.”
“They said that a switched over or built from the ground up thorium powered reactor has for the “blanket” a total of three times the life of a uranium powered reactor. This would mean that the savings during the first fuel cycles will pay for the changeover in the case of a “retrofit.” The core can be used to burn fissionable grade plutonium to non weapons grade material while the blanket will be made from thorium and uranium-233, not 238, so that no weapons grade plutonium-239 can be produced in the reactor.”
U.S. Department of Energy’s Idaho National Laboratory, in partnership with three other science and engineering powerhouses, reached a major domestic milestone relating to nuclear fuel performance on March 8.
The research to improve the performance of coated-particle nuclear fuel met an important milestone by reaching a burnup of 9 percent without any fuel failure. The team has now set its sights on reaching its next major milestone — achievement of a 12-14 percent burnup* expected later this calendar year. 
Burnup rates in most commercial nuclear reactors is 0.7-2% of the fuel that is put into the reactors.
Maximum capsule burn-up > 18 % FIMA (172.8 GWd/t) Fuel Stack
134.5 GWd/t 14%
GWd/t is Gigawatts per day per ton of fuel. 14% burnup is about 134.5 GW days per ton of fuel.
Most current reactors are in the 20-50 GWd/t range.