Reactor. GE uses a derivative of the 710 reactor originally developed as part of the PLUTO program in the 1960s. The fuel for this reactor is a ceramic-metal (cermet) mixture of UO2 and Mo and sheathed with a MoRe clad. Figure 9 shows the reactor and Fig. 10 provides details of the fuel configuration and clad. The design operating temperature for this reactor is 800 K. Testing of fuel elements for the 710 program produced data on this fuel type at temperatures of up to 2800 K, in pile tests of up to 10000 hours, and hundreds of thermal cycle tests.
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