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NuScale Energy Exploration Center opens at George Mason University
NuScale Power Corporation has opened another Energy Exploration (E2) Center—this one at George Mason University in Arlington, Va. Just last month, a NuScale E2 Center opened at South Carolina State University in Orangeburg, S.C. The newest E2 at George Mason is the company’s 11th center.
Jeffrey Rest
Nuclear Technology | Volume 61 | Number 1 | April 1983 | Pages 33-48
Technical Paper | Nuclear Safety | doi.org/10.13182/NT83-A33141
Articles are hosted by Taylor and Francis Online.
As the noble gases play a major role in establishing the interconnection of escape routes from the interior to the exterior of nuclear reactor fuel, a realistic description of the release of volatile fission products (VFPs) must a priori include a realistic description of fission gas release and swelling. In addition, as the VFPs are, in general, quite soluble in the fuel matrix and are known to react with other elements to form compounds, a realistic description of VFP release must include the effects of VFP chemistry on VFP behavior. The steady-state and transient gas release and swelling subroutine, FASTGRASS, has been modified to include a mechanistic description of the behavior of VFPs (iodine, cesium, CsI, CS2M0O4, and CS2UO4). Phenomena modeled are the chemical reactions between the VFPs, VFP migration through the fuel, and VFP interaction with the noble gases. Calculations were performed with FASTGRASS to describe the release of noble gases, iodine, cesium, and CsI from light water reactor fuel during steady-state and power-ramping conditions. Key issues that are addressed in the analysis are the effects of (a) VFP chemistry, (b) various assumptions concerning mechanisms of VFP migration through solid UO2, (c) fission gas behavior, and (d) an accident scenario on the chemical form of the released iodine and the rate of iodine release from water reactor fuel.