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The safety of modular high-temperature gas-cooled reactors

Paul R. Kasten

Energy, 1991, vol. 16, issue 1, 359-369

Abstract: Modular High-Temperature Gas-Cooled Reactors (MHTGRs) have an unprecedented degree of safety due primarily to coatedparticle fuel retaining radiologically-significant nuclides within the fuel coatings. The practical ability of coated fuel particles to quantitatively retain important fission products up to 1600 ° to 1700 °C has been demonstrated in the Federal Republic of Germany (FRG), and the United States (USA) is proceeding with similar demonstrations. The USA program has placed emphasis on development of fuel performance models, using experimental data for that development. The mathematical models predict high retention of fission products for reference-quality MHTGR fuel, and the predictions are supported by the FRG experimental data. Specific safety analyses and results obtained from various “bounding” type accidents support the claimed high degree of inherent safety of MHTGRs.

Date: 1991
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