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- W2071412599 abstract "Abstract The fuel-pin modeling code, LIFE-GCFR, has been developed to predict the thermal, mechanical, and fission-gas behavior of Gas-Cooled Fast-Reactor (GCFR) fuel rods under normal operating conditions. Starting with the Liquid-Metal Fast-Breeder-Reactor (LMFBR) code, LIFE-3, a number of modifications and additions were made to the mixed-oxide fuel models in the code to make the description of fuel behavior more physically realistic for both LMFBR and GCFR applications. These include: a more predictive grain growth model, a creep model which is valid for both primary and secondary creep, a stress-dependent crack-healing model, a more realistic solid-fission-product swelling rate, and the addition of the GRASS-SST fission-gas model (modified for fast reactor application). Then the following options were added to incorporate specific design features of the GCFR: helium coolant properties, heat transfer coefficients for smooth and ribbed cladding sections, and a model for the axial diffusion of fission gases from the fuel to the pressure-equalization system (PES). LIFE-GCFR predictions were checked against experimental observations for a wide range of irradiation conditions. The overall good agreement between predictions and experimental results indicates that LIFE-GCFR is capable of realistically predicting the thermal, mechanical, and fission-gas behavior of mixed-oxide fuel under GCFR and LMFBR operating conditions. The reference GCFR fuel-element design was analyzed with the verified LIFE-GCFR code for steady-state histories, power-cycling histories, and the off-normal event of blockage of the PES system. The results of the calculations indicate that the GCFR fuel has adequate design margins under anticipated operating conditions." @default.
- W2071412599 created "2016-06-24" @default.
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- W2071412599 date "1982-03-01" @default.
- W2071412599 modified "2023-09-27" @default.
- W2071412599 title "LIFE-GCFR: A computer code for predicting Gas-Cooled Fast-Reactor fuel performance" @default.
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- W2071412599 doi "https://doi.org/10.1016/0029-5493(82)90038-3" @default.
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