New PDF release: A passively-safe fusion reactor blanket with helium coolant

By Crosswait, K.M.; Massachusetts Institute of Technology. Plasma Fusion Center.; United States. Dept. of Energy.; Oak Ridge Institute for Science and Education.; United States. Dept. of Energy. Office of Scientific and Technical Information

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Extra resources for A passively-safe fusion reactor blanket with helium coolant and steel structure

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Tm_ltsintering value). Thus, its temperature window is substantial. hium Zirconate Because zirconium generates a very high level of afierheat, use of lithium zirconate (Li2ZrO3) causes difficult safety problems. 29 However, this is an expensive process, and does not entirely eliminate the problem. The thermal conductivity of lithium zirconate is also low; this adds to the effect of the high aflerheat to make a LOFA or LOCA more severe. 29F. , "TheARIES-ITokamakReactorStudy,FinalReport,"UCLA-PPG-1323,1991.

22. September1992,p, 251. 44 excellent breeding perfbrmance of lithium oxide, the material has been rather extensively studied, and probably more is known about this breeder than is known about the other candidate breeders. The thermal conductivity of lithium oxide is also somewhat higher than that of the other breeders; this can help to mitigate the consequences ofa LOFA or LOCA. The general upper temperature limit for lithium oxide is determined by sintering concerns. The sintering limit is set at 0.

Because of the low amount of reflection, the heating and tritium breeding values were less than 1%larger for the case where both sections were modeled together. Based on recent comparisons between one-dimensional and three-dimensional neutronics calculations, modeling the plasma as isotropic is probably somewhat unconservative for tritium breeding, but yields conservative values for the neutron flux near the first wall. This means that afterheat values near the first wall, which are critical to the thermohydraulics calculations central to the present work, will also be conservative, l_ The lack of conservatism in the tritium breeding ratio can be accounted for by increasing the minimum tritium breeding ratio required for the blanket design.

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A passively-safe fusion reactor blanket with helium coolant and steel structure by Crosswait, K.M.; Massachusetts Institute of Technology. Plasma Fusion Center.; United States. Dept. of Energy.; Oak Ridge Institute for Science and Education.; United States. Dept. of Energy. Office of Scientific and Technical Information


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