Studies on the equation of state of mixed carbide fuel

Joseph, M. ; Mathews, C. K. ; Bhaskar Rao, P. (1989) Studies on the equation of state of mixed carbide fuel Journal of Nuclear Materials, 168 (3). pp. 220-227. ISSN 0022-3115

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Official URL: http://linkinghub.elsevier.com/retrieve/pii/002231...

Related URL: http://dx.doi.org/10.1016/0022-3115(89)90588-6

Abstract

The equation of state of reactor fuels is required up to very high temperatures in order to assess the energy release in hypothetical core disruptive accidents (HCM). Though the mixed carbide of uranium and plutonium is a candidate fuel material for fast breeder reactors, much information is not available on its equation of state. This paper reports the results of our studies to obtain the equilibrium vapour pressures of uranium carbide and uranium-plutonium mixed carbide of varying compositions in the temperature range of 1300-9000 K. An extrapolation method based on the principles of equilibrium thermodynamics has been used as also the principle of corresponding states. The agreement between the different results are discussed and their implications in HCDA calculations brought out.

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