Simulation of chlorination reaction behavior of hull wastes by using the HSC code
Chlorination reaction behavior of Zircaloy-4 hull waste was investigated by using HSC chemistry code as a function of decladding ratio. The Zircaloy-4 hull waste and residual spent nuclear fuel (SNF) remaining in the hull waste after oxidative decladding process were considered as reactants of the chlorination reaction. It was assumed that the hull waste and residual SNF is fed into the chlorination reaction after oxidative decladding at 700 °C, which might have cause partial/full oxidation of the hull waste and residual SNF components. Reaction temperature for the theoretical calculation was set at 330 °C. The simulation results suggested that solid phase chlorides (BaCl2, SrCl2, NdCl3, LaCl3, and RhCl3) are produced prior to formation of ZrCl4(g) and HfCl4(g). Although ZrCl4(g) is produced later than the solid products, it was expected that ZrCl4(g) can be easily separated from other chlorides as it is a gas phase at 330 °C. Therefore, it was concluded that the decladding ratio might not affect formation of ZrCl4(g) when sufficient chlorine gas was supplied. Equilibrium composition analysis suggested that highly pure ZrCl4(g) with 0.006 mol.% of HfCl4(g) might be recovered from the hull waste via the chlorination reaction method.
KeywordsSpent nuclear fuel Chlorination reaction Hull waste Zircaloy-4 HSC chemistry
- 3.Yasuike Y, Iwasa S, Suzuki K, Kobayashi H, Amano O, Sato N (2003) In: ASME 2003 9th International Conference on radioactive waste management and environmental remediation. ICEM, OxfordGoogle Scholar
- 4.Roine A (2002) Outokumpu HSC chemistry for windows. Pori, FinlandGoogle Scholar
- 7.Lee JW et al (2009) Korea Atomic Energy Research Institute Report-3131Google Scholar
- 8.Kang KH, Heo CM, Jeon MK, Yang JH, Lee CH, Park GI (2011) In: Korea society of thermophysical properties symposium 11. Daejeon, Republic of Korea Google Scholar