Abstract
A variety of processes, from material sterilization and cancer treatment to used nuclear fuel recycling, benefit from quantifying the sensitivity of the system to radiation. Determining the effects of alpha irradiation on a system may be of complementary interest to the effects of gamma irradiation, as alpha radiation has higher linear energy transfer (LET) and will likely result in different chemical damage effects. This becomes important in advanced nuclear fuel cycle processes where the radioactive materials to be handled in solutions contain significant amounts of alpha emitters. Here we describe a method for studying high LET radiation in a liquid system using a TRIGA® reactor and the 10B(n,α)7Li reaction. By fitting a model based on neutron diffusion and absorption to experimentally obtained Fricke dosimetry data, the high LET dose to a sample was predictable over the full range of reactor power available and varying 10B concentration. This method may be applied to study the effects of high LET radiation on any liquid system as long as a suitable molecule containing boron is used and appropriate neutron diffusion coefficients are known. A wide range of high LET dose rates from <10 Gy/h to >1,000 kGy/h may be obtained with this method.
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This project was funded by U.S. Department of Energy through the Nuclear Energy University Program (NEUP) project no. DE-AC07-05ID14517.
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Pearson, J., Jan, O., Wariner, A. et al. Development of a method for high LET irradiation of liquid systems. J Radioanal Nucl Chem 298, 1401–1409 (2013). https://doi.org/10.1007/s10967-013-2549-0
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DOI: https://doi.org/10.1007/s10967-013-2549-0