Neutron Radiation Damage Estimation in the Core Structure Base Metal of RSG GAS

Santa, S A; Suwoto, Suwoto

doi:10.1088/1742-6596/962/1/012050

Cited by 2 publications

(1 citation statement)

References 17 publications

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“…As an accepted standard indicator for radiation damage in materials, displacement per atom (dpa) represents a physical unitless quantity that states how often an atom was displaced [32,33]:…”

Section: Methodology Of the Dpa Conceptmentioning

confidence: 99%

Monte Carlo simulation of proton- and neutron-induced radiation damage in a tantalum target irradiated by 70 MeV protons

Ophoven

Mauerhofer

et al. 2021

Appl. Phys. A

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Beams of free neutrons are an important probe to analyze the structure and dynamics of condensed matter and are produced at neutron research reactors, neutron spallation sources or compact accelerator-based neutron sources (CANS). An efficient construction of CANS with a maximized neutron yield and brilliance requires reliable knowledge of the consequences of radiation-induced material damage, the predominating bottleneck of a target’s lifetime. In the framework of the Jülich High-Brilliance neutron Source project, the impact of proton- and neutron-induced material damage of a tantalum target was investigated. The Monte Carlo codes FLUKA and SRIM were utilized to extract the number of displacements per atom resulting from atomic rearrangements. The simulations performed distinctly identify the rear of the neutron target as the most vulnerable area, with the protons as main damage contributors. The minor contribution of neutrons is a material-specific phenomenon due to their high mean free path length in tantalum. Numerical results of the simulations served to calculate average and peak damage rates $${R}_{\mathrm{d}}$$ R d (dpa/s), both in turn scaled to annual displacement doses for continuous operation in a full power year (dpa/fpy). Supplemented by the literature, a minimum target lifetime $$\tau _{\min }$$ τ min of 2.6 years (33 Ah) is concluded.

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Section: Methodology Of the Dpa Conceptmentioning

confidence: 99%