Neutronics in Fusion: Difference between revisions

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Neutronics in fusion deals with the behavior and effects of neutrons produced during fusion reactions. In fusion systems, especially in deuterium–tritium reactions, high-energy neutrons (about 14.1 MeV) are generated in large numbers. These neutrons carry most of the fusion energy and interact with the surrounding materials, where their energy is deposited through scattering and nuclear reactions. Neutronics analysis is therefore essential for predicting energy deposition, material damage, radiation shielding requirements, and tritium breeding performance. Understanding neutronics is a key aspect of designing safe, efficient, and sustainable fusion reactors.
== Fusion Reactions ==
== Fusion Reactions ==


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== Neutron Interactions in Fusion Devices ==
== Neutron Interactions in Fusion Devices ==


Fusion neutrons escape the plasma and interact with reactor materials, producing heat and influencing material behavior. The principal neutron interactions in fusion reactors are summarized below:
Neutrons are electrically neutral and are not influenced by magnetic fields. As a result, fusion neutrons escape the plasma and interact with reactor materials, producing heat and affecting material behavior. The principal neutron interactions in fusion reactors are summarized below:


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== Neutron Modeling in Plasma Codes ==
== Neutron Modeling in Plasma Codes ==


The following plasma modeling codes are used to predict fast-ion behavior and fusion-born neutron emission in tokamak and stellarator plasmas, providing neutron source distributions for transport simulations and diagnostic design.
Neutronics simulation plays a fundamental role in the advancement of nuclear fusion by supporting reactor design, safety assessment, and material optimization. The following plasma modeling codes are used to predict fast-ion behavior and fusion-born neutron emission in tokamak and stellarator plasmas, providing neutron source distributions for transport simulations and diagnostic design.


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== Neutron Modeling Using Monte Carlo Simulations ==
== Neutron Modeling Using Monte Carlo Neutronics Codes ==


Monte Carlo neutron transport codes are widely used in fusion research to model neutron behavior, material interactions, and diagnostic responses. The table below summarizes the principal neutron-related work performed by each code, together with representative references.
Monte Carlo neutron transport codes are widely used in fusion research to model neutron behavior, material interactions, and diagnostic responses. The table below summarizes the principal neutron-related work performed by each code, together with representative references.