Which outcome will soon limit sustained Deuterium-Tritium (D-T) fusion within present-generation Tokamak reactors?

💡 Explanation

Neutron activation limits Tokamak duration because the D-T fusion produces high-energy neutrons. Neutron bombardment transmutes and weakens structural material via neutron activation, therefore causing embrittlement, radioactivity in containment, rather than pressure or heating limitations, because those can be improved.

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