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Thorium Reactor Safety Features
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=== 6. Online Fission Product Removal === Xenon-135 is a fission product with a large neutron cross-section β it absorbs neutrons very efficiently and can suppress a chain reaction. In the Chernobyl accident, a xenon transient (xenon poisoning followed by sudden xenon burn-off) contributed to the uncontrolled power surge. In solid-fuel reactors, xenon and other gaseous fission products are trapped within the fuel rods and cannot be removed during operation. In an MSR/LFTR, gaseous fission products β including xenon and krypton β continuously bubble out of the liquid fuel salt as gas and are captured in a separate processing loop in real time. Xenon poisoning cannot accumulate to dangerous levels because it is being continuously removed.
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