Abstract
The nuclear fission process is not only a fascinating topic for modern science, it also plays a crucial role in a host of important technologies and applications. The safe, reliable and low-carbon production of electricity by nuclear reactors is an important component in a modern energy portfolio. Section 4.1 briefly reviews how a nuclear reactor operates and discusses the nuclear fission processes at play across the entire nuclear fuel cycle. The development of nuclear reactors preceded by a few years only the first atomic explosion in the desert of New Mexico, USA. Safeguarding existing stockpile of nuclear weapons and monitoring nuclear activities across the globe is the topic of Sect. 4.2. Scientific activities enabled by the development of underground nuclear testing, including the discovery of several elements, are also described. Nuclear fission may play a crucial role in the formation of the heaviest elements in the cosmos. In the environments of cataclysmic astrophysical events of supernovae or compact object mergers, continual rapid neutron capture and beta decays may synthesize the actinides. Section 4.3 provides a brief overview of the importance of fission in the r process and highlights the potential insights that can be gained from future observations.
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Notes
- 1.
Named after the famous fictional submarine appearing in Jules Verne’s 1870 science fiction novel Twenty Thousand Leagues Under the Sea.
- 2.
There exists a long list of codes used by the nuclear industry, national laboratories, universities, for a broad range of specialized reactor neutronics calculations, e.g., SERPENT, SCALE, MCNP, TRIPOLI, APPOLO.
- 3.
This is achieved either by directly boiling the coolant inside the reactor (BWR) or indirectly through the heat exchanger (PWR).
- 4.
Assuming an infinite sized reactor, with no leakage.
- 5.
- 6.
Some of the fission products accumulating in the reactor have very large neutron capture cross sections, and are therefore considered strong neutron absorbers or “poisons,” e.g., 135Xe and 149Sm. Note that 135Xe has the highest of the known capture cross sections, at 2.7 million barns at thermal energy!
- 7.
Cross sections of other isotopes, e.g., hydrogen, oxygen, structural materials, are also relevant, but we limit ourselves to actinides for the purpose of this discussion.
- 8.
MOX fuel stands for mixed oxide fuel that contains recycled plutonium and depleted uranium.
- 9.
This is only true to some extent. See Chap. 3 for more details.
- 10.
Recent efforts in this direction are being explored thanks to the development of fission event generators, as described in Chap. 3, which keep track of all correlations and distributions of the emitted prompt neutrons on an event-by-event basis.
- 11.
The role of isomers in fission fragments on the time dependence of prompt γ rays was studied in Talou et al. [97].
- 12.
Notations are the ones used by Selby et al. [124].
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Mumpower, M.R., Talou, P., Vogt, R. (2023). Impact on Science and Technology. In: Talou, P., Vogt, R. (eds) Nuclear Fission. Springer, Cham. https://doi.org/10.1007/978-3-031-14545-2_4
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