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Conceptual study of axial offset fluctuations upon stepwise power changes in a thorium-plutonium core to improve load-following conditions

Cheuk Wah Lau (Institutionen för teknisk fysik, Nukleär teknik) ; Victor Dykin (Institutionen för teknisk fysik, Nukleär teknik) ; Henrik Nylén (Institutionen för teknisk fysik, Nukleär teknik) ; Klara Insulander Björk (Institutionen för teknisk fysik, Nukleär teknik) ; U. Sandberg
Annals of Nuclear Energy (0306-4549). Vol. 72 (2014), p. 84-89.
[Artikel, refereegranskad vetenskaplig]

The increased share of renewable energy, such as wind and solar power, will increase the demand for load-following power sources, and nuclear reactors could be one option. However, during rapid load-following events, traditional UOX cores could be restricted by the volatile oscillation of the power distribution. Therefore, a conceptual study on stability properties of Th-MOX PWR concerning axial offset power excursion during load-following events are investigated and discussed. The study is performed in SIMULATE-3 for a realistic PWR core (Ringhals-3) at the end of cycle, where the largest amplitude of the axial offset oscillations is expected. It is shown that the Th-MOX core possesses much better stability characteristics and shorter reactor dead time compared with a traditional UOX core, and the main reasons are the lower sensitivity to perturbations in the neutron spectrum, lower xenon poisoning and lower thermal neutron flux.

Nyckelord: Thorium, PWR, Axial offset, Xenon oscillations, Stability, Load following

Denna post skapades 2014-09-15. Senast ändrad 2014-12-09.
CPL Pubid: 202734


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Institutioner (Chalmers)

Institutionen för teknisk fysik, Nukleär teknik (2006-2015)


Teknisk fysik

Chalmers infrastruktur