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Technical note Variable moderation high performance light water reactor (VMHWR)
Jahanfarnia, G ; Sharif University of Technology | 2013
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- Type of Document: Article
- DOI: 10.1016/j.anucene.2013.02.025
- Publisher: 2013
- Abstract:
- A new flow model of high performance light water reactor (HPLWR) is discussed in the present study. HPLWR involves a negative density reactivity coefficient with high time delay. This factor decreases the stability of such reactors when transient and abnormal accidents happen. A new design for enhancing safety and efficiency in such reactors is presented. In the new design, the fluid passing through the moderator channels and the assembly gaps (known as a moderator) flows in channels detached from coolants. It is possible to control the moderator mass flux. Increasing or decreasing the moderator mass flux will modify the moderation capacity, which results in a change in the reactor power. The new model is known as variable moderation high performance light water reactor (VMHWR). In order to analyze the new model, neutronic/thermal-hydraulic coupling is used. The changes happening to the VMHWR parameters in response to the changes in the moderator mass flow rate are reported
- Keywords:
- Neutronic/thermal-hydraulic ; Supercritical-pressure ; Time delay ; VMHWR ; High-performance light water reactors ; Mass flow rate ; Neutronics ; Reactivity coefficients ; Safety and efficiencies ; Supercritical pressures ; Technical notes ; Couplings ; Moderators
- Source: Annals of Nuclear Energy ; Volume 58 , 2013 , Pages 1-5 ; 03064549 (ISSN)
- URL: http://www.sciencedirect.com/science/article/pii/S0306454913001175