Coupled Neutronic and Thermal-Hydraulic Out-of-Phase Stability of Supercritical Water Cooled Reactors

Research output: Chapters, Conference Papers, Creative and Literary WorksRGC 32 - Refereed conference paper (with host publication)peer-review

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Author(s)

Detail(s)

Original languageEnglish
Title of host publicationProceedings of the 2006 International Congress on Advances in Nuclear Power Plants - ICAPP'06
Pages361-371
Publication statusPublished - Jun 2006
Externally publishedYes

Conference

Title2006 International Congress on Advances in Nuclear Power Plants (ICAPP'06)
PlaceUnited States
CityReno
Period4 - 8 June 2006

Abstract

The coupled neutronic-thermalhydraulic out-of-phase stability of the U.S. reference SCWR design is analyzed and compared with a typical BWR. A modal expansion method based on A modes (Reactivity modes) of the neutron kinetic equation is applied and the first subcritical mode of the neutron dynamics model is coupled with a coolant thermal hydraulic model. The out-of-phase oscillation of the SCWR is found to be dominated by the reactor thermal-hydraulics, whereas the BWR is more sensitive to the coolant density reactivity coefficient due to much stronger neutronic coupling. It is also found that the SCWR stability is sensitive to the details of the core simulation model and the hottest channel dominates the stability. The BWR is less sensitive to the core simulation model since it has much stronger neutronic coupling that is controlled by the whole core average properties. Power and flow rate sensitivity analysis of the out-of-phase stability was also conducted for both the SCWR and the BWR. The SCWR stability is found to be more sensitive to the operating parameters than the typical BWR. Although the water rods heating can improve the SCWR out-of-phase stability, it cannot significantly improve the sensitivity feature.

Citation Format(s)

Coupled Neutronic and Thermal-Hydraulic Out-of-Phase Stability of Supercritical Water Cooled Reactors. / Zhao, Jiyun; Saha, Pradip; Kazimi, Mujid S.
Proceedings of the 2006 International Congress on Advances in Nuclear Power Plants - ICAPP'06. 2006. p. 361-371.

Research output: Chapters, Conference Papers, Creative and Literary WorksRGC 32 - Refereed conference paper (with host publication)peer-review