Abstract
A self-developed program was used to study the thermal-hydraulic behavior of an integral type reactor under heaving condition. Comparison of calculated results with the data of experiments performed on a natural circulation loop designed with reference to an integral type reactor of Tsinghua University in inclination, heaving, and rolling motions was carried out. Characteristics of natural circulation in heaving motion and effect of motion parameters on natural circulation were investigated. Results indicated that: (1) long-period heaving motion would lead to more significant influence than inclination and rolling motion; (2) it was an alternating force field which consisted of gravity and an additional force that decided the flow temperature and density difference of natural circulation; (3) effect of strengthkand cycleTof heaving motion on flow fluctuation of natural circulation and condensate depression of heating section outlet was performed.
Highlights
Integral type reactor with its coolant system components in reactor vessel has wide applications due to its passive safety property. 5 MW experimental low temperature nuclear heating reactor (NHR) of Tsinghua University is a low-power integral type reactor with modular and self-stabilization which has been applied to the engineering fields of heat supply and seawater desalination [1, 2]
As part of the studies responding to the application of NHR as ship power, Institute of Nuclear and New Energy Technology (INET) of Tsinghua University built an experimental loop with reference to NHR to investigate the effect of rolling motion and inclination motion on natural circulation [3,4,5]
The comparison of calculated results with experimental data on a natural circulation loop designed with reference to 5 MW experimental low temperature nuclear heating reactor of Tsinghua University in inclination, heaving, and rolling motions was carried out
Summary
Integral type reactor with its coolant system components in reactor vessel has wide applications due to its passive safety property. 5 MW experimental low temperature nuclear heating reactor (NHR) of Tsinghua University is a low-power integral type reactor with modular and self-stabilization which has been applied to the engineering fields of heat supply and seawater desalination [1, 2]. As part of the studies responding to the application of NHR as ship power, Institute of Nuclear and New Energy Technology (INET) of Tsinghua University built an experimental loop with reference to NHR to investigate the effect of rolling motion and inclination motion (two typical oceanic movements) on natural circulation [3,4,5]. A program was developed to provide a tool for investigating the effect of heaving motion (the third typical oceanic movement) on natural circulation which could not realized through the experimental loop. Successful operation of NHR has proved the feasibility of its technical solutions Under oceanic conditions, it needs revalidation through experiments resulting from the effect of oceanic environment on thermal-hydraulic behavior of natural circulation due to the additional movements caused by oceanic motions, such as rolling, heaving, and inclination.
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