Conceptual design and analysis of a passive residual heat removal system for a 10 MW molten salt reactor experiment

Sun, Lu; Sun, Licheng; Yan, Changqi; Fa, Dan; Naxiu, Wang

doi:10.1016/j.pnucene.2013.09.013

Cited by 22 publications

(6 citation statements)

References 15 publications

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“…Based on the residual heat removal system for the MSRE developed by Oak Ridge National Laboratory, a conceptual design with passive characteristics was completed using natural air cooling rather than the forced water circulation to cool (Figure 11). 48 A more detailed design was put forward with the L-type fin tube chosen as the heat exchanger tube of the air cooler. 48 A more detailed design was put forward with the L-type fin tube chosen as the heat exchanger tube of the air cooler.…”

Section: Passive Residual Heat Removal Systemsmentioning

confidence: 99%

“…Based on the residual heat removal system for the MSRE developed by Oak Ridge National Laboratory, a conceptual design with passive characteristics was completed using natural air cooling rather than the forced water circulation to cool the condenser (Figure 11). 48 The passive heat removal system is composed of 3 natural circulation loops including (1) the 2-phase natural circulation in the bayonet cooling thimble transferring the decay heat to the second loop; (2) the 2-phase natural circulation between the air cooler and the steam drum; and (3) the open loop where steam in the air cooler was condensed by the circulation of air in the chimney. 48 A more detailed design was put forward with the L-type fin tube chosen as the heat exchanger tube of the air cooler.…”

Section: Passive Residual Heat Removal Systemsmentioning

confidence: 99%

“…48 The passive heat removal system is composed of 3 natural circulation loops including (1) the 2-phase natural circulation in the bayonet cooling thimble transferring the decay heat to the second loop; (2) the 2-phase natural circulation between the air cooler and the steam drum; and (3) the open loop where steam in the air cooler was condensed by the circulation of air in the chimney. 48 A more detailed design was put forward with the L-type fin tube chosen as the heat exchanger tube of the air cooler. 49 Thermalhydraulic characteristics of this type of PRHRS were investigated through a natural circulation experimental facility using the water 2-phase fluid.…”

Section: Passive Residual Heat Removal Systemsmentioning

confidence: 99%

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Review of conceptual design and fundamental research of molten salt reactors in China

Zhang

Liu

et al. 2018

Int J Energy Res

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Summary Molten salt reactor (MSR) as 1 candidate of the generation IV advanced nuclear power systems attracted more attention in China due to its top ranked in fuel cycle and thorium utilization. Two types of MSR concepts were studied and developed in parallel, namely the MSR with liquid fuel and that with solid fuel. Abundant fundamental research including the neutronics modeling, thermal‐hydraulics modeling, safety analysis, material investigation, molten salts technologies etc. were carried out. Some analysis software such as COUPLE and FANCY were developed. Several experimental facilities like high‐temperature fluoride salt experiment loop have been constructed. Some passive residual heat removal systems were designed, and 1 test facility is under construction. The key MSR techniques including the extraction and separation of molten salt and construction of N‐base alloy have been mastered. Based on these fundamental research, Chinese Academy of Sciences has completed the design of thorium‐based MSRs with solid fuel and liquid fuel and is promoting their construction in the near future. In China, future efforts should be paid to the material, online fuel processing, Th‐U fuel cycle, component design, and construction and thermal‐hydraulic experiments for MSR, which are rather challenging nowadays.

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“…Based on the residual heat removal system for the MSRE developed by Oak Ridge National Laboratory, a conceptual design with passive characteristics was completed using natural air cooling rather than the forced water circulation to cool (Figure 11). 48 A more detailed design was put forward with the L-type fin tube chosen as the heat exchanger tube of the air cooler. 48 A more detailed design was put forward with the L-type fin tube chosen as the heat exchanger tube of the air cooler.…”

Section: Passive Residual Heat Removal Systemsmentioning

confidence: 99%

“…Based on the residual heat removal system for the MSRE developed by Oak Ridge National Laboratory, a conceptual design with passive characteristics was completed using natural air cooling rather than the forced water circulation to cool the condenser (Figure 11). 48 The passive heat removal system is composed of 3 natural circulation loops including (1) the 2-phase natural circulation in the bayonet cooling thimble transferring the decay heat to the second loop; (2) the 2-phase natural circulation between the air cooler and the steam drum; and (3) the open loop where steam in the air cooler was condensed by the circulation of air in the chimney. 48 A more detailed design was put forward with the L-type fin tube chosen as the heat exchanger tube of the air cooler.…”

Section: Passive Residual Heat Removal Systemsmentioning

confidence: 99%

Section: Passive Residual Heat Removal Systemsmentioning

confidence: 99%

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Review of conceptual design and fundamental research of molten salt reactors in China

Zhang

Liu

et al. 2018

Int J Energy Res

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show abstract

“…Studies were also performed to test the passive system performance and the tolerance to thermal shock of the system. Sun et al 2 proposed that using bayonet cooling thimble scan improve the performance of residual system in a 10-MW MSR, and they performed a series of experimental and numerical works to verify the feasibility of their PRHRS design. [3][4][5] Chen et al 6 proposed a full-scaled PRHRS design with six cooling thimbles which have been used in the system for a 2-MW MSR.…”

Section: Introductionmentioning

confidence: 99%

Transient thermal‐hydraulic analysis of heat pipe cooled passive residual heat removal system of molten salt reactor

et al. 2020

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Summary As one of the representatives of fourth generation nuclear reactors, molten salt reactor technology has become the research focus worldwide. Higher passive safety requirements have been put forward for the nuclear reactor systems. In this paper, a conceptual design of a passive residual heat removal system for the molten salt reactor is presented and the mathematical and physical models are established. Based on FORTRAN programming language, the passive residual heat removal system analysis code is developed and validated. The code is used to analyze the safety of molten salt reactor under accident conditions, including unprotected reactivity introduction accident, unprotected overcooling, unprotected loss of flow, opening failure of the frozen valve and the startup accident of partial heat pipes. The results show that the passive residual heat removal system of molten salt reactor can discharge fuel salt decay heat effectively within 200 hours and ensure that the molten salt reactor to operate safely under all accident conditions. Above all, the system has good passive safety performance. The proposed passive residual heat removal system can satisfy the safety requirement of molten salt reactor. The feasibility of the conceptual design of the heat pipe cooled passive residual heat removal system is theoretically verified.

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“…T. Ishiguro et al proposed a PRHRS design for the FUJI‐233Um MSR system. Sun Lu et al conducted research on the conceptual design of a PRHRS for a 10 MW MSRE. Then based on this conceptual design, a series of experimental and numerical studies have been carried out .…”

Section: Introductionmentioning

confidence: 99%

Experimental study on the heat transfer characteristics of fluoride salt in the new conceptual passive heat removal system of molten salt reactor

et al. 2018

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Summary A new conceptual design of a passive residual heat removal system (PRHRS) has been proposed for molten salt reactor. High‐temperature heat pipes are used in this new design to improve the system inherent safety and make the PRHRS more compact. An experimental system using fluoride salt FLiNaK has been constructed to validate and support the future design of PRHRS of molten salt reactors. In this research, tests on the natural convection heat transfer of FLiNaK in the drain tank with an inclined heat pipe inserted at different heights were performed. The temperature distribution of fluoride salt in the tank was analyzed. The height of heat pipe and the bulk temperature of FLiNaK have little influence on the normalized salt temperature distribution. However, with the height of heat pipe increasing, the temperature difference of molten salt decreases and heat transfer coefficient of natural convection increases. In addition, the empirical correlations of natural convection heat transfer between liquid FLiNaK and inclined heat pipe are obtained within the range of Rayleigh numbers from 3.97 × 106 to 1.16 × 107. The comparisons show that a good agreement with less than 5% deviation is obtained between the proposed correlations and the test data.

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Conceptual design and analysis of a passive residual heat removal system for a 10 MW molten salt reactor experiment

Cited by 22 publications

References 15 publications

Review of conceptual design and fundamental research of molten salt reactors in China

Review of conceptual design and fundamental research of molten salt reactors in China

Transient thermal‐hydraulic analysis of heat pipe cooled passive residual heat removal system of molten salt reactor

Experimental study on the heat transfer characteristics of fluoride salt in the new conceptual passive heat removal system of molten salt reactor

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