Abstract
Small modular reactor (SMR) has drawn wide attention in the past decades, and Lead cooled fast reactor (LFR) is one of the most promising advanced reactors which are able to meet the safety economic goals of Gen-IV nuclear energy systems. A small modular natural circulation lead cooled fast reactor-100 MWth (SNRLFR-100) is being developed by University of Science and Technology of China (USTC). In the present work, a 3D CFD model, primary heat exchanger model, fuel pin model, and point kinetic model were established based on some reasonable simplifications and assumptions, the steady-state natural circulation characteristics of SNCLFR-100 primary cooling system were discussed and illustrated, and some reasonable suggestions were proposed for the reactor’s thermal-hydraulic and structural design. Moreover, in order to have a first evaluation of the system behavior in accident conditions, an unprotected loss of heat sink (ULOHS) transient simulation at beginning of the reactor cycle (BOC) has been analyzed and discussed based on the steady-state simulation results. The key temperatures of the reactor core are all under the safety limits at transient state; the reactor has excellent thermal-hydraulic performance.
Highlights
Among the generation of nuclear reactors, the lead fast reactor (LFR) is one of the most promising advanced reactors which are able to meet the safety goals of Gen-IV nuclear energy systems
Research about small modular reactor (SMR) has rapidly increased, which has been recognized as innovative production for niche markets due to the fact that they can be used for multipurpose applications of desalination, district heating, ship propulsion, and small scale power generation [2, 3]
In China, a 10 MW lead-alloy cooled reactor named CLEAR-I has been developed under the support of the Chinese Accelerator Driven Systems (ADS) project [9,10,11]; a small modular natural circulation lead cooled fast reactor-100 MWth (SNRLFR-100) is being developed by University of Science and Technology of China (USTC), which has multiple industrial applications, such as generating electricity and supplying heating
Summary
Among the generation of nuclear reactors, the lead fast reactor (LFR) is one of the most promising advanced reactors which are able to meet the safety goals of Gen-IV nuclear energy systems. In Korea, a SMR named URANUS which applied a passive cooling feature to both normal and abnormal operations is being developed by Seoul National University; the reactor has a refueling interval of 20 years without assembly reconfiguration and the rated thermal power is 100 MW, which is well suited as a distributed power source [8]. In China, a 10 MW lead-alloy cooled reactor named CLEAR-I has been developed under the support of the Chinese ADS project [9,10,11]; a small modular natural circulation lead cooled fast reactor-100 MWth (SNRLFR-100) is being developed by USTC, which has multiple industrial applications, such as generating electricity and supplying heating
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