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Frontiers in Energy

ISSN 2095-1701

ISSN 2095-1698(Online)

CN 11-6017/TK

邮发代号 80-972

2019 Impact Factor: 2.657

Frontiers in Energy  2021, Vol. 15 Issue (4): 810-831   https://doi.org/10.1007/s11708-021-0760-1
  本期目录
Latest research progress for LBE coolant reactor of China initiative accelerator driven system project
Long GU1(), Xingkang SU2
1. Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China; School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China; School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
2. Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China; School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
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Abstract

China’s accelerator driven subcritical system (ADS) development has made significant progress during the past decade. With the successful construction and operation of the international prototype of ADS superconducting proton linac, the lead-based critical/subcritical zero-power facility VENUS-II and the comprehensive thermal-hydraulic and material test facilities for LBE (lead bismuth eutectic) coolant, China is playing a pivotal role in advanced steady-state operations toward the next step, the ADS project. The China initiative Accelerator Driven System (CiADS) is the next facility for China’s ADS program, aimed to bridge the gaps between the ADS experiment and the LBE cooled subcritical reactor. The total power of the CiADS will reach 10 MW. The CiADS engineering design was approved by Chinese government in 2018. Since then, the CiADS project has been fully transferred to the construction application stage. The subcritical reactor is an important part of the whole CiADS project. Currently, a pool-type LBE cooled fast reactor is chosen as the subcritical reactor of the CiADS. Physical and thermal experiments and software development for LBE coolant were conducted simultaneously to support the design and construction of the CiADS LBE-cooled subcritical reactor. Therefore, it is necessary to introduce the efforts made in China in the LBE-cooled fast reactor to provide certain supporting data and reference solutions for further design and development for ADS. Thus, the roadmap of China’s ADS, the development process of the CiADS, the important design of the current CiADS subcritical reactor, and the efforts to build the LBE-cooled fast reactor are presented.

Key wordsLBE (lead bismuth eutectic) coolant reactor    China initiative Accelerator Driven System (CiADS) project    research progress
收稿日期: 2020-11-25      出版日期: 2022-01-04
Corresponding Author(s): Long GU   
 引用本文:   
. [J]. Frontiers in Energy, 2021, 15(4): 810-831.
Long GU, Xingkang SU. Latest research progress for LBE coolant reactor of China initiative accelerator driven system project. Front. Energy, 2021, 15(4): 810-831.
 链接本文:  
https://academic.hep.com.cn/fie/CN/10.1007/s11708-021-0760-1
https://academic.hep.com.cn/fie/CN/Y2021/V15/I4/810
Fig.1  
Fig.2  
Parameter Design value Operation value
CiADS Total power (reactor+ beam)/MW 10 10
Full power operation time/a 3 ≤3
Annual operation time/month 3 ≤3
Superconducting linac Accelerating particles Proton Proton
Energy/MeV 500 500
Maximum beam power/MW 2.5 2.26
Operation mode CW/pulse CW/pulse
High power spallation target Maximum bearable beam power/MW 2.5 2.26
Subcritical reactor Energy spectrum Fast neutron Fast neutron
Maximum thermal power/MW 10 9.76
Tab.1  
Fig.3  
Characteristic Value or description
Reactor type LBE-cooled fast reactor
Thermal capacity/MWth 10
Fuel composition and 235U enrichment UO2 (19.75 wt%)
Primary system Pool-type
Primary circulation Forced
Primary coolant LBE
Primary system pressure/MPa 0.1
Primary system temperature/°C 280–380
Number of primary heat exchanger 4
Primary pump Mechanical pump × 2
Secondary coolant Molten salt (Ternary Nitrates)
Secondary system pressure/MPa 0.1
Secondary system temperature/°C 220–230
Tab.2  
Fig.4  
Item Value
Reactor thermal power/MW 9.76
Number of fuel assemblies 52
Assembly pitch/mm 181
Active height/mm 1000
Average linear power/(W·cm–1) 1885.0
Fuel pin pitch/mm 13.4
Total fuel charge/kg 3880
Tab.3  
Fig.5  
Item Value
Inlet average temperature/°C 280
Core temperature difference/°C 100
Outlet average temperature/°C 380
Core total mass flowrate/(kg·s–1) 672
Core effective mass flowrate/(kg·s–1) 645
Average coolant flow velocity/(m·s–1) 0.316
Maximum coolant flow velocity/(m·s–1) 0.355
Maximum temperature of fuel centerline/°C 534.29
Maximum temperature of clad outer surface/°C 460.02
Maximum coolant temperature/°C 456.45
Main vessel pressure drop/MPa 0.0087
Core pressure drop/MPa 0.0030
Primary heat exchanger pressure drop/MPa 0.0526
Tab.4  
Fig.6  
Item No. Parameter name Value
Global parameters 1 Heat exchanger type C-tube type
2 Design pressure/MPa Atmospheric pressure
3 Design temperature/°C 400
4 Test pressure/MPa Atmospheric pressure
5 Test temperature/°C ≥15
6 Operating pressure/MPa Atmospheric pressure
7 Operating temperature/°C 380 (Shell side)/230 (Tube side)
8 Total number of heat exchangers 4
9 Thermal power/single/MW 2.5
Primary coolant parameters 1 Inlet temperature/°C 380
2 Outlet temperature/°C 280
3 Flowrate/single/(kg·s–1) 172.2
4 Internal pressure/MPa Atmospheric pressure+
Liquid column static pressure
Secondary side fluid parameters 1 Inlet temperature/°C 220
2 Outlet temperature/°C 230
3 Flow rate/single/(kg·s–1) 114.0
4 Internal pressure/MPa Atmospheric pressure
Tab.5  
No. Parameter name Value
1 Mass flow rate/(kg·s–1) 380
2 Head/m 2 (Lead bismuth liquid column)
3 Normal operating pressure/MPa Atmospheric pressure
4 Normal operating temperature/°C 280
5 Design temperature/°C 400
Tab.6  
Fig.7  
Fig.8  
Fig.9  
Fig.10  
Fig.11  
Fig.12  
Fig.13  
No. Parameter Value
1 Length/m 8.0
2 Width/m 6.0
3 Height/m 7.0
4 Coolant LBE
5 Oxygen control Cover gas
6 Design pressure/MPa 0.4
7 Loop material SS 316L
8 Tube size/mm 50(2” Sch80)
9 Total power/kW 500
10 Heat exchanger capacity/kW 500
11 Flow rate/(m3·h–1) 0–15.8
12 Maximum operating temperature/°C 450
Tab.7  
Fig.14  
Item Parameter
Main pump Maximum flow: 40 m3/h, head: 29 m
Heat exchanger Type: shell-and-tube, material: 316L
Turbine flowmeter Range: 1.5–15 m3/h, accuracy: 0.5%
Turbine flowmeter Range: 0.4–40 m3/h, accuracy: 0.5%
TS110 gauge pressure transducer Range: ?100U–100 kPa, accuracy: 0.25%
TS301 differential pressure transducer Range: –10–10 kPa, accuracy: 0.15%
Particle image velocimetry system TSI
Tab.8  
Fig.15  
Fig.16  
Fig.17  
Fig.18  
Fig.19  
Irradiated ion Temperature/°C Materials Irradiation dose point
246.8 MeV Ar12+ 350 SIMP 0.2/0.6 dpa
280 MeV Fe16+ 350 SIMP 0.2/0.6 dpa
3.5 MeV Fe13+ 20 316L/15-15Ti 0.01/0.1/0.01/10 dpa
3.5 MeV Fe13+ 350 316L/15-15Ti 0.01/0.1/0.01/10 dpa
3.5 MeV Fe13+ 450 316L/15-15Ti 0.01/0.1/0.01/10 dpa
3.5 MeV Fe13+ 550 316L/15-15Ti 0.01/0.1/0.01/10 dpa
Tab.9  
Corrosion mode Temperature/°C Materials Corrosion time
Static state 450 15-15Ti/316L 500/1000/2000/4000/6000/8000 h
550 SIMP/T91/15-15Ti/316L 500/1000/2000/4000/6000/10000 h
After helium ion irradiation 350 SIMP 4000 h
After helium ion irradiation 350 SIMP/T91 2000 h
Synergistic effect 350 SIMP 92h(1.36dpa)/135h(4.8dpa)/295h(13.7dpa)
Tab.10  
Fig.20  
Fig.21  
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