Study on Calculation Difference of the SCWR Core Steady-State Analysis Code

2020 ◽  
Vol 6 (3) ◽  
Author(s):  
Lianjie Wang ◽  
Lei Yao ◽  
Ping Yang ◽  
Di Lu ◽  
Wenbo Zhao
Keyword(s):  
Steady State ◽  
Cross Section ◽  
Power Distribution ◽  
Group Structure ◽  
Three Dimensional ◽  
Thermal Hydraulics ◽  
Steady State Analysis ◽  
Energy Group ◽  
The Cross ◽  
State Analysis

Abstract The three-dimensional code system supercritical water-cooled reactor (SCWR) coupled neutronics/thermal-hydraulics analysis (SNTA) code is developed for SCWR core steady-state analysis by coupling neutronics/thermal-hydraulics (N/T). This paper studies the calculation difference between the SNTA code and the standard reactor analysis code (SRAC). By using the impacts exclusive method, it is confirmed that the calculation difference between these two codes is caused by different feedback of the cross section. The cross section data and the energy group structure of the SRAC code differ from the SNTA code, and the density coefficient of reactivity calculated by the SRAC code is higher, which means the feedback of the density and power distribution is bigger and the axial power distribution varies rapidly. The SNTA code with finer energy group structure is suitable for the performance analysis of SCWR core which has strong N/T coupling characteristics.

Development of SNTA Code System for SCWR Core Steady-State Analysis

2017 ◽  
Vol 3 (2) ◽  
Author(s):  
Lianjie Wang ◽  
Wenbo Zhao ◽  
Ping Yang ◽  
Yongqiang Ma ◽  
Di Lu
Keyword(s):  
Steady State ◽  
Three Dimensional ◽  
Concept Design ◽  
Code System ◽  
Core Concept ◽  
Steady State Analysis ◽  
Outer Iteration ◽  
The Finite Difference Method ◽  
Supercritical Water Cooled Reactor ◽  
State Analysis

A coupled neutronics/thermal-hydraulics (N/T) three-dimensional code system SNTA is developed for supercritical water-cooled reactor (SCWR) core steady-state analysis by modular coupling the improved neutronics nodal methodological code and SCWR thermal-hydraulic subchannel code. The appropriate outer iteration coupling method and self-adaptive relaxation factor are proposed for enhancing convergence, stability, and efficiency of coupled N/T calculation. The steady-state analysis for the CSR1000 core is applied to verify SNTA. The results calculated by SNTA agreed well with those by CASIR and SRAC. SNTA is more efficient than CASIR and SRAC, where the neutronics modules are based on the finite-difference method. The numeric results show that SNTA can be applied to SCWR core steady-state analysis and core concept design.

scholarly journals Application of a new neutronics/thermal-hydraulics coupled code for steady state analysis of light water reactors

2020 ◽  
Vol 52 (8) ◽  
pp. 1603-1610 ◽  
Author(s):  
Amir Safavi ◽  
Mohammad Hossein Esteki ◽  
Seyed Mohammad Mirvakili ◽  
Mehdi Khaki Arani
Keyword(s):  
Steady State ◽  
Thermal Hydraulics ◽  
Light Water Reactors ◽  
Steady State Analysis ◽  
Light Water ◽  
Water Reactors ◽  
State Analysis

scholarly journals Steady-state Analysis of Supersonic Mixing Enhanced by a Three-dimensional Cavity Flow

Evergreen ◽  
2017 ◽  
Vol 4 (1) ◽  
pp. 44-51 ◽  
Author(s):  
Takayuki Oka ◽  
Taro Handa ◽  
Fujio Akagi ◽  
Sumio Yamaguchi ◽  
Toshiyuki Aoki ◽  
...  
Keyword(s):  
Steady State ◽  
Three Dimensional ◽  
Cavity Flow ◽  
Steady State Analysis ◽  
Supersonic Mixing ◽  
State Analysis
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