Compact Engineering Simulator for HTR-PM by Embedding THERMIX Code in vPower Simulation Platform

2010 ◽  
Author(s):  
Qiang Gao ◽  
Yangping Zhou ◽  
Zhiwei Zhou ◽  
Zhe Sui ◽  
Yuanle Ma ◽  
...  
Keyword(s):  
Simulation Platform ◽  
Steam Generators ◽  
Water Steam ◽  
Secondary Loop ◽  
Design Values ◽  
Machine Interface ◽  
Module Structures ◽  
Procedure Development ◽  
Good Agreement ◽  
Rankin Cycle

This paper describes the development of a compact engineering simulator of Pebble-bed Modular High Temperature Gas-cooled Reactor (HTR-PM) by embedding THERMIX code into the vPower simulation environment. The compact engineering simulator consists of modules for two reactors, two steam generators and entire secondary loop system for power generation with a water-steam Rankin cycle. Two THERMIX modules are employed to simulate the two primary loops corresponding to the two reactors in the HTR-PM respectively. Then, the vPower synchronizes the two THERMIX modules in executing simulation to such two reactor module-structures of HTR-PM. The simulation modules for secondary loop and human machine interface are mainly developed with intrinsic models of vPower simulation platform. Current simulation results are in good agreement with the design values and safety analysis results of HTR-PM. The compact HTR-PM engineering simulator will be improved and validated for safe analysis, procedure development and design change verification.

HTR-PM Simulation Analysis of Accident Conditions Based on vPower Platform

2014 ◽  
Author(s):  
Tang Yang ◽  
Yangping Zhou ◽  
Zhiwei Zhou ◽  
Zhang Dabin
Keyword(s):  
Simulation Analysis ◽  
Mutual Influence ◽  
Reactor Power ◽  
Steam Generators ◽  
Water Steam ◽  
Steady State Operation ◽  
Design Values ◽  
Accident Conditions ◽  
Good Agreement ◽  
Rankin Cycle

HTR engineering simulator can be achieved by embedding THERMIX code into the vPower simulation environment. The engineering simulator consists of double-module reactors, two steam generators and entire secondary loop system for power generation with a water-steam Rankin cycle. The engineering simulator can be applied to simulate the steady-state operation, but also transient and accident state of HTR-PM. This paper analyzes the trends of reactor power, helium flow, steam generator inlet parameters, turbine inlet parameters and other key parameters under accident conditions, as well as the mutual influence between the two module reactors during accident process. Current simulation results are in good agreement with the design values and safety analysis results of HTR-PM.

Long-Term Simulation of Sodium Dynamics During a Large Leakage Sodium-Water Reaction

2021 ◽  
Author(s):  
Xi Bai ◽  
Peiwei Sun ◽  
Gang Luo ◽  
Huasong Cao
Keyword(s):  
Steam Generator ◽  
Safety Analysis ◽  
Euler Method ◽  
Maximum Pressure ◽  
Parameter Method ◽  
Loop Model ◽  
Long Term Effects ◽  
Water Steam ◽  
Secondary Loop

Abstract The steam generator of the sodium-cooled reactor is the barrier between the secondary and third loops. When the heat transfer pipe breaks, the water/steam will pour into the sodium and a sodium-water reaction will occur. The pressure in the secondary loop will increase and the rupture disks will burst to reduce the pressure. For the safety analysis, the maximum pressure is limited. For the long term, the pressure pulse weakens and the fluid flow tends to a quasi-steady state several seconds or minutes after leak initiation. Therefore, it is necessary to develop a model to investigate the dynamics of the secondary loop in the long term. The continuity equation, the momentum equation and the energy equation are used to derive the sodium flow model in the secondary loop. The sodium pressure and velocity are described by the one-dimensional differential equation. The lumped parameter method is applied and the differential equations are solved by the Euler method. FORTRAN language is compiled to develop the code. Critical equipment, including the steam generator, buffer tank, pump, rupture disks, and accident discharge tank are considered in the secondary loop model. The sodium velocity and pressure responses varying with time can be obtained. Compared with the data from the safety analysis report, the tendency of the sodium velocity and pressure is consistent. It is proved that the model is reasonable and effective to simulate and analyze the actual long-term effects of sodium dynamics.

scholarly journals An Integrated Dynamic Simulation Platform for Assistive Human-Robot Interaction: Application to Upper Limb Exosuit

2021 ◽  
Author(s):  
Ratna Sambhav ◽  
Shreeshan Jena ◽  
Ankit Chatterjee ◽  
Sitikantha Roy ◽  
Shubhendu Bhasin ◽  
...  
Keyword(s):  
Dynamic Simulation ◽  
Human Robot Interaction ◽  
Muscle Performance ◽  
Simulation Platform ◽  
Robot Interaction ◽  
Machine Interface ◽  
Robotic Devices ◽  
Muscle Activations ◽  
Feedback Control Strategy ◽  
Lifting Task

Soft exosuits are wearable robotic devices that assist or enhance the human muscle performance. A human machine interface simulation platform based on MATLAB-OpenSim interface is developed in this paper for closed loop dynamic simulation with feedback control strategy and to study its effect on human physiology. The proposed simulation model is based on Computed Muscle Control (CMC) algorithm and is implemented using the MATLAB -OpenSim interface. A Gravity Compensation (GC) controller has been implemented on the external device and the resulting decrease in the physiological torques, muscle activations and metabolic costs during a simple load lifting task with two different speeds is investigated.

scholarly journals An Integrated Dynamic Simulation Platform for Assistive Human-Robot Interaction: Application to Upper Limb Exosuit

2021 ◽  
Author(s):  
Ratna Sambhav ◽  
Shreeshan Jena ◽  
Ankit Chatterjee ◽  
Sitikantha Roy ◽  
Shubhendu Bhasin ◽  
...  
Keyword(s):  
Dynamic Simulation ◽  
Human Robot Interaction ◽  
Muscle Performance ◽  
Simulation Platform ◽  
Robot Interaction ◽  
Machine Interface ◽  
Robotic Devices ◽  
Muscle Activations ◽  
Feedback Control Strategy ◽  
Lifting Task

Soft exosuits are wearable robotic devices that assist or enhance the human muscle performance. A human machine interface simulation platform based on MATLAB-OpenSim interface is developed in this paper for closed loop dynamic simulation with feedback control strategy and to study its effect on human physiology. The proposed simulation model is based on Computed Muscle Control (CMC) algorithm and is implemented using the MATLAB -OpenSim interface. A Gravity Compensation (GC) controller has been implemented on the external device and the resulting decrease in the physiological torques, muscle activations and metabolic costs during a simple load lifting task with two different speeds is investigated.

All-weather-available electrothermal and solarthermal wood-derived porous carbon-based steam generators for highly efficient water purification

2022 ◽  
Author(s):  
Jing Wu ◽  
Xiaofeng Li ◽  
Tingting Zhang ◽  
Xiao-Peng Li ◽  
Wei Li ◽  
...  
Keyword(s):  
Water Purification ◽  
Porous Carbon ◽  
Light Irradiation ◽  
Solar Light ◽  
Steam Generation ◽  
Steam Generators ◽  
Water Steam ◽  
Solar Light Irradiation ◽  
Solar Steam Generation ◽  
Carbon Based

Solar steam generation devices cannot work properly under weak solar light irradiation and even no solar light. Herein, an all-weather-available electrothermal and solarthermal wood-derived porous carbon-based water steam generation device...

Design of sodium-water steam generators

1976 ◽  
Vol 40 (4) ◽  
pp. 353-355
Author(s):  
P. L. Kirillov ◽  
V. M. Poplavskii
Keyword(s):  
Steam Generators ◽  
Water Steam

Prediction of Hydrogen Distribution Under Severe Accident Conditions With CFD and Lumped Parameter Codes

2012 ◽  
Author(s):  
Tobias Szabó ◽  
Stefan Benz ◽  
Frank Kretzschmar ◽  
Peter Royl ◽  
Thomas Jordan
Keyword(s):  
Source Term ◽  
Severe Accident ◽  
Test Bed ◽  
Hydrogen Distribution ◽  
Water Steam ◽  
Lumped Parameter ◽  
Accident Conditions ◽  
Energy Balances ◽  
Mass And Energy Balances ◽  
Good Agreement

In case of a severe accident, the containment is the ultimate barrier to the environment. Therefore, reliable simulations tools for containment thermal hydraulics, including hydrogen distribution are indispensable. We simulated the behavior of the containment atmosphere under severe accident conditions with a postulated source term of water, steam and hydrogen. We used a detailed 3D CFD code (GASFLOW) and a lumped parameter code (MELCOR) in order to compare and assess their modeling capabilities. A simplified generic containment including all important components was used as a test bed. We analyzed the calculated pressure histories, mass and energy balances, convective flow as well as steam and hydrogen distributions. Integral values were modeled in good agreement by both codes. The overall flow was reasonably predicted. However we observed discrepancies in the calculated steam and hydrogen concentrations.

Soviet-French Seminar on Sodium-Water Steam Generators

1979 ◽  
Vol 47 (4) ◽  
pp. 867-869
Author(s):  
P. L. Kirillov
Keyword(s):  
Steam Generators ◽  
Water Steam

Research of Fast Modeling and Simulating Platform for Nuclear Power Plant Secondary Loop

2018 ◽  
Author(s):  
Meijie Gong ◽  
Minjun Peng ◽  
Haishan Zhu
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Simulation Model ◽  
Nuclear Power ◽  
Device Simulation ◽  
Loop System ◽  
Design Parameters ◽  
Simulation Platform ◽  
Characteristic Analysis ◽  
Secondary Loop

Secondary loop system is an essential part in nuclear power plant (NPP). The traditional methods for the secondary loop cannot reveal the universality for the most of the NPPs. When there is the need to build another NPP secondary loop simulation program or project, the simulation model always need to modify or adapt to the new design parameters and operation parameters. In this work a fast modeling simulation platform for secondary loop in NPP is developed. In this simulation platform there is the modular, parametric simulation model in the device library and graphical human-computer interaction. There is the modeling procedure for the NPP secondary loop system simulating and modeling. In the device library there are different simulation models of secondary loop system. The secondary loop simulation model can be made up by the device simulation model with reasonable data interface. Each device simulation model could represent the practical device steady and dynamic performance with accurate calculation. The simulation results calculated in the simulation platform can represent the accuracy steady calculation and reasonable dynamic tendency of main parameters for the secondary loop system built. From the simulation platform the NPP secondary loop system simulation model can be built conveniently and fast. In the simulation platform there is the appropriate data input form and output form. The simulation platform can be used in the different purposes of simulation for NPP secondary loop as training, evaluating, operation and characteristic analysis.

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