A Novel Methodology for Maintaining Mechanical Integrity of High Pressure Relief Systems

2013 ◽  
Author(s):  
Sandipan Laskar
Keyword(s):  
High Pressure ◽  
Pressure Relief ◽  
Mechanical Integrity

Transient Analysis of Dedicated Pressure Relief Valve Under High-Pressure Condition in Severe Accident for Tianwan 56 Nuclear Power Plant

2020 ◽  
Author(s):  
Youyou Xu ◽  
Jian Deng ◽  
Xiaoji Wang ◽  
Lingjun Wu ◽  
Ming Zhang ◽  
...  
Keyword(s):  
High Pressure ◽  
Power Plant ◽  
Nuclear Power ◽  
Severe Accident ◽  
Feed Water ◽  
Pressure Condition ◽  
Relief Valve ◽  
Pressure Relief ◽  
Accident Sequences ◽  
Water Accident

Abstract In the management of severe accident of nuclear reactor, the pressure relief of reactor coolant system (RCS) is an important mitigation measure to prevent high pressure core melt (HPCM). In the safety system improvement of Tianwan56 nuclear power plant, the optimization measure of adding the dedicated pressure relief valve (DPRV) for severe accident were adopted. This improvement allows the reactor to release the pressure of RCS before the reactor vessel being damaged to mitigate the consequence of reactor melt accident under high-pressure condition. Based on the analysis of severe accident sequences, the total loss of feed water accident is confirmed to cover the various severe accident consequences which may lead to HPCM accident. This paper studied the transient characteristics of total loss of feed water accident sequences, and the factors such as valve opening delay on the operating temperature of the valve were researched. Finally, the representative and envelope operating condition of DPRV under severe accident was clarified. Besides, the temperature curve of fluid passing through the valve and the maximum temperature the valve experienced were obtained. This research provides the valuable and indispensable basis to the operability and integrity analysis of DPRV in severe accident.

scholarly journals Development of Ultra-high Pressure Cooling and Quick Freezing Device Based on Hydraulic Transmission

2019 ◽  
Vol 118 ◽  
pp. 02032
Author(s):  
Min Li ◽  
Changming Ling ◽  
Biao Ye ◽  
Junhao Cai ◽  
Wenzhen Wang ◽  
...  
Keyword(s):  
High Pressure ◽  
Energy Consumption ◽  
Pressure Relief ◽  
Ultra High Pressure ◽  
Whole Process ◽  
System Pressure ◽  
Transmission Design ◽  
Quick Freezing ◽  
Feeding Pressure ◽  
Continuous Work

Based on the theory of high pressure supercooling and pressure relief quick freezing, the ultra-high pressure instantaneous freezing device is developed. This device can break through the limitations of existing ultra-high pressure device design. Through the new hydraulic transmission design, It can complete fast pressurization, fast pressure relief and achieve continuous work. The matching of whole systems under certain load conditions, hydraulic transmission system, refrigeration system, pressure vessel and pressure relief system has been completed. The device can realize the whole process of ultra-high pressure quick freezing from food feeding, pressure cooling, pressure relief instant freezing and semi-automatic food discharging. Compared with the conventional same-capacity quick-freezing device, the energy consumption of the instantaneous freezing device under the design condition is only 24.52% of that of the traditional quick-freezing device, which greatly saves energy consumption. From the perspective of application, the design concept of ultra-high pressure quick-freezing device is perfected and the practical process of ultra-high pressure quick-freezing is advanced.

Study on the Performance of Pressure Release Valve Based on AMESim

2013 ◽  
Vol 753-755 ◽  
pp. 2659-2662
Author(s):  
Zhi Qing Wu ◽  
Hao Hui Shi
Keyword(s):  
High Pressure ◽  
Control System ◽  
Pressure Control ◽  
Hydraulic Cylinder ◽  
Control Performance ◽  
Pressure Relief ◽  
Release Process ◽  
Release System ◽  
Pressure Release ◽  
Relief System

The hydraulic cylinder should be safety released in high-pressure situations, the release valve system is presented under such situation in this paper, which can release the high pressure from the hydraulic cylinder, in order to validate its feasibility, the simulation model of pressure release system is established in AMESim, the pressure release process of which is studied, the results show that the pressure relief system can release the high pressure of hydraulic cylinder smoothly, the pressure release system verifies the pressure control performance of control system, some of the parameters or factors of pressure release system are analyzed.

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