Pressurizer system dynamic model for transient control in PWR

IF 0.4 4区工程技术 Q4 NUCLEAR SCIENCE & TECHNOLOGY Kerntechnik Pub Date : 2022-10-06 DOI:10.1515/kern-2022-0038

H. Selim, N. El-Sahlamy

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Abstract

Abstract The pressurizer system of pressurized water reactor (PWR) maintains the reactor coolant system pressure during steady-state operation and limits pressure changes during transients. The in/out surge transients will cause pressure variations and they are controlled by either the spray system or the heater system. The spray system is actuated when the pressure exceeds a preset value. The heater system is initiated when the pressure falls below a preset value. The fundamental understanding and a reliable modeling of the pressurizer system behavior under steady state and transient conditions are needed to simulate overall nuclear power plant behavior. In the present study, an algorithm using Python 3.7 is developed to represent the dynamic behavior of the pressurizer system under steady-state and during in/out surge transients. Moreover, RELAP5 code is used to simulate the pressurizer system during the prescribed transients. The analysis and assessment results demonstrate satisfactory control performance during the in/out surge transients that guarantee the safety of PWR during operation. Also, the comparison between Python algorithm and RELAP5 model illustrates the capability and effectiveness of the Python algorithm for dynamic simulation and control.

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压水堆稳压器系统暂态控制动力学模型

压水堆(PWR)稳压器系统在稳定运行时维持反应堆冷却剂系统压力，并在瞬态运行时限制压力变化。输入/输出喘振瞬态将引起压力变化，它们由喷雾系统或加热系统控制。当压力超过预设值时，喷雾系统启动。当压力低于预设值时，加热系统启动。对稳压器系统在稳态和瞬态状态下的性能有一个基本的认识和可靠的建模是模拟整个核电站运行的必要条件。在本研究中，使用Python 3.7开发了一种算法来表示稳压器系统在稳态和进出喘振瞬态期间的动态行为。此外，还利用RELAP5代码对稳压器系统在规定的瞬态进行了模拟。分析和评价结果表明，进出喘振暂态控制性能良好，保证了压水堆运行安全。同时，将Python算法与RELAP5模型进行比较，说明了Python算法在动态仿真与控制方面的能力和有效性。

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来源期刊

Kerntechnik 工程技术-核科学技术

CiteScore

0.90

自引率

20.00%

发文量

审稿时长

6-12 weeks

期刊介绍： Kerntechnik is an independent journal for nuclear engineering (including design, operation, safety and economics of nuclear power stations, research reactors and simulators), energy systems, radiation (ionizing radiation in industry, medicine and research) and radiological protection (biological effects of ionizing radiation, the system of protection for occupational, medical and public exposures, the assessment of doses, operational protection and safety programs, management of radioactive wastes, decommissioning and regulatory requirements).