The paper overviews the current status of power plants' thermal control system and its reliability requirements. The research object of thermal control reliability assessment software platform was proposed and the software platform's network architecture、business processes and software modules were introduced. At last, paper summarizes the main features and technical characteristics of reliability assessment software developed to achieve.%概述了目前发电厂热控系统及其可靠性要求的现状，提出了热控系统可靠性评估软件平台的研发目标，介绍了该软件平台的网络架构、业务流程、软件模块，最后，总结了可靠性评估软件开发完成后实现的主要功能及其技术特点。
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