The development of Technical Specifications of Nuclear Power Plant in USA is described. Several modifications of Westinghouse PWR Plants ' Technical Specifications,which are concerned recently, are introduced briefly.Related content involved in these modifications is discussed.%简要描述了美国核电厂运行技术规格书的发展过程,对近期跟踪的几项美国西屋压水堆核电厂运行技术规格书的修改做了简要介绍,并对修改的内容进行了探讨。
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