This article describes the characteristic, structure and operation principle of self-powered detector used in nuclear power plant.It also provides a detailed study of escape probability calculation algorithm for self-powered detectorβparticle.This calculation algorithm is a preliminary study of the self-powered detectorβparticles escape probability, and can be used to guide the design of self-powered detector.%本文描述了核电站用自给能探测器的结构和工作原理等内容，并对自给能探测器β粒子逃脱率计算方法进行了详细研究。该计算方法是对自给能探测器β粒子逃脱率的初步研究，可以用于指导自给能探测器的设计工作。
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