^（238）U裂变率测量中^（235）U裂变的修正

Correction method of ￣(235)U thermal fission in ￣(238)U fission rate measurement

叙述了一种用２３５Ｕ裂变室和２３８Ｕ裂变室在反应堆中同一位置上分别测量裂变率，并由此对２３８Ｕ裂变室所测量的裂变率进行修正的方法及其原理。用这种方法对石墨球床堆中２３８Ｕ裂变率测量结果进行了修正。修正结果与用包镉裂变室测量结果一致性很好。

This paper introduces a method and its principle of the correction for the measurement results of 238U fission chamber by using both 235U fission chamber and 238U fissionchamber at the same position in a reactor. The measurement results of 238U fission rate ingraphite pebble bed core have been corrected by this method. The corrected result is identical with the result measured by the fisson chamber covered with cadmium.