Test Report Determining the Location of Hydraulically Supported Absorber Balls in a Shutdown Assembly for LMFBR'S

摘要

Tests were conducted on acoustic detectors and sonic generators to develop a position location system for the hydraulically supported absorber balls shutdown subassemblies. Results showed that the use of an acoustic detector along with a sonic generator will enable the reactor operator to verify that all the absorber balls are stacked above the reactor core in a normal configuration during reactor startup and operation. Also, any balls swirling or jammed in the core region can be detected. The acoustic sensor will be attached to the outside of the LMFBR's pressure vessel. Extraneous sounds, such a pump noise will be electronically blocked out. (ERA citation 07:004219)