procedures for the determination and elimination of faulty 'pebbles' for pebble bed reactors

摘要

1286545 Testing fuel elements BROWN BOVERI KRUPP REAKTORBAU GmbH 28 Aug 1969 [5 Sept 1968] 43009/69 Heading G6C Spherical fuel elements circulating through a pebble bed reactor are tested to determine whether they contain damaged fuel particles by providing a chamber in which fuel elements leaving the reactor are heated to a temperature around the reactor operating temperature. The fuel elements then pass individually to a heated measuring chamber where the gaseous fission products released by each element are determined by a gamma spectrometer. According to the measurement obtained thereform a fuel element is either re-circulated or discarded.