抄録
An in-pile experimental research on fuel behavior under reactivity initiated accident conditions has been progressing in the NSRR (Nuclear Safety Research Reactor). The major objectives of the experiments are studied fuel failure mechanism and their thresholds, and the influence of mechanical energy generation subsequent to fuel failure.
During the period from October 1975 to December 1976, a total of 103 tests were carried out on the LWR type fresh fuel rods in the ambient temperature and pressure coolant. These tests consist of the following series; (1) scoping test, (2) waterlogged fuel test, (3) wide-gapped fuel test, and (4) miscellaneous test.
This report presents the major test results obtained in these tests.
