NUMERICAL STUDIES ON THE HEAT-UP PHASE OF SUPER-SARA "SEVERE DAMAGE" BOILDOWN TESTS
Calculations to investigate the heat-up phase of the Super-Sara "severe fuel damage" test matrix have been performed using a simple computer code which models a typical pin. In particular the effect of the exothermic zirconium water reaction on the transient is considered. It is shown that it is possible to achieve the desired objectives of all the tests by a test procedure involving a constant power level and a simple flow history. This flow history consists of an initial inlet flow, that has the water saturated at outlet. It is then linearly decreased in a time of the order of 200 seconds to a steady lower value. The clad temperature ramp rate is defined by the power and the peak clad temperature by the ratio of the power to the final steady inlet flow rate. If the final inlet flow rate for a particular power is below a certain critical value then the clad will reach melting temperature. The sensitivity of the results are discussed and a sample calculation is made for each test in the matrix.
Bibliographic Reference: EUR 8615 EN (1983) FS, 96 P., BFR 300, EUROFFICE, LUXEMBOURG, POB 1907
Availability: Can be ordered online
Record Number: 1989122016000 / Last updated on: 1987-01-01
Available languages: en