A method to guarantee core subcriticality under uncertain conditions regarding neutron physical properties of fast reactor cores

摘要

A method for ensuring the subcriticality of a fast reactor core under uncertain conditions, which is obtained by performing physical measurements of the subcriticality of the reactor core after assembling the reactor core. Next, if there is a discrepancy between the obtained characteristic value and the set value, install an adjustable reaction rod in the reactor at the fuel part level of the reactor core. The boron B10 isotope enrichment of the tunable reaction rod is selected to be higher than the boron-B10 isotopic enrichment of the reactor core compensation rod. The technical results have been to improve the operating conditions of the absorbing elements of the compensator group, to eliminate the need for significant movement of the compensator bars, to simplify the monitoring of the technology used during production, and to the reactor It is to simplify the algorithm for safety control. [Selection] Figure 1