The Influence of B Burnable poison and T Production Li rod on Effective Multiplication Factor in the HTGR
Tritium (T) is required for engineering tests and the demo reactor first fuel load of fusion reactor, which uses DT reaction. In order to establish a T procurement method, it was proposed that T production method by loading Li in the high temperature gas-cooled reactor (HTGR). A loaded unit called Li rod replaces to the B burnable poison (BP) and produces T. There is a possibility that it causes differences in an effective multiplication factor (keff) by the BP atom change. This presentation shows the keff difference of the High Temperature engineering Test Reactor (HTTR) is evaluated. A cause is discussed if the keff characteristic changes. In addition, the same evaluation about the Gas Turbine High Temperature Reactor 300 (GTHTR300) is conducted and it is revealed whether the HTGR types influence the results.