The EFIT project is a conceptual design for transmuting minor actinides in ADS. The sub-critical system is a Pb cooled core (384 MWth) coupled with a proton accelerator (800 MeV) impinging on a Pb target. The requirements and the optimization criteria have led lo the so called '42-0' concept. By this approach, the maximum minor actinide fission rate of 42 [kg 1Wh-1] is reached, as well as a zero net balance of plutonium. In this report, by means of the computer codes ERANOS and MCNPX, the system has been characterized from a neutronic point of view: the core referencecycle (together with the transmutation capabilities), the reactivity coeffieients, the power distribution in the core (to be used as input for the thermohydraulic analyses). Since the burn up swing during the cycle is only of about 200 pcm/year (to be compared lo the subcriticality of 3000 pcm), the proton current results approximately constant, never exceeding 16 mA.
|Titolo:||EFIT Core Reference Cycle Analysis and Reactivity Coefficients|
|Data di pubblicazione:||12-giu-2008|
|Appare nelle tipologie:||5.2 Documento in Garanzia della Qualità|