Fine Distributed Moderating Material with Improved Thermal Stability Applied to Enhance the Feedback Effects in SFR Cores

<table>Difference in the neutron spectrum caused by the insertion of moderating material calculated with the 190 group library of HELIOS 1.9 and compared to the radiative capture cross-section of uranium-238.</table>

Science and Technology of Nuclear Installations

fig4

Figure 4

Figure 4: Fine Distributed Moderating Material with Improved Thermal Stability Applied to Enhance the Feedback Effects in SFR Cores 