Impact of the thermal scattering law of H in H2O on the isothermal temperature reactivity coefficients for UOX and MOX fuel lattices in cold operating conditions

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Fig. 4

Comparison of the ¹H and H in H₂O total cross-sections calculated at T = 300 K. The thermal energy cut-off is equal to 4.95 eV. Then, TRIPOLI4^® uses the Sampling of the Velocity of the Target nucleus (SVT) up to T_max = 400k_BT. Beyond this energy, the static Assymptotic Kernel (AK) approximation is applied.

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