Category Archives: ACCELERATOR DRIVEN SUBCRITICAL REACTORS

Deterministic versus Monte Carlo simulation codes

Deterministic codes need an a priori knowledge of the solution in order to obtain the convergence of the iterative process described previously (forexample, the calculation of mean cross-sections is a very delicate step which is generally system dependent). They have been developed in the past years, when computers were too slow. The predictions of such codes are limited but they […]

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Basic tallies

Tallies are quantities that are stored during an MCNP run. There are several tally types depending on what one wants to store (current, flux, …). Here, we will present only one type of tally and associated ‘modifier’: this tally is the one which calculates the neutron flux in a cell (or, when used with modifiers, counting rate, mean cross-section and […]

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