Download Nuclear Data Needs for Generation IV Nuclear Energy Systems by Peter Rullhusen PDF

By Peter Rullhusen

This quantity provides fresh development within the development of the nuclear database wanted for the improvement of new release IV nuclear power platforms. The iteration IV foreign discussion board (GIF) pointed out six complicated strategies for sustainable nuclear power creation at aggressive costs and with complicated protection, with certain realization to nuclear non-proliferation and actual security concerns, minimization of long-lived radiotoxic waste, and optimal traditional source usage procedure teams were tested for learning those options intimately, and nuclear facts are an inherent a part of those experiences. This publication studies the paintings lately played for the improvement of those structures. The contributions comprise an updated evaluation of contemporary achievements in sensitivity research, version calculations, estimates of uncertainties, and the current prestige of nuclear databases in regards to their functions to new release IV structures. within the workshop, distinct realization used to be given to the identity of nuclear information wishes from sensitivity research of benchmark experiments and the remedy of uncertainties. The complaints include overviews of a number of experimental software and up to date result of curiosity for the improvement of iteration IV structures.

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Effects of the cross section models As mentioned, the SCFR presents to the analyst new and unique features, which require the use of new or extremely flexible tools of investigation. Hence the " 1 $ corresponds to 377 pcm for the SCFR core at the beginning of cycle. 42 decision to adopt and develop a coupled fluid-dynamics Monte-Carlo system to take into account as accurately as possible the different phenomena, which determine the void reactivity coefficient. g. fuel and coolant temperature and density distributions) helped reducing the uncertainties related to the method of analysis.

These ratios are calculated at the centre of the core and are respectively representative of intermediate and fast neutrons. They also concern important isotopes for the studied GFR concept. Table 2. Uncertainties due to nuclear data. 2 uncertainty in reactivity is essentially due to the Pu239 fission for which the sensitivity coefficient is very important. The 52 contribution of this reaction represents 72% of the total uncertainty. With the adjusted data, the contribution of this reaction is decreased and the total uncertainty is better distributed over the different elements.

2 Nuclear Data Scattering (pcnV%) a i 3 a ¥ %5 ^ 5 J 3 Q. 3 0. 3 Q- 3 CL 3 Q. _ ) ' * 4 s $ s 2 £ S z C ^ QGFR B Phenix Figure 3. 2 nuclear data scattering. E+03 Energy (Mev) Figure 4. 2 elastic scattering. 51 A preliminary study was performed in order to find out if these specificities imply new sources of uncertainties which would impact the preliminary conclusions of the GFR studies. Uncertainties due to nuclear data have been quantified for the reactivity and different reaction rate ratios in the core, representative of various energy domains [3].

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