Calculating sensitivities and errors on residual power due to fission products

The study of sensitivity and error on residual power data is used to highlight nuclear data which must be well-known for safety analyses, for example in the case of a cooling accident in a reactor. The first part of this work focuses on a method of evaluation of independent fission yields on the one hand and their errors on the other hand; it will help establish the correlation that links the error to the residual power and error on the independent yields of nuclides. The second part deals with the evaluation of nuclide average energies that have a well-known spectra and their errors, but it is also about the assessment of nuclide average energies with unknown spectra and their errors. The third part deals with the different methods of period evaluation, and on the choice of error bars for nucleotide whose periods are not accompanied with an error bar. The fourth part deals with an assessment of the sensitivity of residual power to fission-independent yields at β + γ medium-sized energies and periods. These four steps allow to assess theoretical error on residual power for any what type of fissile isotope but also for any reactor type.