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Primordial or Big Bang nucleosynthesis (BBN) is one of the three strongevidences for the Big- Bang model together with the expansion of the Universeand the Cosmic Microwave Background radiation. In this study, we improve thestandard BBN calculations taking into account new nuclear physics analyses andwe enlarge the nuclear network until Sodium. This is, in particular, importantto evaluate the primitive value of CNO mass fraction that could affectPopulation III stellar evolution. For the first time we list the completenetwork of more than 400 reactions with references to the origin of the rates,including \approx 270 reaction rates calculated using the TALYS code. Togetherwith the cosmological light elements, we calculate the primordial Beryllium,Boron, Carbon, Nitrogen and Oxygen nuclei. We performed a sensitivity study toidentify the important reactions for CNO, 9Be and Boron nucleosynthesis. Wereevaluated those important reaction rates using experimental data and/ortheoretical evaluations. The results are compared with precedent calculations:a primordial Beryllium abundance increase by a factor of 4 compared to itsprevious evaluation, but we note a stability for B/H and for the CNO/Habundance ratio that remains close to its previous value of 0.7 \times 10-15.On the other hand, the extension of the nuclear network has not changed the 7Livalue, so its abundance is still 3-4 times greater than its observedspectroscopic value.

Standard Big-Bang Nucleosynthesis up to CNO with an improved extended nuclear network