We investigate the long-term evolution and observability of remnants originating from the merger of compact binary systems and discuss the differences to supernova remnants. Compact binary mergers expel much smaller amounts of mass at much higher velocities, as compared to supernovae and therefore the free expansion phase of the remnant will be short (∼ 1 10 yr). But merger events with high mas...

— On the basis of systematic trends in X-ray photoemission core-level spectra of the rare earth elements and the adjacent elements, it is suggested that the 5s, 5p3/2 and 4d levels of the actinides should exhibit strong many-electron effects. The available actinide data appears to support the above predictions.

Covariance matrix evaluations in the fast energy range were performed for a large number of actinides, either using low-fidelity techniques or more sophisticated methods that rely on both experimental data as well as model calculations. The latter covariance evaluations included in the ENDF/B-VII.1 library are discussed for each actinide separately.

This paper presents the French contribution to the Joint Study of the IAEA’s International Project on Innovative Nuclear Reactors and Fuel Cycles (INPRO). It concerns the application of the INPRO methodology to a French scenario, on the transition from present LWRs to EPRs in a first phase and to 4th generation fast reactors in a second phase during the 21st century. The scenario also considers...

Spent fuel transportation and storage cask designs based on a burnup credit approach must consider issues that are not relevant in casks designed under a fresh-fuel loading assumption. For example, the spent fuel composition must be adequately characterized and the criticality analysis model can be complicated by the need to consider axial burnup variations. Parametric analyses are needed to ch...

This report summarizes work after 3 years of the project. Activities so far included: 1) development and testing of sampling and analytical techniques for both actinides and organic constituents from natural waters, 2) confirmation of Pu and organic carbon concentrations, 3) field work at the Savannah River site (SRS) and at Hanford site (HS), and sample analysis, and 4) preparation of publicat...

We introduce a formalism to compute the neutron magnetic form factor FM(q) within a first-principles density functional theory and dynamical mean field theory. The approach treats spin and orbital interactions on the same footing and reduces to earlier methods in the fully localized or the fully itinerant limit. We test the method on various actinides of current interest NpCoGa5, PuSb and PuCoG...