The joint evaluated fission and fusion nuclear data library, JEFF-3.3

The joint evaluated fission and fusion nuclear data library 3.3 is described. New evaluations for neutron-induced interactions with the major actinides $^{235}$U, $^{238}$U and $^{239}$Pu, on $^{241}$Am and $^{23}$Na, $^{59}$Ni, Cr, Cu, Zr, Cd, Hf, W, Au, Pb and Bi are presented. It includes new fission yields, prompt fission neutron spectra and average number of neutrons per fission. In addition, new data for radioactive decay, thermal neutron scattering, gamma-ray emission, neutron activation, delayed neutrons and displacement damage are presented. JEFF-3.3 was complemented by files from the TENDL project. The libraries for photon, proton, deuteron, triton, helion and alpha-particle induced reactions are from TENDL-2017. The demands for uncertainty quantification in modeling led to many new covariance data for the evaluations. A comparison between results from model calculations using the JEFF-3.3 library and those from benchmark experiments for criticality, delayed neutron yields, shielding and decay heat, reveals that JEFF-3.3 performes very well for a wide range of nuclear technology applications, in particular nuclear energy

Determination of the transfer of cesium and iodine from feed into domestic animals.

The 137Cs transfer coefficients for meat were: 0.01 d/kg beef (cow), 0.038 d/kg beef (heifer), 0.038 d/kg (bull), 0.35 d/kg veal, 0.4 d/kg pork, 0.33 d/kg sheep, 0.28 d/kg fallow deer and 1.3 d/kg chicken. The transfer coefficients for cow's milk were 0.007 d/1 (131I) and 0.003 d/1 (137Cs), and for sheep's milk 0.06 d/1 (137Cs). In egg-white and yolk transfer coefficients for 137Cs of 0.2 and 0.1 d/kg, respectively, were determined. Biological half-lives and the influence of feed additives on the activity concentrations in meat and animal products are described

Hot Neutrons and their Applications at FRM II Reactor

Neutrons with energies between 0.1 and 1 eV slightly above the typical thermal spectrum of a research reactor, often-called hot neutrons, are valuable probes for different scientific applications. Their use in the neutron diffraction, spectroscopy, absorption or irradiation experiments often provides results of superior quality in comparison to thermal neutrons or even results unreachable by the use of the latter. At FRM II, hot neutrons are generated by a dedicated secondary source in the moderator tank, which shifts the spectrum of the moderated neutrons towards higher energies. A beamline with two channels pointing to the centre of the hot source extracts the re-moderated neutrons towards the two dedicated experimental installations POLI and HEiDi. Here, we present the design of the hot neutron source and related instrumentation. In addition, a few representative examples of their use from the fields of crystallography, magnetism and nuclear physics are shown to demonstrate their usefulness