A Study of the Covariance Data in ENDF/B VIII.0 for Low Z Isotopes

Thirty group covariance data have been produced from ENDF/B VIII.0 MF 33 for H1, H2, He4, Li6, Li7, Be9, B10, B11, C12, C13, N15, O16, the JENDL O16 and F19. Multi-group cross section was by NJOY routine ERRORR. Negative eigenvalues were found only F19, but constraints required condition of sum partial sections being equal to resultant total be incorrect O16. An easy correction is suggested Li6 C13. expansion ENDF-6 formats manual chapter a new proposed normalization scheme proposed.