EVALUATION OF THE DOSE LEVELS IN THE IRRADIATION CHANNELS OF PU-BE NEUTRON SOURCES STORAGE DEVICE BY USING NEUTRON ACTIVATION ANALYSIS AND MCNP6 MODELLINGE. Lagzdina, R. Plukienė, D. Lingis, J. Garankin, A. Plukis, D. Germanas and V. RemeikisEPJ Web Conf., 247 (2021) 16005DOI: https://doi.org/10.1051/epjconf/202124716005