RECENT VALIDATION STUDY OF THE TECHNIQUE FOR EXPRESS EVALUATION OF BURNUP IN LEAKING FUEL ASSEMBLIES OF WWER POWER UNITSO.V. Vilkhivskaya, I.A. Evdokimov, V.V. Likhanskii and E.Yu. AfanasievaEPJ Web Conf., 247 (2021) 10013DOI: https://doi.org/10.1051/epjconf/202124710013