VERIFICATION AND VALIDATION OF BACK-END CYCLE SOURCE TERM CALCULATION OF THE NODAL CODE RAST-KJaerim Jang, Bamidele Ebiwonjumi, Wonkyeong Kim, Jinsu Park and Deokjung LeeEPJ Web Conf., 247 (2021) 10025DOI: https://doi.org/10.1051/epjconf/202124710025