THE TWO-STEP APPROACH FOR WHOLE-CORE RESONANCE SELF-SHIELDING CALCULATION Shuai Qin, Qian Zhang, Liang Liang, Qingming He and Hongchun Wu EPJ Web Conf., 247 (2021) 03014 Published online: 22 February 2021 DOI: 10.1051/epjconf/202124703014