A HYBRID MONTE-CARLO-DETERMINISTIC METHOD FOR AP1000 EX-CORE DETECTOR RESPONSE SIMULATION Qi Zheng, Wei Shen, Xuesong Li, Tengfei Hao, Qingming He, Jie Li and Zhouyu Liu EPJ Web Conf., 247 (2021) 05003 Published online: 22 February 2021 DOI: 10.1051/epjconf/202124705003