Performance Analysis and Tube Inlet Orifice Length Evaluation of a Once–Through Steam GeneratorHun Sik Han, Han-Ok Kang, Juhyeon Yoon, Young In Kim, Youngmin Bae and Sang Ji KimE3S Web Conf., 128 (2019) 03001DOI: https://doi.org/10.1051/e3sconf/201912803001