Long-term experiences in keeping balance between safety and usability in research activities in KEKTadashi Murakami, Fukuko Yuasa, Ryouichi Baba, Teiji Nakamura, Kiyoharu Hashimoto, Soh Y. Suzuki, Mitsuo Nishiguchi and Toshiaki KanekoEPJ Web Conf., 214 (2019) 08001DOI: https://doi.org/10.1051/epjconf/201921408001