The design and sensitivity of JUNO’s scintillator radiopurity pre-detector OSIRIS - Angel Abusleme; Thomas Adam; Shakeel Ahmad; Rizwan Ahmed; Sebastiano Aiello; Muhammad Akram; Fengpeng An; Guangpeng An; Qi An; Giuseppe Andronico; Nikolay Anfimov; Vito Antonelli; et al. (European Physical Journal C: Particles and Fields, 2021)