  The Proton Improvement Plan-II (PIP-II) [1] has been developed at Fermilab to
provide powerful proton beams to the laboratorys experiments. An 800-MeV
superconducting linear accelerator-a centerpiece of the project-is currently
under construction in Batavia, Illinois (USA). After completion, the
superconducting linac will be the starting point for the 1.2 MW (Phase 1) and
2.4-MW (Phase 2) proton beam that is needed for the Long-Baseline Neutrino
Facility (LBNF) at Fermilab [2]. Due to unavoidable loss of a fraction of the
beam in the accelerator components, a certain level of radiation will be
generated in the accelerator tunnel both during normal operation and at
accidents. This work deals with radiation shielding design for the accelerator
facility.
