  Part 1 of "Project X: Accelerator Reference Design, Physics Opportunities,
Broader Impacts". Part 1 contains the volume Preface and a description of the
conceptual design for a high-intensity proton accelerator facility being
developed to support a world-leading program of Intensity Frontier physics over
the next two decades at Fermilab. Subjects covered include performance goals,
the accelerator physics design, and the technological basis for such a
facility. Part 2 is available as arXiv:1306.5009 [hep-ex] and Part 3 is
available as arXiv:1306.5024 [physics.acc-ph].
