Purdue University – PUR-1 Nuclear Reactor

Purdue University Reactor Number 1 (PUR-1) is the first and only operating nuclear reactor in the state of Indiana. It is also the only facility licensed by the U.S. Nuclear Regulatory Commission (NRC) to operate with a fully digital safety and control system, placing it at the forefront of research reactor innovation. As one of 25 university research reactors in the United States, PUR-1 is recognized as part of the nation’s critical research infrastructure.

Mission and Impact
The primary mission of PUR-1 is education and workforce development—training the next generation of nuclear engineers and radiation science professionals. The reactor provides hands-on instruction that bridges classroom theory with real-world reactor operations, safety systems, and regulatory practices. Beyond education, PUR-1 serves as a neutron source for neutron activation analysis and other research applications. Its capabilities support a wide range of disciplines, including engineering, health sciences, chemistry, pharmacy, agriculture, biology, and nanotechnology. Purdue is an active member of the National Organization of Test, Research, and Training Reactors (TRTR), a consortium dedicated to supporting and advancing university reactor facilities nationwide.

Technical Capabilities
Licensed to operate by the NRC, PUR-1 transitioned from Highly Enriched Uranium (HEU) to Low Enriched Uranium (LEU) in 2007. It operates at a maximum thermal power level of 10 kW, and maintains an average thermal neutron flux of approximately 2.1 × 10¹¹ n/cm²·s. At this power level, the reactor offers exceptional operational flexibility while maintaining a robust safety envelope—making it well suited for instructional laboratories, experimental irradiation, and research activities.

Facility Tours

One of the primary roles the PUR-1 facility plays is education and outreach to the community about nuclear topics. We give approximately 1,500 guided tours of PUR-1 and other related labs each year. Each experience is tailored to visitor interests and age. During the tour, we traditionally discuss general radiation principles, common natural radiation sources, health effects of radiation, nuclear reactor basics, and of course take a look at Purdue's Nuclear Reactor. All tours are scheduled and confirmed in advance, and all visitors must have a valid ID on hand. Special arrangements and times can be accommodated for large groups.