At 12:59 a.m. the R-1 nuclear reactor at North Carolina State College achieved initial criticality in Raleigh. Criticality meant that the reactor had produced a controlled, self-sustaining nuclear chain reaction. This event made R-1 the first nuclear research reactor designed, constructed, and operated by an academic institution. It also made North Carolina State the first college to operate a nongovernmental reactor for teaching, research, and public service. The achievement placed Raleigh at the forefront of civilian nuclear education less than eight years after the atomic bombings of Hiroshima and Nagasaki had revealed nuclear fission’s destructive power.
North Carolina State began planning the reactor in 1950. Clifford K. Beck, a physicist recruited from Oak Ridge National Laboratory, proposed a joint project between the college and the United States Atomic Energy Commission. Beck argued that a campus reactor could support instruction and research at North Carolina State while serving Duke University, the University of North Carolina, regional medical schools, and other institutions. His proposal reflected the college’s established emphasis on applied science and engineering.
On June 5, 1950, the Atomic Energy Commission issued Contract AT-(40-1)-1032, which authorized design and safety analysis under the Atomic Energy Act of 1946. The planned reactor was a ten-kilowatt homogeneous “water-boiler” reactor. Its fuel consisted of uranyl sulfate dissolved in water, allowing the fuel and moderator to exist together in a liquid solution. The relatively low power level suited controlled experimentation and instruction rather than electrical generation.
Construction began in May 1951. Workers completed the biological shield that December, and the Wrenn-Wilson Construction Company of Durham began erecting the reactor building in January 1952. The building was finished in November. The combined reactor and laboratory cost approximately $630,000. The Burlington Mills Foundation contributed $200,000, and the resulting facility received the name Burlington Nuclear Laboratories. Its central reactor room occupied an octagonal space with a thirty-five-foot ceiling and sufficient clearance around the reactor for simultaneous experiments.
The reactor’s fuel arrived from Oak Ridge, Tennessee, on September 3, 1953, under armed escort. Two days later, the reactor reached criticality. The event demonstrated that a public land-grant college in North Carolina could manage technology that had previously remained concentrated within federal laboratories and military programs. NC State’s reactor program united federal resources, private industrial support, and state-supported technical education in a single institution.
R-1’s purpose distinguished it from reactors constructed primarily for weapons production or power development. Students could study reactor physics, radiation measurement, shielding, materials, and operating procedures through direct contact with an operating nuclear system. Faculty members could conduct experiments involving neutron behavior and radiation. The reactor therefore converted nuclear engineering from a subject taught mainly through calculations and theory into an academic discipline supported by laboratory experience.
The program soon produced significant educational results. In 1954, NC State established what its archival records describe as the nation’s only doctoral program in nuclear engineering at that time. Hervasio Guimarães de Carvalho of Brazil completed a doctorate in nuclear engineering that year, becoming one of the earliest recipients of such a degree. Physicist Raymond L. Murray, who had worked on criticality safety at Oak Ridge during the Manhattan Project, helped develop the curriculum and reactor program. His textbook, Introduction to Nuclear Engineering, first published in 1954, became a widely used instructional work.
R-1 operated until June 1955, when corrosion in its reactor vessel and cooling coils forced its shutdown. During its operational life, it generated approximately 60,000 kilowatt-hours of thermal energy. Engineers subsequently installed a redesigned homogeneous core within the original shielding. This system, designated R-2, achieved criticality in May 1957. NC State later operated the R-3 reactor and, beginning in 1972, the PULSTAR reactor, continuing the institutional program that R-1 had established.
The September 1953 achievement marked a major change in the public use of nuclear science. It brought reactor operation onto a civilian college campus, established Raleigh as an early center of nuclear engineering education, and provided a working model for university-based reactor programs. R-1’s importance rests less in its modest power than in its educational function: it placed a controlled nuclear chain reaction directly within the work of students, professors, and public research.
References / More Knowledge:
North Carolina Department of Natural and Cultural Resources. “State’s On-Campus Nuclear Reactor.” NC DNCR. https://www.dncr.nc.gov/blog/2016/09/05/states-campus-nuclear-reactor
North Carolina State University. “History of the Nuclear Reactor Program.” Nuclear Reactor Program. https://nrp.ne.ncsu.edu/history/
North Carolina State University College of Engineering. “Our History.” https://engr.ncsu.edu/about/history/
North Carolina State University Libraries. “Department of Nuclear Engineering.” Historical State Timelines. https://historicalstate.lib.ncsu.edu/timelines/department-of-nuclear-engineering
North Carolina State University Libraries. “First Temple of the Atom.” Special Collections Research Center. https://www.lib.ncsu.edu/specialcollections/eresources/text/engineering/reactor/index.html
North Carolina State University Libraries. “First Temple of the Atom: Burlington Nuclear Laboratories.” https://www.lib.ncsu.edu/specialcollections/eresources/text/engineering/reactor/EPbroch.html
North Carolina State University Libraries. “Raymond Leroy Murray Papers, 1919–2011.” https://www.lib.ncsu.edu/findingaids/mc00416
United States Department of Energy, Office of Scientific and Technical Information. “Nuclear Reactors.” https://www.osti.gov/servlets/purl/4182596