B Reactor can take a tour of the reactor by advance reservation. The reactor was designed and built by E. I. du Pont de Nemours and Company based on experimental designs tested by Enrico Fermi at the University of Chicago, and tests from the X-10 Graphite Reactor at Oak Ridge National Laboratory. It was designed to operate at 250 megawatts (thermal). The reactor occupies a footprint of (about and is tall, occupying a volume of . The reactor core itself consisted of a graphite box measuring occupying a volume of and weighing . It was penetrated horizontally through its entire length by
Enrico Fermi High School Public Schools. In November 2012, a town-wide referendum to appropriate $103 million for additions and renovations to Enfield High School overwhelmingly passed by a 2:1 margin. As a result of the consolidation Enrico Fermi High School is planned to close, resulting in yearly savings of $2 million, which would pay for bonding for the renovations and additions to Enfield High School. The State of Connecticut also will provide more than 70% reimbursement for construction to Enfield High School, as well. Students from Enrico Fermi will move into the expanded high school after construction is finished in 2016-2017, with an expected