The MIT Nuclear Reactor Laboratory (MIT-NRL) is a university laboratory that conducts interdisciplinary research in the areas of advanced fuel and materials for nuclear energy systems, nuclear science, nuclear medicine, and radiation science and technology. The 6 MW MIT Nuclear Research Reactor (MITR) is equipped with experimental facilities available to users both within and outside MIT. We also provide technical assistance for research projects for high school students, undergraduate and graduate students, university researchers and faculty members, and national laboratory users. The image below is outside of the building where the reactor is. It is a strange area I think it match the place.
The MITR is a 5 MW, tank-type, heavy-water reflected, light-water cooled and moderated nuclear research reactor that utilizes finned, plate-type fuel elements. An in-core experimental facility can be installed in place of a reactor fuel element which has a cross-sectional area of 27 cm2and a length of 66 cm. Peak neutron fluxes are 1.2x1014n/cm2-s fast and 7x1013n/cm2-s thermal. The approximate dimensions for each experiment are 5 cm diameter by 60 cm high. Here is a color image of the above desscription. 
REFERENCES: (I did not go on the trip for some health reasons but I found a couple of information online