High Quality Content by WIKIPEDIA articles! The Chemistry and Metallurgy Research Replacement Facility, usually referred to as the CMRR, is a facility under construction at Los Alamos National Laboratory in New Mexico which is part of the United States` nuclear stockpile stewardship program. The facility will replace the aging Chemistry and Metallurgy Research (CMR) facility. It is located in Technical Area 55 (TA-55) and consists of two buildings: the Nuclear Facility (CMRR-NF) and the Radiological Laboratory, Utility, and Office Building (RLUOB). The two buildings will be linked by tunnels and will connect to LANL`s existing 30-year-old plutonium facility PF-4. The facility is controversial both because of spiraling costs and because critics argue it will allow for expanded production of plutonium `pits` and therefore could be used to manufacture new nuclear weapons.