The Low-Temperature Neutron Irradiation Facility (LTNIF) is now operating in the Bulk Shielding Reactor at Oak Ridge National Laboratory. This facility provides high radiation intensities (approx. 2 x 1017 n/m2s, E> 0.1 MeV) and special environmental and testing conditions (irradiation temperatures from 4°K to 800°K). Sample transfer at 4°K is possible. This user facility is available for qualified experiments at no cost to users. A general description and major specifications of LTNIF are presented, along with the results of performance tests. The hardware and other considerations required to perform experiments in LTNIF are described.