  The MAJORANA collaboration is constructing the MAJORANA DEMONSTATOR at the
Sanford Underground Research Facility at the Homestake gold mine, in Lead, SD.
The apparatus will use Ge detectors, enriched in isotope \nuc{76}{Ge}, to
demonstrate the feasibility of a large-scale Ge detector experiment to search
for neutrinoless double beta decay. The long half-life of this postulated
process requires that the apparatus be extremely low in radioactive isotopes
whose decays may produce backgrounds to the search. The radioassay program
conducted by the collaboration to ensure that the materials comprising the
apparatus are sufficiently pure is described. The resulting measurements of the
radioactive-isotope contamination for a number of materials studied for use in
the detector are reported.
