10 U.S.C. § 6142

(a) In General .— Except as provided in subsection (b), the following activities shall be carried out at the Savannah River Site, South Carolina: (1) All tritium recycling for weapons, including tritium refitting. (2) All activities regarding tritium formerly carried out at the Mound Plant, Ohio. (b) Exception .— The following activities may be carried out at the Los Alamos National Laboratory, New Mexico: (1) Research on tritium. (2) Work on tritium in support of the defense inertial confinement fusion program. (3) Provision of technical assistance to the Savannah River Site regarding the weapons surveillance program.