In-Situ Repairs in the Heavy Water Components Test Reactor

After nearly two years of nuclear operation, personnel entered the pressure vessel of the Heavy Water Components Test Reactor (HWCTR) to repair and modify a gas baffle near the core while irradiated fuel remained in the reactor. The work, which involved removing virtually all the reactor internal components down to the reactor core, was completed in about three weeks. Appropriate shielding and special clothing kept radiation exposure of personnel within allowable Savannah River Plant guides.