STIR facility decontamination and disposition. Final report

The decontamination and disposition (D and D) of Building 028, Shield Test Irradiation Reactor (STIR) facilities, are complete. The core tank, the activated concrete structures surrounding the core tanks, the thermal column, the reactor shield, the test vault carriage, the water cooling systems, and the water shield door were removed, and the facility exhaust system was partially dismantled. The facilities were decontaminated to levels which were as low as practicable, but in all cases to levels below the limits described as acceptable for future unrestricted use. The more significant D and D activities are summarized, and special techniques are noted. Results of the radiological monitoring in support of the D and D operations and of the final radiological survey are presented