Three Mile Island Accident of 1979 Knowledge Management Digest, Cleanup Safety Evaluations 1979-1993 (NUREG/KM-0001, Supplement 3)

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Publication Information

Date Published: June 2022

Division of Systems Analysis
Office of Nuclear Regulatory Research
U.S. Nuclear Regulatory Commission
Washington, DC 20555-0001

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Abstract

After the accident at Three Mile Island Generating Station, Unit 2 (TMI-2) in 1979, safety evaluations were required by the licensee and NRC for most cleanup activities and new cleanup systems. This supplement (Supplement 3) details the safety evaluations of 64 cleanup activities that were performed during the 1979-1993 period and has been organized into the following groups: data collection; pre-defueling preparations; defueling tools and systems; defueling operations; and liquid waste management systems.

The safety evaluations for each of the cleanup activities are discussed by safety topics which include: criticality; boron dilution; decay heat removal; fire protection; hydrogen generation; industrial safety; instrument interference; impact on Unit 1 activities; load drop; occupational exposure, including internal and external exposures; pyrophoricity; radiation protection/as low as reasonably achievable practice; radiological release; reactor vessel integrity; seismic hazard; radiation shielding; and vital equipment protection.

Supplement 3 is part of the NUREG/KM-0001 series and provides complimentary details of the TMI-2 cleanup activities which can be found in its preceding supplements. Supplement 1 provided summary descriptions of programs, activities, systems and tools that were long involved in the decade-long cleanup campaign of the damaged reactor core and severely contaminated equipment and buildings. The Digital Versatile Discs (DVDs) accompanying Supplement 1 contain most of the references cited in Supplement 3. Whereas Supplement 2
consolidated many of the experiences and lessons during the TMI-2 cleanup that had been recorded in numerous reports and papers. Contents of the DVDs are available at the Idaho National Laboratory Web site.