Allowable residual contamination levels for decommissioning, Part 2: a summary of example results

Conference · Mon Oct 01 04:00:00 EDT 1984

OSTI ID:6231072

Kennedy, Jr, W E; Napier, B A

This paper contains a description of the results of a study sponsored by UNC Nuclear Industries to determine Allowable Residual Contamination Levels (ARCL) for decommissioning facilities in the 100 Areas of the Hanford Site. ARCL results are presented both for surface contamination remaining in facilities (in dpm/100 cm/sup 2/) and for unconfined surface and confined subsurface soil conditions (in pCi/g). Two confined soil conditions are considered: contamination at depths between 1 and 4 m, and contamination at depths greater than or equal to 5 m. A set of worksheets are discussed for modifying the ARCL values to accommodate changes in the radionuclide mixture or concentrations, to consider the impacts of radioactive decay, and to predict instrument responses. Finally, a comparison is made between the unrestricted release ARCL values for the 100 Area facilities and existing decommissioning and land disposal regulations. For surface contamination, the comparison shows good agreement for a selected annual dose limit. For soil contamination, the comparison shows good agreement if reasonable modification factors are applied to account for the differences in modeling soil contamination and licensed low-level waste.

• Research Organization: Pacific Northwest Lab., Richland, WA (USA)
• DOE Contract Number: AC06-76RL01830
• OSTI ID: 6231072
• Report Number(s): PNL-SA-12053; CONF-841187-7-Pt.2; ON: DE85003632
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
210700 -- Nuclear Power Plants-- Regulation & Licensing
22 GENERAL STUDIES OF NUCLEAR REACTORS
220100* -- Nuclear Reactor Technology-- Theory & Calculation
ACTIVITY LEVELS
CONTAMINATION
CONTAMINATION REGULATIONS
DECOMMISSIONING
HANFORD ENGINEERING DEVELOPMENT LABORATORY
INDUSTRY
MATERIALS
MAXIMUM ACCEPTABLE CONTAMINATION
NATIONAL ORGANIZATIONS
NUCLEAR INDUSTRY
POLLUTION REGULATIONS
RADIOACTIVE MATERIALS
RADIOACTIVE WASTES
REACTOR DECOMMISSIONING
REACTOR SITES
REGULATIONS
SAFETY STANDARDS
STANDARDS
US DOE
US ORGANIZATIONS
WASTES