MARSSIM-Based Graded Approach For Posting And Controlling Areas Containing Matrixed Contamination in Soil


J. D. Arana


Controlling outdoor areas with radioactive contamination matrixed into the soil presents unique challenges to effective radiological control and environmental restoration programs. These outdoor areas, classified as either Soil Contamination Areas (SCAs) or Underground Radioactive Material Areas (URMAs), based on the depth distribution of the contamination, constitute a large portion of the 1450 km2 (560 mi2) Hanford Site in southeastern Washington State. One of the largest challenges in dealing with these areas is the paucity of regulatory and/or interpretive guidance, particularly with 10 CFR 835, "Occupational Radiation Protection" (DOE 1999c), which does not address SCAs or URMAs. This leads to differing interpretations of applicable regulatory requirements and has caused inconsistency among the programs of various Hanford site contractors. To overcome these shortfalls, the Environmental Restoration Contractor (ERC) developed a graded approach for posting and controlling SCAs and URMAs that is based on the Multi-Agency Radiation Survey And Site Investigation Manual (MARSSIM, NRC 2000). This approach provides an additional regulatory margin and degree of worker protection that exceeds the requirements of 10 CFR 835.


This abstract was presented at the 35th Annual Midyear Meeting, "Decommissioning and Environmental Restoration", MARSSIM 1 Session, 2/17/2002 - 2/20/2002, held in Orlando, FL.

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