This dialog allows you to enter the DCGLw for a given decay chain. Note: the picture below is for the Thorium-230 chain; other chains show their respective nuclides, but the data entry works the same.
The appropriate setup of radionuclides is discussed in Multi-Agency Radiation Survey and Site Investigation Manual (MARSSIM) (EPA 2000). This document is currently available at: https://www.epa.gov/radiation/multi-agency-radiation-survey-and-site-investigation-manual-marssim
The dialog contains the following controls:
Surface Soil radio button |
Select to enter the DCGLw in pCi/g units for surface soil. |
Building Surface radio button |
Select to enter the DCGLw in dpm/100cm2 units for building surfaces. |
DCGLw |
Enter the DCGLw for the series in the specified units. |
Lookup NRC Value button |
Click this button to automatically set the DCGLw to the screening value from NRC NUREG 1757, Table H.1 for building surfaces or Table H.2 for surface soil. |
EPA. 2000. Multi-Agency Radiation Survey and Site Investigation Manual (MARSSIM). NUREG-1575, Rev. 1, EPA 402-R-97-016, Rev.1, DOE/EH-0624, Rev. 1. Environmental Protection Agency, Office of Research and Development, Quality Assurance Division, Washington DC.
NRC. 2006. Consolidated Decommissioning Guidance: Characterization, Survey, and Determination of Radiological Criteria. NUREG-1757, Vol. 2, Rev. 1. U.S. Nuclear Regulatory Commission, Office of Nuclear Material Safety and Safeguards, Washington, DC.