United States Nuclear Regulatory Commission - Protecting People and the Environment

Residual Radioactive Contamination From Decommissioning: User's Manual DandD Version 2.1 (NUREG/CR-5512, Volume 2)

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Publication Information

Manuscript Completed: March 2001
Date Published: April 2001

Prepared by:
K. McFadden, Sigma Software LLC
D.A. Brosseau, W.E. Beyeler, Sandia National Laboratories
C.D. Updegraff, Gram, Inc.

Sigma Software LLC
P.O. Box 1561
Peralta, NM 87042
Gram, Inc.
8500 Menaul Boulevard NE
Albuquerque, NM 87112

Under Contract to
Sandia National Laboratories
Albuquerque, NM 87185

R- Cady, NRC Project Manager

Prepared for:
Division of Risk Analysis and Applications
Office of Nuclear Regulatory Research
U.S. Nuclear Regulatory Commission
Washington, DC 20555-0001

NRC Job Code W6804

Availability Notice


The Decommissioning and Decontamination (DandD) software package developed by Sandia National Laboratories for the Nuclear Regulatory Commission (NRC) provides a user-friendly analytical tool to address the technical dose criteria contained in NRC's Radiological Criteria for License Termination rule (10 CFR Part 20 Subpart E). Specifically, DandD embodies the NRC's screening methodology to allow licensees to convert residual radioactivity contamination levels at their site to annual dose, in a way consistent with both 10 CFR Part 20 and the corresponding implementation guidance currently under development by NRC. The screening methodology and DandD are part of a larger decision framework that allows and encourages licensees to optimize decisions regarding alternative actions at their site, including the collection of additional data and information. The screening methodology employs reasonably conservative scenarios, fate and transport models, and default parameter values and parameter distributions to allow the NRC to quantitatively estimate the risk of terminating a license given only information about the level of contamination. A licensee has the option of specifying only the level of contamination and running the code with the default parameters or, if site-specific information is available, modifying scenario pathways or providing site-specific parameter distributions and then calculating dose. The original draft of Volume 2 of the NUREG/CR-5512 series documented a User's Manual for the deterministic Version 1.0 of the DandD software. This final version of Volume 2 provides an entirely new User's Manual for the Version 2.1 release of DandD, thus superceding and replacing DandD Version 1.0 and its draft User's Manual. The latest version of the software allows probabilistic (Monte Carlo) dose assessments and incorporates a new and improved Microsoft® Windows® standard user interface.

Page Last Reviewed/Updated Tuesday, March 15, 2016