Characterization Program Support:
The focus of this program is to evaluate your company’s overall waste characterization program, from procedures, to sample collection, segregation versus mixing of materials, and package assessments, to ensure methods are consistent and results make sense. The objective of this effort is to verify that methods and processes are not over-classifying the waste, and that the amount of Class A waste is maximized. The study may validate existing methods and/or provide recommendations for improvement with the focus on maintaining a defendable program. We believe that this program will provide a net savings to your company by minimizing your Class B/C Waste.
Sample History and Scaling Factor Development:
Studies have shown that scaling factors developed from single-sample data are frequently not representative of the actual activity concentrations in the waste. Waste classifications develolped from these scaling factors may not be accurate and may increase the cost of disposal. The DW James Consulting staff will work with you to evaluate your radioactive waste sample history and perform a sanity check on laboratory results, particularly as they relate to classification controlling radionuclides. We will use our proprietary methods to identify anomalous data and provide the basis information for plant staff to evaluate and follow through with laboratory suppliers as appropriate. The analysis will provide a basis for a more statistically defendable and reliable set of scaling factors for waste characterization that will reduce the potential for over-classification of waste.
Source Term Analysis and Operational Data Trending:
The staff here at DW James Consulting has observed that trending some data that is routinely collected for operational purposes can improve understanding of the behavior of isotopes in radioactive waste. Monitoring this data can identify operational changes that can affect activity concentrations for classification controlling radionuclides or help identify anomalous sample data. We can help utility staff set up an appropriate monitoring program and assist with interpretation of the data. DWJC can calculate waste source terms from reactor coolant data using methods described in an NRC-approved Topical Report (NRC ADAMS Accession Number ML15051A417).
DWJC feels that waste generation can be a planned evolution rather than reactive. System operation can be optimized and adjustments can then be made, based on the individual company’s needs and resources, to ensure waste generation is managed in the most cost-effective manner.
Shielding Design Analysis:
DWJC can perform radiation shielding analyses for all types of situations. We use a variety of software codes appropriate to the complexity of the project including point-kernal codes and the Monte Carlo n-Particle Transport Code (MCNP) developed at Los Alamos National Laboratory. This code is used for neutron, photon, electron or coupled transport calculations and allows for the analysis of complex source and shielding configurations with multiple dose points. Analyses can be performed to develop or validate shielding designs for packaging and transportation of radioactive materials, storage facility design, Safety Analysis calculations and work planning to keep radiation exposures As Low As Reasonably Achievable.
Irradiated Hardware and Large Component Characterization:
Irradiated components represent a special problem in radwaste disposal. Expendable items can present issues when it comes to radiological characterization. High activities and variability in material compositions often make sampling impractical. We can provide your company with an activated component analysis, ranging from miscellaneous small components to reactor vessels and internals.
Our computer programs SNAP and Winshield, and methods used in this service conform to industry practice. Results obtained from SNAP have been benchmarked with ORIGEN 2.1. Winshield has been benchmarked against Microshield. Activity estimates are made individually for each customer using site-specific parameters and exposure histories – not recycled from prior work. Results and methods are fully disclosed. All work is performed under our independent quality assurance program which follows NQA-1 standards.
Packaging Plans- We will work with you to define shipping options for your material. Individual packaged plans will be prepared to optimize the capacity of the cask and container combination that is available to you. Concentration averaging in accordance with NRC guidelines will be verified using routines available on ISIP (Integrated Shipping and Inventory Program.
Manifest Preparation- Along with the characterization service, DW James Consulting can prepare the manifests for transporting the material. The Manifests will be produced using the Integrated Shipping and Inventory Program (ISIP). Manifests from ISIP have been accepted at Richland, Envirocare, as well as Barnwell, and are in current use.
DWJC can provide training in the following areas: NRC/DOT Compliance Training for Radwaste Transportation, Shipping Software (ISIP), Sampling & Characterization and 10CFR61 Compliance.
DW James Consulting is available to support site staff when needed to review data, perform analyses, perform trending, perform control rod drive support, provide shipping support, provide recommendations or consult on new issues. Our knowledge is at your disposal.