Separations and safeguards model integration.

Abstract

Research and development of advanced reprocessing plant designs can greatly benefit from the development of a reprocessing plant model capable of transient solvent extraction chemistry. This type of model can be used to optimize the operations of a plant as well as the designs for safeguards, security, and safety. Previous work has integrated a transient solvent extraction simulation module, based on the Solvent Extraction Process Having Interaction Solutes (SEPHIS) code developed at Oak Ridge National Laboratory, with the Separations and Safeguards Performance Model (SSPM) developed at Sandia National Laboratory, as a first step toward creating a more versatile design and evaluation tool. The goal of this work was to strengthen the integration by linking more variables between the two codes. The results from this integrated model show expected operational performance through plant transients. Additionally, ORIGEN source term files were integrated into the SSPM to provide concentrations, radioactivity, neutron emission rate, and thermal power data for various spent fuels. This data was used to generate measurement blocks that can determine the radioactivity, neutron emission rate, or thermal power of any stream or vessel in the plant model. This work examined how the code could be expanded to integrate other separation steps and benchmark the results to other data. Recommendations for future work will be presented.4

A Game Theoretic Approach to Nuclear Safeguards Selection and Optimization

“…The Separation and Safeguards Performance Model (SSPM) is a Simulink-based dynamic process model of a hypothetical aqueous reprocessing facility [15]. Like Dayem's model, the SSPM uses a set of coupled differential equations to describe the flow of SNM and material through the facility and stochastically simulates mass and volume measurements of that material at key points, at which inventory differences are calculated.…”

Processing large sensor data sets for safeguards : the knowledge generation system.

“…Since actual sensor data from a reprocessing plant was not available, the data used in the demonstration was provided by the Separations and Safeguards Performance Model (Cipiti 2010).…”

Fully integrated safeguards and security for reprocessing plant monitoring.

“…The Separations and Safeguards Performance Model (SSPM) [3] is a transient model of a UREX+ reprocessing plant. A PUREX version has also been developed, and either of these models can be easily modified to include additional extraction steps.…”

“…The SSPM is constructed in Matlab Simulink and tracks cold chemicals, bulk fluid flow, solids, and mass flow rates of elements 1-99 on the periodic table. In addition, the radioactivity, thermal power, and neutron emission rates can be determined for any stream or vessel in the plant [4]. Considerable detail has been added to the model to adequately model tank filling and emptying, plant transients, and separation chemistry [5].…”

“…The Separations and Safeguards Performance Model (SSPM) has been developed over the past several years to meet this modeling and simulation need [1,2,3]. The goal was to create a plantlevel model of reprocessing for testing newly-developed measurement instrumentation, unique data correlation strategies, the integration of differing types of plant data, and the evaluation of diversion scenarios-all for the purpose of designing the architecture for an advanced, integrated plant monitoring system.…”