Improving Materials Accountancy for Reprocessing using HiRX Ben Cipit a , Michael McDaniel a , George Havrilla b , Michael Collins c a Sandia Natonal Laboratories, b Los Alamos Natonal Laboratory, c Korinzu Scientfjc Objectjve: Determine the safeguards improvement if the High Resoluton X-Ray (HiRX) technology replaces HKED for routne accountancy measurements in reprocessing. DCC Source Optc DCC Collecton Optc PuL α RhK α X-ray Tube Sample Methods: The Separaton and Safeguards Performance Model (SSPM) Detector was used to examine the safeguards improvement if a 0.1-0.2% measurement uncertainty could be obtained. Economics: An economic analysis examined the costs of HiRX as Reductjon in σ MUF from Baseline compared to HKED--lower costs are expected due to the simplicity of 0.2% Measurement on Accountability Tanks operaton. 40% Reductjon HiRX Cost Compared to Notes 0.1% Measurement on Accountability Tanks and Random HKED 60% Reductjon Sampling Equipment lower HiRX cost could be 1/3 of HKED due to smaller x-ray source, no moving parts, less shielding Labor lower Potentally quicker measurement tme, less training requirements Results: The modeling showed a 2-3 fold improvement in the overall safeguards performance of a plant if a 0.1-0.2% measurement Utlity much lower Less electricity, no water cooling, no cryogenic cooling Waste much lower Smaller sample chips, much less sample volume, less equipment/repair uncertainty can be achieved. waste Facility same Similar sample transportaton, similar overhead costs Shielding much lower Much smaller sample volume may allow measurements in a glove box Conclusion: HiRX has the potental to provide an improvement to instead of a hot cell, much less shielding for personnel required overall safeguards performance with lower cost if a low measurement Repair same Similar repair costs uncertainty can be demonstrated. SAND2014-17669PE
PUREX Separatjon and Safeguards Performance Model (SSPM) Ben Cipit, Sandia Natonal Laboratories, bbcipit@sandia.gov The Matlab Simulink environment is used to Spent fuel library with a range of model material fmows and measurements Mass tracking of elements inital enrichment, burnup, and 1-99, bulk solid & liquid, used in reprocessing. cooling tmes heat load, and actvity Automated calculaton of Material Customizable Unaccounted For measurement (MUF) and σ MUF in blocks with user- real-tme defjned errors Alarm conditons for material loss determined using User-defjned Page’s test on SITMUF diversion scenario Integraton with analyses process monitoring measurements Page’s test results for a notonal Bulk process monitoring The Separatjon and Safeguards Performance diversion scenario balance (in liters) for one Model (SSPM) was used to examine the tank safeguards improvement if a 0.1-0.2% measurement uncertainty can be obtained using HiRX.
HiRX Modeling Results Ben Cipit, Sandia Natonal Laboratories, bbcipit@sandia.gov Model Results: • The use of HiRX (with 0.2% measurement uncertainty) at the Input Accountability Tank only led to a 30% reducton in σ MUF from the baseline. • The use of HiRX (with 0.2% measurement uncertainty) at the Input and Output Accountability Tanks led to a 40% reducton in σ MUF from the baseline. • The use of HiRX (with 0.1% measurement uncertainty) for Input and Output Accountability and all internal random sampling led to a 60% reducton in σ MUF compared to the baseline. Pu Concentratjon Measurement Assumptjons HiRX Case 2 IAT & HiRX Case 3 Best HiRX Case 1 IAT Baseline OAT Case The use of HiRX could potentjally lead to a only Locatjon RE SE RE SE RE SE RE SE two or three-fold improvement in the Accountancy Tank (HKED) 0.8% 0.5% 0.2% 0.2% 0.2% 0.2% 0.1% 0.1% PUREX Feed Tank (Sampling-IDMS) 0.2% 0.2% 0.2% 0.2% 0.2% 0.2% 0.1% 0.1% safeguards performance of the separatjons PUREX Separatjon (Calculatjon) 3% 3% 3% 3% 3% 3% 3% 3% U Decontaminatjon (Calculatjon) 3% 3% 3% 3% 3% 3% 3% 3% area of the plant. U Evaporator (Sampling-IDMS) 0.2% 0.2% 0.2% 0.2% 0.2% 0.2% 0.1% 0.1% U Bufger Tank (Sampling-IDMS) 0.2% 0.2% 0.2% 0.2% 0.2% 0.2% 0.1% 0.1% U Product Tank (HKED) 2% 2% 2% 2% 2% 2% 0.1% 0.1% The modeling depends on the ability to 7% 7% 7% 7% 7% 7% 7% 7% Recycle Mixer-Setuler (Calculatjon) Pu Sep. Bufger Tank (Sampling-IDMS) 0.2% 0.2% 0.2% 0.2% 0.2% 0.2% 0.1% 0.1% achieve a 0.1-0.2% measurement Pu Decontaminatjon (Calculatjon) 3% 3% 3% 3% 3% 3% 3% 3% Pu Bufger Tank (Sampling-IDMS) 0.2% 0.2% 0.2% 0.2% 0.2% 0.2% 0.1% 0.1% uncertainty, which has not been Pu Product Tank (KED) 0.3% 0.3% 0.3% 0.3% 0.2% 0.2% 0.1% 0.1% HALW Tank 7% 7% 7% 7% 7% 7% 7% 7% demonstrated yet. HALW Concentrator 7% 7% 7% 7% 7% 7% 7% 7%
HiRX Measurement Technology Ben Cipit a , Michael McDaniel a , George Havrilla b , Michael Collins c a Sandia Natonal Laboratories, b Los Alamos Natonal Laboratory, c Korinzu Scientfjc DCC Source Optc DCC Collecton Optc PuL α RhK α Sample Detector X-ray Tube HiRX uses a low energy x-ray tube A second doubly curved crystal optjc is with doubly curved crystal optjcs to used to collect and focus emitued x- HiRX Prototype create a monochromatjc x-ray source rays of a specifjc energy (unique to the for excitjng x-ray fmuorescence in a element of interest) onto a detector. sample. Experiments at Los Alamos Natjonal Laboratory have consistently atuained betuer than 10 ppm detectjon limits with small sample sizes (100 µ L or less). It is expected that HiRX can improve both the input and output accountability measurement for Pu in reprocessing solutjons with an error of 0.1% and with rapid turn-around The result is a spectrum that exhibits a prominent tjme, but this uncertainty has not been achieved yet. x-ray peak specifjc to one element with negligible background.
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