FIPD: EBR-II Fuels Irradiation & Physics Database – FY19 Updates

Abstract

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Fuel Performance Analysis of Fast Flux Test Facility MFF-3 and -5 Fuel Pins Using BISON with Post Irradiation Examination Data

“…The number of fission gas atoms produced and released has been consistent with previous work within EBR-II modeling [2]. The fission gas bubble radius used for the fuel eigenstrain is based on the total number of fissions and the number density of bubbles, as seen in Equation (1).…”

“…The power and flux histories for MFF pins were constructed using assembly-averaged flux and power, with power and flux fractions applied to individual pins at the beginning and end of each operating cycle listed in EFPD. EBR-II pins supply an LHGR and fluence for each pin at the beginning of the operating cycle but contain an EBR-II power history; the combination of these two allows for a complete power and flux history to be written for individual pins, including reactor startups and shutdowns between experiments and operating cycles [1][2][3]. This was not possible for MFF pins because reactor power history was not available.…”

“…A part of this means eventual qualification of a final fuel design. The Fuels Irradiation and Physics Database (FIPD) is under development by Argonne National Laboratory to be used for validating fuel performance models, and has been linked to a BISON-based model for such purposes [1,2]. The measurements are most applicable to typical sodium-cooled fast reactors, and several demonstrations have been performed to illustrate use of such a model with the database [1][2][3].…”

“…Axial power and flux profiles for each power cycle were included in the simulations as well, where previous modeling left the axial profiles fixed throughout the irradiation histories. The BISON FFTF MFF simulations were compared to digitized PIE data for burnup, fuel axial swelling, and cladding profilometry [1,2]. In addition, fission gas measurements were predicted for FFTF MFF-3 and MFF-5 pins.…”

Fast Reactor Database Utilization for Qualification of Metallic Fuel Forms

“…Since its The database development is an ongoing effort since 2011 [1][2][3][4][5], and continues to the present (FY23). The recent improvements to the database structure, interface, content, and associated qualification effort of its data content are described in the subsequent sections.…”