TY - JOUR
T1 - EPMA-based mass balance method for quantitative fission product distribution comparison between TRISO particles
AU - Wright, Karen E.
AU - Stempien, John D.
AU - van Rooyen, Isabella J.
N1 - Accepted Author Manuscript
PY - 2022
Y1 - 2022
N2 - Two irradiated AGR-2 TRISO particles were chosen to demonstrate a recently developed mass balance technique in which EPMA-generated concentration data were used to determine fission product mass on a layer-by-layer basis in TRISO particles. EPMA-calculated fission product masses for most fission products in the two particles were within ± 20% of their ORIGEN-modelled masses. Results show that Sr, Ba, and Eu accumulate preferentially in the carbon-rich kernel periphery on the particles’ side that lacks a gap between the buffer and IPyC. In addition, the more mobile elements—Cs, Sr, Pd, and Ag, accumulate in greater quantity in the outer layers of particle AGR2-223-RS34 compared to particle AGR2-223-RS06, which has relatively more of those elements’ mass located in the kernel and kernel periphery, suggesting enhanced fission product transport in particle AGR2-223-RS34. This model can be used better understand and test fission product transport in TRISO particles. Graphical abstract: [Figure not available: see fulltext.]
AB - Two irradiated AGR-2 TRISO particles were chosen to demonstrate a recently developed mass balance technique in which EPMA-generated concentration data were used to determine fission product mass on a layer-by-layer basis in TRISO particles. EPMA-calculated fission product masses for most fission products in the two particles were within ± 20% of their ORIGEN-modelled masses. Results show that Sr, Ba, and Eu accumulate preferentially in the carbon-rich kernel periphery on the particles’ side that lacks a gap between the buffer and IPyC. In addition, the more mobile elements—Cs, Sr, Pd, and Ag, accumulate in greater quantity in the outer layers of particle AGR2-223-RS34 compared to particle AGR2-223-RS06, which has relatively more of those elements’ mass located in the kernel and kernel periphery, suggesting enhanced fission product transport in particle AGR2-223-RS34. This model can be used better understand and test fission product transport in TRISO particles. Graphical abstract: [Figure not available: see fulltext.]
UR - http://www.scopus.com/inward/record.url?scp=85124163217&partnerID=8YFLogxK
U2 - 10.1557/s43580-021-00166-2
DO - 10.1557/s43580-021-00166-2
M3 - Article
AN - SCOPUS:85124163217
VL - 6
SP - 1020
EP - 1025
JO - MRS Advances
JF - MRS Advances
SN - 2059-8521
IS - 47-48
ER -