TY - JOUR
T1 - Characterization of self-damaged (U,Pu)N fuel used in the NIMPHE program
AU - Carvajal-Nunez, Ursula
AU - Prieur, Damien
AU - Janssen, Arne
AU - Wiss, Thierry
AU - Cambriani, Andrea
AU - Vermorel, Emmanuel
AU - Scheinost, Andreas
AU - Somers, Joseph
PY - 2013
Y1 - 2013
N2 - During in-pile, irradiation-induced damage occurs in nuclear fuel and results in a deterioration of its properties, which can affect the margin to melt of the fuel. Damage also occurs in fresh fuel through the self-irradiation process, and thus provides a convenient means to investigate changes in the material. A uranium-plutonium mixed nitride fuel made over 25 years ago, and stored in the ITU archives has been retrieved. Coupling EXAFS and TEM has shown that this material was still well-crystallized. However, an increase of 0.3% of the lattice parameter was found. As shown by the EXAFS, the U-N and Pu-N as well as the metal-metal distances are similarly affected. However, no significant modification of both anion and cation sublattice was found. Although no defect clustering was found by EXAFS, the presence of nanometric helium bubbles was demonstrated by TEM as well as nanometric disordered domains. © 2013 Elsevier B.V. All rights reserved.
AB - During in-pile, irradiation-induced damage occurs in nuclear fuel and results in a deterioration of its properties, which can affect the margin to melt of the fuel. Damage also occurs in fresh fuel through the self-irradiation process, and thus provides a convenient means to investigate changes in the material. A uranium-plutonium mixed nitride fuel made over 25 years ago, and stored in the ITU archives has been retrieved. Coupling EXAFS and TEM has shown that this material was still well-crystallized. However, an increase of 0.3% of the lattice parameter was found. As shown by the EXAFS, the U-N and Pu-N as well as the metal-metal distances are similarly affected. However, no significant modification of both anion and cation sublattice was found. Although no defect clustering was found by EXAFS, the presence of nanometric helium bubbles was demonstrated by TEM as well as nanometric disordered domains. © 2013 Elsevier B.V. All rights reserved.
M3 - Article
SN - 0022-3115
VL - 443
SP - 491
EP - 496
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
IS - 1-3
ER -