NuFuel & MMSNF 2015

First Workshop on Research into Nuclear Fuel in Europe
and Materials Modeling and Simulation for Nuclear Fuels Workshop
Karlsruhe, Germany, November 16th to 18th, 2015

Updated: Tue 08 Dec 2015, 14:27

Poster 2.2: TRABANT: Studies on a high power MOX irradiation

Sander van Til1, A.V. Fedorov1, P.R. Hania1, R. Moss2 , D. Staicu3, J. Somers3, N. Chauvin4
  • 1: NRG, Netherlands
  • 2: JRC-IET
  • 3: JRC-ITU
  • 4: CEA, DEN

Abstract

Between 2001 and 2005, several fast reactor MOX fuel pins were irradiated in the HFR Petten in the TRABANT programme. The PIE on one of these pins is currently being performed at NRG’s Hot Cell Laboratories within theFP7 project ESNII+.

The pins ( Phénix-cladding (15–15Ti SS) contain high content Pu annular MOX pellets that were originally produced in the CAPRA programme. The pins are submersed in a sodium-filled capsule and produce a linear power of 460–520 W/cm in the HFR. These powers correlate to the fast flux linear power in an SFR, which is achieved by placing the pins in a Cd-shielded rig that absorbs thermal neutrons. The designed central fuel temperature and cladding temperature were 2100ºC and 600ºC, respectively. The irradiation was stopped after three irradiation cycles after observations of unexpectedy high powers and an apparent mobility of the central hole in the pellets in neutron radiographs.

In this contribution the fuel characteristics, the irradiation history and the causes that lead to the unexpected behaviour are presented. Both non-destructive testing (gamma scanning, profilometry and fission gas release), as well as ceramography and element analysis (EDS,WDS) on different regions of interest will be reported.