J. Eigenbrodt, W. Charlton, H.O. Menlove, S.J. Tobin, M. Seya, H.R. Trellue, A.M. Bolind,
"Simulations and Preparation for PNAR Measurements of Fugen Fuel,"
Proceedings of the 35th ESARDA Annual Meeting, 27-30 May, 2013, Bruges, Belgium.
The Next Generation Safeguards Initiative Spent Fuel (NGSI-SF)
Project will be deploying a non-destructive assay (NDA) system to
measure the heavy water moderated, light water cooled Fugen reactor
fuel assemblies. The NDA system combines the following NDA
techniques: (1) Passive Neutron Albedo Reactivity (PNAR), (2) total
neutron, (3) total gamma and (4) three fission chambers based
neutron detectors sensitive to different parts of the neutron
energy spectrum. Before deploying this system to Fugen, a variety
of fresh fuel assembly comprised of differing numbers of low
enriched rods (3.2%, 0.7% 0.3% and 3.2% with Gd) will be measured
at Los Alamos National Laboratory in water-based experiments that
will used a Cf source place inside the assembly to provide a
driving neutron source. The sensitivity of the neutron portion of
the system will be assessed to positioning of the assembly inside
the detector as well as to the removal/replacement of pins.
Furthermore the variation in the relative intensity of the neutron
flux in the thermal, epithermal and fast regions will be
benchmarked. Deployment of this detector system at the Fugen
reactor site is expected in the summer of 2013.
Associated Project(s):PNAR Measurements of Fugen Fuel