The effect of cycle burnup on the ex-core detector noise at the frequency of the pendular
core barrel vibrations in the Ringhals-3 PWR core was investigated using a neutron noise …

This report gives an account of the work performed by the Department of Reactor Physics in
the frame of a research contract with Ringhals, Vattenfall AB. The contract constitutes Stage …

Core-barrel motion (CBM) surveillance and diagnostics, based on the amplitude of the
peaks of the normalized auto power spectral densities (APSDs) of the ex-core neutron …

Surveillance and diagnostics of core barrel vibrations has been performed in the Swedish
Ringhals PWRs for several years, with main focus on the pendular motion (beam mode) …

This report gives an account of the work performed by the Division of Subatomic and Plasma
Physics (former Division of Nuclear Engineering), Chalmers, in the frame of research …

The possibility of measuring the gas-phase velocity in a two-phase mixture through the use
of neutron noise techniques is demonstrated in the zero-power reactor CROCUS of the …

Determination of the local void fraction in BWRs from in-core neutron noise measurements
requires the knowledge of the axial velocity of the void. The purpose of this paper is to revisit …

This report gives an account of the work performed by the Department of Nuclear
Engineering, Chalmers, in the frame of research collaboration with Ringhals, Vattenfall AB …

After the fuel element is damaged, the delayed neutron precursor flows into the coolant,
which will break the inherent balance of the normal core, thus causing the transient change …

Surveillance of core barrel vibrations has been performed in the Swedish Ringhals PWRs
for several years. This surveillance is focused mainly on the pendular motion of the core …