Since November 2020 the Nancay Radioheliograph resumed scientific observations, after five years of technical work. The NRH and the ORFEES spectrograph are providing observations relevant to particle acceleration in support of the SolarOrbiter and other space missions. We give a brief status report on the instrument and illustrate this research with studies of the origin of relativistic solar particle events and the trappig and escape of non-thermal electrons from an erupting flux rope during a coronal mass ejection. The unique contribution of radio spectral imaging is the tracking of elementary acceleration processes and of the magnetic structures that guide energetic particles from eruptive active regions at the Sun to remote places in the solar atmosphere and the Heliosphere. Earth-bound radio observations are therefore an essential element in the chain between X and gamma-ray observations of non-thermal to relativistic particles at the Sun and the detection in situ.