Window spallation target

The most straightforward and simple configuration is the one where the reactor primary coolant is at the same time the spallation target: the so-called “window spallation target” configuration.

The beam tube and beam window separate the accelerator beam line vacuum from the target material. The window is positioned at the centre of the sub-critical core almost at half core height and is cooled by the upward flowing primary coolant under forced convection by the primary pumps.

Since the beam window is the most heavily loaded structural part, it must be easily replaceable and the possibility of window rupture and its consequences should always be taken into account.

Window spallation target