High-dose irradiation (irradiation periods of several hours to several weeks) is carried out in the capsule irradiation facility (KBA). The KBA is a pool water-operated rabbit system with two identical runs and exhibiting a neutron flux of approximately 4x10¹⁴cm^-2s^-1.

The loading and unloading station for the KBA is located in the south wall of the storage pool. Beneath this station is a 40-position sample carousel covered by approx. 3,5m water. All handling processes relating to the KBA (loading and unloading samples, charging the irradiation position, return of samples from the irradiation position) are performed using hydraulic, pool water-operated pumps. In addition, the carousel has over 30 decay positions, in which the covering water is used as a shield.

For irradiation in the KBA, the samples are packaged in aluminium capsules with an internal volume of approx. 30cm³. To ensure adequate cooling of the samples, the aluminium capsules are water-permeable, which means of course that water-sensitive or water-soluble samples may only be irradiated in a hermetically sealed quartz ampoule or aluminium tube. To increase capacity, the facility is designed so that up to five irradiation capsules may be conveyed and thus irradiated simultaneously in each run.