The gypsum extracted from the exhaust gases in the flue gas desulphurisation unit is transported by conveyor belts to the wet gypsum storage hall. The stockpile loading is carried out by a reversing conveyor, which is able to, when a desired filling height is reached, traverse forward or back to another discharge position. For safety reasons, there are two redundant radar sensors at the end of the reverse conveyor belt to monitor the stockpile filling height during discharge.