Personnel protection in a high average power electron beam scrubber installation

A future electron beam scrubbing facility in a large power plant may need about 10 T J energy in 800 ke V electrons per year, of which a small but non-negligible part ends up as ionizing radiation. Protection of personnel from radiation must therefore be carefully considered. The present work predicts the radiation from a future electron beam scrubbing facility in areas occupied by or accessible to personnel. In the present design the estimated dose can be up to 360 Gy a year (at 6000 hours of operation per year). Including the occupancy factor the personnel dose is 7.5 Gy per year, while the maximum allowed dose is down to 0.005 Gy per year.¹ Therefore, additional radiation shielding or other measures are essential, especially at the flue gas entrance to and exit from the blockhouse.