Beam dump for 10 kW 10 Mev LINAC

•RRCAT has developed 10 kW 10 MeV LINAC for radiation processing of agricultural products & medical sterilization.•An improved design for the beam dump is presented which is more efficient, economical & compact than the previous design.•Low conductivity water is pumped through the channels to remove most of the heat by forced convection.•The low conductivity water is supplied at high pressures ∼6 bars, making the structure prone to deflections.•The estimated maximum temperature & the maximum stress intensity are within the acceptable limits.

Raja Ramanna Centre for Advanced Technology has developed a 10 kW, 10 MeV linear particle accelerator (LINAC) for the Agricultural Radiation Processing Facility for radiation processing of agricultural products and medical sterilization. This paper presents an improved design for the existing beam dump of this accelerator. The new design is more efficient, safer, economical and compact than the previous design [1]. The new design is investigated both for maximum stress and maximum temperature. The material selection is done keeping in mind the radiation damage, thermal conductivity, corrosion in the ozone environment, mechanical strength and manufacturability. The estimated maximum temperature is 85.8 °C which is less than the boiling point of water at 1 bar pressure (100 °C). The maximum stress intensity is estimated to be 42.60 N/mm2 which is less than the yield strength of the material [2].