|Industrial Accelerators Division
Activities of Industrial Accelerators Division
- Electron Accelerator based Radiation Processing Facility
RRCAT has developed an electron accelerator based demonstration radiation processing facility at Devi Ahilya Bai Holkar Fruit and Vegetable Mandi Complex, Indore. The demonstration facility is based on the indigenously developed 10 MeV, 5 kW electron linear accelerators (linacs).
High energy electron beams from these linacs are useful in a variety of applications like sterilization of medical devices, phytosanitary treatment of agricultural products for meeting the requirements of international trade, development of new crop varieties through mutation breeding, industrial radiography and hygienization applications like reduction of harmful bacteria in municipal waste. Electron beam based radiation processing is an extremely safe alternative to radioisotope based facilities (like cobalt-60). No radioactivity is involved and there is no persistent radiation after the electron accelerator is switched off.
Figure-1 : Electron Accelerator based Demonstration Radiation Processing Facility
Two RRCAT developed 10 MeV, 5 kW electron linacs have been installed at the facility. While one linac is used in the processing, the second serves as standby. The linacs deliver the beam in horizontal direction. Both the linacs have been endurance tested for hundreds of hours at RRCAT prior to installation and are operational at the facility.
- Product handling system
The facility has a roller conveyor based batch mode product handling system with PLC control. The system has appropriate conveyor configuration and control routines to execute “one sided” and “two sided” processing as well as any number of passes can be given from each side to all boxes of the batch. The product handling system can handle boxes of typical dimensions of 60 cm (height) X 40 cm (dimension along travel direction) X 60 cm (dimension along beam penetration direction). Typical weight of product filled box would be about 10 to 20 kg. Depending on product density and box dimensions, ten to thirty boxes can be processed in one batch. Typical cycle time for processing of one batch of medical devices containing ~300 kg of products to a dose of 25 kGy is 100 minutes.
- Processing capacity
Practically tested processing throughput obtained at the facility is 5 kGy.ton/hour. Furthermore, doses in a wide range from very low values of 100 Gy to high values of 25 kGy can be delivered.
- Process control
The linac and product handling system operations are controlled through PC based control system. Process and volumetric dosimetry facilities are available to measure the dose delivered to the products. Dosimetry systems based on EPR dosimetry and radiochromic films are used at different test stages and are available for product dosimetry.
A radiological vault, search and secure system, air handling system, electrical powering system, product storage areas, coolant systems etc are provided for supporting operation of the facility.
Electrical supply from grid and DG set, and water supply are available.
- Demonstration operation
The demonstration of electron beam processing of various products can be undertaken. If you are interested in having a demonstration of electron beam processing of your products, please contact Sh Jishnu Dwivedi.