|Industrial Accelerators Division
Activities of Industrial Accelerators Division
- Electron Beam Processing Facility
RRCAT is developing an electron beam processing demonstration facility in Devi Ahilya Bai Holkar Fruit and Vegetable Mandi Complex at Indore. The demonstration facility is based on the indigenously developed 10 MeV, 5 kW electron linear accelerators (linacs).
Electron beams of high energy are useful in a variety of applications like sterilization of medical products, phytosanitary treatment of agricultural products for meeting the requirements of international trade, development of new crop varieties through mutation breeding, and hygienization application like reduction of harmful bacteria in municipal waste. Moreover, the electron beam based processing is an extremely safe alternative to radioisotopes like cobalt-60 (Co60). No radioactivity is involved and there is no persistent radiation after the electron accelerator is switched off.
Figure- 1 Electron Beam Processing Demonstration Facility
Two 10 MeV electron linacs have been installed at the electron beam processing demonstration facility. The second linac will serve 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, the first linac at the beam power of 5 kW and the second linac at the beam power of 6 kW. The first linac is in operational state at the facility and the second linac is under final stage of assembly.
- Product handling system
The facility has a roller conveyor based batch mode product handling system. The product handling 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.
- Processing capacity
A practically tested processing throughput of 5 kGy. ton/hour can be obtained in electron beam processing. Doses in a wide range can be delivered. Depending on the product processing requirements dose from very low values of 100 Gy to high values of 25 kGy can be delivered. The product handling system can transport boxes of different products 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, 10 to 30 boxes can be processed in one batch. The cycle time for processing of a batch of medical product containing ~300 kg. of material at 25 kGy dose is nearly 100 minutes.
- Process control
The linac and product handling system operations are controlled through PC based control systems and are highly repeatable. Process and volumetric dosimetry facilities are available to measure the dose delivered to the products. Dosimetry systems based on Electron Paramagnetic Resonance (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 connection from 11 kV line, 300 kVA DG set and water supply are provided at the facility.
- 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 please contact Sh Jishnu Dwivedi.