Metal Scrap And Steel
India imports approximate 6 million tonnes of metal scrap for manufacturing of various ferrous and non ferrous products. The sourcing company of metal scrap may be unaware of potential hazard which an unwarranted radioactive source may cause if melt and recycled in their factory.
There had being incident in India where exported consignment was send back due to radioactive contamination. This had big impact on Indian companies which were exporting steel.
In the light of these incident government had decided to monitor all the incoming scarp material in India through 14 designated sea ports. These ports have installed sophisticated radiation portal monitors which can check and identify incoming container.AERB had also issued guidelines that all the facility where metal scrap is used must have two set of instruments:
1) Radiation Survey Meter
2) Radionuclide Identifier
As per DGFT notification importer should now also get pre-shipment inspection certificate from an approved agency. This agency will carry out radiation survey of the export consignment with a handheld device and give certificate if the shipment is free from any kind of radioactive contamination.
There is probability , if proper check is not performed, that final finished product may get contaminated with radioactive product. This may cause huge economic impact on company.
As per European Metrology Research Programme " Ionising Radiation Metrology for the Metallurgical Industry" following is the observation:
"Current radio assay controls, used in foundries, do not provide the appropriate level of traceability for measurements of radioactivity in cast products. To address this, radiation detection equipment is needed throughout the lifecycle of steel products, i.e. from the recycled scrap loads to the certification of the final steel cast products. This intermediate testing includes the testing of steel by-products such as slags and fume dusts and several ‘intermediate’ gamma detection systems are currently in use. However these commercially available gamma detection systems vary in their technical approach, which results in differences in their geometry, energy resolution and the sensitivity levels of their measurements. They also do not have enough specific reference materials or calibration standards to ensure the SI traceability of their measurements."
This report is attached for further review.
If you are an Importer or manufacturer our advise is to check :
1. Name and Make of Radiation Survey Meter.
2. Check the Calibration Certificate of the RSM.
3. Insist on hand held radioisotope identifier which can identify potential radioactive source,
4. Insist on devices which are based on HPGe detector or LaBr Detector.
We at T2T will assist you at every stage if we are hired as adviser to your company.