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Handout Radiation and NPP safety February-March 2019.pptx

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  Course on Safety and Risk Management, ICT, MumbaiModule:Radiation and Nuclear Power Plant Safety Lalit Mohan GantayetFebruary-March, 2019 1Radiation and NPP Safety, Safety and Risk Management, L. M. Gantayet, February-March 2019  Process Plants and Radiation Instrumentation: Nucleonic gauges Gamma tomography of columnsNon-Destructive Testing:X  – Ray Radiography for in service inspectionCo-60 and Ir-192Medical Isotope Production:Proton accelerators and Radiochemical processingIrradiation in Nuclear reactors and Radiochemical processing Nuclear Chemical Plants: U-Mining, Ore extraction, Beneficiation, Purification Fuel fabrication of Natural uranium fuelFuel reprocessing plants for separation of Pu, U and FPs Fabrication of Pu bearing fuel Low level Radioactive (RA) Wastewater treatmentHigh level RA Waste-Actinide separation, and immobilisationOther fuel cycle activities 2  Process Plants and Radiation  – contd.Nuclear Power Plant: Spent fuel management  – storage(Process enggaspects)Upgradation of heavy water, T-removal Water chemistry, polishing, dosingCover gas management Cleaning scales / prevention of corrosion Gaseous effluent managementOperation of NPPLevels of emergencies: On-site and Off-site emergenciesRadiation processing:Co-60 and Accelerator irradiation for food preservation, Cross linking of polymers, Electron beam effluent treatment,Water purification, sludge hygienisation, medical sterilisation, adhesives, gelation, etc. etc. 3  Radiation effects Radiation-carrier of kinetic energy of alpha, and beta particles and electromagnetic energy of x-rays and ɣ -rays. Absorption of this energy results in ionizations and excitations of atom or molecule, leading to chemical changes harmful to cells and tissuesIndirect effects (60-70%)Most biological damage is caused by free radicals, the oxidizing species. Stochastic EffectsNormally late occurring effects including genetic.No evidence of radiation induced genetic damage above the natural background has been observed in humans. 4

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Sep 10, 2019
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