NUCLEAR WASTE

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Picture Courtesy: https://sitn.hms.harvard.edu/flash/2018/looking-trash-can-nuclear-waste-management-united-states/

Context: Nuclear waste management is a critical component of nuclear power generation, and countries like India, which have ambitious nuclear energy programmes, must efficiently address this challenge.

Details

• Nuclear waste, also known as radioactive waste, is a byproduct of nuclear reactors, fuel processing plants, and institutions such as hospitals and research facilities.
• Nuclear waste is mostly composed of wasted fuel from nuclear reactors. This used fuel contains highly radioactive fission products and transuranic elements generated during the fission process.
• The management of nuclear waste is a critical issue due to its potentially harmful effects on the environment and human health.

Environmental and Health Impacts

• Radiation Exposure: Radioactive emissions from nuclear waste can cause radiation exposure, leading to various health effects, including cancer, genetic mutations, and organ damage.
• Contamination: Nuclear waste can contaminate soil, water, and food chains, affecting ecosystems and wildlife. Contaminated areas may require remediation and long-term monitoring.
• Long-Term Risks: Some radioactive isotopes have long half-lives, remaining hazardous for thousands to millions of years. Long-term management and containment are necessary to prevent future risks.

Handling and Management of Nuclear Waste

• Spent Fuel Management: Spent fuel is initially stored in underwater pools at nuclear plants to dissipate heat and radiation. After cooling, it can be transferred to dry cask storage or reprocessed for recycling.
• Reprocessing: Involves chemically separating usable fissile material (e.g., plutonium, uranium) from spent fuel for reuse in reactors. Reprocessing also produces additional waste streams.
• Treatment and Conditioning: Liquid waste from reprocessing is treated to remove radioactive contaminants. Solid waste may be compacted, solidified, or encapsulated in containers for safe storage and disposal.
• Storage: Nuclear waste requires secure storage facilities to prevent leaks, contamination, and unauthorised access. Storage methods include on-site storage, interim storage facilities, and long-term repositories.
• Disposal: Final disposal involves placing nuclear waste in deep geological repositories, where it is isolated from the environment for thousands of years. Geological disposal aims to minimise the risk of human exposure and environmental contamination.

Challenges and Concerns

• Technical Challenges: Managing radioactive waste involves technical issues such as containment, storage, transportation, and long-term monitoring.
• Safety and Security: Nuclear waste facilities have to comply with strict safety and security regulations to avoid accidents, leaks, and unauthorised access.
• Environmental Impact: Improper disposal or management of nuclear waste can contaminate land, water, and air, endangering ecosystems and human health.
• Public Perception: Nuclear waste disposal is frequently met with public opposition due to safety, environmental damage, and ethical issues.
• Cost and Liability: Nuclear waste handling is expensive and can place a financial burden on governments, utilities, and taxpayers. Liability concerns for long-term management and disposal also arise.

Way Forward

• Nuclear waste management is a complex and multifaceted challenge that requires careful planning, technical expertise, regulatory oversight, and public engagement. Effective management strategies aim to minimise environmental impact, protect public health, and ensure the safe and secure disposal of radioactive waste for present and future generations.

Must Read Articles:

NUCLEAR POWER IN INDIA: https://www.iasgyan.in/daily-current-affairs/nuclear-power-in-india#:~:text=Nuclear%20waste%20is%20a%20major,disposed%20of%20through%20safe%20storage.

NUCLEAR WASTEWATER: https://www.iasgyan.in/daily-current-affairs/nuclear-wastewater

PRACTICE QUESTION Q. Evaluate the potential risks and environmental impacts of nuclear accidents, such as core meltdowns or radioactive leaks, and analyse the effectiveness of current safety measures in mitigating these risks.