Radioactive pollution is the term for the dangerous level of radiation emitted by radioactive elements. Radiation exposure from all man-made sources contributes 98% of the population's dose and accounts for 20% of the population's overall exposure. More than 3600 million diagnostic radiological treatments are performed each year around the world, along with 37 million nuclear medicine operations and 7.5 million radiation treatments. High levels of radiation can induce chronic disorders, cancer, gene mutation, cell disintegration, or even rapid death in rare circumstances of extreme exposure. This article will explain to you about Radioactive Pollution which will be helpful in preparing the Environment Syllabus for the UPSC Civil Service exam.

What is Radioactivity?

• The spontaneous emission of particles or waves from the unstable nucleus of some elements is known as radioactivity.
• Alpha, Beta, and Gamma are the three types of radioactive particles.
• Positively charged particles are alpha particles. Beta particles are negatively charged electrons, and gamma rays are neutral electromagnetic radiations.
• The earth's crust contains naturally occurring radioactive elements.
• Three NORM (Naturally Occurring Radioactive Materials) series contaminate water resources: uranium, thorium, and actinium.

What is Radiation?

• The energy that originates from a source and moves through space at the speed of light is referred to as radiation.
• This energy has wave-like qualities and is accompanied by an electric field and a magnetic field.
• Background radiation is a type of radiation that all living organisms are constantly exposed to.
• When the level of radioactive radiation exceeds a certain threshold, it causes damage to living organisms.

What is Radiation Dose?

• The dose of radiation is not the same as the dose of medication.
• Ionizing radiation leaves energy behind when it enters an object or the human body.
• A dose is the amount of energy that is absorbed during radiation exposure.
• There are three ways to describe radiation dosage quantities: absorbed, equivalent, and effective.
• The unit of radioactivity is Becquerel (SI unit) or Curie. The Sievert is the unit for the measurement of the quantity of radiation absorbed by the human tissues.

Types of Radiation

Non-ionizing Radiation

• Non-ionizing radiation is a type of lower energy radiation that cannot detach electrons from atoms or molecules, whether they are part of matter or living things.
• Visible, infrared, and ultraviolet light, microwaves, radio waves, and radiofrequency energy from cell phones are all examples of non-ionizing radiation.
• They have a limited ability to penetrate and have an impact on the chemicals and cells that they absorb.
• The majority of non-ionizing radiation types, though, have not been found to be carcinogenic.

Ionizing Radiation

• Ionizing radiation is a type of radiation that has enough energy to separate electrons from atoms or molecules, which results in atomic-level alterations when it interacts with anything, including living things.
• The word "ionizing" radiation refers to changes that typically result in the formation of ions (atoms or molecules that are electrically charged).
• Example: X-rays, cosmic rays, and atomic radiations are some of them (radiations emitted by radioactive elements).
• Ionizing radiation has a strong ability to penetrate matter and can shatter large molecules.
• Long-range (delayed) or short-range (immediate) impacts may result from the molecular damage.

*For detailed notes on this topic, check this link Types of Radiation

Types of Radioactive Particles

Alpha (α) Particles

• Two protons and two neutrons from the atom's nucleus combine to form the positively charged alpha particles (α).
• The most toxic radioactive materials, such as uranium, radium, and polonium, decay to produce alpha particles.
• Although alpha particles are extremely powerful, their heaviness prevents them from traveling very far from the atom since they spend their energy over short distances.
• Depending on how a person is exposed, alpha particle exposure can have a significant impact on their health.
• Exposure to the outside of the body is not a serious problem because alpha particles lack the ability to penetrate even the outer layer of skin. However, they can cause a lot of damage inside the body.
• Alpha particles can harm delicate living tissue if they are ingested, breathed, or enter the body through a cut.
• These big, heavy particles are more hazardous than other radiation because of the way they affect things.
• They can release all of their energy in a few cells because of the close proximity of the ionizations they create. Cells and DNA suffer more serious harm as a result.

Beta (β) Particles

• When an atom undergoes radioactive decay, beta particles (β), which are tiny, rapidly moving particles with a negative electrical charge, are released.
• These particles are released by some unstable elements, including strontium-90, carbon-14, and hydrogen-3 (tritium).
• Because the ionizations that beta particles produce are more widely spaced, they penetrate more deeply than alpha particles but cause less damage to DNA and live tissue.
• Although they move through the air more slowly than alpha particles, they can still be blocked by a layer of clothes or a thin covering of an element like aluminum.
• Some beta particles have the potential to penetrate the skin and harm, including skin burns.
• Beta-emitters are most dangerous when they are eaten or breathed, similar to how alpha-emitters are.

Gamma (γ) Rays

• Photons are the name for the energy units that make up beta particles and gamma rays.
• Gamma rays are pure energy as opposed to alpha and beta particles, which have both energy and mass.
• Although far higher in energy than visible light, gamma rays are identical to that substance.
• During radioactive decay, gamma rays are frequently released alongside alpha or beta particles.
• Gamma rays are a radiation threat to the entire body.
• They can quickly pass through defenses like skin and clothing that can stop alpha and beta particles.
• Gamma rays have such a strong penetrating force that stopping them may require several inches of dense material, like lead, or even a few feet of concrete.
• The human body can be totally penetrated by gamma rays, which can then generate ionizations that harm DNA and tissue.

What does Radioactive Waste mean?

• Any material that is naturally radioactive or has been polluted by radioactivity and is assessed to have no further utility is considered radioactive waste that causes radioactive pollution.
• Nuclear reactors, fuel processing plants, hospitals, and research centers all produce radioactive (or nuclear) waste.
• The decommissioning and dismantling of nuclear reactors and other nuclear facilities also produce radioactive waste.
• There are two types of waste: high-level and low-level waste.
• Exposure to radioactive waste at levels higher than natural background can be dangerous to one's health.
• Exposure to high-level radioactive waste can cause cancer, birth deformities, and other problems.

Sources of Radioactive Pollution

Natural Sources of Radioactive Pollution

1. Exposure to Cosmic Radiation

• Cosmic radiation is constantly bombarding the earth's outer atmosphere.
• Cosmic radiation is made up of fast-moving particles that exist in space and can come from a variety of places, including the sun and other celestial occurrences.
• Protons make up the majority of cosmic rays, although they can also be other particles or wave energy.

2. Terrestrial Radiation

• Terrestrial radiation is produced by the Earth itself. Natural radioactive materials can be found in soil and rock.
• Natural reserves of uranium, potassium, and thorium, which produce modest amounts of ionizing radiation during natural decay, are the principal sources.
• Uranium and thorium are "ubiquitous," which means they can be found almost wherever.

3. Radiation through Inhalation

• Inhalation of radioactive gases created by radioactive materials found in soil and bedrock accounts for the majority of variations in natural radiation exposure.
• The decay of uranium-238 produces radon, an odorless and colorless radioactive gas. It is an inert gas, which means it does not react with the matter around it.
• Radon can easily migrate up through the ground and into the sky since it does not react.
• Thoron is a thorium-derived radioactive gas.
• The amount of radon and thoron in the air varies greatly depending on the soil and bedrock makeup.

Man-Made (Anthropogenic) Sources of Radioactive Pollution

1. Nuclear Power Plants

• The nuclear fusion process in nuclear power plants is the prime culprit for the generation of radioactive waste.
• These processes generate radioactive wastes such as uranium mill tailings, spent (used) reactor fuel and other radioactive wastes which are a serious environmental hazard associated with nuclear power plants.
• For thousands of years, these elements can stay radioactive and are harmful to human health.

2. Nuclear Waste Handling and Disposal

• Nuclear waste handling and disposal can produce low to medium levels of radioactivity over time.
• The radioactivity has the potential to pollute and spread through the air, water, and soil.
• As a result, their impacts may be difficult to discern and anticipate. Furthermore, certain nuclear waste sites may go undetected.
• The primary problem with radioactive waste is that it cannot be decomposed chemically or handled biologically.

3. Nuclear Weapons

• Nuclear weapons testing began with the advent of the atomic era, resulting in the radioactive pollution of a vast number of locations around the world.
• According to statistics from the Stockholm International Peace Research Institute platform, between 1945 and 2006, 2053 nuclear tests were conducted globally.
• This was one of the major sources of radioactive pollution.

*For detailed notes on this topic, check this link Sources of Radioactive Pollution

Effects of Radioactive Pollution

Genetic Mutations

• When it comes to genes and genetics, radiation has negative consequences.
• It causes DNA strand damage, which leads to genetic disintegration over time.
• The degree of genetic mutation leading to changes in DNA composition varies depending on the amount and type of radiation one has been exposed to.
• If a person or animal is exposed to too much radiation through the atmosphere, food, or even water, their bodies are likely to have already absorbed the radiation.
• Because energy cannot be eliminated, it remains active once within the body.
• As a result of the mutation, one is extremely vulnerable to cancer.

Diseases

• Our health is severely harmed by radioactive pollution. Acute radiation syndrome is a rare condition that is one of the most deadly side effects of radioactive pollution.
• It is, however, a result of high-level radioactive radiation. Within a few hours, this condition causes nausea and vomiting.
• If the situation is extremely bad, the person may die in a matter of days or weeks.
• Radiation can also cause cancer, which is by far the most common side effect.

Soil Infertility

• Radiation is prevalent in soils due to its exposure to the atmosphere.
• Radioactive compounds in the soil react with various nutrients, causing the nutrients to be destroyed and the soil to become infertile and very poisonous.
• Such soil results in the harvest of crops that are contaminated with radiation and consequently unsafe for human and animal consumption.

Impact on Marine Life

• For decades, power plants have been releasing radioisotopes into the water as a source of nuclear energy and chemical processing.
• They include Cesium, Radon, Crypton, Ruthenium, Zinc, and Copper, to name a few.
• The fact that the waste is emitted at a "permissible" level does not imply that it is safe.
• These radionuclides can be found in the fishes' soft tissues as well as their bones.
• The radioisotope of ruthenium was believed to be present in the seaweed used in bread.
• The shells and tissues of all shelled fishes are polluted with radionuclides.

*For detailed notes on this topic, check this link Effects of Radioactive Pollution

Measures to Control Radioactive Pollution

Proper Method of Disposing of Radioactive Waste

• Radiation can still be found in radioactive waste. As a result, it cannot be disposed of in the same manner as for regular waste.
• It cannot be buried or incinerated. Because seepage is a possibility, this waste should be stored in large, thick concrete containers.
• Since storage may not be practicable, another alternative is to dilute the radiation.

Proper Labeling

• Any material containing radioactive material must be labeled, with the required precautions stated on the label's content.
• The reason for this is that even light contact with radioactive material can allow radiation to enter the body.
• Containers containing such materials should be clearly labeled to encourage the use of protective equipment when handling them.

Prohibition of Nuclear Tests

• It has already been established that nuclear power possesses a great deal of latent destructive force.
• Nonetheless, the tests conducted to perfect the energy play a significant role in the overall presence of radioactive materials.
• Furthermore, although being conducted in the deserts, these tests wind up leaking into other ecosystems, impacting the livelihoods of many people.

Alternative Energy Sources

• Initially, the development and usage of nuclear power were not dreadful things.
• However, given the harm and threats it poses to the environment, it is past time for its use to be phased out in favor of alternative and ecologically friendly energy sources, such as renewable energy sources (solar, hydroelectric, and wind power).
• When radioactivity is used to generate energy in nuclear power plants, for example, the waste emitted from the various processes and combustion results in more radiation being discharged into the atmosphere.

*For detailed notes on this topic, check this link Measures to Control Radioactive Pollution

Regulatory Measures

• The Department of Atomic Energy (DAE), which was founded in 1954, is the executive agency for all nuclear energy-related activities.
• Nuclear installation locations are selected with safety considerations in mind.
• A number of structural barriers are planned to prevent any serious radiation leakage from the reactor.
• Every month, the radiation exposure of employees is assessed.
• The exposure limit for personnel has been set at 30 millisieverts (mSv) by the Atomic Energy Regulatory Board (AERB).
• This conforms to the International Commission on Radiological Protection's (ICRP) level (ICRP).
• The Atomic Energy Regulatory Board, an independent arm of the Atomic Energy Commission, executes all safety and regulatory duties mandated by the Atomic Energy Act of 1962, which applies to all Department of Atomic Energy institutions.
• Additionally, it has the authority to make decisions about the location, planning, execution, and maintenance of all nuclear installations.

Conclusion

It is important to control radioactive pollution both at the individual level and at the government level. Using radiation exposure protection, proper labels, and appropriate storage and disposal are a few among them. All locations that utilize potentially hazardous levels of radioactive material urgently require increased security measures. The best preventive approach to dealing with this kind of pollution may be to speed the development of low-cost alternatives for radioactive materials in a wide range of applications through research programs and incentives.

FAQs

MCQs

1. Which of the following is a natural source of radioactive pollution?

A) Nuclear power plant emissions
B) Medical X-rays
C) Radon gas emission
D) Industrial waste

2. What health condition is commonly associated with prolonged exposure to ionizing radiation?

A) Diabetes
B) Asthma
C) Leukemia
D) Arthritis

3. Which international agency is responsible for promoting the peaceful use of nuclear energy and preventing its use for military purposes?

A) World Health Organization (WHO)
B) International Atomic Energy Agency (IAEA)
C) United Nations Environment Programme (UNEP)
D) Nuclear Regulatory Commission (NRC)

4. Which of the following is a measure to control radioactive pollution?

A) Increasing fossil fuel usage
B) Implementing strict waste disposal regulations
C) Reducing renewable energy adoption
D) Promoting deforestation

5. Which disaster is considered one of the worst nuclear accidents in history, leading to significant radioactive pollution?

A) Three Mile Island accident
B) Fukushima Daiichi disaster
C) Chernobyl disaster
D) Windscale fire

GS Mains Questions and Model Answers

Q1: Analyze the impact of radioactive pollution on the environment and human health. Provide examples to support your answer.

Answer: Radioactive pollution has severe and long-lasting effects on both the environment and human health. Radioactive contaminants can accumulate in the environment, leading to soil and water contamination and affecting plant and animal life. High levels of radiation exposure can cause genetic mutations, reduce biodiversity, and disrupt ecosystems. For humans, exposure to ionizing radiation increases the risk of cancer, genetic disorders, and organ damage. The Chernobyl disaster of 1986 is a stark example, where radioactive fallout led to long-term health and environmental consequences. Controlling radioactive pollution requires stringent safety measures, international cooperation, and robust regulatory frameworks.

Q2: Discuss the role of international treaties and organizations in controlling radioactive pollution. Are these measures sufficient?

Answer: International treaties and organizations play a crucial role in controlling radioactive pollution. The International Atomic Energy Agency (IAEA) promotes the peaceful use of nuclear energy and establishes safety standards. Treaties like the Treaty on the Non-Proliferation of Nuclear Weapons (NPT) and conventions such as the Joint Convention on the Safety of Spent Fuel Management aim to ensure the safe handling, storage, and disposal of radioactive materials. While these measures have enhanced global cooperation and established safety protocols, challenges such as nuclear proliferation, inadequate compliance, and regional disparities in regulation remain. Strengthening enforcement mechanisms, promoting transparency, and fostering international collaboration are essential to address these challenges.

Q3: Evaluate the effectiveness of nuclear safety regulations in preventing radioactive pollution. What improvements can be made?

Answer: Nuclear safety regulations, enforced by national and international bodies, have significantly reduced the risk of radioactive pollution. Stringent safety standards, regular inspections, and robust emergency response mechanisms have improved operational safety in nuclear power plants. However, incidents like the Fukushima Daiichi disaster in 2011 highlight areas for improvement, such as enhanced safety protocols for natural disasters, better risk assessment, and public awareness initiatives. Investing in advanced nuclear technologies, improving regulatory compliance, and promoting global sharing of best practices can further enhance nuclear safety and prevent radioactive pollution.

Previous Year Questions on Radioactive Pollution

1. UPSC CSE Prelims 2019:

Question: Which of the following measures is most effective in reducing exposure to indoor radon gas?

A) Increasing the use of fossil fuels
B) Improving indoor ventilation
C) Sealing windows and doors
D) Using air conditioners

Answer: (B)

Explanation: Improving indoor ventilation helps to reduce radon gas levels by allowing it to disperse and reducing its concentration in homes.

2. UPSC CSE Mains 2017 (GS Paper 3):

Question: "Critically analyze the impact of nuclear energy production on the environment and discuss measures to mitigate the associated risks."

Answer: Nuclear energy production offers a low-carbon alternative to fossil fuels, but it poses environmental risks, including radioactive pollution from mining, waste disposal, and potential accidents. Spent nuclear fuel and radioactive waste require secure storage to prevent contamination. Accidents such as Chernobyl and Fukushima have demonstrated the long-term consequences of radioactive pollution. Mitigating these risks requires stringent safety protocols, secure waste management, investment in advanced reactor designs, and international collaboration to ensure compliance with safety standards and promote best practices.