AP Environmental Science Flashcards: Nuclear Power

What this deck covers

This deck focuses on Nuclear Power, giving you a quick way to review the definitions, rules, and examples that matter most for AP Environmental Science.

How to use these flashcards

Work through these flashcards in short sessions. Try to answer each prompt before flipping the card, then revisit any cards you miss until the explanation feels automatic.

Flashcard 1: What is the purpose of a containment structure in a nuclear plant?

Answer: To prevent the release of radioactive materials. Thick concrete barrier around reactor core.

Flashcard 2: What is nuclear waste?

Answer: Radioactive materials left over from nuclear reactions. Remains hazardous for thousands of years.

Flashcard 3: Identify one environmental impact of nuclear power.

Answer: Thermal pollution from reactor cooling systems. Hot water discharge affects aquatic ecosystems.

Flashcard 4: Identify a method for managing nuclear waste.

Answer: Deep geological storage. Isolates waste from environment for millennia.

Flashcard 5: What is the purpose of a containment structure in a nuclear plant?

Answer: To prevent the release of radioactive materials. Thick concrete barrier around reactor core.

Flashcard 6: What is the role of a turbine in a nuclear power plant?

Answer: To convert steam energy into mechanical energy. Steam pressure spins blades to generate electricity.

Flashcard 7: What does the term 'half-life' refer to?

Answer: The time taken for half of a radioactive substance to decay. Fundamental measure of radioactive decay rate.

Flashcard 8: What is the function of the secondary loop in a PWR?

Answer: To transfer heat from the primary loop to produce steam. Isolates radioactive primary coolant from turbines.

Flashcard 9: What is the unit of radioactivity?

Answer: Becquerel (Bq). Measures nuclear disintegrations per second.

Flashcard 10: Which isotope of uranium is fissile?

Answer: Uranium-235. Can sustain a chain reaction unlike U-238.

Flashcard 11: Which process occurs in the sun's core?

Answer: Nuclear fusion. Hydrogen nuclei combine to form helium.

Flashcard 12: What is a meltdown in the context of nuclear power?

Answer: A severe overheating of the reactor core. Loss of cooling leads to fuel damage.

Flashcard 13: What is nuclear waste?

Answer: Radioactive materials left over from nuclear reactions. Remains hazardous for thousands of years.

Flashcard 14: What is the unit of radioactivity?

Answer: Becquerel (Bq). Measures nuclear disintegrations per second.

Flashcard 15: What is a pressurized water reactor (PWR)?

Answer: A reactor where water is kept under pressure to prevent boiling. Most common reactor type worldwide.

Flashcard 16: What is the primary component of nuclear fuel rods?

Answer: Uranium dioxide (UO₂). Ceramic pellets stacked in metal tubes.

Flashcard 17: What is nuclear fusion?

Answer: The process of combining two nuclei to form a heavier nucleus. Powers the sun and releases massive energy from light nuclei.

Flashcard 18: What is the primary purpose of a nuclear power plant?

Answer: To generate electricity. Heat from fission drives steam turbines.

Flashcard 19: What is a breeder reactor?

Answer: A reactor that generates more fissile material than it consumes. Converts non-fissile U-238 into fissile Pu-239.

Flashcard 20: What is the primary component of nuclear fuel rods?

Answer: Uranium dioxide (UO₂). Ceramic pellets stacked in metal tubes.

Flashcard 21: Which isotope of uranium is fissile?

Answer: Uranium-235. Can sustain a chain reaction unlike U-238.

Flashcard 22: What is the role of control rods in a nuclear reactor?

Answer: To absorb neutrons and regulate the fission reaction. Inserted or withdrawn to control reaction rate.

Flashcard 23: Identify a challenge of decommissioning nuclear power plants.

Answer: Safe disposal of radioactive materials. Contaminated materials require careful handling.

Flashcard 24: Which gas is used as a coolant in some nuclear reactors?

Answer: Carbon dioxide or helium. Non-reactive gases avoid corrosion issues.

Flashcard 25: What type of radiation is emitted during nuclear decay?

Answer: Alpha, beta, or gamma radiation. Different types have varying penetration abilities.

Flashcard 26: What is a pressurized water reactor (PWR)?

Answer: A reactor where water is kept under pressure to prevent boiling. Most common reactor type worldwide.

Flashcard 27: Identify one advantage of nuclear power.

Answer: Low greenhouse gas emissions during operation. No CO₂ emissions during electricity generation.

Flashcard 28: State the formula for energy released in nuclear reactions.

Answer: $E = mc^2$. Einstein's equation shows mass converts to energy.

Flashcard 29: What is plutonium-239 used for in nuclear reactors?

Answer: As a fissile material for nuclear fuel. Artificial isotope created from U-238 in reactors.

Flashcard 30: What is a thermal neutron?

Answer: A neutron slowed to thermal equilibrium with its surroundings. Low-energy neutrons more likely to cause fission.

Flashcard 31: What is a meltdown in the context of nuclear power?

Answer: A severe overheating of the reactor core. Loss of cooling leads to fuel damage.

Flashcard 32: What is the role of a turbine in a nuclear power plant?

Answer: To convert steam energy into mechanical energy. Steam pressure spins blades to generate electricity.

Flashcard 33: What does 'enriched uranium' mean?

Answer: Uranium with increased U-235 concentration. Higher U-235 content enables sustained reactions.

Flashcard 34: What is the role of a moderator in a nuclear reactor?

Answer: To slow down neutrons to sustain the chain reaction. Fast neutrons must be slowed for efficient fission.

Flashcard 35: What is the purpose of a nuclear reactor's pressure vessel?

Answer: To contain the reactor core and coolant under high pressure. Prevents radioactive material release during operation.

Flashcard 36: What is nuclear fission?

Answer: The splitting of an atomic nucleus into smaller parts. Releases enormous energy when heavy nuclei break apart.

Flashcard 37: Identify one disadvantage of nuclear power.

Answer: Potential risk of nuclear accidents. Catastrophic failures can release radiation over wide areas.

Flashcard 38: Which element is commonly used as a moderator in reactors?

Answer: Graphite or heavy water. These materials slow neutrons effectively.

Flashcard 39: What is the function of a coolant in a nuclear reactor?

Answer: To remove heat from the reactor core. Prevents core overheating and meltdown.

Flashcard 40: What is the function of a steam generator in a nuclear plant?

Answer: To convert water into steam using reactor heat. Drives turbines to generate electricity.

Flashcard 41: What is nuclear fusion?

Answer: The process of combining two nuclei to form a heavier nucleus. Powers the sun and releases massive energy from light nuclei.

Flashcard 42: What is the function of the secondary loop in a PWR?

Answer: To transfer heat from the primary loop to produce steam. Isolates radioactive primary coolant from turbines.

Flashcard 43: Identify a byproduct of nuclear fission.

Answer: Radioactive isotopes. Fission fragments are highly radioactive.

Flashcard 44: What is the typical lifespan of a nuclear reactor?

Answer: 30 to 40 years. Design life determined by neutron radiation damage.

Flashcard 45: What is nuclear fission?

Answer: The splitting of an atomic nucleus into smaller parts. Releases enormous energy when heavy nuclei break apart.

Flashcard 46: Which process occurs in the sun's core?

Answer: Nuclear fusion. Hydrogen nuclei combine to form helium.

Flashcard 47: What is a breeder reactor?

Answer: A reactor that generates more fissile material than it consumes. Converts non-fissile U-238 into fissile Pu-239.

Flashcard 48: Identify one safety feature of a nuclear power plant.

Answer: Emergency core cooling system. Multiple backup systems prevent accidents.

Flashcard 49: Identify one environmental impact of nuclear power.

Answer: Thermal pollution from reactor cooling systems. Hot water discharge affects aquatic ecosystems.

Flashcard 50: Which element is commonly used as a moderator in reactors?

Answer: Graphite or heavy water. These materials slow neutrons effectively.

Flashcard 51: What is a boiling water reactor (BWR)?

Answer: A reactor where water boils directly in the reactor core. Simpler design with direct steam generation.

Flashcard 52: What is plutonium-239 used for in nuclear reactors?

Answer: As a fissile material for nuclear fuel. Artificial isotope created from U-238 in reactors.

Flashcard 53: What is a chain reaction in nuclear physics?

Answer: A self-sustaining sequence of fission reactions. Each fission triggers more fissions in a continuous cycle.

Flashcard 54: Which gas is used as a coolant in some nuclear reactors?

Answer: Carbon dioxide or helium. Non-reactive gases avoid corrosion issues.

Flashcard 55: Identify a method for managing nuclear waste.

Answer: Deep geological storage. Isolates waste from environment for millennia.

Flashcard 56: What is the function of a coolant in a nuclear reactor?

Answer: To remove heat from the reactor core. Prevents core overheating and meltdown.

Flashcard 57: What type of radiation is emitted during nuclear decay?

Answer: Alpha, beta, or gamma radiation. Different types have varying penetration abilities.

Flashcard 58: Identify a challenge of decommissioning nuclear power plants.

Answer: Safe disposal of radioactive materials. Contaminated materials require careful handling.

Flashcard 59: What is the purpose of a nuclear reactor's pressure vessel?

Answer: To contain the reactor core and coolant under high pressure. Prevents radioactive material release during operation.

Flashcard 60: What is the role of a moderator in a nuclear reactor?

Answer: To slow down neutrons to sustain the chain reaction. Fast neutrons must be slowed for efficient fission.

Flashcard 61: What does the term 'half-life' refer to?

Answer: The time taken for half of a radioactive substance to decay. Fundamental measure of radioactive decay rate.

Flashcard 62: State the formula for energy released in nuclear reactions.

Answer: $E = mc^2$. Einstein's equation shows mass converts to energy.

Flashcard 63: What is a chain reaction in nuclear physics?

Answer: A self-sustaining sequence of fission reactions. Each fission triggers more fissions in a continuous cycle.

Flashcard 64: What is a boiling water reactor (BWR)?

Answer: A reactor where water boils directly in the reactor core. Simpler design with direct steam generation.

Flashcard 65: What is a thermal neutron?

Answer: A neutron slowed to thermal equilibrium with its surroundings. Low-energy neutrons more likely to cause fission.

Flashcard 66: What is the primary fuel used in nuclear reactors?

Answer: Uranium-235. This isotope readily splits when hit by neutrons.

Flashcard 67: Identify one disadvantage of nuclear power.

Answer: Potential risk of nuclear accidents. Catastrophic failures can release radiation over wide areas.

Flashcard 68: What is the primary fuel used in nuclear reactors?

Answer: Uranium-235. This isotope readily splits when hit by neutrons.

Flashcard 69: Identify a byproduct of nuclear fission.

Answer: Radioactive isotopes. Fission fragments are highly radioactive.

Flashcard 70: What does 'enriched uranium' mean?

Answer: Uranium with increased U-235 concentration. Higher U-235 content enables sustained reactions.

Flashcard 71: What is the typical lifespan of a nuclear reactor?

Answer: 30 to 40 years. Design life determined by neutron radiation damage.

Flashcard 72: What is the role of control rods in a nuclear reactor?

Answer: To absorb neutrons and regulate the fission reaction. Inserted or withdrawn to control reaction rate.

Flashcard 73: What is the primary purpose of a nuclear power plant?

Answer: To generate electricity. Heat from fission drives steam turbines.

Flashcard 74: Identify one advantage of nuclear power.

Answer: Low greenhouse gas emissions during operation. No CO₂ emissions during electricity generation.

Flashcard 75: Identify one safety feature of a nuclear power plant.

Answer: Emergency core cooling system. Multiple backup systems prevent accidents.

Flashcard 76: What is the function of a steam generator in a nuclear plant?

Answer: To convert water into steam using reactor heat. Drives turbines to generate electricity.