Notes on Nuclear Power Lecture

Introduction

• Discussion on the complexities and frustrations surrounding arguments about nuclear power.
• Historical context starting from the 1940s.
• Initial promise of nuclear energy as a peaceful use post-World War II.

Early Enthusiasm for Nuclear Power

• Imagination ran wild about possibilities:
  • Free electricity
  • Nuclear-powered vehicles and homes
  • Thought to be just a few years away.

Reality Check in Nuclear Power Development

• Complications and high costs associated with nuclear power.
• Difficulty in transitioning from physics to engineering.
• Private companies viewed nuclear power as a risky investment; preferred gas, coal, and oil.
• Motivation to continue development included:
  • Potential for cheap electricity
  • Desire for energy independence
  • Interest in atomic weaponry.

Nuclear Power Boom in the 1970s

• Oil crisis in the Middle East in the early 1970s led to increased investment.
• Over half of the world’s nuclear reactors built between 1970 and 1985.
• Light water reactors became the favored choice due to:
  • Simplicity
  • Reliability
  • Cost-effectiveness.

Light Water Reactor Functionality

• Basic principle:
  • Heats water through artificial chain reaction.
  • Nuclear fission releases millions of times more energy than chemical reactions.
  • Heavy elements like uranium-235 are bombarded with neutrons, causing fission and energy release.
• Role of water:
  • Acts as both moderator and coolant.
• Advantages of light water reactors:
  • Simple and cheap, but not the safest or most efficient.

Nuclear Accidents and Their Impact

• Major incidents that affected public perception:
  • 1979: Three Mile Island incident
  • 1986: Chernobyl disaster
  • 2011: Fukushima disaster.
• Resulted in stagnation of new nuclear reactors post-1980s despite initial growth.

Current State of Nuclear Power

• Contributes approximately 10% of global energy demand.
• Around 439 reactors in 31 countries as of 2015.
• About 70 new reactors under construction, mainly in rapidly growing countries.
• 116 new reactors planned worldwide.
• Majority of reactors (over 80%) are light water types and over 25 years old.

Future Considerations

• Choices facing countries:
  • Replace aging reactors with modern, efficient models or
  • Move away from nuclear power towards other technologies.
• Upcoming discussion on pro and contra arguments regarding nuclear energy.