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History of Nuclear Energy

Kazakhstan's nuclear industry has a long and rich history, beginning in the Soviet period and continuing to the present day. Below is a timeline of key stages in the industry's development: from the first uranium deposits and research reactors to the launch of the modern nuclear energy program.

A nuclear reactor is a facility where a controlled chain reaction of uranium fission takes place.

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How it works:

  1. Fuel (uranium rods) splits, releasing heat
  2. Water in the reactor heats up and turns into steam
  3. Steam rotates a turbine connected to a generator that produces electricity
  4. After that, the steam cools down and is reused in the cycle
  5. Electricity is supplied to the city through power lines

Reactor safety is ensured by multi-level protection systems, such as a double hermetic shell, a combination of passive and active protection systems, including a cooling system and emergency shutdown.

The reaction rate is regulated by special control rods — they absorb excess neutrons.

Working principle: nuclear energy is converted into heat, and then into electricity.

Types of Reactors Considered for Kazakhstan

Below are the main types of reactors being considered as possible options for the construction of a nuclear power plant in Kazakhstan.

Water-Water Reactor (VVER-1200, Russia)

Generation: III+

Developer: Rosatom (Russia)

Thermal capacity: 3300 MW(th)

Electric capacity: 1200 MW(e)

Core: 163 fuel assemblies

Scheme: four-loop

Fuel cycle: 12–18 months (extendable)

VVER combines active and passive safety systems, ensuring stable operation even in case of loss of external power supply. The design complies with IAEA international standards for generation III+ plants.

Deployed: Russia, Belarus

Under construction: Egypt, Bangladesh, Hungary, China

Water-Water Reactor (VVER-1200, Russia)

Pressurized Water Reactor (HPR1000, China)

Generation: III+

Developer: CNNC (China)

Thermal capacity: 3050 MW(th)

Electric capacity: 1200 MW(e)

Core: 177 CF3 fuel assemblies (UO₂)

Scheme: three-loop

Fuel cycle: 18 months (extendable)

HPR1000 combines active and passive safety systems.

Deployed:

  • China — Fuqing-5, Fuqing-6, Fangchenggang-3, Fangchenggang-4, Zhangzhou-1
  • Pakistan — Karachi-2, Karachi-3
Pressurized Water Reactor (HPR1000, China)

Small Modular Reactor

  • Reactors up to 300 MW as defined by IAEA
  • Modular design, low power and high safety
  • Equipped with passive safety systems and simplified design
  • First SMRs in operation: floating NPP Akademik Lomonosov (Russia) and HTR-PM (China, 210 MW)
  • Considered a promising solution for remote and Arctic regions
  • Over 80 SMR concepts currently under development
Small Modular Reactor

Safety of Modern NPPs: Nuclear, Radiation and Physical Protection

Modern nuclear power plants are high-tech facilities where safety is a priority principle of design, construction and operation.

The risk of an accident does not exceed 1:10 million per year. The resilience of modern designs can withstand earthquakes up to magnitude 9.

According to IAEA data, the risk of serious accidents at modern reactors is extremely low and continues to decrease thanks to strict regulation and innovation.

Nuclear safety is aimed at preventing accidents and controlling the chain reaction. Modern reactors have up to four protection barriers: fuel matrix, fuel cladding, hermetic reactor vessel and protective shell.

Radiation safety is aimed at minimizing radiation doses for workers, the public and the environment.

The effective dose for NPP personnel does not exceed 20 mSv per year, and for the public — less than 1 mSv/year above natural background.

Globally, according to the World Nuclear Association, the radiation background from NPPs is comparable to natural background from space and soil.

Nuclear physical security covers measures against terrorism, theft of nuclear materials and unauthorized access to them.

Modern NPP designs are developed taking into account external impacts, including earthquakes, floods, loss of power supply and other extreme events.

Modern NPPs demonstrate a high level of safety thanks to multi-level systems, strict regulation and continuous improvement.

Nuclear Energy and Ecology

Nuclear energy is one of the most environmentally friendly sources of electricity.

  • When generating 1 kWh, a nuclear plant emits only about 12 grams of CO₂, which is dozens of times less than coal or gas plants.
  • One 1000 MW NPP prevents the emission of up to 4 million tons of CO₂ per year — equivalent to removing about 1 million cars from the roads.
  • This effect is comparable to the air purification provided by 200 million trees or the preservation of hundreds of thousands of hectares of forest.
  • The development of nuclear energy helps Kazakhstan reduce its carbon footprint and protect the environment for future generations.

Myths and Facts about NPPs

Common myths about nuclear energy and brief facts that counter them.

Myth: Living near a NPP is dangerous — it emits radiation

Fact: The radiation dose from the plant is minimal and safe.

Myth: A NPP can explode like Chernobyl

Fact: Modern reactors have multi-level protection — automatic shutdown, passive cooling, hermetic containment. The risk of an accident does not exceed 1:10 million per year.

Myth: Radiation contaminates food and air

Fact: All emissions and waste are under strict control, the external environment receives no contamination.

Myth: Working at a NPP is harmful

Fact: Personnel are protected, the exposure level is significantly below international standards.

Myth: Any radiation is deadly

Fact: Radiation is a natural part of nature. Small doses are safe for humans.

Myth: NPPs harm the environment

Fact: Nuclear plants do not emit CO₂ and are considered an environmentally friendly energy source.

Myth: A NPP can fail during an earthquake and cause bad consequences

Fact: Safety systems of modern NPPs are designed for earthquakes up to magnitude 9 and can shut down the reactor without threat to the environment.

Test Your Knowledge

Nuclear Energy Quiz

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