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How big is Zaporizhzhia nuclear plant and could it be another Chernobyl?

The Zaporizhzhia nuclear power plant is the largest in Europe and the ninth largest in the world (Credits: Energoatom)

You’ve probably never heard of the Zaporizhzhia nuclear power plant before, but it’s a giant.

Located in south-east Ukraine, it’s the largest nuclear power station in all of Europe and normally produces 20 per cent of the country’s electricity supply all by itself.

Now, following an onslaught by Russian forces, the power station is under Vladimir Putin’s control.

In normal times, the Zaporizhzhia plant would be using its six reactors to pump out enough energy to power four million homes.

For the latest updates on the Russia-Ukraine war, visit our live blog: Russia-Ukraine live

Early on Friday morning, the State Inspectorate for Nuclear Regulation said the plant is now occupied by the military forces of the Russian Federation.

Power plant

A fire broke out at the plant in the northeastern city on Energodar following a Russian shelling attack (Picture: AP/Reuters)

A statement on social media said that station staff continue to work and monitor the state of the power units to ‘ensure their safe operation’.

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How big is the Zaporizhzhia nuclear power plant?

Zaporizhzhya Nuclear Power Plant

The power plant sits on the banks of the Kakhovka reservoir (Provider: Energoatom)

The plant has been operational since 1984 and sits on a 104.7 hectare site (0.5 square-mile) on the banks of the Kakhovka reservoir.

Each of the plant’s six reactors is capable of generating a gross electrical capacity of 1,000-Megawatts each.

For comparison, an average nuclar plant in the United States, sitting on a one-square-mile site, would generate 1,000-Megawatts in its entirety.

Warter from the Kakhovka reservoir is crucial for the cooling and the operation of the plant.

Workers inside Zaporizhzhya Nuclear Power Plant

Workers inside the pressurised water reactors at Zaporizhzhia (Provider: Energoatom)

Any spent nuclear fuel from the reactors is stored in cooling pools for four to five years until the residual energy and radioactivity decrease.

How does the Zaporizhzhia plant compare to Chernobyl?

Chernobyl nuclear power plant

Inside the Chernobyl nuclear power plant a few months after the disaster. (Credits: Getty)

Compared to Zaporizhzhia, the more famous Chernobyl power plant is much smaller.

Chernobyl only had four reactors and was capable of producing about 10% of Ukraine’s electricity needs at the time.

However, more reactors were scheduled to be built before the disaster on April 26, 1986.

Facility control desk at the Chernobyl Nuclear Power Plant

The facility control desk of Reactor 1 at Chernobyl (Credits: Getty)

Crucially, the two plants use different types of reactor design.

Chernobyl used Soviet-designed RBMK-1000 nuclear reactors. This design is now widely recognised as inherently flawed and used pressure tubes containing enriched U-235 uranium dioxide fuel to heat water.

The resulting steam would drive the reactors’ turbines and generate electricity.

Reactor 4 under construction at the Chernobyl Nuclear Power Plant

Reactor 4 under construction at the Chernobyl Nuclear Power Plant in the former Soviet Union (Credits: TASS)

By contrast, Zaporizhzhia houses six VVER-1000 nuclear reactors, also designed by the Soviets.

These are pressurised water reactors (PWRs) that creates the heat from nuclear fuel in a central core then uses pressurised water to carry it into a steam generator where it meets water in a secondary loop that creates steam to power the turbine.

For safety reasons, the VVER-1000 reactors are encased in a confinement shell capable of being hit by an aircraft weighing up to 20 tonnes without suffering any expected damage.

Is there a radiation threat from the Zaporizhzhia nuclear power plant?

Zaporizhzhya Nuclear Power Plant

The Zaporizhzhya nuclear power plant is much safer than Chernobyl (Provider: Energoatom)

The Zaporizhzhia nuclear power plant – whether controlled by the Russians or the Ukrainians – has multiple safety precautions in place.

According to the International Atomic Energy Agency, the effects of the Russian attack have not affected essential equipment or caused radiation levels to change at this point.

US officials also said there was no indication of elevated radiation levels at the plant.

What would happen if the Zaporizhzhia nuclear power plant explodes?

A view shows a school building destroyed by shelling, as Russia's invasion of Ukraine continues, in Zhytomyr, Ukraine March 4, 2022. REUTERS/Viacheslav Ratynskyi

A school building destroyed by shelling, as Russia’s invasion of Ukraine continues (Credits: Reuters)

If an explosion were to occur – the results would be catastrophic.

Ukrainian politicians have said there is a ‘real threat of nuclear danger’, with foreign minister Dmytro Kuleba warning: ‘If it blows up, it will be 10 times larger than Chernobyl.’

The plant is significantly bigger than Chernobyl and the resulting blast would kill thousands in the surrounding area.

Depending on weather conditions, radiation could well be carried further into Europe, even as far as London.

But, to be clear, the chances of that are unlikely given that the PWR design is much safer than what was in place in Chernobyl.

What happened at the Chernobyl power plant?

Abandoned city of Pripyat near Chernobyl

A view shows the abandoned city of Pripyat near the Chernobyl Nuclear Power Plant, Ukraine, April 12, 2021. (Reuters)

In April 1986, reactor four at the Chernobyl Nuclear Power Plant, which was located close to the town of Pripyat in the Ukraine, exploded during a safety test.

The safety test was designed to simulate a power-failure at the station, therefore emergency safety systems were purposefully turned off.

control panel at Chernobyl after the disaster

The control panel of reactor unit 4, seen here on June 1, 2006 inside the Chernobyl exclusion zone and nuclear power plant, Ukraine. (Credits: Getty)

After the explosion, a fire raged and was not contained until 4 May, and all the while the dangerous nuclear fallout permeated the air and traveled through the atmosphere to parts of western Europe and the USSR.

Today, it’s known as the worst nuclear disaster in history, with, as of a 2005 report, 56 deaths attributed to either the explosion or the radiation.

chernobyl graphic

The Chernobyl explosion is the worst nuclear disaster in history (MailOnline)

Of those deaths, 47 were emergency service workers, and nine were children who died of thyroid cancer.

The same IAEA report claimed that 4,000 more could still die as time goes by due to diseases like cancer as a result of the fallout, however some claim that the number of deaths could actually grow to be much higher.

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Up until the Russian invasion, tourists could visit Chernobyl and the nearby Pripyat, which remains abandoned to this day, as long as they had a tour guide and followed the proper authorisation procedures.

Certain areas, like the basement area of the hospital where the clothing and tools of the emergency responders were left, are still off-limits due to the fears of lingering radiation.

MORE : Europe’s biggest nuclear power plant ‘captured by Russian forces’ in Ukraine

MORE : Battle for Europe’s biggest nuclear power plant takes terrifying turn

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