Nuclear energy

Nuclear energy plays a major role in electricity production at Axpo. Safety and reliability are of paramount importance at all times. The nuclear power plants are regularly upgraded with the latest technology; they must satisfy the most stringent safety regulations and be cost-efficient on a long-term basis.

Axpo owns just under 40 per cent of the installed production capacities in Swiss nuclear power plants.
Axpo's power plant operations include its own Beznau nuclear power plant, shareholdings in co-owned nuclear power plants in Gösgen and Leibstadt, and procurement rights to output from French nuclear power plants.

On average, nuclear energy accounts for around two-thirds of the total volume of energy sourced by Axpo every year. The nuclear power plants supply baseload energy, which is continuously available at constant output and is virtually CO2-free.

Beznau nuclear power plant

The Beznau nuclear power plant (KKB) is located in the lower Aare Valley, not far from where the Aare feeds into the Rhine. Beznau is situated in close proximity to large consumption centres in the Mittelland (Central Plateau) region of Switzerland. The power plant stands on an island formed by the course of the Aare and the canal for the Beznau hydroelectric power plant. The Aare guarantees an adequate supply of cold water, which means there is no need for a cooling tower.

Reaktorblöcke
The two identical reactor units 1 and 2

The Beznau nuclear power plant (KKB) is located in the lower Aare Valley, not far from where the Aare feeds into the Rhine. Beznau is situated in close proximity to large consumption centres in the Mittelland (Central Plateau) region of Switzerland. The power plant stands on an island formed by the course of the Aare and the canal for the Beznau hydroelectric power plant. The Aare guarantees an adequate supply of cold water, which means there is no need for a cooling tower.
The KKB comprises two largely identical facilities, Unit 1 and Unit 2, each with a net output of 365 megawatts (MW). Both facilities are baseload power plants, which means they generate electricity at a constant output around the clock, apart from two to four weeks every summer when they are shut down for their annual inspection and for the replacement of fuel rods.
Both of the units in the Beznau nuclear power plant are equipped with Westinghouse pressurised water reactors.

Glance at a power plant

Cycle

Start of operationUnit 1: 1969
 Unit 2: 1971
Installed capacity (net)365 MW per unit
Type of reactorPressurised water reactor
Reactor manufacturerWestinghouse
EmployeesApprox.500
Beznau
Nuclear power plant Beznau
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