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Country South Africa
Location Western Cape
Coordinates 33°40′35.2″S 18°25′55.37″E / 33.676444°S 18.4320472°E / -33.676444; 18.4320472Coordinates: 33°40′35.2″S 18°25′55.37″E / 33.676444°S 18.4320472°E / -33.676444; 18.4320472
Status Operational
Construction began 1976
Commission date 1984
Owner(s) Eskom
Operator(s) Eskom
Nuclear power station
Reactor type Pressurized water reactor
Reactor supplier Framatome
Power generation
Units operational 2 x 900 MW
Annual generation 13668
Koeberg in red with the other potential nuclear sites in blue

Koeberg nuclear power station is a nuclear power station in South Africa. It is currently the only commercial one in the country, and the sole commercial one in the entire African continent. It is located 30 km north of Cape Town, near Melkbosstrand on the west coast of South Africa. Koeberg is owned and operated by the country's only national electricity supplier, Eskom. The two reactors at the station form the cornerstone of the South African nuclear program.

Current anti-nuclear campaigns against Koeberg are being run by Earthlife Africa and Koeberg Alert.


Koeberg contains two uranium pressurised water reactors based on a design by Framatome of France. Koeberg supplies power to the national grid so that over-capacity can be redistributed to the rest of the country on an as-needed basis. Koeberg is rated at 1,800 MW, its average annual production is 13,668 GWh and it has two large turbine generators (2 × 900 MW).[1]

The plant was constructed near Cape Town to be the sole provider of power in the Western Cape after fossil-fuel power stations were deemed too small and too expensive to be viable. Nuclear power was considered because it was more economical than transporting coal to the existing fossil-fuel power stations, and construction of new fossil-fuel power-stations, which would have required 300 m tall chimneys to comply with clean-air legislation.[citation needed] Athlone Power Station in the city was too small to provide Cape Town's needs, and the Paarden Island power station (itself too small) has been demolished.

The reactor at Koeberg is cooled by cold water from the Atlantic Ocean pumped through an isolated circuit at 80 tons a second.[2] Low and intermediate level waste from Koeberg is transported by road in steel and concrete containers to a rural disposal site at Vaalputs, 600 km away in the Kalahari Desert. The grounds of the nuclear plant form a 22 km² nature reserve open to the public containing more than 150 species of birds and half a dozen small mammal species.

The power plant was originally located outside the metropolitan area, whose growth has far exceeded expectations in the intervening 20 years, so that the power plant is now close to suburban housing. The plant administration enforces maximum housing density regulations in case of evacuation, which precludes the construction of high rise buildings.


Construction of the plant began in 1976, and Unit 1 was synchronised to the grid on 4 April 1984. Unit 2 followed on 25 July 1985.

On 8 January 1982, the 70th anniversary of the formation of the African National Congress, Umkhonto we Sizwe, the armed wing of the ANC attacked Koeberg nuclear power plant while it was still under construction.[3] Damage was estimated at R 500 million and the commissioning of the plant was put back by 18 months.[4] In 2010, the bomber was identified as being Rodney Wilkinson.[5]

In August 2002 twelve Greenpeace activists obtained access to the station. Six of them scaled the wall of the plant to hang up an anti-nuclear protest banner. The twelve were arrested and fined.[6]

At the end of 2005, Koeberg started experiencing numerous technical difficulties. On 11 November 2005, a fault on a transmission busbar caused the reactor to go into safe mode, cutting supply to most of the Western Cape for about two hours. On 16 November a fire under a 400kV transmission line caused the line to trip, causing severe voltage dips which resulted in Koeberg once again shutting down. Various parts of the Cape were left without electricity for hours at a time. On the evening of 23 November, a routine inspection of the backup safety system revealed a below-spec concentration of an important chemical, resulting in a controlled shutdown of the reactor. Due to the sufficiency of backup supply, major power cuts were not experienced until Friday 25 November, when the backup capacity began running out. At this point, rotational load shedding was employed, with customers being switched off in stages for most of the day. Koeberg was re-synchronised to the national grid on Saturday 26 November.

On Sunday 25 December 2005, the generator of Unit 1 was damaged. While the generator was being powered up after scheduled refuelling and maintenance, a loose bolt, which was left inside the generator caused severe damage, forcing it to be shut down. Subsequent to the unexpected unavailability of Unit 1, Unit 2 was also brought down for scheduled refuelling, resulting in a severe shortage of supply to the Western Cape. This resulted in widespread load shedding in order to maintain the stability of the network. A replacement rotor for Unit 1 was shipped in from France and the unit was brought back into operation in May 2006.

On 18 and 19 February 2006 large parts of the Western Cape again experienced blackouts due to a controlled shutdown of Koeberg. According to Eskom and the City of Cape Town, power cuts were to continue until 26 February 2006, however power supply problems continued beyond this date.

The estimated economic losses due to the power cuts was over R 500 M as at February 2007, and was estimated to rise to possibly as high as R 2 billion.

On 12 September 2010, 91 members of staff were contaminated with Cobalt-58 dust in an incident that appears confined to the plant.[7]

Opposition to Koeberg[edit]

South Africa's fledgling nuclear industry has seen its fair share of opposition, chiefly from environmentalists concerned about safety issues such as radioactive waste, and anti-war activists concerned about nuclear proliferation and use of atomic weapons. Current campaigns against nuclear energy are being run by Earthlife Africa and Koeberg Alert.

See also[edit]


  1. ^ "Koeberg Nuclear Power Station". Eskom. Retrieved 14 May 2007. 
  2. ^ "Generating Electricity At A Nuclear Power Station". Eskom. 
  3. ^ "History of MK". African National Congress. Archived from the original on 4 April 2007. Retrieved 14 May 2007. 
  4. ^ Helen Bamford (11 March 2006). "Koeberg: SA's ill-starred nuclear power plant". Cape Argus. Retrieved 14 May 2007. 
  5. ^ Beresford, David (2010). Truth is a Strange Fruit: A Personal Journey Through the Apartheid War. Jacana. ISBN 978-1-77009-902-9. 
  6. ^ Jo-Anne Smetherham (25 August 2002). "Greenpeace in the dock over Koeberg raid". Cape Times. Retrieved 14 May 2007. 
  7. ^ SAPA (20 September 2010). "Koeberg workers contaminated". News24. Retrieved 22 September 2010. 


  1. Nuclear Tourist. Includes a picture.
  2. Koeberg details
  3. Evacuation modelling for Koeberg
  4. Google Map Satellite Image
  5. January 2006 Eskom media release on Koeberg's problems.

Original courtesy of Wikipedia: http://en.wikipedia.org/wiki/Koeberg_Nuclear_Power_Station — Please support Wikipedia.
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11 news items

Fri, 28 Mar 2014 01:18:57 -0700

Today, the Koeberg Nuclear Power Station produces about 5 percent of the nation's electricity. President Jacob Zuma said he wants more nuclear power to decrease the nation's reliance on coal. "We expect to conclude the procurement of 9,600 megawatts of ...
Mon, 24 Mar 2014 04:37:30 -0700

The power utility said unit 2 at the Koeberg nuclear power station has been shut down for maintenance and would remain offline for the next six weeks. This will result in a daily loss of 900 MW of power. Eskom's Andrew Etzinger said: "Electricity ...
Voice of America
Thu, 27 Mar 2014 08:31:44 -0700

South Africa currently has two nuclear reactors at its Koeberg Nuclear Power Station. The waste from those reactors is disposed of at the Vaalputs Radioactive Waste Disposal Facility. Gilbert said South Africa has done little to study the effects of ...
Eyewitness News
Mon, 24 Mar 2014 00:07:30 -0700

The power utility said unit 2 at the Koeberg nuclear power station has been shut down for maintenance and would remain offline for the next six weeks. This will result in a daily loss of 900 MW of power. Eskom's Andrew Etzinger said, “Electricity ...


Tue, 25 Mar 2014 20:56:15 -0700

Despite system stability hanging in the balance, the utility shut down Koeberg nuclear power station's unit two on Sunday for refuelling, inspection and maintenance which accounted for 900 MW of the planned maintenance figure, Eskom said. “The shutdown ...
South Africa.info
Mon, 14 Apr 2014 02:45:00 -0700

... on the aspect of skills training. There will be new disciplines and job opportunities." Source: SAnews.gov.za. Print this page. Send to a friend. The Koeberg nuclear power station outside Cape Town - Africa's sole nuclear power station (Photo ...
Daily Maverick
Mon, 07 Apr 2014 15:52:30 -0700

The 11 TWh/annum of electricity received by Eskom from Cahora Bassa is just less than the total output provided by the Koeberg nuclear power station (about 13 TWh/annum). The contract with Eskom allows Mozambique to use excess Cahora Bassa ...
Thu, 03 Apr 2014 05:06:55 -0700

The last nuclear build (Koeberg nuclear power station) was done more than 25 years ago. The HRDC is under the management of the Higher Education and Training Minister to build the human resource development base required ensuring a prosperous ...

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