Pelindaba (Zulu for "end of story" or "the conclusion") is South Africa's main Nuclear Research Centre, run by The South African Nuclear Energy Corporation. It is situated near the Hartbeespoort Dam, approximately 33 km (22 miles) west of Pretoria, on the farm that once belonged to Gustav Preller. It was the location where South Africa's atomic bombs were developed, constructed and subsequently stored during the 1980s.
The South African Nuclear Energy Corporation (NECSA) was established as a public company by the Republic of South Africa in 1999.
An accident at the Pelindaba research facility exposed workers to radiation. Harold Daniels and several others died from radiation burns and cancers related to the exposure.
Leak in 2009
On 16 March 2009, a leak of radioactive gases from Pelindaba was reported by NECSA. Abnormal levels of gamma radiation associated with xenon and krypton gases were detected, causing an emergency to be declared. Members of staff were evacuated.
Armed attack on the facility
Shortly after midnight on 8 November 2007, four armed men entered the facility and headed towards a control room in the eastern block. According to the South African Nuclear Energy Corporation (NECSA), the state-owned entity that runs the facility, the four "technically sophisticated criminals" deactivated several layers of security, including a 10,000-volt electrical fence, suggesting insider knowledge of the system. An off-duty emergency services officer, who was shot by the men after a brief struggle, triggered an alarm, alerting a nearby police station. The four attackers escaped the facility by the same way they had entered after 45 minutes alone in the compound. Though their images were captured on closed-circuit television, they were not detected by security officers because nobody was monitoring the cameras at the time. On 16 November, three suspects, between the ages of 17 and 28, were arrested by local police in connection with the incident but were later released. In response to the attack, NECSA suspended six Pelindaba security personnel, including the general manager of security and promised an "internal investigation which will cover culpability, negligence and improvements of Security Systems." 
- Treaty of Pelindaba - African Nuclear Weapons Free Zone Treaty
- South Africa and weapons of mass destruction