Daya Bay Nuclear Power Plant
|Daya Bay Nuclear Power Plant|
Daya Bay nuclear power plant
|Country||People's Republic of China|
|Location||Longgang District, Shenzhen, Guangdong|
|Commission date||Unit 1: August 31, 1993
Unit 2: February 2, 1994
|Operator(s)||Guangdong Nuclear Power Joint Venture Company (GNPJVC)|
|Nuclear power station|
|Reactor type||PWR - CPR-1000 (M310)|
|Reactor supplier||China Guangdong Nuclear Power Group|
|Units operational||2 x 944 MWe (net)
2 x 984 MWe (gross)
Daya Bay Nuclear Power Plant (Chinese: 大亚湾核电站; pinyin: Dàyàwān Hédiànzhàn) is a nuclear power plant located on Daya Bay in Longgang District, Shenzhen, Guangdong, China, north east of Hong Kong. Daya Bay has two 944 MWe PWR nuclear reactors based on the Framatone ANP French 900 MWe three cooling loop design, which started commercial operation in 1993 and 1994.
Although located within Guangdong Province, in 1985 the building of Daya Bay nuclear power plant incited controversies and raised objections from prominent politicians in the neighboring Hong Kong, such as Martin Lee and Szeto Wah, legislative councilors, district board members. A million people, or one fifth of Hong Kong's population, signed a petition opposing nuclear power. Over a hundred community groups dealt with the construction topics with the opposition focusing on environmental issues and the rights of Hong Kong residents.
Unit 1 began power operations on August 31, 1993, and Unit 2 began power operations on February 2, 1994. The reactors were designed and built by the French National Company, Framatome, with Chinese participation. Daya Bay is 25% owned by Hong Kong-listed CLP Holdings, which buys about 70% of the plant's output to supply Hong Kong's power needs.
On June 16, 2010 Radio Free Asia informed that there was a leak in one of the fuel tubes. Officials denied this information stating that "Daya Bay's two reactor units are functioning safely and stably. There has been no radioactive leak". Radio Free Asia quoted an unidentified expert, saying that radioactive Iodine had been released. It also claimed that the incident had not been initially reported to the government, but was kept secret for some time. The New York Times reported differently, quoting one of the shareholders of the plant, China Light & Power (CLP), a Hong Kong-based utility, that the government nuclear safety watchdog in both mainland China and Hong Kong were notified and briefed. CLP said in a statement that the leak was small and fell below international standards requiring reporting as a safety issue. No radioactive monitoring stations in Hong Kong detected any rise in radioactivity. Mainland news outlets also quoted officials explaining the situation, which was under normal operation conditions and fell below international standards for reporting.
The plants are named Guangdong-1 and Guangdong-2 in the IAEA PRIS database.
Missing of 316 steel reinforcing bars
On 9 October 1987, the Legislative Council task force was informed that 316 steel reinforcing bars were missing from the the reactor platform of Unit 1 . There should be 8080 bars in the whole infrastructure and specifically 576 bars in the reactor platform of Unit 1.
The incident was actually discovered and concealed by the company in September. It was disclosed by Hong Kong local newspaper later in October. Company official explained that the incident was deal to a "wrong perception" of architectural drawings. After the concrete foundation was built, it didn't match the specifications.
Pro-Beijing newspaper revealed the so-called remedial work. Extra reinforcement would be applied on the second level of concrete for the shortfall on the first of the five layers. It would not be a problem as there were altogether more than 8000 bars, only 2% of them were missing. A Hong Kong Legislative Councillor, Jackie Chan, who was also a civil engineer, criticised this saying. Steel bars at different locations bear different loads. A missing 316 missing bars from the reactor platform was 55% of the total 576 bars. It was a serious error in the proportion of missing.
In April 2011, Daya Bay Power Plant won an unprecedented four out of six awards in the annual nuclear power plant safety competition held by EDF Energy.
"Everyone was shocked by Daya Bay's figures, especially for repairs and maintenance," said Liu Changshen, General Manager of Daya Bay Nuclear Power Company. "We stood at 19.7 days last year. France has many reactors - their record is more than 23.[clarification needed] Second is our non-stop operation - all our reactors are in use simultaneously for 6 months, so overall its 3,000 days."
The Daya Bay Nuclear Power Plant also stands out from the other 63 reactors[clarification needed] as its staff are exposed to a minimal amount of radiation - only 0.8 millisieverts. That's equivalent to the exposure of a fraction of an X-ray (400 times less).
- Daya Bay Reactor Neutrino Experiment
- Ling Ao Nuclear Power Plant
- Nuclear power in China
- 2011 Huizhou refinery explosion incident
- Nuclear energy in Hong Kong
- "Nuclear Power Reactor Details - GUANGDONG 1". Power Reactor Information System (PRIS). International Atomic Energy Agency. Retrieved 2010-07-18.
- "Fuel loading starts at new Chinese reactor". World Nuclear News. 22 April 2010. Retrieved 18 July 2010.
- "China, People's Republic of: Nuclear Power Reactors". PRIS database. International Atomic Energy Agency. Retrieved 18 July 2010.
- China nuclear firm denies leak, admits tube cracks
- Bradsher, Keith (June 15, 2010). "Chinese Nuclear Plant Experienced a Small Leak Last Month, a Stakeholder Says". The New York Times. Retrieved 2010-07-18.
- 亞洲電視 (October 9, 2011). "當年今日之1987年10月9日大亞灣安全再次喚起人們關注".
- Journal of Commerce (October 13, 1987). "CHINA TO RESUME WORK ON DAYA BAY NUCLEAR PLANT".
- Gallagher, Michael C. (October 1991). "Hong Kong fears Chinese Chernobyl". Bulletin of the Atomic Scientists (SAGE Publications for the Bulletin of the Atomic Scientists) 47 (8): 9. Retrieved 15 January 2015.
- Hong Kong Nuclear Investment Co. Ltd (Flash Player required)
- Daya Bay Reactor Neutrino Experiment Website