Daya Bay Nuclear Power Plant

Daya Bay Nuclear Power Plant

Daya Bay nuclear power plant
Location of Daya Bay Nuclear Power Plant in China
Country People's Republic of China
Location Longgang District, Shenzhen, Guangdong
Coordinates 22°35′50″N 114°32′40″E / 22.59722°N 114.54444°E / 22.59722; 114.54444Coordinates: 22°35′50″N 114°32′40″E / 22.59722°N 114.54444°E / 22.59722; 114.54444
Status Operational
Commission date Unit 1: August 31, 1993
Unit 2: February 2, 1994
Operator(s) Guangdong Nuclear Power Joint Venture Company (GNPJVC)[1]
Nuclear power station
Reactor type PWR - CPR-1000 (M310)
Reactor supplier China Guangdong Nuclear Power Group
Power generation
Units operational 2 x 944 MWe (net)
2 x 984 MWe (gross)
Map of Daya Bay Nuclear Power Plant

Daya Bay Nuclear Power Plant (Chinese: 大亚湾核电站; pinyin: Dàyàwān Hédiànzhàn) is a nuclear power plant located in Daya Bay in Longgang District, Shenzhen, Guangdong, China; and to the 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,[2] which started commercial operation in 1993 and 1994 respectively.[3]

History

In 1985, the building of Daya Bay nuclear power plant incited controversy and led to objections from prominent politicians in nearby 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 at the time, signed a petition opposing nuclear power. Over a hundred community groups brought discussion on the construction, with the opposition primarily focusing on environmental issues and the rights of Hong Kong residents.[4]

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. The plants are named Guangdong-1 and Guangdong-2 in the IAEA PRIS database.[3]

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.[5] 75% is owned by Guangdong Nuclear Investment, wholly owned subsidiary of China General Nuclear Power Group.[6]

Incidents

Missing reinforcing bars

On 9 October 1987, the Hong Kong Legislative Council task force was informed that 316 steel reinforcing bars were missing from the reactor platform of Unit 1[7] . There should have been 8080 bars in the whole structure and 576 bars in the Unit 1 reactor platform.

The incident was discovered and concealed by the operating company in September. It was disclosed by a local Hong Kong newspaper in October. The concrete platform did not meet the specifications set. Company officials explained that the incident was due to a "mistaken perception" of the architectural drawings.

In the aftermath of the incident, steps were taken to remedy the missing reinforcing bars. Extra reinforcement would be applied on the second layer of concrete for the shortfall on the first of the five layers. A Hong Kong Legislative Councillor, Jackie Chan, who was a civil engineer by trade criticised attempts to downplay the issue which focused on the fact that "only 2%" of the total number of bars were missing. The 316 missing bars localised to the reactor platform which would have resulted in 55% reduction in the total of 576 bars[8]

The Bulletin of the Atomic Scientists reported the incident in 1991 with a title "Hong Kong fears Chinese Chernobyl".[9]

Alleged radioactive leak

On June 16, 2010 Radio Free Asia[10] 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. They also claimed the incident had not been immediately reported to the government, and 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.[11] Mainland China news outlets also quoted officials explaining the situation, which was considered under normal operation conditions and fell below international standards for reporting.

Safety

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. The Daya Bay Nuclear Power Plant also stood out as its staff are exposed to a minimal amount of radiation - only 0.8 millisieverts equivalent to 400 times less than the amount in an X-Ray[12]

See also

References

  1. ↑ "Nuclear Power Reactor Details - GUANGDONG 1". Power Reactor Information System (PRIS). International Atomic Energy Agency. Retrieved 2010-07-18.
  2. ↑ "Fuel loading starts at new Chinese reactor". World Nuclear News. 22 April 2010. Retrieved 18 July 2010.
  3. 1 2 "China, People's Republic of: Nuclear Power Reactors". PRIS database. International Atomic Energy Agency. Retrieved 18 July 2010.
  4. ↑ Asiasociety.org
  5. ↑
  6. ↑ "Business Structure". CLP Group. Retrieved 15 December 2015.
  7. ↑ 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".
  8. ↑ Journal of Commerce (October 13, 1987). "CHINA TO RESUME WORK ON DAYA BAY NUCLEAR PLANT".
  9. ↑ 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.
  10. ↑ China nuclear firm denies leak, admits tube cracks
  11. ↑ 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.
  12. ↑ http://www.bjreview.com.cn/special/2011-04/08/content_349965.htm

External links

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