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The Nuclear Island takes shape
An accumulator for Reactor Unit 1 being lowered into position. Its function is for the storage of borated cooling water to be supplied to the primary loops in the unlikely event of loss of coolant; this is part of the Multiple Safety System of the
Guangdong Nuclear Power Station.
The huge circular Containment Building for Reactor Unit 1 has now almost reached its full height. The 6mm thick inner steel liner is at the elevation where its dome- shaped roof will be attached. The dome is presently being fabricated on the ground next to the building; it will be lifted and fixed in place later this year. The 90cm thick reinforced and post-tensioned concrete outer wall is progressing satisfactorily and is about 36 metres above ground level.
The complex interior structure of this immensely strong building is taking shape and the three Safety Injection Accumulators have been
installed after delivery from France.
Work on the Containment Building of Unit 2 has started and its inner steel liner is now about 18 metres high. Overall, progress of Unit 2 is a little ahead of schedule.
Work on ancillary buildings such as the Fuel and Nuclear Auxiliary buildings is also proceeding smoothly. Oil storage tanks for the emergency diesel generators have been put in place for both Unit 1 and Unit 2.
Construction of breakwaters
At the start of the project, a temporary sea wall was built to protect the site. This is now being extended and three permanent breakwaters are being built.
The Eastern Breakwater runs into Daya Bay for 566 metres to give protection from the prevailing wind and to provide a quay for unloading heavy equipment shipped from Europe. The quay has now been completed and is receiving the first shipments.
Two other breakwaters, protecting the water inlet channel to the Pump House and seawater intake and discharge channels, are also under construction. Massive concrete blocks, weighing from 17 to 44 tonnes, are used for these marine works. The main contractor for all these works is the Fourth Harbour Engineering Bureau of the Ministry of Communications.
The use of steel reinforcing bars at Daya Bay is far more complicated than in other construction work. Photo above shows complex arrangement of rebars within the Containment Building for Reactor Unit 1.
Work on the Conventional Island
Each Conventional Island has a 900 megawatt turbine gen- erator. The concrete frame for the Unit 1 building is complete while the pedestal for the turbine generator and the structural steel roof are nearly finished. The two overhead cranes are now in position and pre-operational tests will be carried out shortly. Work on the Unit 2 building has started.
Close by is the Pump House which provides sea water to condense the steam after it has driven the turbines. This is achieved through a totally independent cooling circuit. Construction of Unit 1 Pump House is nearly complete.
Eastern Breakwater and unloading quay, June 1989.
Progress of contractors and suppliers
Electricité de France (EdF) has assumed overall technical responsibility for building the station as well as providing engineering and project management services.
In France, Framatome is building the Pressurized Water Reactor equipment as scheduled. GEC Turbine Generators of the United Kingdom is supplying generators and associated Conventional Island equipment.
HCCM, a consortium of companies from China, Japan and France, is making satisfactory progress on the Nuclear Islands, Conventional Islands and various ancillary buildings. Since early 1988, HCCM has established an efficient and effective quality management system covering the large number of civil works activities.
A contractor from Singapore is undertaking the civil works for the on-site Training Centre which will be used in a continuing programme of training and re-training courses for the station's operating staff.
Framatome and Spie Batignolles will act as the main contractor for plant erection in the Nuclear Islands with the Twenty-third Construction Corporation of China National Nuclear Corporation acting as sub-contractor. For the Conventional Islands, Shangdong Electric Corporation will act as the main contractor for plant erection with GEC providing technical assistance. The Northeast Nuclear Power Construction Company will act as the main contractor for plant erection in ancillary buildings. Personnel from these contractors have arrived on site for preparation work.