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3.2.7
3.2
3.2.1
Conclusion
It is technically and operationally feasible to accommodate a nuclear power station of 2 X 900 MWe capacity in the interconnected Guangdong/Hong Kong power system in 1988/89.
The nuclear power station will be advantageous to the Hong Kong and Guangdong power systems and will be especially so if the Guangdong and Guangxi power systems are interconnected.
Selection of Equipment
Choice of Reactor Type
Pressurised Water Reactors are used in 51% of the world's existing nuclear power plants. For plants now under construction, the PWR share is increased to 64%. The standard sizes of reactor produce electrical power outputs of 600 MW (2 loop plant), 900-1000 MW (3 loop plant) and 1200-1300 MW (4 loop plant). The majority of plants now under construction have power outputs in the range 900-1300 MW.
Since the commissioning of the first PWR in 1957, over 500 reactor-years of operating experience have been obtained and there are currently 77 reactors in operation with electrical power outputs greater than 150 MW. Although there is
in a considerable variation operating performance between the various power plants, experienced utilities normally achieve capacity factors near 70% after 3 to 4 years of operation.
The current designs of PWR are the result of a steady technical advance and are based upon a wide body of experience and research work. The design philosophy at the present time is one of standardisation and attention to details in order to improve reactor performance. Although major problems such as steam generator corrosion have occurred, technical solutions to these problems are
available.
The safety of PWR plant has been examined and analysed throughout the world. The recent accident at Three Mile Island demonstrated that the present designs are capable of coping with serious accidents which are brought about by a number of combined faults. The Three Mile Island accident has however stimulated the reactor industry to consider new types of accident and to appreciate the importance of interactions between the plant and operating personnel.
reactors and
There are already 15 countries using pressurised water as a result there is wide experience available of PWR design, manufacture, construction and operation. By adopting the PWR, the Joint Venture will be able to draw on this background of technical expertise and experience.
The construction cost of a PWR plant is comparable with the cost of an equivalent BWR plant and less than the cost of equivalent AGR or CANDU plants. PWR plants are supplied by a large number of vendors. The final choice of reactor supplier can therefore be made both on technical and financial grounds.
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