The estimated preliminary investment of the double-reactor plant is about 211 million dollar. The plant completed investment is 441 million dollar.

The plant load factor can reach 80%. The main reasons are as follows:

(1) Simplified systems;

(2) The primary circuit pressure is reduced from ISMPa to lOMPa;

(3) The component reliability is increased obviously, especially the water-water heat exchanger is more reliable than a water-steam one in the primary circuit

In calculating the amount of oil replaced, 7008 hours operation time is considered.

The double-reactor has 8 pumps and total consumption of power is 1600KW in the hot state. The third circuit feed water pump can save power consumption by 20%, but the middle circuit pumps need more power. So the saved offsets the loss. But the pressurizer, wastes disposal system, boron recycling system and high pressure injection system can save some electric power. So the electrical power used in the plant is estimated as 16.5MW. In our estimation, the oil replaced capacity is about 5.15x 105t/a.

The following is a brief plant economic analysis:

(1) Electricity and heat co-generation cost

The estimated plant operation cost is 23.5 million dollar each year. It produces 0.798 billion KWhr electricity (about 0.683 billion KW. hr for users), 3558 billion Kcal heat If the price of one million Kcal heat is considered as 2.95 dollar, the heat supply can obtain 10.5 million dollar profit Thus, the gross cost of the electricity is 0.016 dollar/KW. hr and its net cost is 0.019 dollar/KW. hr.

(2) Retrieval funds

The production cost is about 23.5 million dollar, but the cost of the oil which would be replaced every year, is about 60.6 million dollar. The difference is 37.1 million dollar. The time needed to recover capital is about 12 years. If the oil price is 176.5 dollar/t, the time is 7 only years.

(3) Thermal efficiency

The thermal efficiency of a large nuclear power plant is about 33%, while the nuclear co-generation plant is about 80%.

In summary, the small-sized nuclear co-generation plant is more economic than the coal or oil fuel co-generation plant