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▶ CPTS (Containment Post
Tensioning System) |
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The reactor containment building
must be constructed with the Prestressed concrete, which protects
the containment and the Plant’s
surrounding areas from unpredictable
and abnormal internal/external pressure on nuclear power plants.
The tendon is made of 55 strands which have a diameter of
0.5 inch low-relaxation steel wire. The strand tension is
transferred to reactor containment building as compressive
force through bearing plates. Some of the main components
include strand, wedges, bearing plate and anchorhead with
a conical hole. |
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▶ SSLP (Stainless Steel
Liner Plate) |
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Stainless Steel Liner Plate (SSLP)
is attached to the concrete water tank and coolant circuit,
which is a necessary system for replacing reactor fuel and
storing spent nuclear fuel. SSLP prevents coolant leakage
and filters foreign contaminants.
Some of the major water tanks are: Reloading Tank used in
replacing reactor fuel; Spent Nuclear Fuel Tank for storing
spent nuclear fuel and Spent Nuclear Fuel Discharge Tank.
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▶ CLP (Containment Liner
Plate) |
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Containment Liner Plate (CLP) is
installed on the inner wall of reactor containment to act
as a shelter that prevents the radioactive leakage. CLP prevents
radioactive leaks and supports reactor internals. It’s consisted
of Reactor Cavity, Floor Layer, Cylinder Shell, Dome, Equipment
Hatch, Personnel Airlock and Emergency Airlock. All concrete
surfaces of the nuclear containment building are covered with
containment liner plate.
Personnel can enter the containment building only through
the two airlocks. One is the Personnel Air Lock and the other
is Emergency Airlock, which is used only in emergencies. The
Equipment Hatch for moving equipment in and out of the containment,
and it’s used only when the plant is shut down.
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▶ Fuel Racks |
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Fuel racks are used for safe storage
of new and spent nuclear fuel. Installed under water inside
the spent fuel tank within reactor fuel building, the racks
are consisted of stainless steel and poison materials. Poison
materials control the chain reaction inside the fuel racks
by absorbing the neutrons emitted from spent nuclear fuel.
Some of the main poison materials include Borated Stainless
Steel, Boraflex and Boral.
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▶ Heat Exchanger &
tank |
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Heat exchanger and tank are very
important in maintaining the functions of nuclear power systems.
Various types of heat exchangers and tanks are installed in
the main and auxiliary systems.
Doosan has a long history of supplying many different types
of heat exchangers and tanks for a number of domestic nuclear
power plants. Doosan is recognized for its capabilities in
designing and manufacturing heat exchangers and tanks, which
the high performance and structural quality were proven through
safe operation.
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▶ GS (Gas Stripper) |
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Gas Stripper removes radioactive
gases like krypton, xenon and hydrogen included in the primary
coolant system. It can reduce the radioactive gases by 1/1,000
at minimum.
Gas strippers are designed to remove radioactive gases by
counter-flowing the steam and system fluid through the packing
inside columns.
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▶ BAC (Boric Acid Concentrator) |
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Boric Acid Concentrator (BAC) produces
high concentrate boric acid, which is supplied from the primary
injection circuit in low concentrate form. It can automatically
produce boric acid and purified water according to a selected
level of concentration.
BAC is designed to evaporate low concentrate boric acid through
heating and forced circulation by using steam and pump, so
that the acid can be divided into high concentrate boric acid
and purified water.
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