Zaporizzhya NPS

Date: 2015-10-07; view: 446.

IR-100

RBMK

1.The RBMK channel-type uranium-graphite reactor operates as a single-loop system.

2.The steam produces in the core is directly fed to the turbine.

3.The reactor is located in a concrete well.

4.It is made of vertical graphite columns with central holes to house process channels and special channels.

5.Process channels house fuel elements and provide coolant flow.

6.Special channels house control and safety rods and also means of technological control system.

7.The core contains fuel cassettes.

8.Each cassette contains two fuel assemblies, each assembly consisting of 18 fuel elements.

9.Fuel elements are formed of fuel pellets enclosed in hermetical zirconium cans.

1. IR-100 is a research reactor used for training engineers for Ukrainian NPSs.

2. It is also employed for experiments and research work.

3. IR-100 is a water-cooled and water-moderated reactor with thermal output of 200 kWt.

4. Its core is a hexahedral prism filled with UO2 enriched with U235.

5. The enrichment of fresh fuel is 10 per cent.

6. The fuel assembly is made of 7 fuel rods.

7. The cooling system has two circuits, primary and secondary, and two heat exchangers.

8. The pressure in the secondary circuit is 2-3 times greater than in the primary one to prevent contamination in case of an integrity failure.

9. Experimental facilities are the heat tower, three horizontal channels, 8 vertical channels, one central experimental channel, the recoil box and pneumatic post.

10. IR-100 was put into operation in 1974.

1. Zaporizzhya NPS is situated in Zaporizzhya region in Ukraine, not far from the operating Zaporizzhya thermal power station.

2. That power station was designed to supply power to the southern regions of Ukraine.

3. The power station has six power units with а unit capacity of 1000 МW.

4. The construction of Zaporizzhya NPS was commenced in 1979.

5. After commissioning of the second phase in 1990 the capacity of the power station reached 6000 MW.

6. The enclosure of the reactor building is divided into confined access and free access zones.

7. The free access zone houses the reliable auxiliary power supply system, control rooms, ventilation system, emergency feed pumps with storage tanks and steam generator safety valves.

8. The confined access zone houses the systems and equipment operating in contact with the radioactive water of the primary circuit.

9. The primary coolant circuit comprises the reactor and four circulation loops, each consisting of а main coolant pump, а steam generator and austenite-steel piping.

10. WWER-1000 reactor is а shell-type pressurized water one, water being used here as coolant and moderator.

11. The secondary coolant circuit is non-radioactive, consisting of steam-producing part of steam generators, а turbine and the auxiliaries of the turbine room.