Emergency Core Cooling System Hydroaccumulators
The hydraulic accumulators of the emergency core cooling system (ECCS) are part of the reactor plant. For one power unit, four ECCS hydroaccumulators are supplied: one accumulator per each coolant loop.
AEM-Technologies manufactures ECCS accumulators for nuclear power plants loacted in Russia and abroad, including Belarusian NPP, Kursk-2 NPP, Akkuyu NPP, and Rooppur NPP.
General characteristics
The ECCS hydroaccumulator is a thick-walled vessel made of perlite steel with anti-corrosion overlay welding of the inner surface. Anti-corrosion overlay welding of the inner surface is carried out on an automatic overlay welding unit. The accumulator is filled with a boric acid water solution. In case of emergency pressure drop in the primary circuit below a certain level, the boric acid solution is automatically supplied to the reactor to stop the nuclear reaction and cooldown the reactor core.
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Life time
| 60 years |
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Design temperature
| 90 ℃ |
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Operating temperature
| 20–60 ℃ |
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Design pressure
| 6.37 MPa |
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Operating pressure
| 5.9 MPa |
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Operating media
| Nitrogen + boric acid water solution |
Dimensions
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Weight t
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Diameter m
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Height m
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Internal volume m³
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Vessel wall thickness mm
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