Nuclear power

1Switchboards and control rooms

The problem

Switchboards, UPS units and control equipment must keep working after an earthquake too, above all in nuclear power plants.

What we fit

Qualified seismic plinths (IEEE 344, as at Krško) and isolators for containers and equipment rooms.

Typical choice

Non-Raised Floor Plinth, seismic plinth for racks100–1,500 kg · 4–5 HzContainer Pad Seismic Vibration Isolator100–10,000 kg · 3–9 Hz

Proven in power plants and substations: Central nuclear de Krško (2021), Central nuclear de Chernóbil (2018), seismic plinths, ieee 344 test.

The final choice depends on the load per mount, the speed and the environment. An engineer confirms it with you.

2Pumps and pumping stations

The problem

Feed, circulation or crude-oil pumps make the ground and the pipework of the whole plant vibrate.

What we fit

A floating slab under the whole pumping station or restrained isolators under each pump.

Typical choice

Anti-vibration floating slab1–4.5 HzMachine levelling feet25–7,000 kg · 15 HzEqual-frequency vibration mount4–3,125 kg · 2–8 HzDouble springs with retention80–1,460 kg · 7–9 Hz

The final choice depends on the load per mount, the speed and the environment. An engineer confirms it with you.

3Cooling

The problem

Chillers, cooling towers and heat exchangers have fans and compressors that vibrate on the structure.

What we fit

Double springs with restraint, which isolate the equipment and hold it in wind or earthquakes.

Typical choice

Spring isolator390–8,760 kg · 3–9 HzDouble springs with retention80–1,460 kg · 7–9 Hz

The final choice depends on the load per mount, the speed and the environment. An engineer confirms it with you.

4Transformers and substation

The problem

A transformer hums continuously at 100 Hz. The hum passes through the floor to the control room and nearby buildings.

What we fit

A floating slab under the transformer or transformer mounts under its base, as in Endesa's substations.

Typical choice

Anti-vibration floating slab1–4.5 HzSpring isolator390–8,760 kg · 3–9 Hz

The final choice depends on the load per mount, the speed and the environment. An engineer confirms it with you.