Fan Silencer for Nuclear Facility Ventilation

The process

Nuclear facilities hold buildings under controlled negative pressure with HEPA-filtered exhaust and conditioned supply. Fans are specified for reliability and filtration, with dampers that isolate zones.

The gas at the fan

Filtered, conditioned supply air through pre, fine and HEPA filters. The fan is selected against the filter pressure drop as it loads, at low noise.

Selection for this duty

Construction	Absorptive annular design in mild steel; stainless steel where the gas is wet or corrosive
Density at the fan	At about 22°C the gas density is close to 1.20 kg/m³, 99% of standard air. Pressure developed and power drawn fall in the same ratio, so the selection is made at this density and the motor is checked at cold start.

An absorptive silencer at the fan inlet, outlet or in the duct, cutting fan noise with minimum pressure loss. Client-stated blade types for the Fan Silencer in general: Silencer.

Industries

Other fans in nuclear facility ventilation

Fan Silencer in other processes

Information needed to select or quote

1. Gas volume and temperature. Actual flow at the inlet, normal and upset temperature, moisture.
2. Dust or pollutant. Inlet loading, particle size distribution, whether it is abrasive, sticky, hygroscopic or combustible; for gases, the species and concentration.
3. Required outlet. The emission limit or clean gas concentration the unit must meet.
4. Site. Available space and height, material of construction preferences, and how the collected material is to be discharged.