Project Scope:

• Design and build a portable negative pressure chamber to control the spread of contamination while servicing the internals of a vacuum cleaner used for the pickup of radioactive particulate matter.
• Provide a bag-out port for the disposal of radioactive waste and cleaning products.
• Allow two people to work simultaneously on the vacuum cleaner from opposite sides of the chamber.
• Incorporate an onboard HEPA-filtered ventilation unit (Model SP-125A) to remove and filter air from the enclosure.  Fresh air is drawn through a gravity damper inlet above the access door.
• Include threaded through-wall fittings for client-installed high-pressure spray rinsing wands (by others).
• Perforated S/S work surface and gravity sump for liquid evacuation.

Description:

• T304 stainless steel shell, ports for high pressure spray, single point 110V power feed, and convenience receptacles.
• Components are placed on a perforated S/S work surface.
• Gasket-sealed door provides access for placement of components into the enclosure.
• Windows are mounted in channel-rubber gasket.
• 125 CFM HEPA-filtered ventilation unit maintains negative pressure within the enclosure.
• Make-up inlet ventilation air louvre with backdraft damper and internal spray shield.
• Exterior-mounted fluorescent fixture shines through light port in roof of enclosure.
• Drum pass port (vertical) with hinged gravity-positioned cover.
• Unit is mounted on locking casters for ease of movement.
• The internal corners are coved to eliminate crud traps and facilitate cleaning.