Refueling Water Storage Tank Re-coat Project

Increase worker safety: Develop an air treatment system (including air conditioning) to reduce the level of personnel heat stress.
In addition to the tank entry hazards, the system had to control temperature and humidity as well as contain high levels of alpha loose-surface contamination.
Primary design objectives had to support hydro lasing, grit blasting, cleanup, and re-coating.
Containment of process-generated contaminants: The HEPA system had to provide sufficient flow to maintain capture velocity for containment of radiological contaminants at the tank entry/egress points.
Humidity Controls: Dehumidification was required to prevent surface oxidation (flash rust) during the coating-removal process.

RPS designed and manufactured a 6,000 cfm HEPA ventilation skid that was integrated with a 35 ton air conditioning system and compatible dehumidification unit with interconnecting ducting, dampers, and fittings.
This RPS-designed system performed at or above the design parameters in every respect and led to the successful completion of the RWST re-coating project.
Alpha contamination was controlled and there were no contamination releases or personnel-contamination events.