The plant subject to the radon gas remediation intervention.
Case Study · Private Entity (ENEL)
Radon Gas Remediation Enel Power Plant in Castrocucco
Design and implementation of the necessary interventions for radon gas remediation of the working environments inside the hydroelectric plant.
The Assignment and Radon Gas Dynamics
Evaluation of the radon problem and active measurements of the working environments.
Analysis and Monitoring
The investigations carried out during the remediation interventions consisted of active continuous measurement using Tecnavia® Radon Mapper and Sarad® Radon Scout monitors.
Previously, the client had autonomously carried out several measurements with active Canary® type dosimetry and the periodic placement of passive track dosimeters. Our instrumental detection covered the entire building, with different phases and times.
Radon Entry Dynamics
Radon spreads indoors due to the pressure difference between buildings and the soil. Warm air rising creates a slight depression in basements generating suction from the ground (chimney effect).
Client: ENEL Hydro Sud
Assignment entrusted to Misurazione Radon S.r.l. to design and carry out the necessary interventions for the complete remediation of radon gas inside the Power Plant structure.
Remediation and Technical Solutions
Subfloor Depressurization
In the absence of a traditional crawl space system, the radon gas remediation interventions were planned by exploiting the aerated debris present under the floor laying surface.
Through the use of dedicated ventilation safeguards, a state of depression in the subfloor was generated to invert the pressure flows and thus prevent the rise of radon gas inside the building.
Dynamic and Experimental Approach
The limited campaign of initial preventive measures led our technicians to a progressive strategy. Through the installation of provisional intakes, the activation of forced ventilation, and combined verifications during construction, total control of the phenomenon was gradually achieved, keeping the values firmly below the regulatory limits.
Implementation of Remediation Safeguards
The remediation campaign was conducted through the targeted installation of air derivation systems, combined with meticulous sealing of the main gas rising paths.
Extraction Systems
3 ventilation safeguards directed to the subfloor below floor level were installed, in addition to 2 located in the cavity of the perimeter wall corresponding to the meeting room and staff room of the Power Plant.
Sealing, Closing and Testing
Systematic sealing of structural joints was carried out using polyurethane foam, limiting harmful air flows. The final testing certified the total resolution of the problem.
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