Monitoring and measurement of radon activity in a new design of radon calibration chamber

• Published in: Radiation measurements Vol. 46; no. 8; pp. 694 - 700
• Main Authors: Heidary, S., Setayeshi, S., Ghannadi-Maragheh, M., Negarestani, A.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01-08-2011; Elsevier
• Subjects: Calibration; Chambers; Computer programs; Control and monitoring; Controllers; Detectors; Earth sciences; Earth, ocean, space; Exact sciences and technology; Geochronology; Isotope geochemistry. Geochronology; Logic; Monitoring; Radon; Radon chamber; Radon; Radon chamber; Control and monitoring; radon; interfaces; software; temperature; humidity; calibration; flow
• ISSN: 1350-4487; 1879-0925
• DOI: 10.1016/j.radmeas.2011.06.014

A new radon calibration chamber has been designed, constructed and tested to set various desired environmental parameters. The chamber is cubic with two trapezoid sides with a total volume size of 0.498 m
3.
The three parameters, temperature, humidity and flow are controlled in the range of 20–45 °C (±2 °C), 10–70% (±2.5%) and 0.2–10 m
3/min (±0.1 m
3/min) respectively. The chamber is equipped with a controllable speed centrifugal fan to achieve a desirably uniform radon flow rate. Many parts of this system are controlled and monitored with a PLC (Programmable Logic Control) and HMI (Human Monitoring Interface) software (Citect Scada). Finally a radon detector (Alpha-Guard) registers the activity parameter.