Slănic-Prahova low background calibration facility

Area of Science:

• Medical Physics
• Radiation Dosimetry
• Environmental Science

Background:

• Low background radiation environments are crucial for sensitive measurements.
• Establishing reliable calibration facilities for low-dose-rate dosimetry is essential for radiation protection.

Purpose of the Study:

• To establish and validate a calibration stand for low-dose-rate dosimetry in a reduced background environment.
• To assess the uncertainty and accuracy of dose rate measurements using this facility.

Main Methods:

• Utilized a low background radiation laboratory (2 nSv h⁻¹) for installing the calibration stand.
• Employed low activity sources of Cobalt-60, Cesium-137, and Americium-241.
• Used a calibrated AUTOMESS 6150 AD-6 dose rate meter with an external probe for measurements.

Main Results:

• The calibration stand demonstrated suitability for low-dose-rate dosimetry.
• Experimental dose rates showed good correlation with calculated values across various distances (0.3–2.0 m).
• Measurements confirmed dose rates follow an inverse squared distance law, with an overall uncertainty of approximately 3% at 95% confidence.

Conclusions:

• The Slănic-Prahova Low Background Radiation Laboratory's facility is a viable calibration stand for low-dose-rate measurements.
• The established methodology provides accurate and reliable dose rate determinations crucial for radiation safety standards.