Development of simulated-gas standards

Area of Science:

• Environmental Science
• Nuclear Engineering
• Analytical Chemistry

Background:

• Nuclear power plants require continuous air monitoring for safety.
• Existing multigamma simulated-gas standards have limitations in preparation and validation.
• Accurate calibration of monitoring equipment is crucial for reliable environmental surveillance.

Purpose of the Study:

• To develop an improved multigamma simulated-gas standard for nuclear power plant environmental monitoring.
• To simplify the preparation and validation process of simulated-gas standards.
• To investigate the stability and self-attenuation properties of the new standard.

Main Methods:

• Gravimetric spiking of a matrix with a standardized multigamma radioactive solution for preparation.
• Calculation of self-attenuation correction factors for low gamma-ray energies.
• Experimental studies on the adherence stability of the dried radioactive residue to the matrix.

Main Results:

• A novel, easily prepared simulated-gas standard was successfully developed.
• The new standard does not require validation against actual gas standards.
• Self-attenuation correction factors for low-energy gamma rays were determined.
• The stability of the radioactive residue adherence to the matrix was confirmed.

Conclusions:

• The developed multigamma simulated-gas standard offers a practical and efficient alternative for nuclear power plant air monitoring.
• Gravimetric preparation simplifies the process and reduces the need for complex validation procedures.
• The standard demonstrates good stability and provides accurate self-attenuation correction, enhancing monitoring reliability.