Simplified Solutions for Activity Deposited on Moving Filter Media

Area of Science:

• Nuclear Engineering
• Environmental Monitoring
• Computational Physics

Background:

• Continuous air monitors (CAMs) are crucial for detecting airborne radioactivity in nuclear facilities.
• Existing numerical solutions for CAMs can be complex and difficult to adapt.
• Accurate assessment of particulate activity on moving filters is essential for radiation protection.

Purpose of the Study:

• To develop simplified numerical solutions for particulate activity analysis on moving filter CAMs.
• To validate the developed solutions for various airborne radioactivity scenarios.
• To compare the novel method with existing approaches.

Main Methods:

• Development of simplified numerical models for both rectangular window (RW) and circular window (CW) monitor configurations.
• Demonstration of solutions using basic airborne radioactivity cases, concentration pulses, and pressurized water reactor (PWR) coolant system leakage scenarios.
• Comparison of the simplified solutions against prior art methods.

Main Results:

• The simplified numerical solutions accurately represent particulate activity on moving filters for diverse scenarios.
• The method effectively demonstrates the impact of concentration pulses and reactor coolant system (RCS) leakage.
• The developed solutions show comparable or improved performance against existing methods.

Conclusions:

• Simplified numerical solutions provide an efficient and adaptable tool for analyzing particulate activity on moving filter CAMs.
• The method's adaptability to multiple radionuclides and varying efficiencies enhances its practical application.
• This approach facilitates easier programming and implementation in real-world monitoring systems.