Table of Contents
PPT Slide
Measurement Overview
Units of Measurement
pCi/L or Working Level? Depends on Sampling Mechanics
Uranium - 238 Decay Series
What does the Lab look for? Radon
What does the Lab look for? Radon Decay Products (WL)
Thoron (Radon 220) Gas Measurement Interference
Time Characteristics of Sampling Methods
Passive Integrating Radon Devices
Activated Charcoal Devices (AC)
Activated Charcoal Device Examples
Deployment
Activated Charcoal Devices Samples Radon, Results in pCi/L
Open Face vs. Diffusion Barrier
What does the Lab see? Activated Charcoal
How Lab Analyzes Activated Charcoal Devices
Practical Concerns About Activated Charcoal Devices
Advantages of Activated Charcoal Devices
Disadvantages of Activated Charcoal Devices
Quality Control Considerations for Charcoal Devices
Alpha Track Detectors
What does the Lab see? Alpha Track Detectors
Types of Alpha Track Devices
Alpha Track Devices Measure Radon, Results in pCi/L
Characteristics of Alpha Track Detectors
Advantages of Alpha Track Devices
Disadvantages of Alpha Track Detectors
How to Increase Precision of an Alpha Track Detector
Quality Control Considerations for Alpha Track Detectors
Electret Ion Chamber (EC)
Theory of EC Operation
Theory of EC Operation (continued…)
Measuring Electret Voltages
Electret Ion Chamber Measurement Periods
Types of Electret Ion Chambers
Characteristics of ECs
Advantages of ECs
Disadvantages of ECs
Quality Control Considerations for ECs
Charcoal Liquid Scintillation Device LS
Charcoal Liquid Scintillation (LS) Description
Theory of LS Operation
Characteristics of LS Devices
Advantages of LS Devices
Disadvantages of LS Devices
Quality Control Considerations for LS Devices
Grab and/or Sniffing Radon Devices
“Sniffing”
Radon Sniffing Devices
Continuous Radon Monitors (CR)
Theory of Operation of Continuous Radon Monitors (CR)
Generic Continuous Radon Monitor in Active or “Sniffing” Mode
Generic Continuous Radon Monitor in Passive Mode
What is Used to Measure the Alphas?
Continuous Radon Monitor Pulsed Ion Chamber
Pulsed Ion Chamber
Continuous Radon Monitor (CR) Solid State Silicon Detector
Solid State Detector Example
Practical Concerns About Continuous Radon Monitors
Practical Concerns About Continuous Radon Monitors (continued…)
Advantages of Continuous Radon Monitors
Disadvantages of Continuous Radon Monitors
Quality Control Considerations for Continuous Radon Monitors
Examples of Continuous Working Level Meters
Continuous Working Level Meter
Continuous Working Level Meter
Practical Considerations for Continuous Working Level Devices
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