A Radioiodine Detector Based on Laser Induced Fluorescence.
Abstract
A technique is described to measure airborne concentrations of I2(129) in nuclear power generation and reprocessing plants. Due to its low specific activity, long half-life, and low energy decay products, radio-counting techniques for I(129) are not practical. A laser fluorescence technique based on coincidences between a He(3)-NE(22) laser and I2(129) absorption lines is used and is shown to be sensitive to near 10 to the -12th power g per cu cm of I2(129) in a scrubbed system; at 1 atm of argon and 1 atm air the sensitivities are reduced by factors of 86 and 131.7 respectively. Possible interferences, measurements under flowing conditions, and ultimate sensitivities are discussed. An evaluation of the technique and extension to a portable, real time monitoring instrument for use in the field is given.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1977
- Accession Number
- ADA040604
Entities
People
- A. P. Baronavski
- Jim R. McDonald
Organizations
- United States Naval Research Laboratory