This report has been reproduced directly from the best available copy. This chiller unit had been in service for 18 years and has never been located within an SRS radiological area. The measurements main goal is to confirm that there is no process-related contaminants present on the chiller and associated piping. To accomplish this, we have acquired 48 gamma-ray pulse height analysis spectra. Our results showed no activity above background.
All peaks identified in the spectra are due to naturally-occurring radionuclides.
We estimate the chillers are completely clean of radioactive contamination to the limits of 1 nCi total gamma-ray activity. This report will discuss the purpose of the measurements, the experimental setup, data acquisition, calculations and results, and a conclusion of the study. This chiller unit had been in service for 18 years and has never been located within an SRS radiological area. This chiller unit is approximately 20 feet long by 3 feet in diameter and contains 100-200 inner copper tubes that run the length of the unit. The outer shell of the units is made of inch carbon steel.