This week, RSCS performed our first instrument calibrations using a newly acquired J.L. Shepherd Model 81 Cs-137 open beam calibrator.  This dual source calibrator has an exposure rate range of 100 microR/h to 4 R/h, increasing the laboratory’s ability to provide open beam calibrations at higher exposure rates. By bringing the Model 81 calibrator on-line, we have significantly increased our laboratory’s throughput capacity which will have a positive impact on our turn times for gamma detection instrument calibrations.

The Model 81 calibrator is a fully automated system that is controlled remotely using a control panel to set the distance to the source along a rail assembly, apply attenuators and actuate the sources.  In addition, exposures can be set using timers to remove operator error when calibrating integrated dose instruments.  Finally, the Model 81 has several safety features that will automatically shield the sources, including an optical sensor that detects movement into the beam area, and a SCRAM button.   

RSCS developed and implemented a detailed training program on the use of the Model 81 for our laboratory technicians and have added this calibrator to our ISO/IEC 17025:2017 Scope of Accreditation provided by ANAB.  Providing accredited calibrations using the Model 81 demonstrates our on-going commitment to providing fast, cost effective and high quality instrument calibrations to our clients.