UWRCL Comprehensive Scope of Accreditation

The UW Radiation Calibration Laboratory (UWRCL) is accredited to ISO/IEC 17025:2005 by the American Association for Laboratory Accreditation (A2LA) for the all services. The UWRCL provides the highest quality and most comprehensive calibration and related services in the industry.

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Parameter / Equipment Range Best Uncertainty* (±) Technique or Reference Standard
Therapy Class Ionization Chambers

NIST calibrated reference class ionization chambers;

137Cs brachytherapy sources;

Reference class ionization chambers calibrated against NIST calibrated sources for short-lived isotopes such as 192Ir, 125I, 131Cs, and 103Pd;

NIST traceable air kerma rate for Electronic Brachytherapy Sources.

60Co Air Kerma Up to 150 cGY/min 1.5%
60Co Dose to Water Up to 150 cGy/min 1.4%
137Cs Air Kerma Up to 20 cGy/min 1.6%
X-rays 20-250 kVp 1.0%
Diagnostic Class Ionization Chambers
X-rays    
Tungsten Anode 20-250 kVp 1.9%
Molybdenum Anode 23-25 kVp 1.9%
Health Physics/Radiation Protection Ionization Chambers
60Co Air Kerma Up to 150 cGy/min 1.5%
137Cs Air Kerma Up to 150 cGy/min 1.6%
X-rays 20-250 kVp 1.9%
Well-type Ionization Chambers      (1U=1µGy/m2/hr)
HDR 192Ir Up to 50 kU 2.8%
137Cs, 131Cs, 125I, 103Pd, LDR 192Ir Up to 500U 2.4%
Electronic Brachytherapy Sources Up to5 mGy/sec 4.0%
Well-type Intravascular Ionization Chambers
90Sr Activity Up to 100 mCi 6.4% NIST traceable activity and absorbed dose to water source calibrations
90Sr Absorbed Dose Up to 200 mGy/s 15%
Radioactive Brachytherapy Sources
37Cs, 131Cs, 125I, 103Pd, LDR 192Ir Up to 500U 1.9% NIST calibrated 137Cs and 90Sr brachytherapy sources, reference class well-type ionization chambers calibrated against NIST calibrated sources for short-lived isotopes such as 192Ir, 125I, 131Cs, and 103Pd
Electrometers** Charge (25pC - 10 μC) 0.21% NIST traceable (A2LA accredited) capacitor calibration, voltage (through calibrated DMM), and period / time (through calibrated universal counters).
Current (1pA - 1000 nA) 0.21%
Non-Invasive kVp Meters
 

Diagnostic

Mammography

50 kVp - 250 kVp

23kVp - 35 kVp

1.1%

1.1%

NIST-traceable voltage divider calibration
Radiation Protection Survey Instruments
  137Cs Exposure 0.02 mR/hr - 20 R/hr 6.5% NIST-calibrated reference class ionization chamber used to calibrate the radiation beam air kerma or exposure rate
TLD, Radiochromic Film, and Artifact Irradiation 
 

60Co Air Kerma

137Cs Air Kerma

X-ray Air Kerma

 

High Energy photons (6 - 18MV) and electrons (4-16MeV)

Up to 150 cGy/min

Up to 20 cGy/min

20-250 kVp

 

Up to 2400 cGy/min

 

2.5%

2.5%

2.5%

 

2.5%

 

NIST-calibrated reference class ionization chambers calibrated in reproduced beams using replacement technique

* Best Uncertainties represent expanded uncertainties using a coverage factor of k=2 which provides a level of confidence of approximately 95%.

** The UWRCL has the capability to perform minor repairs or battery replacement for non-functioning electrometers. PLEASE CLICK HERE for more details. Please Note, Adobe Acrobat Reader version 5.0 is required to use the form. CLICK HERE to get the current version of Adobe Acrobat Reader.