DOE radiological calibrations intercomparison program: Results of fiscal year 1988
Calibration measurements for personnel dosimetry purposes must be both accurate and consistent with national standards. In order to satisfy these requirements, the following methods are usually employed. In one case, a radiation source is sent to the National Institute of Standards and Technology (NIST), formerly the National Bureau of Standards, for calibration and is returned to the laboratory to be used as a local standard. Another method involves the calibration of an instrument, such as an ionization chamber, by NIST. After calibration, this instrument is then used to measure the exposure rate delivered by radiation sources at the laboratory. Such calibrations by NIST are essential, but they do not provide a complete check on the quality of the calibrations that are carried out by the individual laboratory. Additional measurements are necessary to assure the quality of such measurements. When laboratory staff are asked to carry our measurements with calibrated instruments and report results for evaluation, they are participating in a measurement quality assurance (MQA) program. Such a program tests not only the quality of the equipment but also the ability of the staff to correctly use and interpret the results obtained with the equipment. The NIST operates an MQA program with a selected number of calibration laboratories. Pacific Northwest Laboratory (PNL) participates in this MQA program even though NIST test only x-ray and gamma-ray measurements. The US Department of Energy (DOE) intercomparison program was designed specifically to include x-ray, gamma-ray, beta, and neutron calibrations for personnel dosimetry purposes. This program serves a need that is not being met by NIST, and it provides documentation of the accuracy and uniformity of the radiological calibrations carried out in DOE facilities. 7 refs., 3 figs., 6 tabs.
- Research Organization:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Sponsoring Organization:
- DOE/EH
- DOE Contract Number:
- AC06-76RL01830
- OSTI ID:
- 5707924
- Report Number(s):
- PNL-6996; ON: DE90000911
- Country of Publication:
- United States
- Language:
- English
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46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
61 RADIATION PROTECTION AND DOSIMETRY
CALIBRATION STANDARDS
INTERLABORATORY COMPARISONS
MEASURING INSTRUMENTS
CALIBRATION
ACCURACY
BATTELLE PACIFIC NORTHWEST LABORATORIES
BETA SOURCES
CESIUM 137
COBALT 60
DOCUMENTATION
DOSE EQUIVALENTS
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INTERNAL CONVERSION RADIOISOTOPES
ISOMERIC TRANSITION ISOTOPES
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MINUTES LIVING RADIOISOTOPES
NATIONAL ORGANIZATIONS
NUCLEI
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
PARTICLE SOURCES
RADIATION SOURCES
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655002* - Medical Physics- Radiation Source Calibration & Standardization
440100 - Radiation Instrumentation
655003 - Medical Physics- Dosimetry