This standard specifies the requirements of radiation protection and safety of source containers and instrumentation with sealed radioactive source (hereinafter referred to as sealed source) as well as the requirements of the inspection of radiation protection.
This standard is applicable to the instrumentation with sealed source and basing on particle fluence and measurement such as the level gage, densimeter, hygrometer and nuclear scale.
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding amending errors in the text) to, or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest editions of these documents are applicable. For undated references, the latest edition of the normative documents referred to applies.
GB 4075 "Sealed Radioactive Sources - General Requirements and Classification"
GB 11806 "Regulations for the Safe Transport of Radioactive Material"
GB 14052 "Radionuclide Gauges - Gauges Designed for Permanent Installation"
GB 18871 "Basic Standards for Protection against Ionizing Radiation and for the Safety of Radiation Sources"
GBZ 128 "Specifications of Individual Monitoring for Occupational External Exposure"
GBZ/T 208 "Classification of Radioactive Sources Based on Dangerous Index"
3 Terms and Definitions
The following terms and definitions are applicable to this standard.
3.1 Radioactive source container
Put sealed source at the accurate geometrical position and provide enough shield protection to make surrounding radiation level below that of containers with specified value. Source brakes controlling the on-off of primary radiation and indicators of radiant state etc. may also be arranged on source containers.
3.2 Useful beam
The radiation through the window, diaphragm and conical bore of source containers or through other shape collimators.
