Document: NRC Regulatory Guide
Document ID: 377c2606-4b7c-4c7f-997d-37aed1680452
Document Type: regulatory_guide
Title: Performance, Testing, and Procedural Specifications for Thermoluminescence Dosimetry: Environmental Applications + HISTORY - HISTORY 10/2018 – DG-4019 , Proposed Revision 2 11/2014 – Periodic Review of Revision 1 – Revise (Rev. 2)
Source: NRC Regulatory Guide Division 4
Source URL: https://www.nrc.gov/docs/ML1808/ML18087A169.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-4.13
CFR Part: 
CFR Title: 

Content:
d on a dosimeter before and after field deployment. Extraneous dose is due to radiation sources other than those at the field monitoring location, such as natural background (when the dosimeter is not deployed), and dose received from manmade sources in transit such as medical isotopes or facility sources such as nitrogen-16 (N-16) shine when the dosimeter is not deployed. To determine the field dose, the extraneous dose is subtracted from the gross field dosimeter. It should be recognized that facilities using passive environmental dosimeters such as TLDs and OSLs for environmental measurements may not be able to measure very low doses below the minimum detectable dose. In those situations additional calculations or measurements may be performed by the licensees. Harmonization with International Standards The NRC has a goal of harmonizing its guidance with international standards, to the extent practical. The International Commission on Radiological Protection and the International Atomic Energy Agency have issued a significant number of standards, guidance, and technical documents, and recommendations that address good practices in most aspects of radiation protection. The NRC encourages licensees to consult these international documents noted throughout this guide and to implement the good practices, where applicable. The International Electrotechnical Commission (IEC) issued international standard IEC 62387:2012, “Radiation Protection Instrumentation—Passive Integrating Dosimetry Systems for Personal and Environmental Monitoring of Photon and Beta Radiation” (Ref. 16). ANSI N13.37-2014 and RG 4.13, Revision 2, are generally consistent with the IEC standard for dosimetry system performance specifications and complement and supplement the technical guidance in IEC 62387. However, although the performance criteria are generally comparable, by focusing specifically on passive environmental monitoring dosimetry systems, the ANSI/HPS N13.37-2014 testing approach