Document: NRC Regulatory Guide
Document ID: 96baa826-d3bb-478b-8f38-e74500f6d433
Document Type: regulatory_guide
Title: 06/2009 (Rev. 2)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML0911/ML091170109.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.21
CFR Part: 
CFR Title: 

Content:
s, and tritium) and the Refueling Water Storage Tank released 0.009 Ci of iodine, particulates, and tritium, then the Refueling Water Storage Tank would be a less-significant release point. In both of these examples the sample frequency can be adjusted to a frequency that is appropriate for that less significant release point. Samples collected from these systems for other programs (e.g., detection of primary to secondary leakage) must still be collected and analyzed at the frequencies specified by the other programs. licensed material—Means source material, special nuclear material, or byproduct material received, possessed, used, transferred, or disposed of under a general or specific license issued by the Commission. lower limit of detection (LLD)—The a priori smallest concentration of radioactive material in a sample that will yield a net count, above system background, that will be detected with 95% probability Rev. 2 of RG 1.21, Page 45 with only a 5% probability of falsely concluding that a blank observation represents a real signal (see NUREG-1301, NUREG-1302, and NUREG/CR-4007, “Lower Limit of Detection: Definition and Elaboration of a Proposed Position for Radiological Effluent and Environmental Measurements,” issued September 1984 (Ref.51). maximum individual—Individuals characterized as maximum with regard to food consumption, occupancy, and other usage of the region in the vicinity of the plant site. As such, they represent individuals with habits that are considered to be maximum reasonable deviations from the average for the population in general. Additionally, in physiological or metabolic respects, the maximum exposed individuals are assumed to have those characteristics that represent the averages for their corresponding age group in the general population. (This term typically refers to members of the public). See Regulatory Guide 1.109 for additional information.) member of the public (10 CFR 20)—Means any individual except when that