Document: NRC Regulatory Guide
Document ID: a5cfec96-8785-464b-ada8-dc4424b90606
Document Type: regulatory_guide
Title: Quality Assurance for Radiological Monitoring Programs
Source: NRC Regulatory Guide Division 4
Source URL: https://www.nrc.gov/docs/ML0630/ML063060429.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-4.15
CFR Part: 
CFR Title: 

Content:
correct. rem: The common unit for the effective or equivalent dose of radiation received by a living organism, equal to the actual dose (in rads) multiplied by a factor representing the danger of the radiation. Rem is an abbreviation for roentgen equivalent man, meaning that it measures the biological effects of ionizing radiation in humans. One rem is equal to 0.01 Sv. See SIEVERT and DOSE EQUIVALENT. replicates: Two or more ALIQUANTS of a homogenous SAMPLE whose independent measurements are used to determine the PRECISION of laboratory preparation and analytical procedures. reproducibility: The closeness of the agreement between the results of measurements of the same parameter carried out under changed conditions of measurement. A valid statement of reproducibility depends upon specification of the conditions changed. The changed conditions may include principle of measurement, method of measurement, observer (or analyst), measuring instrument, reference standard, location, conditions of use, and time. Reproducibility may be expressed quantitatively in terms of the dispersion characteristics of the results. Results are usually understood to be corrected results. required method uncertainty (uMR): METHOD UNCERTAINTY at a specified concentration. A key MEASUREMENT QUALITY OBJECTIVE. sample: (1) A portion of material selected from a larger quantity of material, or (2) a set of individual samples or measurements drawn from a population whose properties are studied to gain information about the entire population. sievert (Sv): The SI unit for the effective dose of radiation received by a living organism. It is the actual dose received (GRAYS in SI or rads in traditional units) times a factor that is larger for more dangerous forms of radiation. One Sv is 100 REM. Radiation doses are often measured in mSv. An effective dose of 1 Sv requires 1 GRAY of beta or gamma radiation, but only 0.05 Gy of alpha radiation or 0.1 Gy of neutron radiation. source, radioactive: A