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:
radioactive material) into the unrestricted area. abnormal release—The unplanned or uncontrolled emission of an effluent (i.e., containing plant-related, licensed radioactive material). accumulated radioactivity—Radioactivity from prior-year effluent releases that may still be present in the media of concern. ALARA—As Low as Reasonably Achievable ARERR—Annual Radioactive Effluent Release Report AREOR—Annual Radiological Environmental Operating Report background (radiation)—Means radiation from cosmic sources; naturally occurring radioactive material, including radon (except as a decay product of source or special nuclear material); and global fallout as it exists in the environment from the testing of nuclear explosive devices and from past nuclear accidents such as Chernobyl that contribute to background radiation and are not under the control of the licensee. Background radiation does not include radiation from source, byproduct, or special nuclear materials regulated by the Commission. batch release—The release of liquid (radioactive) wastes of a discrete volume or the release of a tank or purge of radioactive gases into the site environs. channel check—The qualitative assessment of channel behavior during operation by observation. This determination shall include, where possible, comparison of the channel indication and/or status with other indications and/or status derived from independent instrument channels measuring the same parameter. channel operational test—A channel operational test shall be the injection of a simulated signal into the channel as close to the sensor as practicable to verify operability of alarm, interlock and/or trip functions. The channel operational test shall include adjustments, as necessary, of the alarm, interlock, and/or trip setpoints such that the setpoints are within the required range and accuracy. continuous release—An essentially uninterrupted release of gaseous or liquid effluent for extended periods