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:
, effluents discharged to unrestricted areas, 2. document information in a format consistent with Table A-6 and Regulatory Position 8.5, 3. provide advance indication of potential future discharges to unrestricted areas (to ensure releases are planned and monitored before discharge), 4. demonstrate that significant residual radioactivity has not migrated off site to an unrestricted area in the annual reporting interval, and 5. communicate pertinent information to the NRC. 4. Quality Assurance 4.1 Regulatory Guidance A range of QC checks and tests should be applied to the analytical process. Regulatory Guide 4.15, Revisions 1 and 2, describe the QA program activities for ensuring that radioactive effluent monitoring systems and operational programs meet their intended purpose. Each licensee’s licensing basis determines the applicability of Revision 1 or Revision 2. Licensees with programs in operation before the issuance of Regulatory Guide 4.15, Revision 2, may rely exclusively on Revision 1. Regulatory Guide 4.15, Revision 2, contains guidance on determining appropriate sensitivity levels for analytical instrumentation based on data quality objectives (DQOs). The use of DQOs may provide a better technical basis for determining sensitivity levels (LLDs) than the use of the default values supplied in NUREG-1301 and NUREG-1302. A combination approach (using both Revision 1 and Revision 2 of Regulatory Guide 4.15) can be used to determine appropriate sensitivity levels (LLDs) different (i.e., higher or numerically larger) than those listed in NUREG-1301 and NUREG-1302. Rev. 2 of RG 1.21, Page 24 4.2 Quality Control Checks QC checks of laboratory instrumentation should be conducted daily or before use, and background variations should be monitored at regular intervals to demonstrate that a given instrument is in working condition and functioning properly. QC records should include results of routine tests and checks, background data, calibrations, and all routine