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:
29, “Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications” (Ref. 48)); however, after rounding has been completed, values should be reported in the ARERR in a three-digit exponential format. Measurements should be reported for positive values. Some radionuclides that are detected in a year may not be detected in all quarters. If results are determined to be below detectable levels for an entire quarter, the table entry should include a suitable designation (e.g., N/D and an accompanying footnote) to denote that measurements were performed but no activity was detected. The format specified in Revision 2 of this regulatory guide differs slightly from that specified in Revision 1 of Regulatory Guide 1.21. The format and content as specified in Revision 2 are one acceptable method of reporting the data. Other formats may be used (e.g., some tables may be combined) as long as the specified content is satisfied (e.g., quarterly totals and annual totals by each release category). All plants are encouraged to use the format listed below to maximize consistency in data reporting. This format is designed to be consistent with some commonly used electronic-data-reporting software packages. Consistency aids review by members of the public and allows easier industry-wide comparisons of the data. 8.1 Gaseous Effluents The quarterly and annual sums of all radionuclides discharged in gaseous effluents (i.e., routine and abnormal discharges, continuous, and batch) should be reported in a format similar to that of Tables A-1A through A-1F in Appendix A to this regulatory guide. The data should then be further summarized and reported in the format of Table A-1. Additional information on each of these tables is provided below. Table A-1, “Gaseous Effluents - Summation of All Discharges,” contains a summation of all gaseous effluent discharges from all release points and all modes of release. The data are subdivided by quarter and year