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:
activation products, (b) tritium, (c) dissolved and entrained noble gases, and (d) gross alpha. The total volume of “primary coolant waste” (typically batch mode releases) before dilution is also included. In this context, “primary coolant waste” means the higher activity waste that generally is not discharged directly, but is instead typically processed through the liquid radioactive waste treatment system before discharge. Various methods exist for calculating the dilution water flow rate. Health Physics Position HPPOS-099, “Attention to Liquid Dilution Volumes in Semiannual Radioactive Effluent Release Reports,” issued November 1984, indicates that licensees should use the total volume of dilution flow, not just that flow during periods of liquid effluent releases (Ref. 49). Licensees should include information describing how this value is calculated in either the ODCM or the ARERR. Because the primary coolant waste typically accounts for the vast majority of the radioactive liquid waste discharges, it is recommended the volume and dilution data be summarized separately from the low-activity waste described in the following paragraph. Report the total measured volume or average flow rate of waste from secondary or balance-of-plant systems (e.g., steam generator blowdown, low activity waste sumps, and auxiliary boilers). In this context, secondary or balance-of-plant waste means the typically very low activity waste that is generally not processed with the liquid radioactive waste treatment system and that collectively represents a very large volume of waste. Various methods exist for calculating the dilution water flow rate. Health Physics Position HPPOS-099 indicates that licensees should use the total volume of dilution flow, not just that volume discharged during periods of liquid effluent releases. Licensees should include information describing how this value is calculated in either the ODCM or the ARERR. Because of the potentially high volume