Document: NUREG-0800
Document ID: 66e7af3b-21c0-444f-8737-0830bb176eba
Document Type: srp
Title: PROCESS AND EFFLUENT RADIOLOGICAL MONITORING INSTRUMENTATION
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1502/ML15029A182.pdf
Revision Date: 2023-06
Chapter: 11
Section ID: 11.5
CFR Part: 
CFR Title: 

Content:
Part 20 regulations, as identified by the applicant. A. The gaseous and liquid process streams or effluent release points should be monitored and sampled according to Tables 1 and 2 of this SRP. Other process monitoring and sampling systems may be added beyond those listed in either table, if not presented elsewhere in the application. Among others, such radiation monitoring systems may include those used on main steam lines, for RCS leakage detection in containment atmospheres, in control room air intakes, or those used for accident monitoring and sampling. B. Liquid waste and gaseous waste (contained in tanks) should be sampled on a batch basis before their release using the guidance of RG 1.21. Open structures, such as turbine buildings or atmospheric vents for liquid waste tanks containing treated or processed liquid waste and located outside of buildings, do not require continuous gaseous effluent monitors but the potential for releases and estimates of such releases should be evaluated and documented by other means. For liquid and gaseous effluents that cannot be easily monitored or sampled on a batch basis, one of the following representative sampling methods should be provided: i. Use of a continuous proportioning sampling system, with at least two sample collection tanks. The system should be designed to collect a sample at a fixed ratio established between the sample collection flow rate and the effluent stream discharge flow rate. ii. Use of a periodic automatic grab sampling system, with at least two sample collection tanks. The system should be designed to collect a sample at a fixed volume established at a rate that is proportional to the effluent stream discharge flow rate. For radioactive materials, other than noble gases in gaseous effluents, a continuous sampling system should be used with replaceable particulate filters (fixed or moving) and radioiodine absorber cartridges. The system 11.5-17 Revision 6 – January 2016 should be designed to