Document: NUREG-0800
Document ID: 3c241845-034f-4f89-b12a-f51967895c13
Document Type: srp
Title: PROCESS AND EFFLUENT RADIOLOGICAL MONITORING INSTRUMENTATION
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1307/ML13071A494.pdf
Revision Date: 2023-06
Chapter: 11
Section ID: 11.5
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CFR Title: 

Content:
eleases to unrestricted areas, and instrumentation used for monitoring intersystem leakage among plant systems. In addition, the review addresses the means to monitor nonradioactive systems that could become contaminated with radioactivity through interfaces with radioactive systems. At a minimum, the review includes the following: A. The types and numbers of instruments, number of instrumentation channels, location of detectors, types and placement of radioactive check sources, sampling points, and process and effluent sampling stations. The basis for the selection of these sampling or monitoring points are compared with the general principles and criteria for obtaining valid samples of radioactive materials from liquid and gaseous process and effluent streams. The review considers the methods and materials used in gaseous and particulate sampling equipment and the guidance for sampling from ducts and stacks using the guidance of RG 4.15, and ANSI N42.18-2004 and ANSI/HPS N13.1-2011. 11.5-28 Draft Revision 6 – August 2014 B. In ensuring representative sample collection, the review compares equipment design features, layout, piping, and description of sampling methods to the guidance of RG 1.21, RG 1.143, and RG 4.15, and industry guidance of ANSI N42.18-2004 and ANSI/HPS N13.1-2011. C. The review includes an independent evaluation of radioactivity levels and radionuclide concentrations in process and effluent streams using the models and guidance of SRP Section 11.1 (NUREG-0016, “Calculation of Releases of Radioactive Materials in Gaseous and Liquid Effluents from Boiling-Water Reactors,” or NUREG-0017, “Calculation of Releases of Radioactive Materials in Gaseous and Liquid Effluents from Pressurized-Water Reactors”) and guidance of RG 1.112, “Calculation of Releases of Radioactive Materials in Gaseous and Liquid Effluent from Light-Water-Cooled Power Reactors,” in confirming the applicant’s estimates of expected radioactivity levels and