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
CFR Part: 
CFR Title: 

Content:
alculation 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 radionuclide concentrations during normal operations and AOOs. D. For nonsafety-related systems, the review considers the interfaces of radiation monitoring instrumentation with plant systems, including provisions for automatic control features and interdependence with other types of system parameters (e.g., fluid level, valve or damper positions, and system pressure, flow rate, and temperature), using the guidance presented in this SRP section, and that of RG 1.21 and RG 4.15, ANSI N42.18-2004, and Appendix 11.5-A to this SRP section. In ensuring compliance with regulations, the review addresses the types and placement of such radiation detectors in plant systems, operational ranges and qualification of radiation or radioactivity levels in supporting the functions of radiation monitoring systems. The functional interdependence and logic in alarming and terminating or diverting process or effluent streams include: (1) in complying with doses for members of the public, (2) in complying with effluent concentration limits under 10 CFR Part 20, and (3) avoid exceeding the design objectives of Appendix I to 10 CFR Part 50. The review addresses the derivation of alarm setpoints in notifying control room operators and initiating automatic control functions. The review and evaluation of instrumentation used for the protection of plant workers are addressed in SRP Sections 12.3-12.4, 12.5, and 13.3. The review also considers design features that would prevent radioactive contamination of otherwise nonradioactive plant systems, and unmonitored and uncontrolled releases of radioactive materials in the environment. The reviewer will determine whether the design and operational features of the PERMISS comply with NRC regulations, are consistent with NRC and industry guidance on