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:
sses or deposition in sampling lines. D. Methods used to convert raw instrumentation readings into meaningful radiological results to identify radioactivity or radionuclide concentrations monitored or sampled for normal operations, AOOs, and postulated accidents in assessing radioactivity levels, concentrations, exposure rates, and doses in confirming compliance with NRC criteria and guidance. E. Measurements, analyses, and determinations, including the basis for the interpretation of the results of sample analyses, relying on the use of surrogate radionuclides, as easy-to-detect in accounting for the presence of hard-to-detect radionuclides when not specifically analyzed. Parallel determinations may be conducted using gross beta-gamma or alpha concentrations in inferring the concentrations of specific radionuclides. F. Descriptions of instrumentation calibration methods and procedures in confirming instrumentation response characteristics, sensitivity levels and detection limits, and detection ranges for plant-derived radionuclides expected during normal operation, AOOs, and accident conditions. Comparison of the types, levels and concentrations of radioactive materials described as the design basis of the plant to methods described for specifying the types and ranges of radiation monitoring instrumentation. When two or more radiation monitoring systems are used for accident monitoring on a single discharge point, differences in instrumentation response characteristics should be described over their expected overlapping operational ranges for noble gases, particulates, and radioiodines. G. Types and locations of annunciations and alarms and actions initiated by each type of instrumentation, and confirmation that once tripped by an alarm setpoint, the instrumentation system properly initiates and completes the expected action, such as terminating or diverting a release or process, and, if part of the design, controls in monitoring deviations of in-plant dilution and