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:
. F. Use the shortest possible sample lines in minimizing the volume of process fluid taken from containment process, system processes, and effluent streams. G. For inline radiation monitoring, design should provide backup provisions for grab sampling under an expected range of radiological conditions and provide the means to protect personnel from excessive radiation levels and airborne concentrations at sampling stations. 11.5-20 Draft Revision 6 – August 2014 H. Verify that specifically identified radioactive release points have provisions for automatic termination or rerouting of releases when exceeding predetermined alarm levels. I. Confirm that the design allows detectors to be replaced or decontaminated without opening the boundary of the process system or without losing the capability of isolating the system or diverting effluents to tanks or standby treatment systems (as appropriate). J. When two or more radiation monitoring systems are used for accident monitoring on a single discharge point or process stream, confirm that differences in instrumentation response characteristics are described over their expected overlapping operational ranges for noble gases, particulates, and radioiodines. K. Confirm that proposed instrumentation calibration methods consider whether instrumentation responses are expected to change given that radionuclide distributions may vary with the operating status of the plant, such as during normal operation, AOOs, and accident and post-accident conditions. If the provisions do not address post-accident sampling, the reviewer should refer instead to the “Notice of Availability for Referencing in License Amendment Applications Model Safety Evaluation on Technical Specification Improvement to Eliminate Requirements on Post-Accident Sampling Systems using the Consolidated Line Item Improvement Process.” Under this notice, the applicant should address the following: A. Describe contingency plans for obtaining and analyzing highly