Document: NUREG-0800
Document ID: 8536691d-4254-4c01-a5ec-aa9dee960958
Document Type: srp
Title: PROCESS AND EFFLUENT RADIOLOGICAL MONITORING INSTRUMENTATION
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1007/ML100740509.pdf
Revision Date: 2023-06
Chapter: 11
Section ID: 11.5
CFR Part: 
CFR Title: 

Content:
s SREC, ODCM, and/or PCP should indicate sampling frequencies and required analyses. B. Provisions should be made for the necessary instrumentation and facilities to perform gross beta-gamma and gross alpha measurements, isotopic or radionuclide-specific analyses, and other routine analyses in conformance with RGs 1.21, 1.33, and 4.15. C. Provisions should be made to perform routine instrument calibration, maintenance, and inspections in conformance with RGs 4.15 and 1.33. Instrumentation calibration procedures should consider whether instrumentation response is expected to change given that radionuclide distributions may vary with the operating status of the plant (i.e., normal operation, AOOs, and post- accident conditions). The plant’s SREC, ODCM, and/or PCP should indicate the frequency of such actions. Provisions should also be made to replace or decontaminate instrumentation or sampling equipment without opening the process system or losing the capability of isolating the effluent stream. D. Isolation valves, dampers, or diversion valves with automatic control features should fail in the closed or safe position. The plant’s SREC, ODCM, and/or PCP should establish setpoints for actuation of automatic control features initiating actuation of isolation valves, dampers, or diversion valves. The bases for establishing instrumentation alarm or system activation setpoints should be provided, taking into consideration the following: i. For liquid effluents, in-plant effluent dilution factors and dilution factors beyond the point of discharge to the site boundary and nearest offsite dose receptors ii. For gaseous and particulate effluents from plant stacks and building vents, atmospheric dispersion (χ/Q) and deposition (D/Q) factors to the site boundary and offsite dose receptors E. Non-ESF instrumentation provisions for automatic termination or diversion of releases should conform to the design guidance contained in Appendix 11.5-A. SRP Sections 7.6 and 13.3