Document: NUREG-0800
Document ID: e459fbaa-1cf6-4054-a83a-500a6895feaf
Document Type: srp
Title: PROCESS AND EFFLUENT RADIOLOGICAL MONITORING INSTRUMENTATION AND
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052350110.pdf
Revision Date: 2023-06
Chapter: 11
Section ID: 11.5
CFR Part: 
CFR Title: 

Content:
unctions. If the DBA analysis noted above shows that the actuation of an engineered safety feature (ESF) system is required to mitigate the consequences of a DBA, and that a signal from a radiological effluent monitor is necessary to actuate the ESF system, then the monitor should be designed and qualified to the design and quality assurance criteria applicable to the ESF system. Conversely, if an automatically functioning device or system is used to reduce radioactive releases to assure maintaining offsite doses within the limits of the plant technical specifications (i.e., not for the purpose of mitigating the con- sequences of a DBA), then a monitor providing the actuation signal should be designed and qualified-to criteria consistent with those of the actuated system. This appendix does not establish, *nor does it change in any manner, the design and quality assurance criteria established elsewhere for ESF or ESF-related systems or monitors. The design guidance set forth in this Appendix provides reasonable assurance that monitors used to provide initiation signals for actuation of systems to control the release of radioactive materials in effluents, but not required to mitigate the consequences of a DBA, are designed, constructed, installed, tested, and maintained on a level commensurate with their intended function. This Appendix sets forth minimum requirements and is not intended to prohibit the implementation of equivalent design codes, standards, or quality assurance measures other than those indicated herein. 11.5-14 Rev. 1 - July 1981 B. Definitions Radiological Effluent Monitor: A device which removes a representative sample from the effluent stream, detects and quantitatively measures the radioactive materials present in the sample, discharges the sampled medium back to the effluent stream, and transmits the measurement data to a central point. Monitoring System: A system consisting of one or more remote monitors, a centrally located cabinet or console