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:
ary interconnecting cables, power supplies, pumps, motors, alarms, recorders, display panels, and other auxiliary components. Automatic Control Feature: A design feature that automatically initiates a control or protective action when exceeding a defined instrumentation alarm set-point. The set point may represent radioactivity concentration levels and release rates, or signals other than radioactivity (e.g., fluid level, valve position, and system pressure, flow rate, and temperature). The initiation of control or protective actions may rely only the presence of radioactivity or be linked to the status other plant system parameters as functional interdependence and logic in alarming and terminating or diverting process or effluent streams. Other considerations may include determining whether system logic demands that a valve or damper fail in the closed position in protecting the system from further contamination, terminating releases to the environment, or diverting process streams or effluents to appropriate treatment systems. These provisions also apply to liquid and gaseous process radiation monitoring equipment not covered by the ODCM. 11.5-56 Draft Revision 6 – August 2014 3. Design Guidance Design and QA criteria for radiological effluent monitors should be consistent with the design and QA criteria applicable to the systems actuated by a signal from the monitors. Monitors providing signals for the actuation of ESF systems should be designed and qualified to the design and QA criteria applicable to ESF systems. Criteria for ESF-related monitors are found in the appropriate sections of SRP Chapter 7. This position does not affect or modify existing criteria for ESF-related systems. Monitors providing signals for the actuation of non-engineered safety feature systems should be designed and qualified to the design and QA criteria applicable to the actuated system or to the criteria shown in Table 1 of this appendix and guidance of this SRP section. 4.