Document: NUREG-0800
Document ID: 66e7af3b-21c0-444f-8737-0830bb176eba
Document Type: srp
Title: PROCESS AND EFFLUENT RADIOLOGICAL MONITORING INSTRUMENTATION
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1502/ML15029A182.pdf
Revision Date: 2023-06
Chapter: 11
Section ID: 11.5
CFR Part: 
CFR Title: 

Content:
tems, if separate from the fuel storage area ventilation system. f. Also called closed cooling water systems and component cooling loop systems. g. Includes refueling pool cleanup systems. h. Includes suppression tanks, reactor drain tanks, equipment and drain sumps collecting leakage, drainage, sampling, and condensate. i. Continuous radiation monitor. j. Automatic control feature. For example, the continuous liquid effluent radiation monitor (see note m, below) should be equipped to alarm at a setpoint established in the RETS/SREC and ODCM and should automatically terminate effluents in the discharge line by closing an isolation valve (see SRP Acceptance Criterion 3.D and Technical Rationale Item 6 and note “m” below). k. Sample point should be available to obtain grab samples for laboratory analyses as indicated by notations or for the purpose of confirming the results of continuous radiation monitoring. l. Continuous sampler (see SRP Acceptance Criterion 1.B). m. The automatic control feature may be alternatively provided by a process continuous radiation monitor located at a point upstream of the systems’ effluent continuous radiation monitor to ensure the timely closure of the isolation valve/damper to avoid exceeding discharge limits. If part of the design, controls in monitoring deviations of in- plant dilution and exhaust flow rates in terminating releases or isolating process flows when deviations exceed preset limits. 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. Acceptable guidance is presented in this SRP section and ANS N42.18-2004. These provisions also apply to liquid and gaseous process radiation monitoring equipment not covered by the ODCM. NG - Noble gas radioactivity, such as argon, krypton, and