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:
ive materials, as condensate, from building ventilation systems and ductwork, and gases vented from tanks and components. The discussions also refer to the guidance of RG 1.54 and RG 4.21 and industry guidance under NEI 08-08A in meeting the requirements of 10 CFR 20.1406. 2. Expanded discussion on processing systems equipped with automatic control features, justification for the placement of isolation dampers/valves and radiation detectors on process piping, ductwork, and effluent discharge lines to ensure their timely closure upon the detection of elevated radioactivity levels, and, if part of the design, controls in monitoring deviations of exhaust flow rates and terminating releases or isolating process flows when deviations exceed preset limits. 3. Expanded discussions on radiological monitoring instrumentation classified as safety- related functions and instances when such instrumentation may perform complementary roles, such as used to comply with the requirements of 10 CFR Part 20 and 10 CFR Part 50 during normal operations and TMI-related requirements. The discussion addresses monitoring instrumentation and performance criteria of RG 1.97 and BTP 7-10 in confirming that such instrumentation can provide complementary functions in monitoring radiological conditions during normal operations and AOOs. 4. Expanded discussion on quality assurance provisions given the guidance of RG 1.143 for PERMISS subsystem interfaces with RWMS components not covered by the requirements of 10 CFR Part 50, Appendix B. 5. Expanded discussions on design features used for purging and flushing sampling lines and monitors with nonradioactive fluids (e.g., clean water, air, inert gases) and routing 11.5-66 Revision 6 – January 2016 purged or flushed fluids to the LWMS and GWMS. The discussion addresses confirmation that sources of nonradioactive purging or flushing fluid is protected from backflow and radioactive cross-contamination by using appropriate measures, such as check