Document: NUREG-0800
Document ID: e1c5261f-4ef6-4478-8cf0-015611057574
Document Type: srp
Title: and 9.3.2, “Process and Post-accident Sampling Systems.”  The review addresses
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1502/ML15029A039.pdf
Revision Date: 2023-06
Chapter: 11
Section ID: 11.5
CFR Part: 
CFR Title: 

Content:
ity and environment; facilitate eventual decommissioning; and minimize, to the extent practicable, the generation of radioactive waste using the guidance of Interim Staff Guidance (ISG) DC/COL-ISG-06, “Final Interim Staff Guidance Evaluation and Acceptance Criteria for 10 CFR 20.1406 to Support Design Certification and Combined License Applications,“ RG 1.33, “Quality Assurance Program Requirements (Operation),” 1.143 and 4.21, and NEI 08-08A (ADAMS Accession No ML093220530) for gaseous wastes produced during normal operation and AOOs. 5. System designs should use the guidance in RG 1.52, 1.140 and 1.143 for the design, testing, and maintenance of HEPA filters and charcoal absorbers installed in normal ventilation exhaust systems. If decontamination factors for radioiodines that differ from those specified in RG 1.140 are used for design purposes, they should be supported by test data or industry standards under operating or simulated operating conditions, such as temperature, pressure, humidity, expected iodine concentrations, flow rate, type of charcoal (grade, mesh size and bulk density), and numbers and volume of delay tanks, dynamic adsorption coefficients for charcoal media, and estimated retention times. The test data should also consider the effects of aging and poisoning by airborne contaminants. 11.3-14 Revision 4 – January 2016 6. For processing systems equipped with automatic control features, the application should provide the justification for the placement of isolation dampers/valves and radiation detectors on process piping and effluent discharge lines to ensure the timely closure of such valves upon the detection of elevated radioactivity levels, and, if part of the design, controls in monitoring deviations of in-plant exhaust flow rates and 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 should fail in the