Document: NUREG-0800
Document ID: 65414bbc-012c-477d-8c25-466f94c1671f
Document Type: srp
Title: GASEOUS WASTE MANAGEMENT SYSTEMS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052350105.pdf
Revision Date: 2023-06
Chapter: 11
Section ID: 11.3
CFR Part: 
CFR Title: 

Content:
ater Reactors (PWRs)." 7. NUREG-0016, "Calculation of Releases of Radioactive Materials in Gaseous and Liquid Effluents from Boiling Water Reactors (BWRs)." 8. Regulatory Guide 1.143, "Design Guidance for Radioactive Waste Management Systems, Structures and Components in Light-Water-Cooled Nuclear Reactor Power Plants." 9. Regulatory Guide 1.140, "Design, Testing and Maintenance Criteria for Normal Ventilation Exhaust System Air Filtration and Adsorption Units of Light-Water-Cooled Nuclear Power Plants." 11.3-10 Rev. 2 - July 1981 BRANCH TECHNICAL POSITION ETSB 11-5 Postulated Radioactive Releases Due to a Waste Gas System Leak or Failure A. BACKGROUND During nornal operation of a nuclear power plant, radioactive fission and activation gases and gases that are the result of radiolytic decomposition of water are generated in the reactor and are continuously removed from the reactor coolant. After separation, the gases may be treated for volume reduc- tion of the nonradioactive species before the radioactive gases are stored for radioactive decay prior to release to the environment. The system to accomplish this separation, reduction, and decay process is called the waste gas system. The waste gas system at BWRs may include steam air ejectors, vacuum pumps, decay pipes, moisture separators, condensers, cryogenic distillation, tanks, ambient or chilled charcoal adsorbers, filters, process sampling, instrumenta- tion and radiation monitoring, and control features. The waste gas system at PWRs may include volume control tank, letdown or shim bleed gas separation, gas stripping, cover gas collection, compressors, recombiners, surge and storage tanks, ambient or chilled charcoal adsorbers, moisture separators, condensers, filters, process sampling, instrumentation and radiation monitor- ing, and control features. In all cases, the waste gas system is a radioactive gaseous waste management system required by 10 CFR Part 50, Section 50.34a, with system operation in