Document: NUREG-0800
Document ID: 74972ece-4976-4bb9-a67e-54a1425f2735
Document Type: srp
Title: GASEOUS WASTE MANAGEMENT SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1502/ML15029A039.pdf
Revision Date: 2023-06
Chapter: 11
Section ID: 11.3
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Content:
urized water reactors (PWRs) and boiling water reactors (BWRs). The staff’s evaluation assesses whether an applicant demonstrates compliance with regulatory limits on gaseous effluent discharges and associated doses to members of the public in ensuring that releases and doses are as low as reasonably achievable (ALARA). In PWRs and BWRs, the GWMS is designed to ensure that gaseous wastes produced during normal operation, including anticipated operational occurrences (AOOs), are handled, processed, stored, and released or routed to their final destination in accordance with the relevant NRC regulations. A subsystem, the gaseous radwaste system (GRS), provides for the management of radioactive gases generated by offgas system, which includes waste gas storage tanks, waste gas decay tanks, and charcoal delay beds, depending on the type of plant and design features. The GWMS processes gases from the condenser air removal system, steam generator blowdown flash tank, containment purge exhausts, and gland seal exhausters. The system also includes hydrogen and oxygen recombiners and instrumentation to control hydrogen and oxygen levels. Finally, the GWMS services building ventilation system exhausts used to process ambient atmospheres from radiologically controlled areas where radioactive systems and components are located, and radioactive gases and vapors vented from components, such as tanks, vessels, and process equipment. The management for gaseous effluents to the environment from the above sources may, in turn, involve the use of mobile equipment connected to permanently installed systems to reduce releases of radioactive materials in effluents. The GWMS has been categorized as nonsafety-related and nonrisk-significant. Failure of systems must not compromise any safety-related system or component, nor may it prevent the safe shutdown of the plant. However, the failure of specific systems or components may have some impacts on the means to treat, control, and monitor