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:
in RG 4.21, Regulatory Positions C.1 through C.4. DC/COL-ISG-06 is incorporated in SRP Section 12.3-12.4. 3. SRP Section 11.3, Acceptance Criterion II.5 gives the technical rationale for 10 CFR 50.34a requirements. Meeting the requirements of 10 CFR 50.34a, as they relate to the GWMS, provides assurance that each nuclear power reactor will meet the criterion that controlled releases of radioactive materials in effluents to unrestricted areas in its vicinity will be kept ALARA and that the GWMS will have the necessary design features and equipment to control releases of gaseous effluent to the environment in accordance with the requirements of 10 CFR 20.1301 and 10 CFR 20.1302, Appendix I to 10 CFR Part 50, and GDC 60 and 61. See separate discussion, below, on the requirements of 10 CFR Part 20.1301(e). 4. Radioactive materials should be processed, handled, and stored using equipment, methods, and procedures that avoid or minimize potential releases of radioactivity in the event of a fire. GDC 3 relates to fire protection features for SSCs important to safety and can be used to provide guidance for GWMS design features and operational safeguards to prevent, for example, fires of contaminated charcoal adsorption media and HEPA filters used in ventilation systems, and to control and minimize the generation of explosive H2 and O2 gas mixtures in portions of the offgas system. When spent- activated carbon is stored in bulk quantities, storage methods and procedures should consider the potential for spontaneous heating and auto-ignition of activated carbon, which may be due to radioactive decay heat and adsorption of various vapors and gases, including oxygen. 11.3-19 Revision 4 – January 2016 With regard to the GRS portion of the GWMS, if a potential for explosive hydrogen and oxygen mixtures exists, then designing the GRS to withstand the effects of such an explosion or providing the GRS with dual instrumentation and design features to annunciate and prevent the