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:
or effluents to appropriate treatment systems. Acceptable guidance is discussed in SRP Section 11.5 and ANS N42.18-2004. The average input flow rates and volumes are compared with the design flows to determine the fraction of time individual systems must be online to process normal waste inputs. The review considers the operational flexibility designed into the system (i.e., cross-connections between systems, redundant or reserve processing equipment, reserve storage capacity, and reliance on mobile processing systems). Based on the usage factors and operational flexibilities, an evaluation of the overall system capability to process and control wastes as related to items A through F above, is performed by comparing design flows with the potential process routes and equipment capacities. System capabilities to treat and hold for decay will be evaluated using the guidance and methods described in NUREG-0016 or NUREG-0017 and RG 1.112, as modified to reflect design features. If an alternate method includes the use of mobile processing systems connected to permanently installed GWMS systems, the staff will conduct a parallel review and evaluation using the above guidance and acceptance criteria. 5. The quality group and safety classifications of piping and equipment in the GRS portion of the GWMS are compared to the guidance of RG 1.143 and 4.21 for gaseous wastes produced during normal operation and AOOs. The seismic design criteria of equipment and structures housing the GRS are also compared to the design guidance identified in RG 1.143. When applicable, SRP Sections 3.2.1, 3.2.2, 3.3.1, 3.3.2, 3.5.3, 3.7.1 through 3.7.4, 3.8.4, and 3.8.5 will be used to evaluate exceptions. The applicant’s design is reviewed to ensure that it includes adequate provisions to stop continuous leakage paths after an explosion of combustible gas mixtures. The areas of concern are (1) process streams where water decomposition gases (hydrogen and oxygen) exist in a BWR, (2) cover gas