Document: NUREG-0800
Document ID: ba7b8f31-872f-4ab8-bdf8-7be885afd4b6
Document Type: srp
Title: LIQUID WASTE MANAGEMENT SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1502/ML15029A032.pdf
Revision Date: 2023-06
Chapter: 11
Section ID: 11.2
CFR Part: 
CFR Title: 

Content:
e environment, or diverting process streams or effluents to appropriate treatment subsystems. Acceptable guidance is presented 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 subsystems must be online to process normal waste input volumes. The review considers the operational flexibility designed into the system (i.e., cross-connections between subsystems, 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, B, C, and D, above, is performed by comparing design flow rates and volumes with the potential process routes and equipment capacities. It will be assumed that the primary means for processing liquid waste is unavailable for 2 consecutive days per week for maintenance. If a 2-day holdup capacity or a primary water processing source is not available for the process stream, it will be assumed that the waste stream is processed by an alternate method or discharged to the environment, consistent with an effluent source term developed using the guidelines referred to in 11.2-24 Revision 5 – January 2016 NUREG-0016 or NUREG-0017 and RG 1.112, with plant parameters modified to reflect specific design features. If the alternate method includes the use of mobile processing systems connected to permanently installed LWMS subsystems, the staff will conduct a parallel review and evaluation of such a method using the above guidance and acceptance criteria. 5. The quality group and safety classifications of piping and equipment within the LWMS are compared to the guidelines of RGs 4.21 and 1.143 for liquid wastes produced during normal operation and AOOs. The seismic design criteria of equipment and structures housing the LWMS are also compared to