Document: NUREG-0800
Document ID: c8df76d2-a185-407d-a110-f0bc0fb638ad
Document Type: srp
Title: LIQUID WASTE MANAGEMENT SYSTEMS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052350102.pdf
Revision Date: 2023-06
Chapter: 11
Section ID: 11.2
CFR Part: 
CFR Title: 

Content:
e design flows to determine the fraction of time individual subsystems must be online to process normal waste inputs. ETSB will review the operational flexibility designed into the system, i.e., cross connections between subsystems, redundant or reserve processing equipment, and reserve storage capacity. Based on the usage factors and operational flexi- bilities, ETSB will evaluate the overall system capability to process wastes in the event of (a), (b),.or (c), above, by comparing the design flows to the potential process routes and equipment capacities. ETSB will assume evaporators are unavailable for 2 consecutive days per week for maintenance. If two days holdup capacity or an alter- native evaporator are not available for the process stream, ETSB will assume the stream is processed by an alternate route or discharged to the environment, consistent with the guidelines of NUREG-0016 and NUREG-0017. 3. ETSB compares the seismic and quality group classification for radwaste systems with the guidelines of Regulatory Guide 1.143. Exceptions are transmitted to MEB in accordance with our coordinated review responsibility given in subsection I, above. ETSB assures that the design includes provisions to prevent and collect leakage due to overflows and spillage from indoor and outdoor storage tanks, and are in conformance with the guidelines of Regulatory Guide 1.143. ETSB reviews the seismic design criteria of structures housing the liquid radwaste system in accordance with the design guidance identified in Regulatory Guide 1.143. Exceptions are transmitted to SEB in accordance with our-coordinated review responsi- bility given in subsection I, above. 4. ETSB compares the system design, system and building layout, equipment design, method of operation, and provisions to reduce leakage and facilitate operations and maintenance with the guidelines of Regulatory Guide 1.143. ETSB will evaluate special design features provided to control leakage from system components and