Document: NUREG-0800
Document ID: 48fb37ec-8e3e-4c2c-96c3-daa5e7da62f9
Document Type: srp
Title: of the applicant's SAR is reviewed to identify any missing data,
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340557.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.4.12
CFR Part: 
CFR Title: 

Content:
of up to 35 gallons per minute per unit. We conclude that the system meets the requirements of General Design Criterion 5 in that those portions which are shared between reactor units have sufficient redundancies to enable them to perform their safety functions in the event of postulated single failures. The applicant will include provisions in the design for monitoring of pump operation, and visual inspection of drain outlets in the sump will provide assurance that the zoned filter, drains, and pumps are functioning properly. Seismic Category I manholes, located along the exterior walls of the reactor and auxiliary buildings, will pro- vide access to the perforated pipe in the zoned wall filter for inspection and cleanout. These manholes can be used for temporary installation of pumps in the unlikely event that groundwater rises in the wall drains. An inspection and monitoring procedure will be developed for both the construction and operation phase of the plant. Several observation wells will be located at strategic locations to monitor groundwater levels in the vicinity of the shield and auxiliary buildings and will be used to verify that-the groundwater drawdown is effected as predicted and to establish its extent of influence in the yard area. These wells will be monitored periodically during construction for a sufficient period to verify that a steady-state condition has been achieved. The details of the operational monitoring program will be provided during the operating license stage of our review. The applicant states that design parameters used to size the dewatering system and to establish the monitoring program will be verified during construction excavation. The applicant has agreed that the currently proposed system would be modified or other groundwater drainage designs 2. 4.12-5 Rev. 2 - July 1981 would be adopted in the event that the current design parameters are found to be substantially changed, as determined during construction excavation. For