Document: NUREG-0800
Document ID: 5cb19e99-a561-4571-92e5-2933a6181985
Document Type: srp
Title: CONTAINMENT SPRAY AS A FISSION'PRODUCT CLEANUP SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340761.pdf
Revision Date: 2023-06
Chapter: 6
Section ID: 6.5.2
CFR Part: 
CFR Title: 

Content:
nd retention. (2) Ascertain that the amount of additive is sufficient to meet the acceptance criteria of subsection II or that adequate justifica- tion is supplied for the iodine removal and retention effective- ness for the range of concentrations encountered. The concentra- tions in the storage facility, the chemical addition lines, the spray solution injection, the containment sump solution, and the recirculation spray solution should be examined. The extremes 6.5.2-6 Rev. 2 - December 1988 of the additive concentrations should be determined with the most adverse combination of ECCS, spray, and additive pumps (if any) assumed to be operating, and considering a single failure of active components in the systems or subsystems. The reviewer verifies that the stability of the containment spray and sump solutions and the corrosion, solidification, and precipitation behavior of the chemical additives have appropriately been taken into consideration for the range of concentrations encountered. b. System Operation The time and method of system initiation, including chemical addition, is reviewed to confirm that the acceptance criteria of subsection II are met. Automatic initiation of spray is reviewed under SRP Sec- tion 6.2.2. The system operation should be continuous until the fission product removal objectives of the system are met. The reviewer should confirm that all requirements listed in the acceptance criteria, particularly those concerning spray coverage and sump solu- tion pH, are met during the recirculation phase. Switchover from the iniprtion mode to the recirculation mode following initiation to the spray system operation must be automatic to prevent damage to the spray pumps through loss of suction. c. Spray Distribution and Containment Mixing The number and layout of the spray headers used to distribute the spray flow in the containment space are reviewed. The reviewer verifies that the layout of the headers ensures coverage of essent- ially the entire