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:
considered. The reviewer confirms that the required sump solution concentrations are achieved within the appropriate time intervals. The pH of the sump solution should be reviewed in regard to iodine re-evolution, using the criteria given in subsection II.I.g and the procedure in subsection III.4.c.(2). f. Storage of Additives The design of any additive storage tank is reviewed to establish whether heat tracing is required to prevent freezing or precipitation in the tank. The reviewer determines whether an inert cover gas is provided for the tank to prevent reactions of the additive with air, such as the formation of sodium carbonate by the reaction of sodium hydroxide and carbon dioxide. Alternatively, the reviewer verifies by a conservative analysis that an inert cover gas is not required. g. Single Failure The system schematics are reviewed by inspection, postulating single failures of any active component in the system, including inadvertent operation of valves that are not locked open. The review is performed with respect to the fission product removal function, considering conditions that could result in fast as well as slow injection of the spray solution. 2. Testing At the construction permit stage, the containment spray concept and the proposed tests of the system are reviewed to confirm the feasibility of verifying the design functions by appropriate testing. At the operating license stage, the proposed tests of the system and its components are reviewed to verify that the tests will demonstrate that the system, as installed, is capable of performing, within the bounds established in the description and evaluation of the system,.all functions essential for effective fission product removal following postulated accidents. 3. Technical Specifications The technical specifications are reviewed to verify that the system, as designed, is capable of meeting the design requirements and that it remains in a state of readiness whenever the reactor is critical. a.