Document: NUREG-0800
Document ID: bcc615f1-3f65-4757-994f-88cc8fe800d5
Document Type: srp
Title: should still be met.
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070473.pdf
Revision Date: 2023-06
Chapter: 6
Section ID: 6.5.1
CFR Part: 
CFR Title: 

Content:
and design features necessary to carry out the fission product scrubbing function, including: a. Spray Solution Chemistry The forms of iodine for which spray removal credit is claimed in the accident analyses (SAR Chapter 15) are established. Containment spray systems may be designed for removal of iodine in the elemental form, in the form of organic DRAFT Rev. 3 - April 1996 6.5.2-8 compounds, and in the particulate form. Spray removal credit for other particulate fission products is also established. The systems or subsystems required to carry out the fission product scrubbing function of the containment spray are identified, such as the spray system, recirculation system, spray additive system, and water source. The design of the systems involved is reviewed in order to: (1) Ascertain the effectiveness of any chemical additive for iodine removal and retention. (2) Ascertain that the amount of additive is sufficient to meet the acceptance criteria of subsection II or that adequate justification is supplied for the iodine removal and retention effectiveness for the range of concentrations encountered. The concentrations 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 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.