Document: NUREG-0800
Document ID: 848ab24d-ac9b-4ec5-85ff-099e13b769c3
Document Type: srp
Title: CONTAINMENT SPRAY AS A FISSION PRODUCT CLEANUP SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0601/ML060150001.pdf
Revision Date: 2023-06
Chapter: 6
Section ID: 6.5.2
CFR Part: 
CFR Title: 

Content:
med in the accident analyses (SAR Chapter 15). Containment spray systems may be designed for removal of iodine in the elemental form, in the form of organic compounds, and in the particulate form. The reviewer also determines whether spray removal credit is claimed for other particulate fission products. The systems or subsystems required to carry out the fission-product-scrubbing function of the containment spray are identified, for example, the spray system, recirculation system, spray additive system, and borated water source. The design of the systems involved is reviewed in order to: Rev. 3 - December 2005 6.5.2-8 (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 given 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 considered for the range of concentrations encountered. b. System Operation (secondary reviewer) 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 Section 6.2.2. The system should operate continuously until the fission product removal objectives of