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:
nical 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. Limiting Conditions for Operation The limiting conditions for operation should require the operability of the containment spray pumps, all associated valves and piping, the 6.5.2-8 Rev. 2 - December 1988 appropriate quantity of additives, and any metering pumps or mixing devices. b. Tests Preoperational testing of the system, including the additive .storage tanks, pumps (if any), piping, and valves, is required. In parti- cular, the preoperational testing should verify that the system, as installed, is capable of delivering a well-mixed solution containing all additives with concentrations falling within the design margins assumed in the dose analyses of SAR Chapter 15. Periodic testing and exercising of all active components should include the spray pumps, metering pumps (if any), and valves. Con- firmation should be made periodically that passive components, such as all essential spray and spray additive piping, and any passive mixing devices are free of obstructions. The contents of the spray additive storage tanks should be sampled and analyzed periodically to verify that the concentrations are within the established limits, that no concentration gradients exist, and that no precipitates have formed. 4. Evaluation The fission product removal effectiveness of the system is calculated to establish the degree of dose mitigation by the containment spray system following the postulated accident. The mathematical model used for this calculation should reflect the preceding steps of the review. The analy- sis and assumptions are as follows: a. The amounts of fission products assumed to be released to the containment space are obtained from Regulatory Guide 1.3 (Ref. 6) or Regulatory Guide 1.4 (Ref. 7), as appropriate. The amounts of fis- sion product airborne inside the