Document: NUREG-0800
Document ID: 364356ce-150e-4dcb-865f-720ae91d37a7
Document Type: srp
Title: CONTAINMENT SPRAY AS A FISSION PRODUCT CLEANUP SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070473.pdf
Revision Date: 2023-06
Chapter: 6
Section ID: 6.5.2
CFR Part: 
CFR Title: 

Content:
l readiness whenever the reactor is critical for the design life of the plant. The storage facilities should be designed to prevent freezing, precipitation, chemical reaction, and decomposition of the additives. For sodium hydroxide storage tanks, heat tracing of tanks and piping is required whenever exposure to temperatures below 4.5 C (40 F) is predicted. An inert cover gas should be 18 provided for solutions that may deteriorate as a consequence of exposure to air. i. Single Failure The system should be able to function effectively and meet all the criteria in subsection II with a single failure of an active component in the spray system, in any of its subsystems, or in any of its support systems. 2. Testing Tests should be performed to demonstrate that the containment spray system, as installed, meets all design requirements for an effective fission product scrubbing function. Such tests should include preoperational verification of: a. freedom of the containment spray piping and nozzles from obstructions, b. capability of the system to deliver the required spray flow, and DRAFT Rev. 3 - April 1996 6.5.2-6 c. capability of the system to deliver spray additives (if any are needed) and to achieve the sump solution pH specified in the SAR. For a system whose performance is sensitive to the as-built piping layout, such as a gravity feed system, the testing should be performed at full flow. 3. Technical Specifications The technical specifications should specify appropriate limiting conditions for operation, tests, and inspections to provide assurance that the system is capable of performing its design function whenever the reactor is critical. These specifications should include: a. The operability requirements for the system, including all active and passive devices, as a limiting condition for operation (with acceptable outage times). The following items should be specifically included: containment spray pumps, additive pumps (if any), additive mixing devices (if