Document: NUREG-0800
Document ID: 545a669a-51a1-4b1f-9d90-78ee08ca0845
Document Type: srp
Title: COMBUSTIBLE GAS CONTROL IN CONTAINMENT
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070463.pdf
Revision Date: 2023-06
Chapter: 6
Section ID: 6.2.5
CFR Part: 
CFR Title: 

Content:
le of withstanding all related environmental conditions imposed on them, including external transient differential pressures and internal pressure surges without loss of function. A description of the design provisions, such as pressure relief devices or conservative structural design, supporting analyses, and results of tests should be provided to support the conservatism of design. 6. In meeting the requirements of 10 CFR Part 50, §§ 50.34, 50.44 and 50.46 and GDC 41 regarding the functional capability of the combustible gas control systems to assureensure that containment integrity is maintained, combustible gas control systems should meet the redundancy and power source requirements for engineered safety features and should be designed to withstand a single active component failure. Supporting failure mode and effects analyses of each system should be provided in the safety analysis report. The containment penetrations needed for plants that utilize external recombiners must meet the requirements of Item II.E.4.1 of NUREG-0737 and NUREG-0718.27 6.2.5-7 DRAFT Rev. 3 - April 1996 7. To satisfy the design requirements of GDC 41: 28 a. combustible gas control systems should be designed, fabricated, erected, and tested to Group B quality standards, as recommended in Regulatory Guide 1.26; b. combustible gas control systems, including foundations and supports, should be designated as seismic Category I, i.e., designed to withstand the effects of the safe shutdown earthquake without loss of function, as recommended in Regulatory Guide 1.29; and c. performance tests should be performed on system components, such as hydrogen recombiners, and combustible gas analyzers. The tests should support the analyses of the functional capability of the equipment. d. combustible gas control system designs should include instrumentation needed to monitor system or component performance under normal and accident conditions. The instrumentation should be capable of determining that a