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:
and 43 are met. 41 8. CSBSCSB reviews the capability to monitor system performance and control active components to be sure that control can be exercised over a system and that a malfunctioning system train or component can be isolated. The instrumentation provided for this purpose should be redundant and should enable the operator to identify the malfunctioning system train or component. 9. CSBSCSB reviews the extent of sharing of system equipment between plants at multi-unit sites or between sites to assureensure that system redundancy requirements are satisfied and that adequate procedural provisions have been made to assureensure the availability of the shared equipment on a timely basis. The results of CSBSCSB analyses of combustible gas production and accumulation are used to confirm the time available following postulated loss-of-coolant accidentsLOCAs to transport the shared equipment to the plant and put it into operation. CSB reviews the containment penetrations needed for plants that utilize external recombiners to assure the single failure criteria outlined in Item II.E.4.1 of NUREG-0737 or NUREG-0718 are met.42 9. CSBSCSB reviews analyses of the functional capability of the systems provided to mix combustible gases within the containment. CSBSCSB reviews the supporting information in the safety analysis report which should include elevation drawings of the containment showing the routing of ductwork and the circulation patterns caused by fans, sprays, or thermal convection. Special attention is paid to interior compartments to DRAFT Rev. 3 - April 1996 6.2.5-12 assureensure that combustible gases cannot collect in them without mixing with the bulk containment atmosphere. CSBSCSB ensures that interior compartments are identified in the safety analysis report and the provisions made to assureensure circulation within them are discussed. Systems provided to mix the combustible gases within the containment may also be used for containment heat removal,