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:
e functioning of other systems, the concentration and quality of fission products released to the environment following postulated accidents, and to control the concentration of hydrogen or oxygen and other substances in the containment atmosphere following postulated accidents to assure that containment integrity is maintained. GDC 41 is applicable to SRP 6.2.5 because measures must be taken to mitigate the consequences of a severe accident which results in the release of fission products and to limit the effects of uncertainties in severe accident phenomena. This may be accomplished by combined action of inerting containment with nitrogen, providing safety-related thermal hydrogen recombiners with associated piping, valves, controls and instrumentation and purging. Meeting the requirements of GDC 41 provide an additional level of assurance that systems are being provided to control the concentration and quality of fission products released to the environment are as low as reasonably allowable following postulated accidents, and to the concentration of hydrogen or oxygen and other substances in the containment atmosphere following postulated accidents are controlled and that containment integrity is maintained. 33 3. GDC 42 requires that the containment atmosphere cleanup systems shall be designed to permit periodic inspection of important components, such as filter frames, ducts, and piping to assure the integrity and capability of the system. 6.2.5-9 DRAFT Rev. 3 - April 1996 GDC 43 requires that the containment atmosphere cleanup systems shall be designed to permit periodic pressure and functional testing to ensure (a) the structural and leaktight integrity of its components, (b) the operability and performance of the active components of the systems such as fans, filters, dampers, pumps, and valves, and (c) the operability of the system as a whole and under conditions as close to design as practical, the performance of full operational sequence that brings the