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:
ements of 10 CFR Part 50, §§ 50.34, 50.44 and 50.46 and GDC 41 for the design and functional capability of the combustible gas control systems, preliminary system designs and statements of intent in the SAR are acceptable at the construction permitCP or early site permit stage of review if the guidelines of Regulatory Guide 1.7 are endorsed. DRAFT Rev. 3 - April 1996 6.2.5-8 Technical Rationale30 The technical rationale for application of these acceptance criteria to reviewing combustible gas control in containment is discussed in the following paragraphs:31 1. Compliance with GDC 5 requires that structures, systems, and components important to safety shall not be shared among nuclear plant units unless it can be shown that such sharing will not significantly impair their ability to perform their safety functions, including, in the event of an accident in one unit, an orderly shutdown and cooldown of the remaining units. GDC 5 is applicable to SRP 6.2.5 because systems, structures, and components designed to control combustible gas in containment must be designed such that sharing of those components among nuclear plant units will not significantly impair their ability to perform their safety functions, including, in the event of an accident in one unit, an orderly shutdown and cooldown of the remaining units. Meeting the requirements of GDC 5 will provide an additional level of assurance that an accident in one unit will not affect other units of a multiple unit site and that the other units will continue to perform their safety functions.32 2. Compliance with GDC 41 requires that systems to control fission products, hydrogen, oxygen, and other substances which may be released into the reactor containment shall be provided as necessary to reduce, consistent with the 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