Document: NUREG-0800
Document ID: 936f16a2-5593-4498-8533-ddca55910376
Document Type: srp
Title: COMBUSTIBLE GAS CONTROL IN CONTAINMENT
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340704.pdf
Revision Date: 2023-06
Chapter: 6
Section ID: 6.2.5
CFR Part: 
CFR Title: 

Content:
requirements of GDC 41, 42 and 43, com- | bustible gas control systems should be designed with provisions for periodic inservice inspection, operability testing and leak rate testing of the systems or components. The inspection and test program is acceptable if it is judged to be consistent with that proposed for other engineered safety features. 11. To satisfy the design requirements of GDC 41, combustible gas control sys- tem designs should include instrumentation needed to monitor system or component performance under normal and accident conditions. The instrumen- tation should be capable of determining that a system is performing its intended function, or that a system train or component is malfunctioning and should be isolated. The instrumentation should have readout and alarm capability in the control room. The containment hydrogen monitor shall meet the requirements of Item II.F.1 of NUREG-0737 and NUREG-0718, and the Appendix of Regulatory Guide 1.97. 12. In meeting the requirements of GDC 5 regarding the sharing of system equip- ment between nuclear power units at a multi-unit site or between sites, sharing is acceptable provided (a) the shared equipment can be made avail- able to perform its function in a time period that is equal to or less than one-half the time before it is required to operate and (b) surveillance programs are coordinated to assure that redundant equipment is not out of service at the same time. Regulatory Guide 1.7 provides additional guidance on the sharing of equipment. 13. In meeting the requirement of 10 CFR Part 50, §§ 50.44 and 50.46 to provide the capability for controlled purging of the containment to aid in post- accident cleanup, the guidance provided in Regulatory Guide 1.7 should be followed. 14. In meeting the requirements of 10 CFR Part 50, §§ 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