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:
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 system into operation, including operation of applicable portions of the protection system, the transfer between normal and emergency power sources, and the operation of associated systems. GDC 42 and 43 are applicable to SRP 6.2.5 because inspection and testing of structures, systems, and components of the containment atmosphere cleanup system is essential to ensure that the containment atmosphere cleanup systems are in operational condition. Meeting the requirements of GDC 42 and 43 provides additional assurance that structures, systems and components of the containment atmosphere cleanup systems will perform their safety functions34 4. 10 CFR 50.34 requires that plant designs must: (a) accommodate hydrogen generation equivalent to 100% metal-water reaction of the fuel cladding; (b) limit containment hydrogen concentration to no greater that 10%; and (c) provide containment-wide hydrogen control (such as igniters or inerting) for severe accidents. 10 CFR 50.34 is applicable to SRP 6.2.5 because on the basis of numerous studies and several experiments conducted by the staff, the staff concluded, by Safety Requirements Memorandum (SRM) dated July 21, 1993, that there is sufficient basis to include the requirements of 10 CFR 50.34. In the past decade, the results of these efforts have been published in NUREG/CR-4905, 4961, 5275, and 5525 which also provide guidance in meeting these requirements. Meeting the requirements of 10.CFR 50.34 and the SRM dated July 21,1993, will provide additional assurance that the equipment designed control combustible gas will perform its intended safety function and provide assurance to the public that offsite radiation doses will be ALARA.35 5. 10 CFR 50.46 requires that each boiling and pressurized light-water nuclear power reactor