Document: NUREG-0800
Document ID: 65414bbc-012c-477d-8c25-466f94c1671f
Document Type: srp
Title: GASEOUS WASTE MANAGEMENT SYSTEMS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052350105.pdf
Revision Date: 2023-06
Chapter: 11
Section ID: 11.3
CFR Part: 
CFR Title: 

Content:
n and/or oxygen (as appropriate) should be upstream of the recombiners as well. The number of gas 11.3-5 Rev. 2 - July 1981 analyzers and control features at each location should be in accordance with this SRP section. O-ne gas analyzer upstream and one gas analyzer downstream of the recombiners should not be construed as dual gas analyzers. For systems Involving pressuirized storage tanks (exlu-ding surge tanks), at least one gas analyzer is required between the compressor and the storage tanks. Dual gas analyzers set to sequentially measure concentrations both upstream and downstream of a recombiner are acceptable for a PWR. When two or more potentially explosive process streams are combined before entering a component, each stream or the combination thereof, is required to have dual gas analyzers. If gas analyzers are to be used to sequentially measure several points in a system not designed to withstand a hydrogen explosion, at least one gas analyzer which is continuously on stream is required. The continuous gas analyzer should be at a point common to streams measured sequentially; i.e., should be sampling the combined stream., Gas analyzers should have daily sensor checks, monthly functional checks and quarterly calibrations. Gas analyzers installed in systems designed to withstand a hydrogen explosion should also be capable of withstanding a hydrogen explosion; as analyzers installed in the systems not designed to withstand a hdrogen explosion need not be capable of withstanding a hydrogen explosion (similar requirements apply to radiation monitors which are internal to lines containing potentially explosive mixtures). All gas analyzers shall be nonsparking. III. REVIEW PROCEDURES The reviewer will select and emphasize material from this SRP section, as may be appropriate for a particular case. 1. In the ETSB review of the gaseous waste management systems, the P&IDs and system process flow diagrams are reviewed to determine all sources of gaseous waste, the