CH-TRAMPAC - Waste Isolation Pilot Plant - U.S. Department of ...

CH-TRAMPAC Document Rev. 2, May 20055.2.5 Unified Flammable Gas Test Procedure5.2.5.1 IntroductionCH-TRU wastes to be transported in the TRUPACT-II and HalfPACT packages fall into one oftwo categories based on their gas generation potential—“analytical category waste” or “testcategory waste.” The wastes that can be qualified for shipment based on decay heat limitsderived from theoretical worst-case calculations of gas generation potential comprise the“analytical category.” The CH-TRU waste containers that exceed the applicable decay heatlimits set for the analytical category, or that exceed 500 ppm of flammable VOCs in theheadspace, or that do not have an established theoretical bounding gas generation rate (G value),belong in the “test category.” The Unified Flammable Gas Test Procedure (UFGTP) details themethodology used to evaluate compliance of test category wastes with flammable (gas/VOC)limits.5.2.5.1.1 PurposeThis UFGTP provides the technical basis for determining whether a test category payloadcontainer demonstrates compliance with the flammable (gas/VOC) limits. It also providesinstructions for the methodology by which each test activity will be performed. The first, orshort-term, objective of the UFGTP is to facilitate shipment of waste in the test category bytesting individual payload containers to show compliance with the flammable gas generation andconcentration requirements. The second, or long-term, objective is to improve wasteshippability for specific populations or subpopulations of waste by arriving at more realistic gasgeneration rates based on the results of measurement and testing. The process forimplementation of the long-term objective is defined in the “UFGTP Long-Term ObjectiveImplementation Methodology” 5 and described in Section 5.2.5.5.5.2.5.1.2 ApplicabilityThis procedure applies to individual containers of CH-TRU waste that fall into the test category.Containers are placed into the test category if they fall into one of the following classifications.• The decay heat loading of the waste container exceeds the analytical category decay heatlimit for the shipping category of that payload container and the total concentration ofpotentially flammable VOCs within the container headspace is less than or equal to500 ppm. Payload containers in Waste Types I (10), II (20), and III (30) belong in thiscategory.• The total concentration of potentially flammable VOCs within the container headspaceexceeds 500 ppm. Payload containers in Waste Type I (10), II (20), and III (30) belongin this category.5Shaw Environmental & Infrastructure, Inc., current revision, UFGTP Long-Term Objective ImplementationMethodology, Shaw Environmental & Infrastructure, Inc., Albuquerque, New Mexico.5.2-31