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Show FIGURE 4 RKOmmend.ct Proce .... METHOD OF PROCESS SELECTION aerodynamically air-staged (AAS) burners met the criteria the best. Therefore, this NOx Control System configuration was used for the subsequent preliminary subsystem and commercial design tasks. DEVELOPMENTAL NEEDS When the Preliminary Engineering Design was completed, the advanced 10w-NOx control subsystem was evaluated to detennine if there were any technical or engineering uncertainties with the design components. Any additional design infonnation and/or data necessary to reduce or eliminate these "uncertainties" were defined in a Design Deficiency Analysis. In conjunction with developing the Design Deficiency Analysis, a Research, Development, and Test (RD&T) Plan was developed to eliminate or reduce these uncertainties identified through engineering analysis, experimental testing, and numerical modeling. Table 1 summarizes the design deficiencies detennined by the NOx Control subsystem for the advanced 10w-NOx control system and the development activity that would address each deficiency. COMPONENT DEFINITION Task 4 of Phase I, Component Definition, implemented the activities described in the Research, Development, and Test Plan. Experimental testing was perfonned at the Massachusetts Institute of Technology (MIT) to evaluate the MIT -Radially Stratified Flame Core (RSFC) burner (Figure 5) and B&W's DRB-XCL ® burner (Figure 6). Testing was perfonned in MIT's Combustion Research Facility (CRF) with 5 MBtulhr pilot-scale burners. The purpose of the tests was to find a burner capable of 5 |