Oklahoma Gas & Electric Muskogee Generating Station Best ...

Oklahoma Gas & Electric
Muskogee Generating Station – BART Determination
May 28, 2008
NOx Control
Technology Option
Table 3-9
Muskogee Units 4 & 5
NOx Average Visibility Cost Impact Evaluation
Total Annual
Cost
Modeled
Visibility
Impairment*
29
Visibility
Impairment
Improvement
from Baseline
Average
Improvement
Cost
Effectiveness
($/yr) 98 th % ∆-dv* (dv) ($/dv/yr)
Baseline -- 1.06 -- --
LNB/OFA $4,183,600 0.32 0.74 $5.65 MM/dv
LNB/OFA + SCR $61,591,200 0.14 0.92 $66.9 MM/dv
* ∆-dv values included in this table represent the modeled visibility impacts only from NOx emissions
associated with each NOx retrofit control scenario. Modeled visibility impairment at the Caney Creek Class I
Area was used for the cost effectiveness evaluation because modeling indicated that the largest ∆-dv
improvements would occur at Caney Creek.
Although SCR control systems reduce modeled visibility impacts at the four Class I Areas, the
incremental cost effectiveness of SCR control (with respect to visibility improvement) is very high.
Incremental cost effectiveness of SCR control is in the range of $319 million per dv improvement
at the Wichita Mountains. This cost is significantly higher than costs incurred at other BART
applicable sources. A review of BART determinations at other coal-fired units suggests that BART
cost effectiveness values are typically in the range of less than $1.0 million to approximately $13
million per dv improvement. 14 The combination of low visibility impacts with LNB/OFA controls
(less than 0.32 ∆-dv at all Class I Areas) and the high cost of SCR controls contribute to the large
incremental cost effectiveness of SCR at the Muskogee Station.
NOx Control
Technology Option
Table 3-10
Muskogee Units 4 & 5
NOx Incremental Visibility Cost Impact Evaluation
Total Annual
Cost
Incremental
Annual Cost
Modeled
Visibility
Impairment
Incremental
Visibility
Impairment
Improvement
Incremental
Improvement
Cost
Effectiveness
($/yr) ($/yr) 98 th % ∆-dv* (dv) ($/dv/yr)
Baseline -- -- 1.06 -- --
LNB/OFA $4,183,600 -- 0.32 -- --
LNB/OFA + SCR $61,591,200 $57,407,600 0.14 0.18 $319 MM/dv
* ∆-dv values included in this table represent the modeled visibility impacts only from NOx emissions associated with
each NOx retrofit control scenario. Modeled visibility impairment at the Caney Creek Class I Area was used for the cost
effectiveness evaluation because modeling indicated that the largest ∆-dv improvements would occur at Caney Creek.
14 See e.g., BART evaluations for Xcel (Sherco, MN); Great River Energy (Coal Creek, ND); Trigen Energy
Co. (CO); Entergy White Bluff Power Plant (AR).