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Plant Improvement
Coal Creek 1 ~150 Btu /KwHr
Council Bluffs ~90 Btu /KwHr
Coronado Generating 9.9 MW
North Anna 7.0 MW
Comanche Peak 1 & 2 4.4 MW
CONFIDENTIAL2
Increased plant efficiency
Optimize PM Repair Scheduling
Lower valve maintenance cost
Confirm effectiveness of repairs
CONFIDENTIAL 3
P&ID Review, Custom Database Creation
Custom Troubleshooting Plans
Loss Potential Analysis & Report
On-Site Testing & Preliminary Report
Conclusion Review by Senior Staff
Final Report –
Pre- Outage - Repair Recommendation & Loss Analysis
Post-Outage - Confirmation of Repair & Loss Recovery Analysis
CONFIDENTIAL 4
Main Steam
Gland Seal Steam
Hot & Cold Reheat
Turbine Drains
Extraction Steam
Feedwater
Condensate
Heater Drains
Boiler Vents and Drains
Aux Steam
CONFIDENTIAL 5
Normally CLOSED valves and Traps
Delta-P across valve
On the Piping
On the valve body
CONFIDENTIAL 6
CONFIDENTIAL 10
Multiple Signatures Taken
Upstream, downstream, and on the valve.
The Differential Signature Method
CONFIDENTIAL 11
2-Minute Signature Taken Records and displays
the opening and closing of the trap.
May Indicate the Trap is: Open or Oversized
Open Too Often
Open Too Long
Stuck Shut
Trap Block Valves Leaking
The Time Sweep Method
LargeEaten through the hard metal & is damaging the soft metal
MediumDamaging the hard metal, but not the soft metal.
SmallMay show no internal damage.
Long term history shows they don’t grow
CONFIDENTIAL 12
Loss Potential Analysis
Completed Prior to On-Site Testing
Used to evaluate test population
Identifies Priority of Testing
Loss Analysis
Completed by Senior staff upon receipt of test results
Utilizes survey data & conclusions
Evaluates and Ranks Leak Results & Prioritizes RepairsBased on economic impact
CONFIDENTIAL 13
List of Leakers
Output Recovery
List of Tight Valves
Repair Recommendations
CONFIDENTIAL 15
Twelve (12)
High-Value Targets: $4,197,212
Twenty Two (22)Medium-Value Targets:
$5,171,795
Ten (10)
Low-Value Targets: $5,208,054
0
10
20
30
40
50
$0.00 M
$1.00 M
$2.00 M
$3.00 M
$4.00 M
$5.00 M
$6.00 M
0 10 20 30 40 50 Po
ten
tia
l L
os
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(B
tu/K
W-H
r)
Po
ten
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l C
um
ula
tiv
e
Lo
ss
R
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($
)
Valves, In Order of Leakage to be Recovered
Sample Fossil Unit 1 Cycle Isolation Recovery Potential October 2008
Nominal Rated Output 1,400 MW Capacity Factor 80% Annual
Nominal Heat Rate 9,750 Btu/kW-Hr Outage Interval 36 Months
Fuel Cost $3.68 per MM Btu Cycle Isolation Loss 49 Btu/kW-Hr
Provide P&ID’s and Heat Balance
Operating Parameters
Outage Cycle (Months)
MW Rating & Capacity Factor
Fuel Replacement Cost
Insulation Inspection Holes
Operations Support
CONFIDENTIAL 16
All-Inclusive
Fixed Price
No Hidden Fees
Clearly Defined Deliverables
Objective evaluation of leaks
CONFIDENTIAL 17