City of Tallahassee

City of Tallahassee

City of Tallahassee

Power Plant Operator

Job Performance Measure

Plant Operator Hopkins Seal Oil and Hydrogen System TH-HOP-14

Performance Measure: Seal Oil and Hydrogen System

Name:

All Parts Satisfactorily Completed:

(Examiner’s Signature) (Date)

Supervisor’s Comments: ______

______

______

______

References:

  1. Training Seal Oil and Hydrogen System TH-HOP-14

Materials Needed:

  1. Pencil
  2. System Description – Seal Oil and Hydrogen System TH-HOP-14-SD
  3. System Operating Procedure – Seal Oil and Hydrogen System TH-HOP-14-SOP
  4. Associated Operator Route Check List

Safety/Environmental:

  1. Wear hard hats, safety glasses, safety toe shoes, and ear plugs as required.
  2. Discuss safety and environmental hazards associated with operating the system.
  3. Discuss any unusual operating conditions associated with the system.

Note:Always observe all plant safety rules in accordance with City of Tallahassee Safety and Health Procedures and all Federal, State and/or Local OSHA Standards.

Part A: Location of System Components

Conduct a walkthrough of the Seal Oil and Hydrogen System.

Locate, identify, and describe the operational function of the components listed below for the Seal Oil and Hydrogen System:

  1. Generator Shaft Seals
  2. Air Side Seal Oil Pump
  3. Turbine Lube Oil Backup Control Valves
  4. Air Side Seal Oil Backup Pump
  5. Hydrogen Side Seal Oil Pump
  6. Seal Oil Coolers
  7. Hydrogen Side Drain Regulator
  8. Generator Bearing Drain (Loop Seal) Tank
  9. Generator Bearing Oil Drain Line Vapor Extractor
  10. Hydrogen Bulk Storage and Supply Manifold
  11. Carbon Dioxide Storage and Supply Manifold
  12. Hydrogen Distribution Tube
  13. Carbon Dioxide Distribution Tube
  14. Hydrogen Monitoring System
  15. Gas Dryer

Satisfactorily Completed ______

Part B: Location of Local Control Panels and Breakers

Conduct a walkthrough of the Steam Turbine System. Locate, identify and describe the operational function of the Steam Turbine System local control panels and breakers.

Generator Control Panel

Lube Oil Conditioner Hydrogen Control Panel

Satisfactorily Completed ______

Part C: Replace Generator Air with Carbon Dioxide

Using the following steps, demonstrate how to replace air in the generator with carbon dioxide. Explain your actions at each step.

Explain Your Actions
1.VERIFY all gas system valves are aligned. / L
2.DISCONNECT the hydrogen supply line removable link. / L
3.PLACE blank on link flanges. / L
4.CLOSE valves 1, 3, 8, and 50. / L
5OPEN valves 2, 4, 5, and 7. / L
6.OPEN CO2 bottle supply valves. / L
7.OPEN valve 60. / L
8.VERIFY carbon dioxide pressure on bottle header gauge. / L
9.VERIFY the purity meter on the Hydrogen Control Panel goes to 95% or greater CO2. / L
10.CLOSE CO2 bottle supply valves. / L
11.CLOSE valve 60. / L
12.CLOSE valves 2, 4, 5, and 7. / L
13.OPEN valves 1 and 3. / L

Part D: Replace Generator Carbon Dioxide with Hydrogen

Using the following steps, demonstrate how to replace air in the generator with carbon dioxide. Explain your actions at each step.

Explain Your Actions
1.REMOVE the hydrogen supply line removable link blanks. / L
2.REPLACE the hydrogen supply line removable link. / L
3.OPEN valves 6, 8, and 53. / L
4.OPEN valve 50. / L
5ADJUST hydrogen pressure regulator to supply 60 psig hydrogen. / L
6.VERIFY the purity meter value reads 95% or greater hydrogen. / L
7.CLOSE valve 6. / L
8.OPEN valve 24 for 2 minutes and then CLOSE valve. / L
9.ADJUST the hydrogen regulator as required to maintain the proper hydrogen pressure. / L
10.RESTART the hydrogen side seal oil pump.. / L

Part E: Place the Generator Seal Oil System in Service

Using the following steps, demonstrate how to place the generator seal oil system in service. Explain your actions at each step.

Explain Your Actions
1.VERIFY electrical lineup. / L
2.VERIFY the seal oil system valves are aligned. / L
3.CLOSE turbine lube oil backup supply valves. / L
4.START the air side seal oil pump. / L
5Verify hydrogen side drain regulator level increases. / L
6.VERIFY hydrogen side drain regulator level is maintained by drain and fill valves. / L
7.CLOSE the air side seal oil outlet valve. / L
8.ADJUST the air side seal oil pump relief valve until the pressure indicator reads 100 psig. / L
9.OPEN the air side seal oil outlet valve. / L
10.ADJUST the differential pressure regulator to bring air side seal oil pressure to 12 psig above gas pressure. / L
11START the hydrogen side seal oil pump. / L
12.CLOSE the hydrogen side seal oil valves. / L
13.CLOSE the hydrogen side seal oil recirc valve. / L
14.ADJUST the hydrogen side seal oil pump relief valve until the pressure indicator reads 100 psig. / L
15.OPEN the hydrogen side seal oil valves. / L
16.ADJUST the regulating valves until the associated pressure gauges read ± 2” H2O. / L
17.ADJUST the backup main oil pressure regulating valve to a 125 psig outlet. / L
18.OPEN the turbine oil backup supply valves. / L
19.STOP the air side seal oil pump. / L
20.ADJUST the backup supply regulator to maintain the seal oil supply at 8 psig above hydrogen pressure. / L
21.RESTART the air side seal oil pump. / L
22.OPEN pressure switch PS-8 test valve. / L
23.When pressure on the associate indicator reaches 5 psi, VERIFY the air side seal oil backup pump starts. / L
24.CLOSE the pressure switch PS-8 test valve. / L
25.STOP the air side seal oil backup pump. / L
26.STOP the hydrogen side seal oil pump. / L
27.VERIFY the HYDROGEN SIDE SEAL OIL PUMP OFF alarm at the Hydrogen Control Panel. / L
28.RESTART the hydrogen side seal oil pump. / L

Part E: Remove the Seal Oil System from Service

Using the following steps, demonstrate how to shut down the generator. Explain your actions at each step.

Explain Your Actions
1.VERIFY the seal oil system is no longer required for service. / L
2.STOP the hydrogen side seal oil pump. / L
3.STOP the air side seal oil pump. / L
4.When pressure on associate indicator reaches 5 psi, VERIFY the air side seal oil backup pump starts. / L
5STOP the air side seal oil pump. / L
6.CLOSE turbine seal oil backup supply valves 263 and 265. / L
7.VERIFY the seal oil pressure decrease to 0. / L
8.CLOSE condensate cooling water valves to and from seal oil coolers. / L
9.STOP the generator seal oil vapor extractor. / L
ALARM CONDITIONS
Alarms / Initiating Device(s) / Device Setpoint(s
Control Room (BTG) Alarms
Hydrogen Annunciator Panel Alarm / Hydrogen Panel
Hydrogen Control Panel
Hydrogen Purity High/Low / Purity Meter
Hydrogen Pressure High / Hydrogen Pressure Transmitter
Hydrogen Supply Pressure Low / PS-3
Water Detector High / ASH614A/B/C
Hydrogen Temperature High / n/a
Defoaming Tank Level High / LS-6
Air Side Seal Oil Pump Off / PDS-7
Seal Oil Pressure Low / PDS-8
Hydrogen Side Level Low / LS-9
Seal Oil Turbine Backup Pressure Low / PS-10
Hydrogen Side Seal Oil Pump Off / PDS-11
Air Side Seal Oil Backup Pump Running
Satisfactorily Completed ______

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