Appendix E-2.c.i Energy Plan 2004-2013 Follow-up Studies and ...
Appendix E-2.c.i Energy Plan 2004-2013 Follow-up Studies and ...
Appendix E-2.c.i Energy Plan 2004-2013 Follow-up Studies and ...
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Re-powering Study for the Northport <strong>and</strong> Port Jefferson Power Stations<br />
<strong>Appendix</strong> II Northport System Descriptions<br />
• Main Steam Letdown Pressure Control Valve<br />
• Cold Reheat Letdown Pressure Control Valve<br />
• Main Steam Letdown Attemperating Water Spray Control Valve<br />
• Cold Reheat Letdown Attemperating Water Spray Control Valve<br />
• Auxiliary Boiler System<br />
• All associated piping <strong>and</strong> instrumentation.<br />
1.5.2 Auxiliary Boiler System<br />
The auxiliary boiler for The Hybrid Option is a natural gas fired watertube packaged boiler with an<br />
integral s<strong>up</strong>erheater. The auxiliary boiler is equipped with single or double low-NOX burners, a forced<br />
draft fan <strong>and</strong> a stack. The following ratings apply to the auxiliary boiler:<br />
• Boiler Capacity – To be determined<br />
• Design Pressure – 400 psig<br />
• Operating Pressure – 300 psig<br />
• SH Steam Temperature – 520 °F<br />
• Feedwater Temperature - 228 °F<br />
The auxiliary boiler system is s<strong>up</strong>plied with s<strong>up</strong>port equipment including a deaerator, feedwater pumps,<br />
blowdown tank, chemical feed equipment, instrumentation <strong>and</strong> associated control system for independent<br />
operation.<br />
1.5.3 Auxiliary Steam Attemperating Valves<br />
The main steam <strong>and</strong> the cold reheat auxiliary steam attemperating valve conditions s<strong>up</strong>erheated main<br />
steam to maintain a nominal pressure of 150 psig at a temperature of approximately 520 oF. The<br />
condensate system provides attemperating water spray via a temperature control valve to maintain the<br />
required steam conditions at setpoint.<br />
1.5.4 Air Ejectors<br />
The existing Unit 4 air removal system will remain in service<br />
1.5.5 Steam Turbine Gl<strong>and</strong> Sealing Steam<br />
The existing Unit 4 steam turbine gl<strong>and</strong> sealing system will remain in service.<br />
1.6 Condensate<br />
Refer to PID-04-01A <strong>and</strong> 04-01B in <strong>Appendix</strong> III.<br />
The Condensate Systems for the Northport Hybrid Option each have two 100 percent condensate pumps.<br />
The second condensate pump is started for steam turbine bypass operation. The new condensate pumps<br />
will replace the existing pumps in the same location.<br />
The 100 percent capacity vertical turbine-type centrifugal condensate pumps, set in suction cans, take<br />
suction from the condenser hotwell through individual suction lines <strong>and</strong> hotwell connections. The<br />
Condensate System s<strong>up</strong>plies condensate to both electric <strong>and</strong> steam air ejectors, gl<strong>and</strong> steam condenser, LP<br />
economizers of each HRSG, auxiliary steam des<strong>up</strong>erheater, hot reheat <strong>and</strong> LP steam bypass valves,<br />
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