发明名称 |
Feedwater control over full power range for pressurized water reactor steam generators |
摘要 |
A feedwater control system and method for a pressurized water reactor steam generating system having first and second output signals. The first output signal is determined by first and second input signals, and, when combined with a third input signal automatically controls at least one feedwater pump and first designated valves which regulate water flow from the one or more feedwater pumps to a steam generator when a steam generator steam load and reactor are operating at a first predetermined power level. The first input signal is determined by a downcomer feedwater flow differential pressure. The second input signal is determined by a reactor power level. The third input signal is determined by a steam generator level. The second output signal, determined by a steam generator water level, automatically controls at least one startup feedwater control valve when the steam generator steam load and the reactor are operating at a second predetermined power level. In a preferred embodiment, the first designated valves include at least one economizer feedwater control valve and at least one downcomer feedwater control valve. Also, in a preferred embodiment, the first predetermined power level is between about 5 and about 20 percent, and the second predetermined power level is between zero and about 5 percent.
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申请公布号 |
US6021169(A) |
申请公布日期 |
2000.02.01 |
申请号 |
US19980176799 |
申请日期 |
1998.10.22 |
申请人 |
ABB COMBUSTION ENGINEERING NUCLEAR POWER, INC. |
发明人 |
ROBERTSON, JAMES E.;CHARI, DEVA R.;WILKOSZ, STEPHEN J. |
分类号 |
G21D3/00;F22B35/00;G21D3/14;(IPC1-7):G21C7/32;G21C7/36;G21C7/00 |
主分类号 |
G21D3/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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