A system for controlling the power level of a natural circulation boiling water nuclear reactor (NCBWR) is disclosed. The system, in accordance with an example embodiment of the present invention, may include a controller configured to control a power output level of the NCBWR by controlling a heating subsystem to adjust a temperature of feedwater …

Legal parties

Inventors (applicants): Stephan Craig Moen, Jack Patrick Noonan, Pradip Saha
Assignees (initial): GE-Hitachi Nuclear Energy Americas LLC (Wilmington, US)
Agents: Harness, Dickey & Pierce, P.L.C. (attorney)

The application was examined by Jack W Keith (USPTO dept. 4187), Kimberly E Coghill


  • 1. A system for controlling the power level of a natural circulation boiling water nuclear …
  • 2. The system of claim 1 , wherein the heating subsystem further includes …
  • 3. The system of claim 2 , wherein the at least one feedwater heater includes …

Cited documents


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The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present teachings in any way. FIG. 1 is a general schematic …



The present teachings relate to systems and methods for controlling the temperature of recirculation coolant in natural recirculation boiling water nuclear reactors to thereby control the power output by …

Detailed Description

The following description is merely exemplary in nature and is in no way intended to limit the present teachings, application, or uses. Throughout this specification, like reference numerals will be used …

More details about Feedwater Temperature Control Methods and Systems

Miscellaneous patent data

Particularly claims a system for controlling the power level of a natural circulation boiling water…, the inventor's city is Wilmington, state - NC, the published inventor's name is Saha Pradip, the application was published on Jul. 13, 2007, the application number is 11/777,377 (U.S.), the assignee location is Wilmington (US); its organization is GE-Hitachi Nuclear Energy Americas LLC, the grant publication date is Apr. 22, 2014, includes the following drawings: General schematic of a natural, Schematic of the NCBWR shown, Feedwater Temperature Control Methods and Systems, Schematic of the NCBWR shown, the applicant's location - Wilmington, NC, the recorded applicant's name is Pradip Saha, claims 1-17 comprise the invention scope, the claim 1 is exemplary as chosen by the examiner, the assignee classification - a United States company, was examined by Kimberly E Coghill, the assistant, Jack W Keith, the main examiner (4187 USPTO department), the grant publication number is 08705682, the patent grant was extended by 1156 days, developed by Pradip Saha et al., 7 figures depict the invention details, illustrated by 7 drawings, the invention is named Feedwater Temperature Control Methods and Systems, categorized under With Control of Reactor as a primary classification, similar patents are classified under Reactor Structures With Testing or Irradiation Facilities, Promoting flow of the coolant, Means for obtaining differential movement of control elements, Toroidal confinement of plasma, fissile or breeder material in contact with coolant, Moderator, reflector, or coolant materials, control circuitry, the tube passing through the vessel wall, i.e. continuing on both sides of the wall, thermal accumulation or by steam condensation, e.g. ice condensers, Linear confinement, the recorded agent's company is Harness, Dickey & Pierce, P.L.C.

Invention classification information

The invention is classified under With Control of Reactor, by varying flow of coolant through the core, By coolant flow. The designated search classifications include With Control of Reactor.

Patent details
Publication number 08705682
Publication date Apr. 22, 2014
Kind code B2
Application number 11/777,377
Application date Jul. 13, 2007
Application type U
Application series code 11
Extension term 1156
National classification 376/207
Total number of claims 17
Exemplary claims 1
Number of drawings 7
Number of figures 7
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