Hwang Choe - Saratoga CA, US Jose Casillas - Cupertino CA, US Sig Wolf - Sunnyvale CA, US Mark Colby - Wilmington NC, US
International Classification:
G21C019/28 G21C015/00
US Classification:
376/373000
Abstract:
A nuclear reactor core is provided that includes a plurality of fuel assemblies. In an exemplary embodiment, each fuel assembly includes a main coolant flow channel having an inlet. The plurality of fuel assemblies are arranged into at least three regions within the core. The flow channels are configured so that the flow of coolant through the main coolant flow channels of the fuel assemblies located in a particular region are substantially the same, and that the coolant flow through the fuel assemblies in each region is different from the coolant flow through the fuel assemblies in each other region.
Richard A. Wolters - San Jose CA Mark J. Colby - San Jose CA Robert B. Elkins - San Jose CA
Assignee:
General Electric Company - San Jose CA
International Classification:
G21C 1500 G21C 700
US Classification:
376353
Abstract:
In a boiling water reactor (BWR) of the D-lattice type an improved apparatus and method for the mounting of a nuclear fuel assembly is disclosed. Specifically, a D-lattice nuclear fuel assembly is diagonally displaced at the top and diagonally displaced at the bottom to and toward the cruciform shaped control rod interstices. Displacement at the bottom end of the nuclear fuel assembly occurs by an eccentrically centered lower tie plate and fluid inlet for fitting to the core plate at the bottom end of the assembly. Displacement at the top end of the nuclear fuel assembly occurs by shims in the vicinity of the upper end of the channel at the top guides. The disclosed channel assembly is capable of installation during refueling cycles, with a displaced channel being substituted for prior art conventional D-lattice channels. Substitution of one displaced channel occurs with each refueling cycle in a group of four channels. Consequently, there results at the end a maximum of four refueling cycles, complete installation of the displaced channels.
Two-Phase Pressure Drop Reduction Bwr Assembly Design
Gary E. Dix - Saratoga CA Russell L. Crowther - Saratoga CA Mark J. Colby - San Jose CA Bruce Matzner - San Jose CA Robert B. Elkins - San Jose CA
Assignee:
General Electric Company - San Jose CA
International Classification:
G21C 1500
US Classification:
376370
Abstract:
In a boiling water reactor having discrete bundles of fuel rods confined within channel enclosed fuel assemblies, an improved fuel design of bundles of fuel rods interior of the channels is disclosed. Specifically, partial length rods are utilized which extend from the bottom of the channel only part way to the top of the channel. These partial length rods are shortened with respect to the remaining rods and are symmetrically distributed throughout the fuel bundle with the preferred disposition being in the second row of the bundle of fuel rods from the channel wall. The symmetrical distribution of the partial length rods is at spaced apart locations one from another. The partial length rods extend from the bottom of the fuel bundle and terminate within the boiling region. during shutdown of the reactor, an improved cold shutdown margin is produced at the top of the fuel assembly due to the improved moderator-to-fuel ratio and reduction in plutonium formation at the upper portion of the bundle. Shutdown control rod worth is improved due to greater moderator-to-fuel ratio and a longer thermal neutron diffusion length.
Two-Phase Pressure Drop Reduction Bwr Assembly Design
Gary E. Dix - Saratoga CA Russell L. Crowther - Saratoga CA Mark J. Colby - San Jose CA Bruce Matzner - San Jose CA Robert B. Elkins - San Jose CA
Assignee:
Hewlett-Packard Company
International Classification:
G21C 1500
US Classification:
376370
Abstract:
In a boiling water reactor having discrete bundles of fuel rods confined within channel enclosed fuel assemblies, an improved fuel design of bundles of fuel rods interior of the channels is disclosed. Specifically, partial length rods are utilized which extend from the bottom of the channel only part way to the top of the channel. These partial length rods are symmetrically distributed throughout the fuel bundle with the preferred disposition being in the second row of the bundle of fuel rods from the channel wall. The symmetrical distribution of the partial length rods is at spaced apart locations one from another. During shutdown of the reactor, an improved cold shutdown margin is produced at the top of the fuel assembly due to the improved moderator-to-fuel ratio and reduction in plutonium formation at the upper portion of the bundle. Shutdown control rod worth is improved due to greater moderator-to-fuel ratio and a longer thermal neutron diffusion length. During power reactor operation, the partial length fuel rods improve flow distributions above the ends of the partial length rods by channeling steam in the open interstitial area between rods above the ends of the partial length rods.
ClearEdge Power - Irvine, Palm Desert, Sunnyvale, CA, Hillsboro, OR, S. Korea, Austria since Jun 2009
Senior Vice President, Field Operations and Service
Ternion Bio Industries since 2012
Advisory Board Member
EDSA Micro Corporation Jun 2008 - Jun 2009
VP / GM
Envision Solar International, Inc. Oct 2007 - May 2008
President, LifeSystems
USS INGRAHAM (FFG 61), US Navy Aug 2003 - Dec 2004
Commanding Officer
Education:
Naval Postgraduate School 1991 - 1993
MSEE, Electrical Engineering
Navy Nuclear Power Training 1985 - 1986
EOOW and PNEO, Nuclear Power Plant Operations
United States Naval Academy 1981 - 1985
BS, Mathematics
Skills:
Solar Pv Team Building Nuclear Power Plants Supplies Shiphandling Chemistry Persian Field Service Engineering Sales Customer Retention Jet Fuel It Connectivity Construction Internal Communications Projection World Class Customer Service Customer Support Maintenance Management Renewable Energy Diesel Electric Power Surface Warfare Parking Keys Leadership Row Strategic Partnerships Systems Engineering Pem Fuel Cells Structures Plant Operations Uptime Design For Service Customer Satisfaction Cell Education Reactor Engagements Engineering Navigation Strategy Operations Management Pv Readiness Training Policy Customer Service Root Cause Decommissioning Propulsion Scheduling Product Development Product Launch Emerging Technologies Field Service Venture Capital Software Project Management Options Partnerships Aircraft Inspection Power Systems Photovoltaics Officers Renewals Software Sales Management Business Acumen Logistics International Logistics Business Development Schedules Modeling Energy Strategic Planning Fleet Operations Command Nuclear Engineering Maintenance Electricians Sma Senior Executive Leadership Electrical Engineering Missions National Security Safeguard Software Sales Information Speed Security Clearance Surface New Technology Plants Strategic Communications Cep Water Chemistry Weather Electrical Power Nuclear Fuel Cells Executive Management Hydrogen Fuel Cells Root Cause Analysis Food Navy Resources Hr Energy System Provisioning Process Improvement Materials Software Naval Operations Award Winner Net Promoter Score Field Operations Fleets Business Planning Vessels Agents Military Ships New Product Introduction Budgets Interpersonal Skills Business Strategy Technician Power Plants Nuclear Chemistry
Interests:
Football Collecting Antiques Exercise Sweepstakes Nuclear Home Improvement Reading Gourmet Cooking Sports Watching Basketball Vehicle To Grid The Arts Food Home Decoration Health Watching Sports Photograph Children Cooking Cruises Electronics Education Environment Baseball Crafts Science and Technology Fitness Music Human Rights Dogs Movies Micro Grids Collecting Energy Technologies and Funding Wind Medicine Civil Rights and Social Action Diet Disaster and Humanitarian Relief Travel Renewables Wine Watching Baseball Energy Storage Energy Technologies Economic Empowerment Investing Emerging Technologies Traveling Television Basketball Strategic Partnering and Alliances Stamp Collecting Animal Welfare Sports Memorabilia Collecting Watching Football
Languages:
English
Certifications:
Navy Nuclear Power - Pneo Navy Nuclear Power - Pco