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George S Pabis

from Lynchburg, VA
Age ~58

George Pabis Phones & Addresses

  • 2109 Mimosa Dr, Lynchburg, VA 24503 (434) 384-4965
  • Bedford, VA
  • Warrenton, VA

Work

Company: Novatech Position: Principal engineer

Education

School / High School: Virginia Tech 1984 to 1989 Specialities: Mechanical Engineering

Skills

Ansys • Ls Dyna

Industries

Utilities

Resumes

Resumes

George Pabis Photo 1

Principal Engineer

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Location:
Lynchburg, VA
Industry:
Utilities
Work:
Novatech
Principal Engineer
Education:
Virginia Tech 1984 - 1989
Skills:
Ansys
Ls Dyna

Publications

Us Patents

Fuel Assembly Nozzleless Handling Tool And Method

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US Patent:
7424084, Sep 9, 2008
Filed:
Jun 11, 2007
Appl. No.:
11/811740
Inventors:
George S. Pabis - Lynchburg VA, US
Darel R. Clark - Lynchburg VA, US
Anthony A. Pugh - Forest VA, US
Raymond A. King - Lynchburg VA, US
Assignee:
Areva NP Inc. - Lynchburg VA
International Classification:
G21C 19/00
US Classification:
376264, 376261, 376265, 376267, 376268
Abstract:
A device and method to move a fuel assembly of a nuclear reactor, wherein the device eliminates the potential for dropping the fuel assembly due to stress corrosion cracking of the upper guide thimble sleeves that attach the top nozzle to guide thimbles.

Fuel Assembly Top Nozzle Repair Sleeve And Method For Repairing A Fuel Assembly

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US Patent:
7551705, Jun 23, 2009
Filed:
Dec 11, 2003
Appl. No.:
10/733213
Inventors:
George S. Pabis - Lynchburg VA, US
Anthony A. Pugh - Forest VA, US
Raymond A. King - Lynchburg VA, US
Darel R. Clark - Lynchburg VA, US
Assignee:
Areva NP, Inc. - Lynchburg VA
International Classification:
G21C 19/00
US Classification:
376261, 376260, 376446, 376451
Abstract:
A method and device to repair nuclear fuel assembly structural defects in the top nozzle to guide thimble connection, wherein the device includes a repair sleeve comprising tendons configured to deflect to allow establishment of a structural connection between a projection on each tendon and a dimple area of a guide thimble.

Fuel Assembly Nozzleless Handling Tool And Method

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US Patent:
20050135540, Jun 23, 2005
Filed:
Nov 17, 2003
Appl. No.:
10/714756
Inventors:
George Pabis - Lynchburg VA, US
Darel Clark - Lynchburg VA, US
Anthony Pugh - Forest VA, US
Raymond King - Lynchburg VA, US
International Classification:
G21C019/00
US Classification:
376268000
Abstract:
A device and method to move a fuel assembly of a nuclear reactor, wherein the device eliminates the potential for dropping the fuel assembly due to stress corrosion cracking of the upper guide thimble sleeves that attach the top nozzle to guide thimbles.

Spacer Grid

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US Patent:
20130202077, Aug 8, 2013
Filed:
Feb 2, 2012
Appl. No.:
13/364769
Inventors:
Lewis A Walton - Forest VA, US
George S. Pabis - Lynchburg VA, US
Andrew W. Doan - Lynchburg VA, US
James G. Hatmaker - Lynchburg VA, US
International Classification:
G21C 3/352
G21C 3/34
US Classification:
376442
Abstract:
A spacer grid includes interlocked straps comprising metal sheets or plates welded together to define a spacer grid having a top and bottom. The interlocked straps define a plurality of cells comprising vertical passages connecting the top and bottom of the spacer grid. The cells include: upper dimples proximate to the top of the spacer grid and distal from the mid-plane of the spacer grid; lower dimples proximate to the bottom of the spacer grid and distal from the mid-plane of the spacer grid; cantilevered upper springs having fuel rod engagement surfaces proximate to the top of the spacer grid and distal from the mid-plane of the spacer grid; and cantilevered lower springs having fuel rod engagement surfaces proximate to the bottom of the spacer grid and distal from the mid-plane of the spacer grid.

Lower End Fitting For Nuclear Fuel Assembly Made From Intersecting Metal Strips

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US Patent:
20130272479, Oct 17, 2013
Filed:
Aug 29, 2012
Appl. No.:
13/597838
Inventors:
Jeffrey T Lee - Forest VA, US
Roger R. Ridgeway - Lynchburg VA, US
George S. Pabis - Lynchburg VA, US
International Classification:
G21C 3/33
US Classification:
376440
Abstract:
A fuel assembly including a plurality of fuel rods arranged mutually in parallel wherein the fuel rods include a fissile material, a plurality of guide tubes arranged in parallel with and interspersed amongst the fuel rods, an upper end fitting connected with upper ends of the guide tubes, and a lower end fitting connected with lower ends of the guide tubes. At least one of the upper end fitting and the lower end fitting includes a grid formed by interlocking metal strips secured together at intersections between the metal strips.

Pulse Arc Welding Of Spacer Grids To Guide Tubes

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US Patent:
20130301791, Nov 14, 2013
Filed:
Apr 16, 2013
Appl. No.:
13/864168
Inventors:
BABCOCK & WILCOX MPOWER, INC. - , US
Lewis A. WALTON - Forest VA, US
James G. HATMAKER - Lynchburg VA, US
George S. PABIS - Lynchburg VA, US
International Classification:
G21C 3/356
G21C 21/00
B23K 9/09
US Classification:
376442, 21913051
Abstract:
A structural skeleton of a nuclear fuel assembly is assembled by inserting guide tubes through a plurality of spacer grids, and performing pulse arc welding to connect the inserted guide tubes and the spacer grids. In the structural skeleton, the spacer grids may comprise intersecting grid straps, and at least some of the grid straps may include tabs that are pulse arc welded to guide tubes. The structural skeleton may include grid retaining rings installed on the guide tubes and pinning some spacer grids, with the grid retaining rings being pulse arc welded to guide tubes. A fuel assembly includes the structural skeleton, a plurality of fuel rods comprising fissile material passing through the spacer grids, and upper and lower end fittings secured to upper and lower ends, respectively, of the guide tubes.

Small Modular Reactor Fuel Assembly

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US Patent:
20180261341, Sep 13, 2018
Filed:
May 9, 2018
Appl. No.:
15/974888
Inventors:
- Charlotte NC, US
George S. Pabis - Lynchburg VA, US
Julius M. Ullmann - Forest VA, US
Jean H. Raas - Lynchburg VA, US
Martha A. Gilliam - Lynchburg VA, US
Anne R. Austin - Forest VA, US
Eric A. Barringer - Rustburg VA, US
International Classification:
G21C 13/024
G21C 13/02
G21C 7/08
G21C 1/32
G21C 3/33
Abstract:
A pressurized water reactor (PWR) comprises a pressure vessel containing primary coolant water. A nuclear reactor core is disposed in the pressure vessel and includes a plurality of fuel assemblies. Each fuel assembly includes a plurality of fuel rods containing a fissile material. A control system includes a plurality of control rod assemblies (CRA's). Each CRA is guided by a corresponding CRA guide structure. A support element is disposed above the CRA guide structures and supports the CRA guide structures. The pressure vessel may be cylindrical, and the support element may comprise a support plate having a circular periphery supported by the cylindrical pressure vessel. The CRA guide structures suitably hang downward from the support plate. The lower end of each CRA guide structure may include alignment features that engage corresponding alignment features of the upper end of the corresponding fuel assembly.

Spacer Grid

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US Patent:
20170213605, Jul 27, 2017
Filed:
Apr 10, 2017
Appl. No.:
15/483352
Inventors:
- Charlotte NC, US
George S. Pabis - Lynchburg VA, US
Andrew W. Doan - Lynchburg VA, US
James G. Hatmaker - Lynchburg VA, US
International Classification:
G21C 3/352
G21C 3/356
Abstract:
A spacer grid includes interlocked straps comprising metal sheets or plates welded together to define a spacer grid having a top and bottom. The interlocked straps define a plurality of cells comprising vertical passages connecting the top and bottom of the spacer grid. The cells include: upper dimples proximate to the top of the spacer grid and distal from the mid-plane of the spacer grid; lower dimples proximate to the bottom of the spacer grid and distal from the mid-plane of the spacer grid; cantilevered upper springs having fuel rod engagement surfaces proximate to the top of the spacer grid and distal from the mid-plane of the spacer grid; and cantilevered lower springs having fuel rod engagement surfaces proximate to the bottom of the spacer grid and distal from the mid-plane of the spacer grid.
George S Pabis from Lynchburg, VA, age ~58 Get Report