Grant Clark Jensen
Land Surveyors in Morgan Hill, CA

6456682, Sep 24, 2002

Mar 13, 2001

09/681283

Grant Clark Jensen - Morgan Hill CA

General Electric Company - Schenectady NY

G21C 900

376282, 376352, 285191

A core spray sparger T-box attachment assembly for a nuclear reactor pressure vessel includes a downcomer pipe coupling and a sparger T-box clamp. The downcomer pipe coupling includes a cylindrical outer housing, a center portion, and a plurality of vanes extending the outer housing to the center portion. The outer housing is coupled to a downcomer pipe and includes an extending flange. A draw bolt threadedly engages an axial bore in the center portion, and connects the downcomer pipe coupling to the sparger T-box clamp. The sparger T-box clamp includes an anchor having a draw bolt opening, and a plurality of legs extending from a face of the anchor. Clamp blocks are connected to the anchor. Stop bolts extend through stop bolt openings in the clamp blocks. Clamping elements are connected to the clamp blocks by clamp bolts.

6647083, Nov 11, 2003

Aug 21, 2002

10/224429

Grant C. Jensen - Morgan Hill CA

General Electric Company - Schenectady NY

G21C 900

376286, 376372, 376285, 254104

A vibration mitigation clamp apparatus is provided, which is designed to stiffen a riser brace assembly in a nuclear reactor so as to increase the natural vibration frequency of the riser brace assembly. In an embodiment, the vibration mitigation clamp apparatus may include a first plate, a second plate and a wedge assembly. The vibration mitigation clamp apparatus is attached to upper and lower riser brace leaves of the riser brace assembly, at a location near a weld that attaches the leaves to a riser brace block of the riser brace assembly that is affixed to an RPV sidewall. The wedge assembly is expandable to apply forces on inside surfaces of the riser brace leaves, countering clamping forces applied to the first and second plate to fixedly secure the vibration mitigation clamp apparatus on the riser brace assembly.

5521951, May 28, 1996

Sep 23, 1994

8/311300

James E. Charnley - Nevada City CA
John G. Erbes - Mt. View CA
Grant C. Jensen - Morgan Hill CA

General Electric Company - San Jose CA

G21C 1900

376260

A method and an apparatus for repairing a shroud in which one or more shroud girth seam welds have experienced SCC. The method involves the placement of a plurality of brackets around the outer circumference of the shroud at a plurality of azimuthal positions. Each bracket has circular holes for receiving respective tapered pin assemblies. Corresponding circular holes are machined in the shroud wall at positions which will align with the holes in the bracket. Each tapered pin assembly is inserted and then manipulated remotely from outside the shroud. Each tapered pin assembly consists of three types of parts: a threaded tapered pin, a slotted sleeve with a tapered bore, and a threaded nut. When fully installed, the tapered pin is encased by the sleeve. As the tapered pin is tensioned, the sleeve exerts a radially outwardly directed contact pressure on the cylindrical surface of the aligned circular holes respectively formed in the bracket and shroud.

6131962, Oct 17, 2000

Jan 29, 1998

9/015429

Grant Clark Jensen - Morgan Hill CA
Jeffrey Lee Thompson - San Jose CA

General Electric Company - Schenectady NY

F16L 1700

285337

Coupling apparatus and methods for replacing a core spray line downcomer pipe coupled to a shroud T-box are described. In one embodiment, the coupling apparatus includes a seal ring, a mating flange, a housing, at least one coupling bolt, at least one spherical washer, and at least one lateral pin. The thermal expansion coefficient of the coupling bolt is lower than the thermal expansion coefficient of the seal ring, mating flange, and housing. After extending the downcomer pipe into the housing, the seal ring is inserted into the opposite end of the housing adjacent the downcomer pipe. The seal ring is then seated on the mating flange seat. The two seats allow the downcomer pipe to be rotational misaligned with the coupling apparatus. The coupling bolts extend through the mating flange and the housing to rigidly secure the downcomer pipe to the coupling apparatus. Lateral pins extend through the housing and the downcomer pipe to provide vertical and torsional load transfer from the downcomer pipe to the coupling apparatus.

5642955, Jul 1, 1997

Sep 22, 1995

8/532945

Grant Clark Jensen - Morgan Hill CA

General Electric Company - San Jose CA

G21C 1900

403 24

A strongback for lowering a tie rod into the downcomer annulus of a boiling water reactor during a shroud repair operation. The tie rod strongback is suspended from a cable via a cable adaptor at its upper end. The lower end of the strongback is coupled to a tie rod adaptor, which in turn couples to the top of the tie rod. The strongback is a welded assembly of square tubes, channels for reinforcing the joints of the welded tubes, and upper and lower couplings. In particular, the strongback has mutually parallel first and second rigid linear members which are disposed vertically when the strongback is suspended from a plumb cable. The second rigid linear member is connected to the first rigid linear member by a relatively obliquely disposed third rigid linear member. The first and second rigid linear members lie in a vertical plane which is offset from the axis of a plumb cable to allow the strongback assembly to circumvent the core spray downcomer piping when the tie rod/lower spring assembly is in its final position in the annulus. The first rigid linear member is further offset from the second rigid linear member cable axis to allow the strongback assembly to circumvent the feedwater sparger and the core spray header.

5623525, Apr 22, 1997

Sep 22, 1995

8/532190

Grant C. Jensen - Morgan Hill CA

General Electric Company - San Jose CA

G21C 1920

376260

A tool for lifting a tie rod off of the refueling floor and lowering the tie rod into the downcomer annulus of a boiling water reactor during a shroud repair operation. The tie rod lifting tool can be attached to the end of a strongback suspended from a hoisting cable or to the end of the cable itself. One embodiment of the tie rod lifting tool has redundant locking pins which interlock with corresponding holes formed in the end of the tie rod. The locking pins are moved out of locking engagement in response to actuation of respective pneumatic cylinders. The locking pins are latched so that the tie rod cannot be disengaged from the lifting tool unless the latches are first manually released by an operator using a handling pole.

8249212, Aug 21, 2012

Aug 2, 2011

13/196343

Grant Clark Jensen - Morgan Hill CA, US
Robert W. Whitling - Morgan Hill CA, US

General Electric Company - Schenectady NY

G21C 9/00

376277, 376282, 376283

A method for attaching a core spray sparger T-box clamp for a sparger T-box in a shroud of a nuclear reactor pressure vessel assembling the anchor plate, bearing plate and saddle bracket; positioning the assembly of the anchor plate, bearing plate and saddle bracket in front of the T-box such that the saddle bracket is below a sidewall of the T-box; elevating the assembly to seat the saddle bracket against a lower surface of the sidewall and sliding a locating pin on the saddle bracket into an aperture in the sidewall; lowering a carrier plate onto an upper surface of the sidewall and attaching the carrier plate to the anchor plate, wherein a locating pin on the carrier plate slides into an aperture on the upper surface, and advancing the bearing plate to the T-box to bias a bearing plate against a cover plate of the T-box.

7623611, Nov 24, 2009

Feb 23, 2007

11/709772

Grant Clark Jensen - Morgan Hill CA, US

General Electric Company - Schenectady NY

G21C 1/04

376352, 376282, 138 89, 138 97

A core spray T-box attachment assembly for a core spray nozzle includes a primary cruciform wedge and a secondary cruciform wedge in contact with the primary cruciform wedge to form a cruciform wedge subassembly adapted for insertion within a bore of the core spray nozzle to sealingly engage an interior converging portion of a safe end of the core spray nozzle. The assembly includes a spider in contact with the cruciform wedge subassembly, and a draw bolt engaging an axial bore of a center portion of the cruciform wedge subassembly and the spider to the T-box.

8548114, Oct 1, 2013

May 30, 2007

11/755613

Grant C. Jensen - Morgan Hill CA, US

General Electric Company - Schenectady NY

G21C 15/25, F15C 3/10, G21C 15/00

376372, 376347, 376361, 376366, 376370, 376383, 376391, 376392, 376402, 376407, 376463, 248 49, 248 65, 248 681

A jet pump sensing line support clamp may be used for sensing line repair, replacement, and damage prevention or reduction. The clamp may affix to jet pump sensing line supports and confine the individual jet pump sensing lines. The clamp may provide for further access or securing of the lines in the support through the clamp. Methods of installing the clamp may include attaching and tightening the clamp against the sensing lines.

7724863, May 25, 2010

Oct 14, 2004

10/963813

Grant C. Jensen - Morgan Hill CA, US

General Electric Company - Schenectady NY

G21C 1/04

376352, 376204, 376282, 376292, 138 89, 138 97

A core spray sparger T-box attachment assembly for a nuclear reactor pressure vessel, wherein the pressure vessel includes a shroud, a sparger T-box penetrating the shroud, a plurality of sparger distribution header pipes coupled to the sparger T-box, and a downcomer pipe. The sparger header pipes may include at least one sparger nozzle, and the sparger T-box attachment assembly may include a downcomer pipe coupling and a sparger T-box clamp. The sparger T-box clamp may include an anchor plate having a draw bolt opening to receive a draw bolt, a first clamp block substantially aligned at one end of the anchor plate, and a second clamp block substantially aligned at the other end of the anchor plate.