Ge-hitachi Nuclear Energy Americas LLC

General Electric Company

Gregory A Francisco

Robert W Whitling

Jack Toshio Matsumoto

Christopher Martin Welsh

William Dale Jones

Michael Joseph Gundrum

Mark D Bardeen

Robert Whitling

A servicing platform for a nuclear reactor refueling floor is provided. In various embodiments, the servicing platform includes a base structured to be anchored to a refueling floor of the nuclear reactor. The servicing platform additionally includes a telescoping mast having a mounting collar at a first end that is rotationally attached to the base, and a personnel work basket pivotally coupled to a second end of the mast.

Reactor servicing platform

A method and apparatus for grasping and lifting a boiling water reactor (BWR) control rod using a grapple. The grapple may grasp the control rod blade, the fuel support casting and the control rod guide tube of the control rod, to lift and move all three of these components in unison. The grapple includes a frame, a control rod blade hook, a fuel support casting hook(s) and a control rod guide tube hook(s). The control rod guide tube hook(s) may have a distal end that extends through a side flow orifice of a fuel support casting and beyond the confines of a control rod guide tube flow orifice to grasp the control rod guide tube. The distal end of the control rod guide tube hook(s) may include inner and outer landing surfaces, providing respective support for the fuel support casting and control rod guide tube.

Method and apparatus for a BWR control rod handling grapple

Disclosed is an unlatching tool that may be used to unlatch a control rod from a control drive. The unlatching tool may include a baseplate, a first guide member and a second guide member attached to the baseplate, a first frame and a second frame attached to the baseplate, a stepper motor attached to the first frame, a worm drive attached to the first frame, a cable reel shaft attached to the first and second frame, a hose wrapped around the cable reel shaft, and a hook attached to a first end of the hose. The hook may include a cylindrical sleeve having a at least one finger configured to fold and unfold. Disclosed also is a method of unlatching a control rod from a control drive.

Control rod blade unlatching tool

A nut assembly for connecting adjoining poles in a nuclear reactor may include an upper nut and a lower nut. The upper nut may include threads on an inner surface of the upper nut. The lower nut may include threads on an inner surface of the lower nut. The lower nut may include threads on an outer surface of the lower nut. The upper nut may rotate over the lower nut in order to lock the lower nut.

Nut assembly for connecting adjoining poles in a nuclear reactor

In various embodiments, the system includes a tubular female end portion of the first pole section and a male end portion of the second pole section that is insertable into the female end portion. Additionally, the system includes a locking nut including a body portion and a neck portion and is threadingly engaged with the male end portion. Furthermore, the system includes a biased locking sleeve assembly that includes a locking sleeve having an internal cavity such that the locking sleeve fits over the locking nut neck portion, and a biasing device located within the interior cavity of the locking sleeve for applying opposing forces to the locking nut and the locking sleeve.

Small handling pole locking assembly

A system and a method for securely connecting, or interlocking two pole sections together to ensure that they do not disconnect during use. The system includes a tubular female end portion of the first pole section and a male end portion of the second pole section that is insertable into the female end portion. The system additionally includes a locking nut threadingly engaged with the male end portion that is rotatable on the male end portion to longitudinally transition the locking nut into contact with the female end portion to fixedly interlock the male and female end portions. Furthermore, the system includes a biased locking sleeve assembly slidably and rotatably mounted on a locking assembly portion of the second pole. The locking sleeve assembly can include a locking sleeve and a biased plunger slidingly positioned within an interior of the locking sleeve for applying a locking force to the locking nut.

An apparatus and method for manufacturing a handling pole including a pole section, a pole adapter connected to one end of the pole section, a spade member connected to the other end of the pole section, and a nut assembly for connecting adjoining poles. The pole adapter may include an upper sleeve and the spade member may include a lower sleeve.

Handling poles for use in nuclear reactors

Systems and method for tensioning jet pump beam bolts in a nuclear reactor are disclosed. The nuclear reactor may include at least one jet pump with each jet pump having a jet pump beam and a jet pump beam bolt. The system may include an actuating apparatus and a tensioning apparatus. The actuating apparatus may include a socket member for engaging the jet pump beam bolts, a sleeve member for engaging a handling pole, and an actuator hex positioned between the socket member and the sleeve member. The tensioning apparatus may include a base block having an opening for accommodating the jet pump beam bolt, a top plate having an opening for accommodating the actuator hex, and a hydraulic actuator for providing tension to the jet pump beam bolt in accordance to measurements of the actuating apparatus.

Apparatus and method for measuring rotation during jet pump tensioning

An apparatus and method for manufacturing a handling pole including a pole section, a pole adapter connected to one end of the pole section, and a spade member connected to the other end of the pole section. The pole adapter may include an upper sleeve and the spade member may include a lower sleeve.

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Fremont, CA, United States of America

Gregory A Francisco