CRDM internal electrical connector and method of use thereof

    公开(公告)号:US10943705B2

    公开(公告)日:2021-03-09

    申请号:US15911763

    申请日:2018-03-05

    申请人: BWXT mPower, Inc.

    摘要: A method including providing an internal control rod drive mechanism (CRDM) including an electric motor and a support surface including sealed electrical connectors electrically connected with the electric motor to deliver electrical power to the electrical motor, installing the internal CRDM inside a nuclear reactor, the installing including placing the support surface of the internal CRDM onto a support element inside the nuclear reactor, the placing causing sealed electrical connectors disposed on the support element to mate with the sealed electrical connectors on the support surface of the internal CRDM, wherein the nuclear reactor contains coolant water and the installing is performed with the internal CRDM submerged in the coolant water and the seals of the sealed electrical connectors of the internal CRDM and the support element are effective to prevent coolant water ingress into the sealed electrical connectors.

    Riser cone apparatus to provide compliance between reactor components and minimize reactor coolant bypass flow

    公开(公告)号:US10600520B2

    公开(公告)日:2020-03-24

    申请号:US15483466

    申请日:2017-04-10

    申请人: BWXT mPower, Inc.

    摘要: A riser cone has a lower end sized to engage a cylindrical lower riser section of a nuclear reactor and an upper end sized to engage a cylindrical upper riser section of the nuclear reactor. The riser cone defines a compression sealing ring that is compressed between the lower riser section and the upper riser section in the assembled nuclear reactor. In some embodiments the riser cone comprises: a lower element defining the lower end of the riser cone; an upper element defining the upper end of the riser cone; and a compliance spring compressed between the lower element and the upper element. In some embodiments the riser cone comprises a frustoconical compression sealing ring accommodating a reduced diameter of the upper riser section as compared with the diameter of the lower riser section.

    Method of forming a support structure for a control rod assembly of a nuclear reactor

    公开(公告)号:US10249392B2

    公开(公告)日:2019-04-02

    申请号:US15147262

    申请日:2016-05-05

    申请人: BWXT mPower, Inc.

    摘要: A control rod guide frame comprises a self supporting stack of two or more columnar elements defining a central passage. The columnar elements may include mating features that mate at abutments between adjacent columnar elements of the stack. The control rod guide frame is suitably used in conjunction with a control rod drive mechanism (CRDM) operatively connected with at least one control rod, and a nuclear reactor core, in which the CRDM moves the at least one control rod into and out of the nuclear reactor core under guidance of the control rod guide frame. In another embodiment, a control rod guide frame comprises a stack of two or more columnar elements defining a central passage having a constant cross-section as a function of position along the central passage. In another embodiment, a control rod guide frame comprises an extruded columnar element providing continuous control rod guidance.

    CRDM INTERNAL ELECTRICAL CONNECTOR
    10.
    发明申请

    公开(公告)号:US20180197641A1

    公开(公告)日:2018-07-12

    申请号:US15911763

    申请日:2018-03-05

    申请人: BWXT mPower, Inc.

    IPC分类号: G21C7/12 G21C7/16

    摘要: An internal control rod drive mechanism (CRDM) including an electric motor is disposed in a nuclear reactor and further includes a support surface with sealed electrical connectors electrically connected with the electric motor power the motor. The internal CRDM is disposed on a support element secured inside the nuclear reactor. The support element includes sealed electrical connectors mating with the sealed electrical connectors on the support surface of the internal CRDM to power the electric motor. The sealed electrical connectors may be sealed glass, ceramic, or glass-ceramic connectors welded onto the ends of the MI cables extending from the motor. Springs, are disposed between the mating sealed electrical connectors of the support element and the support surface. A purge line is integrated with each mated connection.