Refueling bridge with service elevator for well wall maintenance

Claim 2

A refueling bridge for a reactor well with a reactor pressure vessel in the reactor well comprising: a. a superstructure extending across the reactor well and supported by surfaces adjacent to the reactor well; b. a service platform having a length enabling it to fit within the well supported on the superstructure; c. means for controllably raising and lowering said service platform relative to the superstructure; said service platform being constructed to support personnel to provide access by said personnel to the well interior; d. end extensions mounted on the service platform; e. and means for controllably moving laterally the end extensions relative to the service platform.

Claim 3

A refueling bridge as claimed in claim 1 wherein the end extensions comprise a platform sized to support personnel.

Claim 4

A refueling bridge as claimed in claim 2 wherein wall cleaning means are mounted on the end extensions for lateral movement therewith.

Claim 5

A refueling bridge as claimed in claim 3, wherein the wall cleaning means comprises power-driven brushes mounted on the end extensions and projecting laterally away from the extensions.

Claim 6

A refueling bridge as claimed in claim 4, wherein the brushes are pivotably mounted on the end extensions for radial movement relative thereto.

Claim 7

A refueling bridge as claimed in claim 5, wherein the brushes are mounted at the bottom of the end extensions.

Claim 8

A refueling bridge as claimed in claim 6, wherein means are provided for supplying fresh water to the brushes.

Claim 9

Apparatus for providing access to equipment and parts of a nuclear reactor well sunk below a floor level and containing within the well a reactor pressure vessel, comprising a bridge superstructure having uprights supported on the floor level at opposite sides of the reactor well and upright connecting means extending over and across the reactor well, means for moving the bridge superstructure along the floor in a horizontal direction relative to the reactor well, an elongated platform for personnel having a length enabling it to fit within the reactor well, means connected to the platform for supporting same on the upright connecting means of the superstructure, means for moving the platform upward and downward relative to the superstructure and down into the reactor well to enable personnel on the platform to have access to the reactor well, a walkway extending across the bridge superstructure, platform extensions mounted at opposite ends of the platform, said extensions being sized to support personnel, means for laterally moving the extensions toward and away from the reactor well walls, and well wall maintenance implements mounted on tHe end extensions for lateral movement therewith, whereby the well walls can be subjected to maintenance operations under the close supervision of personnel on the platform extensions.

Claim 10

Apparatus for providing access to equipment and parts of a nuclear reactor well sunk below a floor level and containing within the well a reactor pressure vessel, comprising a bridge superstructure having uprights supported on the floor level at opposite sides of the reactor well and upright connecting means extending over and across the reactor well, means for moving the bridge superstructure along the floor in a horizontal direction relative to the reactor well, an elongated platform for personnel having a length enabling it to fit within the reactor well, means connected to the platform for supporting same on the upright connecting means of the superstructure, means for moving the platform upward and downward relative to the superstructure and down into the reactor well to enable personnel on the platform to have access to the reactor well, a walkway extending across the bridge superstructure, platform extensions mounted at opposite ends of the platform, said extensions being sized to support personnel, means for laterally moving the extensions toward and away from the reactor well walls, and well wall maintenance implements mounted on tHe end extensions for lateral movement therewith, whereby the well walls can be subjected to maintenance operations under the close supervision of personnel on the platform extensions.

Claim 11

Apparatus as claimed in claim 8 and further comprising a first railing substantially enclosing the platform, and separate railings substantially enclosing each of the platform extensions.