Integral head rig, head area cable tray and missile shield for pressurized water reactor

A nuclear reactor arrangement, comprising:

• a pressure vessel head for closing a pressure vessel;
• a control rod drive mechanism means disposed above said pressure vessel head for controlling the movement of control rods which are selectively extendible between fuel rods which are disposed in an interior of the pressure vessel;
• a cylindrical enclosure member having upper and lower ends, said cylindrical enclosure being disposed about the control rod control means with the lower end connected to a top of the pressure vessel head;
• a missile shield connected to the upper end of the cylindrical member, said missile shield closing the upper end of said cylindrical enclosure;
• and
• connection means rigid with said cylindrical member, for connecting the cylindrical member to lifting means and for lifting said pressure vessel head, said control rod control means, said cylindrical member, and said missile shield, from the pressure vessel as an integral unit, by the lifting means,
• wherein said missile shield comprises:
• a plate which is secured directly to the upper end of said cylindrical enclosure;
• and
• a plurality of ribs rigidly connected to a lower surface of said plate, said plurality of ribs extending into the upper end of said cylindrical enclosure, said ribs being provided with means for clipping said control rod drive mechanism cables to side surfaces of said ribs and for separating said control rod drive mechanism cables into different groups.

A nuclear reactor arrangement comprising:

• a pressure vessel head for closing a pressure vessel;
• a control rod drive mechanism means disposed above said pressure vessel head for controlling the movement of control rods which are selectively extendible between fuel rods which are disposed in an interior of the pressure vessel;
• a cylindrical enclosure member having upper and lower ends, said cylindrical enclosure being disposed about the control rod control means with the lower end connected to a top of the pressure vessel head;
• a missile shield connected to the upper end of the cylindrical member, said missile shield closing the upper end of said cylindrical enclosure;
• and
• connection means rigid with said cylindrical member, for connecting the cylindrical member to lifting means and for lifting said pressure vessel head, said control rod control means, said cylindrical member, and said missile shield, from the pressure vessel as an integral unit, by the lifting means.

A nuclear reactor arrangement comprising:

• a pressure vessel head for closing a pressure vessel;
• a control rod drive mechanism means disposed above said pressure vessel head for controlling the movement of control rods which are selectively extendible between fuel rods which are disposed in an interior of the pressure vessel;
• a cylindrical enclosure member having upper and lower ends, said cylindrical enclosure being disposed about the control rod control means with the lower end connected to a top of the pressure vessel head;
• a missile shield connected to the upper end of the cylindrical member, said missile shield closing the upper end of said cylindrical enclosure;
• and
• connection means rigid with said cylindrical member, for connecting the cylindrical member to lifting means and for lifting said pressure vessel head, said control rod control means, said cylindrical member, and said missile shield, from the pressure vessel as an integral unit, by the lifting means,
• wherein the reactor is disposed within a building having a wall, and further comprising:
• a pivotal bridge cable tray which is pivotally supported on the wall of the building at a location proximate said missile shield;
• and
• a plurality of bridge cables supported on said bridge cable tray, said plurality of bridge cables being operatively connected with said plurality of control rod drive mechanism cables, and
• wherein said missile shield is provided with peripheral tray means about which said control rod drive mechanism cables can be wound and disposed in a manner which facilitates connection with said bridge cables.