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NS SAVANNAH - CONTROL ROOM

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The main control console is a nerve center whose primary function is to monitor, display and control all the essential functions pertaining to the ship's nuclear reactor, propulsion system, and electrical power plant including related auxiliary systems. While the main control console is physically a single unit, functionally it is divided as follows when facing the operating, indicating and recording surfaces.

(a) Left Wing Panel and Desk:
This area include switches, lights and position indicating gages for establishing the initial, noncritical, positions of all 21 nuclear Reactor control rods.

(b) Left 45° Angle Corner Panel and Desk:
This area contain operating and indicating elements for:
(1) Primary Purification,
(2) Buffer Seal,
(3) Intermediate Cooling Water,
(4) Pressurizer (Operation only),
(5) Pressure Relief, and
(6) Containment Vessel Cooling and Pressure.

(c) Left Center Panel and Desk:
The upper 75 percent of this panel includes a graphic presentation of indicating and controlling elements for most of the items (b) above.

The lower 25 percent of the Left Center Panel and Desk includes all elements for final control of the Nuclear Reactor control rods. Gages are also included in this console section to show the position of individual rods, or of groups of rods. The other gages show power level and period.

Switches are included to operate rods individually or in groups and to choose which group sequence is desired.

Other switches located here, can deactivate individual rods or groups.

A switch is provided for travel speed of individual rods or groups.

Three major switches are the:
(1) "Start-Run" switch, employed after desired sub-critical rod positions are realized and the reactor is about to become critical;

(2) The "Fast Insertion" switch used to temporarily decrease reactor power output while overcoming small maladjustments; and

(3) The "Scram" switch to fully insert all rods and totally deactivate the reactor power output. This switch is used only when major system piping is ruptured, main pumps fail, ship is in collision, etc.

(d) Right Center Panel and Desk:
The upper 75 percent of this panel includes a graphic presentation of indicating and controlling elements for conditions listed under (c) above for the following systems:
(1) Secondary System and Condensate Systems, and
(2) Secondary System and Propulsion Units.

The lower 25 percent of this panel contains the Central Control Room, Engine Order Telegraph with two selector switches for receipt of signals from the Navigating Bridge or Stern Docking Bridge. In addition, the Shaft Revolution Counter is located in this area.

The Right Center Desk includes the Master Main Throttle Unit which automatically operates the "Forward", "Astern" and Guardian valves

(e) Right 45° Angle Corner Panel and Desk:
The upper 75 percent of this panel contains a graphic presentation of the ships main electrical distribution system buses, transfer switches, breakers, transformers, voltmeters and ammeters. The lower 25 percent of this panel contains push buttons for operation of the Main Propulsion Injection Valve, Circulation Pump Suction Valve, Pump and Overboard Discharge Valves.

In addition, this panel section includes level, pressure and temperature indication for the following systems:
(1) Equipment Drain and Waste (tanks),
(2) Lubricating Oil,
(3) Salt Water Pumping,
(4) Low Pressure Steam Generation,
(5) Diesel Generator (air starting),
(6) Auxiliary Condensate,
(7) Instrument Air Supply, and
(8) Air Ejection.

The Right Angle Desk includes push buttons and indicating lights for the desired operation of valves, pumps, etc., integral with the eight above systems listed above.

(f) Right Wing Panel and Desk:
With one exception, the Emergency Cooling System, main switchover push button, this console area includes all necessary pressure and temperature indication and operating control for the Gaseous Waste and Disposal System. The purpose of this system is to decontaminate any gases created throughout the ship's piping and pumps and certain areas directly or indirectly in contact with the reactor fission products.

General:

An annunciator section extends over the top of the entire console. These alarms are for the systems located on the panels and desk sections directly below the annunciator.
 

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Version 1.01, 4 Apr 09