NS SAVANNAH, REPORT ON CONTROL ROD ACCUMULATOR PRESSURE ALARM CIRCUITRY

Proposed revision of the gas pressure, hydraulic pressure, and liquid detector alarm circuits on each of the control rod devices will enable the operators to determine when any number of alarms up to a total of five have occurred for each of the three functions. In the present system, when a rod has an accumulator malfunction, a switch is thrown on the control rod drive cubicle to silence the alarm on the main console. This energizes a relay to set up a continuous alarm circuit whenever a second switch is thrown. Thus, when the second rod has the same accumulator malfunction an alarm sounds immediately and continues after the switch on the second rod has been thrown. It is proposed to redesign this alarm circuit so that throwing the switch on the second, third, or fourth rod that has the same malfunction will silence the control room alarm each time and also light the respective indicating light on the rod cubicle. The circuit would produce a continuous alarm when the fifth rod had the same malfunction in the accumulator. A schematic of the proposed circuit is provided.

• Supplemental Notes:
  • This document is available for review at the Department of Commerce Library, Main Commerce Building, Washington, D.C., under reference number ESI-31-1.
• Corporate Authors:

  Ebasco Services Incorporated

  Two Rector Street
  New York, NY  United States 

  States Marine Lines, Incorporated

  ,    
• Publication Date: 1961-5-5

Media Info

• Features: Figures;
• Pagination: 7 p.

Subject/Index Terms

• TRT Terms: Alarm systems; Control systems; Instrumentation; Nuclear power plants; Nuclear powered ships; Nuclear reactors
• Old TRIS Terms: Nuclear reactor control systems; Nuclear reactor instrumentation
• Subject Areas: Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00026348
• Record Type: Publication
• Source Agency: Maritime Administration
• Report/Paper Numbers: ESI-31-1 Intrm Rpt
• Contract Numbers: MA-1889
• Files: TRIS, USDOT
• Created Date: Feb 14 1973 12:00AM