FAIL-SAFE AND COINCIDENCE CIRCUITRY ON REACTOR SAFETY SYSTEM

Proposed revisions for the safety system on the N.S. Savannah include fail-safe circuitry to ensure scram action whenever scram conditions exist, and coincident circuitry to require two of three signals prior to scram to prevent spurious outages. Fail-safe circuitry will initiate a scram signal in the event a circuit or channel cannot carry one. Applied to two out of three coincident circuitry, a scram must be initiated on an auctioneered basis involving the remaining two channels after failure of any one channel. Existing nuclear scram circuits are not considered adequately fail-safe for operation of the N.S. Savannah.

  • Supplemental Notes:
    • This document is available for review at the Department of Commerce Library, Main Commerce Building, Washington, D.C., under reference number ESI-27 A&B-1.
  • Corporate Authors:

    Ebasco Services Incorporated

    Two Rector Street
    New York, NY  USA 

    States Marine Lines, Incorporated

    ,    
  • Publication Date: 1961-4-13

Media Info

  • Pagination: 19 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00026238
  • Record Type: Publication
  • Source Agency: Maritime Administration
  • Report/Paper Numbers: ESI-27 A&B-1 Intrm Rpt
  • Contract Numbers: MA-1889
  • Files: TRIS, USDOT
  • Created Date: Feb 6 1974 12:00AM