ATWS Parameter Studies for a Tight-Lattice PWR

  • H. Amm
  • G. Frei
  • M. Dalle Donne
  • J. M. Kallfelz
  • H. Küsters


The ATWS behaviour of a tight-lattice (high converter) PWR core in a Kraftwerk Union PWR system is investigated. ATWS results are given for a parameter study of tight-lattice core performance variables which differ appreciably from those of a standard PWR, e. g. the moderator density coefficient, the Doppler coefficient, and the soluble boron worth. For the more favorable of the moderator density coefficient cases considered, the allowable limit for the coolant pressure is not exceeded. For a less favorable density coefficient, coolant pressure is maintained below the allowable limit by increasing the pressurizer relief capacity. To insure reactor shutdown capability, an appreciable increase in the soluble boron concentration of the water injected by the safety systems is necessary.


Boron Concentration Allowable Limit Safety Valve Pressurize Water Reactor Coolant Flow Rate 
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Copyright information

© Springer Science+Business Media New York 1984

Authors and Affiliations

  • H. Amm
    • 1
  • G. Frei
    • 1
  • M. Dalle Donne
    • 2
  • J. M. Kallfelz
    • 2
    • 3
  • H. Küsters
    • 2
  1. 1.Kraftwerk Union AGErlangenFed. Rep. Germany
  2. 2.Kernforschungszentrum KarlsruheKarlsruheFed. Rep. Germany
  3. 3.Georgia Institute of TechnologyAtlantaUSA

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