Analysis of a Boron Dilution Accident for WWER-440 Combining the Use of the codes DYN3D and SiTAP


Analysis of a Boron Dilution Accident for WWER-440 Combining the Use of the codes DYN3D and SiTAP

Rohde, U.; Elkin, I.; Kalinenko, V.

The existence of Main Isolating Valves (MIV) in the hot leg and the cold leg of each primary circuit loop is a special feature of WWER­440 type reactors. MIV's availability permits the disconnection of any loop during the work of all others, for example, in the case of leaks. The connection of a previous disconnected loop is a potential way for inducing a boron dilution accident, when infringements of rules and failure of technical systems occur. By combining the use of the codes SiTAP and DYN3D, more realistic boundary conditions were obtained than in previous investigations, were a plug of water with diluted boron concentration was supposed to travel through the core while keeping the other boundary conditions constant.

  • Lecture (Conference)
    Jahrestagung Kerntechnik, Nürnberg, 16. -18. Mai 1995, pp. 111 - 114
  • Contribution to proceedings
    Jahrestagung Kerntechnik, Nürnberg, 16. -18. Mai 1995, pp. 111 - 114

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Publ.-Id: 1782