SYSTEM TO CONTROL EMERGENCY “COOLANT LEAK FROM A PRIMARY CIRCUIT TO A SECONDARY ONE WITH THE EQUIVALENT SECTION Dy 100”

The SUA TPKV system to control emergency “Coolant leak from a primary circuit to a secondary one with the equivalent section Dy 100” is intended to diagnose leaks from a primary circuit to a secondary one of NPP unit, identify emergency steam generators, and automate their localization algorithm.

Functions of SUA TPKV:

  • measuring direct steam radioactivity in steam generators;
  • receiving and primarily processing analog and discrete signals from adjacent systems (normal operation systems, safety control systems, reactor trip systems, MCR);
  • carrying out calculation and logical operations in accordance with an emergency control algorithm approved by the regulator in the nuclear power engineering;
  • forming and delivering SNE, USB actuator control commands (signals of switching on, prohibition of switching on);
  • signaling on system operation in control rooms;
  • transmitting data on technological parameter values, equipment state, and self-diagnostics results into IVS.

Composition of SUA TPKV:

  • four data acquiring and processing devices based on industrial controllers of MSKU series;
  • LAN switchboards, an engineering-diagnostic station, and a remote diagnostic station based on PS5140 workstations.

System dvantages:

  • decrease of quantity of manual operations fulfilled by operating personnel and minimization of possible personnel’s wrong actions in case of emergency;
  • reliable isolation of a damaged steam generator;
  • elimination of possibility of steam-release devices operation of a faulty steam generator on steam-water mixture and water, avoidance of release of primary circuit radioactive coolant to the environment;
  • reliability of measurement results due to use of three detection units for each steam generator;
  • possibility of autonomous check of functioning by means of signal simulation on inputs of accident control algorithms with displaying a checking process on a block diagram of a checked algorithm;
  • possibility of integration of SUA TPKV and USBT.

Safety class – 3.
Safety category – В.

Implementation facilities:

  • Zaporizhzhya NPP, units 1, 2
  • Khmelnitsky NPP, unit 2
  • Rivne NPP, unit 4
SRPA “Impulse” is a leading Ukrainian designer, manufacturer, and supplier of highly-reliable instrumentation and control systems for nuclear power engineering and railways.
 
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