Project: „Installation of technical plugs made of high temperature proof material for prevention of an early containment bypass in case of a severe accident of Units 5 and 6 of Kozloduy NPP”
Client: „NPP – Kozloduy“
Contract:  № 122000030/26.06.2012
Execution: 2012÷2014

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Description: The implementation of this innovative project provides the solution how to keep the integrity of hermetic volume if serious accident occurs in reactors of type VVER 1000. The design and technology for production of these high temperature proof material plugs have been developed by ATP – Atomtoploproect and so far is the only solution of its type in the world. The contract includes:

  • Development of adapted technological documentation for manufacturing of products – technology vertical plugs, technological horizontal plugs, vertical biological protection. This documentation is prepared on the basis of pre-developed by “ATP Atomtoploproekt” LTD working and technical projects for vertical and horizontal technological plugs of high temperature resistant material and  vertical biological protection all resistant to neutron radiation for a period not less than 30 years. The same goes for bio-security;
  • Production of pilot samples for practicing the process in order to achieve the required characteristics of products;
  • Staged production of technological plugs and biological protection from the corresponding type and size;
  • Manufacturing of a stand for practicing the process of mounting the plugs and biological protection and the process of filling with concrete narrow space between the main pipe of ionization chambers and casings mounted in concrete at elevation of 10.6 m in the relevant area in the shaft of the reactor;
  • Installation of technological plugs and biological protection at  stages of Unit 6 and Unit 5 of Kozloduy NPP;
  • Preparation of reporting documentation for the supply and installation carried out;
  • Preparation of instructions for installation, maintenance, repair and operation.