Bohunice NPP – Slovakia

Published: May 19, 2014

Bohunice NPP site © Javys

 

Phase 2 of the Decommissioning & Dismantling of BOHUNICE V1 NPP is planned for January 2015 – requiring complex licensing documentation to be completed and approved. A preview of many nuclear projects to come, Tractebel Engineering is working hard on its share of this joint venture, high-pace mission.

BOHUNICE PREPARES FOR DECOMMISSIONING

Two nuclear power plants (NPP), V1 and V2, are located at the Bohunice site. Both plants contain two VVER-440 (a Soviet design PWR) reactor units. V2 NPP is still operating. But the V1 units, owned by Slovakian state utility JAVYS, were shut down in 2006 and 2008. Now the goal is to release the site for new use. Read more

A CONSORTIUM CONTRACT

Given the need to follow strict procedures and meet a set deadline on a site where activity is already taking place (potentially impacting the data set and influencing the licensing documents), Tractebel Engineering is involved in the Bohunice project within a high-level European consortium. Read more

EXPERTISE TAKES A “CENTRALE” ROLE

Many integrated nuclear and infrastructure competences are valuable in such a planning project, but given its knowledge of available technologies and proven methodologies Tractebel Engineering is specifically responsible for 5 of the major tasks essential to achieving the necessary licensing to fully decommission a NPP. Read more


Bohunice NPP-cooling towers © Javys

BOHUNICE PREPARES FOR DECOMMISSIONING

Two nuclear power plants (NPP), V1 and V2, are located at the Bohunice site. Both plants contain two VVER-440 (a Soviet design PWR) reactor units. V2 NPP is still operating. The V1 units, owned by Slovakian state utility JAVYS, were shut down in 2006 and 2008. Now the goal is to release the site for new use.

A SECOND LICENSE NEEDED
Within an approved strategy for Bohunice V1 full decommissioning, the removal of inactive components and neutral structures (cooling towers, offices, turbine hall etc.), began in 2011 under a license that is valid to end 2014. By January 2015 a 2nd license is needed to proceed with the more complex decontamination and dismantling of radioactive components and demolition of the remaining structures.

3 PROJECT OBJECTIVES
Begun mid 2013, the project is funded through a grant from the European Bank for Reconstruction & Development (EBRD).  Focussed on the description and assessment of all technical processes planned for Phase 2, many deliverables need to be achieved as quickly as possible (allowing time for critical licensing discussions and approval) to meet 3 key objectives:

  • Prepare, review or update the licensing documents in line with international standards and to meet the requirements of the Nuclear Regulatory Authorities of the Slovak Republic (NRA SR);
  • Develop the analysis, studies and assessments from an engineering and licensing point of view;
  • Support and assist JAVYS in discussions with NRA SR and justification of documentation.

Bohunice NPP-reactor building © Javys

A CONSORTIUM CONTRACT

Given the need to follow strict procedures and meet a set deadline on a site where activity is already taking place (potentially impacting the data set and influencing the licensing documents), Tractebel Engineering is involved in the Bohunice project within a high-level European consortium.

Led by Westinghouse Electric (Germany) this includes Tractebel Engineering with Westinghouse (Spain) and Sogin (Italy). Additionally, local Slovakian subcontractor, Nuclear Services Slovakia, provides onsite presence, as well as the mandatory translation of all documentation into Slovakian.

Each partner brings different strengths to the project; Tractebel Engineering’s being its extensive nuclear and infrastructure engineering capabilities. Also useful in Bohunice is our involvement in preliminary dismantling planning for the Belgian (Electrabel) NPPs and valuable Eastern Europe NPP decommissioning planning experience in Lithuania (Ignalina) and Bulgaria (Kozloduy).


Bohunice project team (from l. to r.) Alexandru Biro, Johan Mellemans, Emilia Masia, Johan Braet (Project Manager), Vincent Schryvers © Tractebel Engineering

EXPERTISE TAKES A “CENTRALE” ROLE

Many integrated nuclear and infrastructure competences are valuable in such a planning project, but given its knowledge of available technologies and proven methodologies Tractebel Engineering is specifically responsible for 5 of the major tasks essential to achieving the necessary licensing to fully decommission a NPP.

Decontamination plan: identification of the most appropriate and cost effective decontamination techniques to limit the personnel/environment impact of the dismantling process, as well as limit radioactive waste (RAW) production.

Dismantling plan: clarification of the structures and equipment to be dismantled in the auxiliary buildings, the safest dismantling sequence, and the methods that will be used to quantify and limit RAW and other hazardous waste production and safely manage waste removal.

Demolition plan: physical demolition of the units; site details, stability reports, structural layouts, any shoring or precautionary measures needed to support adjacent structures, as well as defining the schedule, dismantling and debris handling methods.

Decommissioning Safety Assessment Report: an evolving document, this provides important facility history (including Phase 1 activities), giving current and predicted radiological risk/protection status, accident analysis, RAW management and environment monitoring descriptors and more, in relation to legal requirements.

Periodical Safety Review (PSR) of Phase 1: ahead of the Phase 1 to Phase 2 transition, systematic assessment of the state of nuclear safety of the installation against current legislation and international practices is needed. After regulator confirmation of the proposed safety review methodology, the client will be assisted in performing the assessments.

Tractebel Engineering’s participation and integration at the heart of the nuclear industry constantly adds to our nuclear intelligence.  Partnering our clients to help them meet their objectives, this is knowledge that we believe in sharing to everyone’s benefit. Christian Pierlot – Executive Vice President Tractebel Engineering Nuclear

For more information on the many ways we can assist in nuclear decommissioning, contact us via www.tractebel-engineering-gdfsuez.com

Future Advantage

Tractebel Engineering is also active on the physical dismantling of a MOx plant – Belgonucléaire and the decommissioning of old high-level waste storage tanksONDRAF/NIRAS in Belgium. Advance preparation for Electrabel’s Doel 1 & 2 NPP decommissioning adds further valuable experience in a highly specialised market.

A new focus

Right, Peter Krupa, Project Manager Javys - left, Johan Braet, Project Manager Tractebel Engineering © Javys

With aging nuclear parks and, in some countries, increased social and political pressure, Decommissioning & Dismantling is a new focus area in nuclear. Real project experience brings advantages when helping clients face the challenges to come
Johan Braet, Business Manager Tractebel Engineering

More information

Johan Braet – Johan Braet, Business Manager, Nuclear Decommissioning & Waste

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