On 26 April 1986 an explosion and fire occurred in Reactor 4 at the Chernobyl Nuclear Power Plant (Chernobyl NPP). The reactor core, primary containment and enclosing structure were all severely damaged. The Chernobyl NPP site and surrounding areas were all contaminated by a mixture of radioactive materials.
Initial measures to control the situation and prevent further releases of radioactive materials were completed in November 1986. The Soviet authorities constructed a confinement building, known as the Ukritiye. It was constructed in a very short time under emergency conditions to confine the damaged unit, and was not expected to function in the long term.
The Ukrainian authorities initiated in 1992 an international competition for proposals for the safe enclosure of the damaged unit. Later, in 1994, the European Commission launched a call for tender and awarded a contract to the European consortium “Alliance” for a feasibility study for the safe enclosure of Unit 4 (see Contract 22721). The objective of the feasibility study was to determine the optimum concept for protecting the environment from uncontrolled releases of radiation and nuclear materials arising from the damaged remains of Reactor 4 inside the current shelter. The optimum concept had to include:
Stabilisation of the existing shelter: The existing shelter was to be strengthened and modified as necessary to allow the construction of a new shelter to proceed with minimum danger both from structural collapse and from radiation.
Construction of a second shelter (Shelter 2): A new, structurally independent shelter was to be constructed to contain both the current shelter and the damaged remains of Reactor 4.
The present contract was for the provision of assistance to the EC for the management and follow-up of the contract for the feasibility study.
The activities/responsibilities of the Contractor in following-up the feasibility study contract were as follows:
- Ensure compliance of the Consultant with the requirements of the ToR.
- Maintain regular communications with MinChemobyl and other representatives of the beneficiary State.
- Receive and answer queries from the Consultant.
- Review Consultant's proposals for controlling and reporting upon progress, quality and cost, prepare comments and submit to EC. Monitor subsequent compliance with the proposals.
- Review the Consultant's proposed Project Execution Plan, prepare comments and submit to EC. Monitor subsequent compliance with the proposals.
- Monitor arrangements for, and attend, Value Engineering and Risk Management workshops.
- Monitor preparation of, and review the content of, the draft reports. Submit comments to EC prior to the formal presentation of the reports in Kiev.
- Organise and attend workshops in Kiev where the Consultant will present results at the end of each Phase of the contract. Prepare post presentation reports. Agree post-presentation actions and monitor progress on those actions.