Dismantling of contaminated stacks at nuclear facilities by International Atomic Energy Agency

By International Atomic Energy Agency

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By International Atomic Energy Agency

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INTERNATIONAL ATOMIC ENERGY AGENCY, Decommissioning of Medical, Industrial and Research Facilities, IAEA Safety Standards Series No. 2, IAEA, Vienna (1999). INTERNATIONAL ATOMIC ENERGY AGENCY, Safe Enclosure of Shut Down Nuclear Installations, Technical Reports Series No. 375, IAEA, Vienna (1995). INTERNATIONAL ATOMIC ENERGY AGENCY, Safe Enclosure of Nuclear Facilities During Deferred Dismantling, Safety Reports Series No. 26, IAEA, Vienna (2002). EUROPEAN COMMISSION, Intégrité à long terme des bâtiments et des systèms (Long Term Integrity of Buildings and Systems), EUR 9928, EC, Brussels (1985) (in French).

This led to a re-evaluation and eventually to selection of the explosive dismantling technique. United States Department of Energy personnel and contractors assisted in solving associated issues such 42 as ground vibration, air blast and flying debris. Further details of this project are given in Refs [50–53]. The criteria and factors in the decision making process for a dismantling strategy for the Windscale Pile stacks are described in Refs [54, 55]. In particular, Unit 1 was heavily contaminated as the result of a serious accident in 1957.

In general the adaptation of 18 (a) (b) FIG. 8. JPDR decommissioning project. (a) Floor decontamination using a scabbler; (b) wall surface decontamination using a scabbler. 19 FIG. 9. Stack at Garigliano NPP, Italy. existing, proven, commercially available technology to meet decontamination needs is efficient and economical. Emerging technologies that require additional development before they could be considered as stack decontamination processes are listed below but are not given further treatment in this report.

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