The 12th International Conference on Environmental ... - Events

Abstracts Session 58
2) A SUCCESSFUL TRANSITION FROM OPERATING TO DISMANTLING A UO2- PUO2 FUEL FABRICATION FACILITY – 16058
Thierry FLAMENT, Jean-Louis Lemarchand, Marc Dalmier,
Dominique Pecquais, AREVA NC (France)
After fabricating plutonium fuels for 40 years (Fast bredder reactor, Mox), commercial operations at the AREVA NC
Cadarache plant ended in 2003 and post operation clean out of its production building and laboratory started. AREVA’s objective
is to achieve IAEA level 2 clean-up of the process facilities and to transfer them to their owner, the French Atomic Energy Commission.
<strong>The</strong> completion of this operation will demonstrate the possibility to dismantle plutonium fuel fabrication facility and the
possibility to reuse the facilities.
<strong>The</strong> facilities to be dismantled by AREVA NC in Cadarache include: -422 glove boxes containing various types of equipment
(process equipment for nuclear fuel fabrication, analytical equipment to characterize fabricated fuel, process equipment to recover
valuable materials (Uranium and plutonium) and calcine liquid effluent) -38 storage tanks
<strong>The</strong> transition from commercial operation to dismantling activities was organized around the following three main steps:
3) TAILORING ENGINEERING ACTIVITIES TO D&D PROJECTS – 16056
Charles Negin, Project Enhancement Corp.(USA);
Andrew Szilagyi, Yvette Collazo, U.S. Department of Energy (USA); Charles Urland, Project Enhancement Corp. (USA);
John Gladden, Joe Santos, Savannah River National Laboratory (USA)
Engineering is an important element of Deactivation and Decommissioning (D&D) project technical planning, scheduling, estimating,
and execution. Understanding the scope of engineering and related design, deciding when in a project’s schedule these
activities should be conducted, and specifying the products to be generated from each engineering task are important management
functions. <strong>The</strong>se subjects are addressed in a guidance report developed by the U.S. Department of Energy (DOE) described in this
paper.
4) DATA TRACKING SYSTEM FOR STANDARDISED DECOMMISSIONING COSTING – 16191
Vladimir Daniska, Ivan Rehak, Peter Bezak, Frantisek Ondra, Marek Vasko, Decom, a.s. (Slovakia);
Vladimir Necas, Slovak University of Technology (Slovakia)
Implementation of the standardised cost structure (as presented in document “A Proposed Standardised List of Items for Costing
Purposes”, issued in 1999) into decommissioning projects is one of the main requirements of leading international organisations
involved in decommissioning - IAEA, OECD/NEA and European Commission. <strong>The</strong> computer code OMEGA implements this
structure as the calculation core, and the calculated cost and other decommissioning parameters (manpower, exposure, personnel,
waste items, etc.) are formatted in this structure. One of the most important outputs of the code generated by the code itself is the
Gantt chart (in Microsoft Project of Primavera software) of the decommissioning project which is the base for planning of decommissioning
activities. <strong>The</strong> standardised calculation structure of the code is universal structure applicable for any decommissioning
project while the Gantt chart is the structure specific for individual projects. <strong>The</strong> bi-directional interface between the standardised
calculation structure and the project specific Gantt chart, enables linking data between these two structures by one-to-one linking
or by grouping the selected items of the standardised structure into items of the Gantt chart. In order to improve the quality of calculated
data, a feedback system was proposed for collecting the selected data from real decommissioning and for processing the
collected data in order to improve quality of input data used for calculation, like manpower unit factors, material and media consumption,
exposure and others. <strong>The</strong> data tracking feedback system reflects the structure of the project tasks of the Gantt chart at the
lowest level, e.g. dismantling of equipment within the room. <strong>The</strong> structure of the data collected by personnel during performing the
decommissioning activities corresponds to calculation items of the standardised calculation structure which are involved in the
tasks of the Gantt chart. <strong>The</strong> paper presents the principles of the data tracking system in relation to both structures involved - the
standardised calculation structure and the Gantt chart of the decommissioning project, methods of the processing of collected data
and examples of application of the system.
5) PET CYCLOTRON DESIGN FOR DECOMMISSIONING AND WASTE INVENTORY REDUCTION – 16098
Robert Major, AMEC (UK)
In this paper we will examine the decommissioning and radioactive waste implications of a hypothetical cyclotron facility.
from conception through design into operation and finally decommissioning. Supported by the computer codes MCNPX, MCNP
and FISPACT we illustrate the induced activity in the cyclotron pit walls. Using the computer codes it is possible to highlight the
problems associated with neutron activation of the cyclotron pit walls and the need for specialist shielding materials, such as
boronated polyethylene.
Using MCNP it is possible to design a vault for cost effective decommissioning through the use of sacrificial layers. This code
allows the likely degree of activation and penetration of activation products to be quantified and hence gives an idea of waste disposal
costs.
In summary, a dedicated PET facility will challenge most RPAs. A wide range of skills are needed which encompass practical
operational procedures, through specialist shielding design using Monte Carlo codes to the ability to appear confident to Regulators
who may be finding the experience the same steep learning curve
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