Strategies for Radiological Characterisation in Decommissioning … · 2016. 2. 22. · Daniela...
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© 2016 Organisation for Economic Co-operation and Development
Strategies for Radiological Characterisation in Decommissioning of Nuclear Facilities
Key findings of the TGRCD - a task group of the Working Party on Decommissioning and Dismantling
(WPDD)
Arne Larsson, Inge Weber
PREDEC 2016 - Lyon
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Background
• Characterisation is
one of the most important activities in
decommissioning
• NEA WPDD initiated in 2010 a project on
”Strategies for Radiological Characterisation
in Decommissioning of Nuclear Facilities”
• The project (Phase I) completed in 2013
• In 2014 a new mandate (Phase II) was
given on
…waste and materials end-state
perspective”
2
Photo: F Ekenborg, AB SVAFO
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Presentation of task group
Task group composed of: • Independent experts
• Decommissioning organisations
• Regulators
• Repository organisations
• Specialist consultants
• Utilities
• Waste Management organisations
Representatives from 11 countries
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• Phase I task group:
Boby Abu-Eid (USA), Caroline Andrieu (France), Thierry Boisserie (France),
Yvon Desnoyers (France), Alister A. Dunlop (UK), Henrik Efraimsson
(Sweden), Lars Håkansson (Sweden), Sean Jarman (UK), Nieves Martin
(Spain), Catherine Ollivier Dehaye (France), Peter Orr (UK), Ivan Rehak,
Frédéric Tardy (France), Stefan Thierfeldt (Germany, editor of the report),
Arne Larsson (Sweden, chairman of task group)
• Phase II task group:
Boby Abu-Eid (USA), Massimo Altavilla (Italy), Caroline Andrieu (France),
Yvon Desnoyers (France), Alister Dunlop (UK), Matthew Emptage (UK),
Manuel Pantelias Garcés (Switzerland), Michael Knaack (Germany),
Daniela Manes (Italy), Nieves Martin Palomo (Spain), Chantal Mommaert
(Belgium), Marie-Delphine Salsac (France), Denis Pombet (France), Andrew
Szilagyi (USA), Hiroaki Takahashi (Japan), Naeem Ul Syed (Norway), Inge
Weber (OECD/NEA); Arne Larsson (Sweden, chairman)
ACKNOWLEDGEMENTS
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A lot of questions
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Phase I
(2011-2013)
Overall strategies
General characterisation issues
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Characterisation – in a life cycle perspective
OperationDismantling, remediation
Final
shutdown
Preliminary
decommissioning plans
Decommissioning
plan
Dismantling
project startsSite release
Planning of
specific projects
Final survey of
end state
Cost estimations Validation of
nuclide vectors
Planning of final
survey
Safety analysis
Environmental
impact assessment
Reduction of
radiological hazards
Radiological characterisation
Background
radiological
conditions
Construction,licensing
Transition period
Material
compositions
Regulator´s
confirmatory
survey
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The characterisation process
• Generic steps exist
– relevant for all characterisation projects
– independent of size
– independent of the nuclear facility
lifecycle phase
• Applicable for both materials and
objects to be characterised
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Planning
Initiation
Data
assessment
Implementation
Judgement/
Reporting
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The final report (NEA WPDD Status Report)
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Focus: Strategic approaches and issues – no detailed descriptions
Target group: Decision makers, executives and others looking for an
overview
Aim • Identify and present the best practice at different stages of
decommissioning
• Point out areas that could or should be developed further
via international cooperation and coordination.
Table of contents
• Role and significance of radiological characterisation in
decommissioning
• Key activities
• Management aspects and selection of strategies
• Experiences/lessons learned
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Phase I – summary and conclusions
• Well defined objectives and a structured approach is essential
• Radiological characterisation is a key activity in all phases of
decommissioning
• Characterisation activities to support the future
decommissioning should start very early
• Gathering and appropriate evaluation of historical data and
knowledge is crucial. Do not wait initiating this process.
• Do not get lost in technical details when forming strategies and
plans
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Read the report – gives a good overview of identified Best Practice
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Phase II
(2014-2016)
Strategies for optimization of
radiological characterization in a waste
and materials end-state perspective
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Identify strategic approaches, good practice, issues and risks related to
disposal of radioactive waste and clearance of materials, like
• what information should be collected (type, quality, quantity),
considerations variations etc.
• why the information is needed
• how the information could be gathered and managed
• when the information could/should be gathered
Phase II - Objective
Focus areas: • Strategic approaches
• Issues and risks (threats and opportunities)
• Observations of good practice
Target groups: Technical managers of decommissioning projects,
Waste management agencies, Regulators
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• Questionnaire to gather views on Good Practice
• Collect and analyze regulations, standards and guiding
documents
• Identify current strategies and practices for – defining objectives
– planning and implementation
– managing and analyzing information
– reporting
– knowledge management (up to disposal of the waste)
• Case studies
• Define Good Practice and areas for further development
• Arrange an international workshop
• Development of NEA WPDD status report
Main activities – Phase II
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Two versions
• Facility owners
• Regulators
In overall focus on Good Practice
Questionnaire
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Set-up of the survey
Regulator Owners
Responder role and experience X X
National context and overview X
Initiation phase X X
Planning phase X
Implementation phase X
Data assessment phase X X
Quality assurance X X
Reference project (Case Study)
X
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Response rate and responder experience • Facility owner 34 responses from 12 countries
• Regulator 19 responses from 11 countries
• Geographical spread Asia, Europe and North America
Regulator Owners
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Questionnaire – overall conclusions
• Solid experience in radiological characterisation
among regulators as well as owners
• A common view of regulators and owners/implementers on
Good Practice
• Highest priorities:
- Reducing uncertainty about waste and
- Identification of waste classification
• Major differentiators:
- National legislation on clearance
- Set-up of the disposal programs
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Objective:
• Gather information demonstrating
unique and/or good practice
for incorporation in the
NEA Status Report
Content:
• Overview characterisation activities
• Historical data
• Characterisation approach
• Characterization methodology
• Lessons learned
• What would you have done differently
if you did it again?
Case studies
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Type of facilities:
• NPPs
• Research reactors
• Research facilities
• Uranium milling
• Contaminated sites
Case studies
Countries covered:
• Belgium
• France
• Germany
• Italy
• Japan
• Norway
• South Korea
• Spain
• Sweden
• UK
• USA
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• Input from TG members on the main
activities defined
• Results of the questionnaire
• Exchange with other task groups
• Literature studies / personal
communication
• Outcomes of the international
workshop
• Findings from case studies
0. Executive Summary
1. Introduction
1.1 Background
1.2 Aims and Objectives
1.3 Scope
1.4 Importance of radiological characterisation
2. Prerequisites
2.1 The material and waste end-state and its
variations
2.2 Regulatory Framework
2.3 Optimisation Criteria
3. Material, waste and waste end-state
aspects to be considered in RCD
4. Key Influcence Factors
5 Good Practice/technical chapter
6. Strategies and Management Aspects
7. Case Studies / examples
Lessons Learned
8. Areas Suitable for Further Pursuing
References, Glossary, Bibliography
The phase 2 final report
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THANK YOU FOR YOUR ATTENTION !