Transcript No Slide Title

Optimisation in Operational
Radiological Protection
Contribution from the ISOE Working Group on
Operational Radiological Protection (WGOR)
Carl Lindvall
ISOE Chair
Presentation at the
Fourth ISOE European Workshop on Occupational Exposure at NPP:s
Lyon 24 – 26 March 2004
Carl G Lindvall
International Commission on
Radiological Protection (ICPR)
 ICRP is currently developing an evolved system of radiological
protection - general recommendations
 This includes A Framework for Assessing the Impact of Ionising
Radiation on Non-human Species (ICRP Publication 91)
 ICRP opened the process of developing an evolved system to a
broad stakeholder community - actively involving the Nuclear
Energy Agency (NEA)
Carl G Lindvall
Building a common
understanding
ICRP is developing an
evolved system of
radiological protection
CRPPH and ISOE provides
active partnership with a broad
stakeholder community
General
recommendations
Protection of NonHuman Species
Explore implications
Discuss new concepts
Road test
Carl G Lindvall
ISOE Working Group on Operational
Radiological Protection (WGOR)
 The ISOE Programme has great interest in assuring that the
new ICRP recommendations will be operationally useful.
 To contribute to this process, the ISOE Steering Group agreed
to develop a report describing current good practice in
optimisation, and identifying areas where new guidance from
ICRP would be helpful.
Carl G Lindvall
ISOE Working Group on Operational
Radiological Protection (WGOR)
The Group’s task
 identify the areas of operational radiological protection that
should be reflected in ICRP recommendations.
 illustrate how operational optimisation can be applied in practice
in various situations
 develop practical and operational views
 provide views, on behalf of the ISOE Steering Group, to the
CRPPH
Carl G Lindvall
ISOE Working Group on Operational
Radiological Protection (WGOR)
 ISOE initiative to remind the international radiological protection
community of the practical aspects of radiological protection
 WGOR met 4 times in 2002 – 2003
 Draft report on Optimisation in Operational Radiological
Protection (the professionals’ views)
 Will be presented at the IRPA-11 Congress, May 2004 in
Madrid, Spain
Carl G Lindvall
International Commission on Radiological
Protection (ICPR)
 ICRP:s proposal will be presented at the IRPA 11 meeting in
Madrid, May 2004
 The draft proposal will be published on the ICRP web after the
IRPA meeting.
 ICRP will still be open for discussion and comments to the end
of 2004
 The final edition are expected in 2005 and to be published lat
2005 or early 2006.
Carl G Lindvall
ISOE Working Group on Operational Radiological Protection (WGOR)
General statements
 The documents from the ICRP are “framework” documents, and
have changed and developed during our work.
 They provide discussions of guiding principles and overall
concepts that the ICRP is proposing to use as the bases for its
recommendations.
 The details that would be necessary to fully understand the
implications and ramifications of the new recommendations are
not always presented.
Carl G Lindvall
ISOE Working Group on Operational Radiological Protection (WGOR)
General statements
 Cost implications that result from the proposed changes to
ICRP’s recommendations are significant
 There are no cost considerations in the ICRP documents
reviewed
 The ICRP needs to be quite clear with respect to the benefits
from change, in order to optimise the efforts and costs involved
with this change.
Carl G Lindvall
ISOE Working Group on Operational Radiological Protection (WGOR)
Key issues discussed
 Optimisation of Public exposure
 Optimisation of Worker exposure
 Empowerment of the Workforce
 The use of tools in optimisation
 Old-plant ALARA versus New-plant ALARA
 Optimisation of decommissioning
 International aspects of optimisation
Carl G Lindvall
ISOE Working Group on Operational Radiological Protection (WGOR)
Optimisation of public exposure
Key messages
The objective is the process of optimisation rather than
minimisation
ALARA philosophy and “best available technology (BAT)” are
both tools for optimisation
Options which transfer dose from the public to the worker
are not considered to be ALARA
Collective dose is an effective planning tool for comparing
options - however should not be used to assess public
detriment
Carl G Lindvall
ISOE Working Group on Operational Radiological Protection (WGOR)
Optimisation of worker exposure
Key messages
Optimisation is the key tool for the management of worker
doses
Worker collective dose is an extremely useful tool for worker
exposure management
Flexibility in individual dose management is very useful
Carl G Lindvall
ISOE Working Group on Operational Radiological Protection (WGOR)
Empowerment of the Workforce
Key messages
 Work management empowers workers. Good work
management leads to
 Lower doses
 Higher safety
 Higher efficiency
 Lower costs
 More efficient use of resources
 National and plant specific approaches may differ significantly
while achieving similar objectives of work management
 Includes many aspects of worker health and safety
Carl G Lindvall
ISOE Working Group on Operational Radiological Protection (WGOR)
The use of tools in optimisation
Key messages
Application of a generic level of the order of a few 10s of
µSv/a, below which regulatory control could be reduced
would be welcomed
Flexible guidance for the application of optimisation is
needed
Carl G Lindvall
ISOE Working Group on Operational Radiological Protection (WGOR)
Old-plant ALARA versus
new-plant ALARA
Key messages
Optimisation of dose, below a given dose constraint, focuses
on the process, not on the results. Site-specific philosophies
may be equivalent, while yielding different results
Guidance on criteria to judge effectiveness of ALARA
programmes needed
Carl G Lindvall
ISOE Working Group on Operational Radiological Protection (WGOR)
Optimisation of decommissioning
Key messages
Any levels eventually chosen for clearance levels, and their
regulatory control should not result in excessive worker
exposures
Worker exposures should be key elements considered when
national decommissioning policy is developed
Carl G Lindvall
ISOE Working Group on Operational Radiological Protection (WGOR)
International aspects of optimisation
Key messages
 Level of common approaches and understanding to effectively
optimise public and worker doses needs to be discussed
 Management and optimisation of worker doses is the
responsibility of the employer, however, the facility is
responsible for optimising doses at the facility. National
regulatory authority responsible for monitoring worker doses and
compliance with limits
 Expanding the use of practical tools, such as dose passports
should be explored nationally and internationally
Carl G Lindvall
ISOE Working Group on Operational Radiological Protection (WGOR)
Conclutions
 Flexibility is a key to the operational application of radiological
protection principles
 It is hoped that the new ICRP recommendations will take into
account current good practice, and provide guidance for
optimisation in practice
 The ISOE Programme will continue to follow ICRP
developments, and contribute its views on operational topics
Carl G Lindvall