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11
Approaches of Knowledge Management System
for the Decommissioning of Nuclear Facilities
Masashi TEZUKA2
Satoshi YANAGIHARA1
Yukihiro IGUCHI1,2
Yuya KODA2
Yasuaki KATO1,2
1. Research Institute of Nuclear Engineering University of Fukui
2. Fugen Decommissioning Engineering Center, Japan Atomic Energy Agency
IAEA Third International Conference on Nuclear Knowledge
Management: Challenges and Approaches, Vienna, Austria,
7 – 11 November 2016
22
Tokai, JAPC (GCR)- Graphite-moderated CO2-cooled
- 166 MWe (Jul.1966 – Mar.1998)
- Decommissioning: Dec.2001 –
2025JFY
JPDR, former JAERI(experimental BWR)
- 12.5 MWe (Oct.1963-Mar.1976)
- Decommissioning :
May 1986 – Mar.1996
http://www.japc.co.jp/project/haishi/index.html
Hamaoka 1,2, Chubu (BWRs)1: 540 MWe (Mar.1976 - Jan.2009)
2: 840 MWe (Nov.1978 - Jan.2009)
- Decommissioning: Nov. 2009 - 2036JFY
Current Status of Decommissioning NPPs in Japan
http://www.jaea.go.jp/04/ntokai/decommissioning/01/decommissioning_01_01.html
Mihama 1,2, KEPCO
(PWRs)1 : 340 MWe (Nov.1970 -
Apr.2015)
2 : 500 MWe(Jul.1972 - Apr.2015)
Tsuruga 1, JAPC
(BWR)- 357 MWe (Mar.1970 -
Apr.2015)
Shimane 1,
Chugoku (BWR)- 460 MWe
(Mar.1974-Apr.2015)
Genkai 1,
Kyushu (PWR)- 559 MWe
(Jul. 1975 - Apr.2015)
6 units shut down for decommissioning
Fugen, JAEA (ATR)- Heavy water moderated, light water
cooled
- 165 MWe (Mar.1979 - Mar.2003)
- Decommissioning: Feb.2008 - 2033JFY
4 units are under decommissioning
http://www.kepco.co.jp/corporate/info/community/mihama/about.html
http://www.energia.co.jp/shimane-h/
http://www.kyuden.co.jp/nuclear_index.html
http://www.japc.co.jp/plant/index.html
Fukushima-Daiichi 1-6,
(Specified nuclear facilities)
TEPCO (BWRs)1: 460MWe (Mar.1971 - Mar.2011)
2: 784MWe (Jul.1974 - Mar.2011)
3: 784MWe (Mar.1976 - Mar.2011)
4: 784MWe (Oct.1978 - Mar.2011)
5: 784MWe (Apr.1978 - Jan.2014)
6: 1100MWe (Oct.1979 - Jan.2014)
Operational
Ikata 1,
Shikoku (PWR)- 566 MWe
(Sep.1977- May 2016)http://www.yonden.co.jp/energy/atom/ikata/page_02.html
http://www.chuden.co.jp/energy/hamaoka/hama_about/location/ http://www.jaea.go.jp/04/fugen/index.html
33
Background
• The decommissioning of a nuclear facility is a long term
project.
• The decommissioning project is likely to be delayed.
• The transfer of knowledge and education to the next
generation is a crucial issue.
• In Japan, based on the past experience, the increasing
decommissioning projects are going on.
• Organized methods or a system for knowledge
management is necessary in order to solve it.
• Knowledge Management (KM) (for decommissioning)
should be well planned through all the life stages of
nuclear facilities.
4
• Required knowledge is different from that of construction
or operation phase
• The knowledge of the design is used in different manner
in the dismantling stage.
• Decommissioning is one-time project. it may not be cost
effective to collect and organize the knowledge.
• If the knowledge is valuable or general, it can be
reusable inside the project or a similar project.
• It is possible to transfer knowledge by moving staff, but it
is not always rational.
• For the normal decommissioning project, it is possible to
implement with combination of existing technologies. In
this case, the important knowledge is “Which technology
is suitable?” for low risk, low cost and short time project.
Characteristics of knowledge for decommissioning
5
Systemized
Knowledge of Decommissioning
Data of Design, Construction,
O&M of a Specific Plant
Systemized Explicit Knowledge for Decommissioning of a Specific plant
Knowledge Still Tacit
Systemized
InformationSystemized
Information for
Decommissioning
Transfer by Practicing
R&D Results of Domestic &
International
Decom. Facilities
Sharing and Utilization of Knowledge
(Practicing, Education, Transfer)
Personal Knowledge(Explicit or Tacit)
Engineers with Experience of
Design, Construction, O&M
① Establishment of
Knowledge Acquisition
③ Construction of KM Support System
② Formulation of
Knowledge Acquisition
Outline of the Knowledge Management Approaches
6
STEP1: Establishment of knowledge acquisition method
necessary for decommissioning
Extraction and Arrangement of data and information from
international or domestic decommissioning results of research
Organization and Systematization of information by establishing rules
and methods to extract necessary information from plant specific data
Establishment of method of knowledge extraction based on the
decommissioning taxonomy
STEP2: Formulation of knowledge acquisition from experienced
engineers
Externalization of implicit knowledge of employees along with their
occupational history
Establishment of method for extraction of knowledge and know-how
from communication with experienced employees such as
questionnaires interviews or event simulations for socialization and
externalization
Examples of Activities for the KMS
7
STEP 3: Construction of KM support system for
decommissioning
Enhancement of information access system by knowledge
engineering technologies
Application of advanced information technology such as 3D-
CAD, VR or AR
Enhancement of knowledge internalization of present employees
by discussion meetings
Establishment of knowledge transfer by special lectures or
training by retiring employees
Knowledge transfer support from retirees by continuous
communication even after retirement
Information exchange framework with other decommissioning
facilities
Making documents of standardization of decommissioning
knowledge
Examples of Activities for the KMS
8
Knowledge Management Support System(Information Exchange and QMS based IT systems)
Enhancement of
communication between
employees
• Personal profile and
expertise data
• Enhancement of daily
communication
• Knowledge search such as
Q&A system
Extraction of useful
knowledge
• Knowledge acquisition
during the daily work
• Knowledge acquisition
process based on the
Quality Management System
Existing
QMS
Knowledge acquisition
process (SECI Model)
Information exchange by
person to person levelEnhancement of information
sharing and knowledge
acquisition
SocializationSharing & creating
tacit knowledge
through direct
experience
ExternalizationArticulating tacit
knowledge
through dialogue
and reflection
InternalizationLearning &
acquiring new tacit
knowledge in
practice
CombinationSystemizing &
applying explicit
knowledge &
information
Tacit Tacit
Exp
licit E
xplic
it
Explicit Explicit
Tacit T
acit
9
Knowledge Management Support System(Knowledge Transfer and Education etc.)
Transfer of knowledge from
retirees to existing employees
• Questionnaire or interview to
elderly employees
• Education in the office or field
• Study meeting or face to face
education
Support system by advanced
technology Virtual Reality or
Augmented Reality based on 3D-CAD
• Embedding of necessary data,
information and knowledge in the
virtual model
• Provision of significant knowledge of
decommissioning planning and
implementation when necessary
Material: SUS316,High contamination,
Dismantling experience in XXX
NPS
10
Conclusions
• Enhancement of Communication
- You can know whom you should ask something to know
by sharing personal field each other.
• Extraction of Useful Knowledge
- Activities based on running Quality Management System
are useful
• Transfer of Knowledge to Next Generation
- We have to effectively get explicit and tacit knowledge of
retiring employee
• Support system by VR or AR based on 3D-CAD
- Advanced IT tools are useful, but you should be careful
not to spend too much cost.
1111
Thank you for your attention!
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