communication- a vital ingredient of the safety infrastructure€¦ · communication- a vital...
TRANSCRIPT
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Communication- a vital ingredient of the Safety Infrastructure
International Symposium on Earthquake, Tsunami and Nuclear Risks after the
accident of TEPCO's Fukushima Daiichi Nuclear Power Stations
Kyoto University, Kyoto, Japan
International Seismic Safety Center
10/24/2014 1 samaddar
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What this talk is about
1. Advent of Nuclear Power
2. The Accidents
3. Elevates Public distress- Lack of Communication
4. Safety or Risk Communication
5. A Proposal
6. Items to dwell on
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The Fear
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Devastation samaddar
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Hiroshima
Aftermath
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Lives lost and
memories that can no longer
be shared with future generations
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Thus born out of war and conflict
nuclear energy was always fraught by
a public perception of fear
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• Atoms for Peace- birth of IAEA
• Period of growth
• Accidents • Three Mile Island
• Chernobyl
• Fukushima
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Advent of Nuclear Power
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10/24/2014 9 samaddar
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Power Generation
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Three Mile Island Accident
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• March 28, 1979 an equipment failure causes a partial meltdown of the TMI-2 reactor.
• Pregnant women and pre-school-age children within a five-mile radius of the plant to leave the area.
• 2 million people around TMI-2 during the accident are estimated to have received an average radiation dose of only about 1 millirem above the usual background dose
10/24/2014 12 samaddar
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Chernobyl Accident
10/24/2014 13 samaddar
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On 26 April 1986, the most serious accident in the
history of the nuclear industry occurred at Unit 4 of
the Chernobyl nuclear power plant in the former
Ukrainian Republic of the Soviet Union.
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Chernobyl
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Specific violations of procedures were identified in 1986 as major cause of the accident.
The Chernobyl accident resulted in many people being traumatized by the rapid relocation, the breakdown in social contacts, fear and anxiety about what health effects might result
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TEPCO’s Fukushima Daichii Accident
10/24/2014 17 samaddar
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10/24/2014 18 samaddar
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The Great East Japan Earthquake and Tsunami on 11 March, 2011 devastates huge tracts of the eastern coast of Japan
The enormous tsunami causes the catastrophic failure of three reactor units for the ensuing inundation
All power and cooling resources lost
Radioactive releases required the evacuation of people from the surrounding areas
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Some key lessons:
• Improve open communications and relationships with key stakeholders
• Improve on‐site resilience from the effects of major events
• Back‐up equipment that can readily be connected to the plant
• The impact of abnormal natural events on local and national infrastructure; and
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10/24/2014 21 samaddar
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People’s perceptions
even if false can affect the way they feel and act.
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The past experiences have increased public fears
about nuclear power generation and our efforts have
not provided adequate assurance
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Time
Safe
ty &
Per
form
an
ce
Communication to reduce the Gap
Fukushima
Chernobyl
TMI
Gap
Pu
blic
Co
nce
rns
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For reliable performance of any organization it is critical
that the ideas and actions formulated at
senior levels of management are communicated
effectively within the organization so that a
reliable process is developed for the implementation of
the proposed actions.
Communication samaddar
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Where these Failures to protect or missed opportunities to improve ?
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Need to reinforce that a level of safety in any
activity is achieved by risk minimization
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To attain this reliability we manage risk with a
disciplined process of informed decision making
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Risk management goal :
provide risk-informed and performance based defense-in-depth
measures by ensuring appropriate resources are in place to prevent, contain
and mitigate exposure to radiation in relation to the hazard, scenario and their
associated uncertainties
the risk resulting from the failure of some or all of the barriers and
controls, including human error is maintained acceptably low
10/24/2014 29 samaddar
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Risk minimization messages should become a part of
the nuclear industries communication with stakeholders
10/24/2014 30 samaddar
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The lessons learnt and preventive measures taken
should communicate risk minimization
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Assurance of such safety or the ability to further
reduce the risk of adverse impact on human
health and the environment can only be achieved
by communicating about safety from the early
stages
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Essential Communication on Safety in Nuclear Project
Nuclear Safety Framework
SAM ER
Enforcement through the Regulatory Review Process
SITE EVALUATION
Site Survey Selection Site Assessment Construction Operational
Essential Communication on Safety of NI
NUCLEAR SAFETY FRAMEWORK
Siting & Evaluation
Hazards Assessment
NI Designs D-I-D
NSSS & Supporting
Systems
ISSC/SAS
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In NPP’s risk minimization is achieved by using:
Site with lower risks
Engineered protective measures
Using conservative design codes and material properties
Providing diversity in operating systems
Providing redundancy in components and systems
Providing multiple layers of protection
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Some items to dwell on……….
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Since safety in any activity is achieved by risk minimization
A residual risk will always be associated with an activity
and
the nuclear industry though its continual improvement
process strives to minimize this residual risk
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This residual risk is the result of uncertainty
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The probabilistic approach provides for a
systematic scheme to account for uncertainty
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Site selection provides for this first level of
protection against external hazards
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Proper site evaluation minimizes risk by
selecting the appropriate levels of external
hazards for installation design
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Design codes and material minimize risk by
conservative design approaches and use of well
establish material properties
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System design minimizes risk by systematically
evaluating the plant system functions for
different potential and postulated scenarios
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Probabilistic risk assessment of the installation
ensures that the installation can mitigate the risk
poised by all the different conditions to which it
can be exposed.
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The margin assessment provides a certain level
of confidence that the installation will be able to
mitigate challenges beyond its design limits
bounded by the uncertainty limits.
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The tools to communicate are well established.
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In concluding: Accidents will happen but we
need to learn from them and communicate our
corrective actions to minimize future risk to the
stakeholders continually
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These messages need to be communicated to
the public to dispel their fear about things
nuclear
10/24/2014 47 samaddar
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Thank You
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