Transcript User talk 2 - Safety Case Initiatives for nuclear decomissioning

Safety Case Initiatives
Licensed Sites
New-Magnox
Safety Case - Aims
Aims from the bid:
• Safety Cases aligned to Programmes and Projects
• Methodology improvements
• Cases proportionate to remaining risk
• Use of flexible permissioning
• Interactive peer review
Safety Case Initiatives
Initiative from Bid
Delivery Date
Strategy Paper
End Feb 2015
Review of existing cases
End April 2015
Implementing and embedding
modular delivery
End October 2015
Updated processes and use of ASCE
software implemented
End April 2016
Safety Cases
• Modular Safety and Environmental Case Delivery Strategy
for All Programmes
• Repeatable – Mantra
• Proportionate
• Clear
• Concise
• Complete?
• Accessible
• Aligned to programme
• Cultural Transition
PBO Programmatic Approach
OPERATIONAL
FUELED
DEFUELING
SITE FUEL FREE
ILW / LLW / NON RAD.
RETRIEVALS AND
TREATMENT
DECONTAMINATION,
DEPLANTING,
SEALING AND
DEMOLITION
CARE AND
MAINTENANCE /
INTERIM END STATE
(Steady State)
(Steady State)
(Transition Phase via
Projects)
(Steady State)
(Transition Phase via
Projects)
(Transition Phase via
Projects)
(Steady State)
e.g. WYLFA
e.g. OLDBURY
e.g. CHAPELCROSS
e.g. BRADWELL,
WINFRITH
OPERATIONAL
PBO
Programmatic
Approach

FUELED
(Steady State)
(Steady State)
e.g. WYLFA
e.g. OLDBURY
Live Site Summary
Safety and
Environmental Case
Live Site Summary
Safety and
Environmental Case

SITE FUEL
FREE

(Transition Phase
via Projects)
(Steady State)

ILW / LLW /
NON RAD.
RETRIEVALS &
TREATMENT
(Transition Phase
via Projects)

DECONTAM.,
DEPLANTING,
SEALING AND
DEMOLITION

(Transition Phase
via Projects)
Live Site Summary
Safety and
Environmental Case
Live Site Summary
Safety and
Environmental Case
Post Generation and
Defuelling Project Safety
and Environmental Case
e.g. BRADWELL,
WINFRITH
Live Site Summary
Safety and
Environmental Case
Rebaselined Post
Defuelled Safety and
Environmental Case
Dry Fuel Store Safety
Dry Fuel Store Safety
Dry Fuel Store Safety
REVIEW
REVIEW
and Environmental Case
and Environmental Case
and Environmental Case
(Wylfa Only)

(Wylfa Only)

(Wylfa Only)
CARE AND
MAINTENANCE
/ INTERIM END
STATE
(Steady State)
e.g.
CHAPELCROSS
Fuelled But Cold Reactor
Safety and
Environmental Case
Generating Safety and
Environmental Case
DEFUELING
Live Site Summary
Safety and
Environmental Case
Live Site Summary
Safety and
Environmental Case
Reactor Building and
Integrated Structures (eg
Wylfa Dry Fuel Store)
Decontamination,
Deplanting, Sealing and
C&M Preparation Project
Safety and
Environmental Case
Reactor Safestore Safety
and Environmental Case
Dry Fuel Store Safety
and Environmental Case
(Wylfa Only)
RSRL Reactors
Decontamination,
Deplanting, Sealing and
Demolition Project Safety
and Environmental Case
Ponds Facilities Safety
and Environmental Case
REVIEW

Ponds Facilities Safety
and Environmental Case
REVIEW

Ponds Facilities Safety
and Environmental Case
Ponds Facilities Safety
and Environmental Case
IONSIV Filters,
Cartridges and Zeolite
Resin Retrieval Project
Safety and
Environmental Case
Ponds Decontamination,
Deplanting and Sealing
Safety and
Environmental Case
Contaminated Concrete
Structures Safety and
Environmental Case
Solid ILW Facilities
Decontamination,
Deplanting, Sealing and
Demolition Project Safety
and Environmental Case
Contaminated Concrete
Structures Safety and
Environmental Case
Wet ILW Facilities
Decontamination,
Deplanting, Sealing and
Demolition Project Safety
and Environmental Case
Contaminated Concrete
Structures Safety and
Environmental Case
Effluent Treatment
Facilities
Decontamination,
Deplanting, Sealing and
Demolition Project Safety
and Environmental Case
Contaminated Concrete
Structures Safety and
Environmental Case
CXPP Decontamination,
Deplanting, Sealing and
Demolition Project Safety
and Environmental Case
Contaminated Concrete
Structures Safety and
Environmental Case
Ponds Sludge Retrieval
Project Safety and
Environmental Case
Ponds Liquor Removal
and Treatment Safety
and Environmental Case
Solid ILW Facilities Safety REVIEW Solid ILW Facilities Safety REVIEW Solid ILW Facilities Safety REVIEW Solid ILW Facilities Safety
and Environmental Case
and Environmental Case
and Environmental Case
and Environmental Case


New Solid ILW Treatment
Facilities Safety and
Environmental Cases

FED Retrieval Project
Safety and
Environmental Case
Tube Store Retrieval
Project Safety and
Environmental Case
MAC Retrieval Project
Safety and
Environmental Case
MCI Retrieval Project
Safety and
Environmental Case
SNM Retrieval Project
Safety and
Environmental Case
Onsite Solid ILW
Package Transport to
Solid ILW Treatment
Facilities Safety and
Environmental Case
Wet ILW Facilities Safety REVIEW Wet ILW Facilities Safety REVIEW Wet ILW Facilities Safety REVIEW Wet ILW Facilities Safety
and Environmental
and Environmental
and Environmental
and Environmental
Cases
Cases
Cases
Cases



New Wet ILW Treatment
Facilities Safety and
Environmental Cases
IX Resin Retrieval
Project
Safety and
Environmental Case
Stored Sludge and Sand
Retrieval Project
Safety and
Environmental Case
Dessicant Retrieval
Project
Safety and
Environmental Case
Onsite Wet ILW Package
Transport to Wet ILW
Treatment Facilities
Safety and
Environmental Cases
Active Effluent Treatment
Facilities Safety and
Environmental Cases
REVIEW

Active Effluent Treatment
Facilities Safety and
Environmental Cases
REVIEW

Active Effluent Treatment
Facilities Safety and
Environmental Cases
REVIEW

Active Effluent Treatment
Facilities Safety and
Environmental Cases
IX Resin Retrieval
Project Safety and
Environmental Case
Stored Sludge and Sand
Retrieval Project Safety
and Environmental Case
CXPP and B141
Facilities Safety and
Environmental Cases
(Chapelcross Only)
REVIEW
ILW Stores Safety and
Environmental Cases
REVIEW

CXPP and B141
Facilities Safety and
Environmental Cases
(Chapelcross Only)
REVIEW
ILW Stores Safety and
Environmental Cases
REVIEW


CXPP and B141
Facilities Safety and
Environmental Cases
(Chapelcross Only)
REVIEW
ILW Stores Safety and
Environmental Cases
REVIEW


CXPP and B141
Facilities Safety and
Environmental Cases
(Chapelcross Only)
CXPP POCO,
Decontamination,
Deplanting, Sealing and
Interim C&M Preparation
Project Safety and
Environmental Case
ILW Stores Safety and
Environmental Cases
New ILW Stores Safety
and Environmental
Cases

ILW Stores Safety and
Environmental Cases
Offsite ILW Package
Transport to ILW Storage
Facilities Safety and
Environmental Cases
REVIEW
LLW Facilities Safety and
Environmental Cases
REVIEW
LLW Facilities Safety and
Environmental Cases

REVIEW
LLW Facilities Safety and
Environmental Cases

LLW Facilities Safety and
Environmental Cases

New Solid LLW
Treatment Facilities
Safety and
Environmental Cases
New Solid LLW
Treatment Facilities
Decontamination,
Deplanting, Sealing and
Demolition Project Safety
and Environmental
Cases
New Wet LLW Treatment
Facilities Safety and
Environmental Cases
New Wet LLW Treatment
Facilities
Decontamination,
Deplanting, Sealing and
Demolition Project Safety
and Environmental Case
Offsite LLW Package
Transport to LLWR
Safety and
Environmental Cases
REVIEW
Site Infrastructure Safety
and Environmental
Cases

Contaminated Land
REVIEW
Safety and
Environmental Cases
(Addendum to Nearest

Facility Case)
Safety and
Environmental
Management Case
Radioactive Waste
Management Case
REVIEW

REVIEW

Site Infrastructure Safety
and Environmental
Cases
Site Infrastructure Safety
and Environmental
Cases
New Non Radiological
Hazardous Wastes
Treatment Facilities
Safety and
Environmental Cases
New Non
Radiological/Hazardous
Wastes Treatment
Facilities
Decontamination,
Deplanting, Sealing and
Demolition Project Safety
and Environmental
Cases
Site Infrastructure
including Common
Services and Non
Contaminated Concrete
Structures Safety and
Environmental Case
Contaminated Land
REVIEW
Safety and
Environmental Cases
(Addendum to Nearest

Facility Case)
Contaminated Land
Safety and
Environmental Cases
(Addendum to Nearest
Facility Case)
New Solid LLW
Treatment Facilities
Safety and
Environmental Cases
Land Remediation
Project Safety and
Environmental Cases
Land Quality Safety and
Environmental Cases
(This is the only case
applicable to Winfrith IES)
REVIEW
Site Infrastructure Safety
and Environmental
Cases

Contaminated Land
REVIEW
Safety and
Environmental Cases
(Addendum to Nearest

Facility Case)
Safety and
Environmental
Management Case
Radioactive Waste
Management Case
REVIEW

REVIEW

Safety and
Environmental
Management Case
Radioactive Waste
Management Case
REVIEW

REVIEW

Safety and
Environmental
Management Case
Radioactive Waste
Management Case
KEY
SITE MANAGEMENT PROGRAMME
GENERATION AND DEFUELLING PROGRAMMES
ASSET MANAGEMENT AND CARE AND MAINTENANCE PROGRAMMES
WASTE MANAGEMENT PROGRAMMES
DECOMMISSIONING PROGRAMMES
REVIEW

REVIEW

Safety and
Environmental
Management Case
Radioactive Waste
Management Case
Strategy Paper
Title
Programme
CFP Key Initiative 4: Modular Safety Cases:
Strategy for Improvements in Safety Case
Delivery
Glossary
References
Summary
Review Comments
To deliver safety cases more
efficiently and aligned to
programmes - change
behaviours.
Introduction
Background
D
Safety Case Initiatives Delivery
A
Safety Case Initiatives Strategy
1
Stakeholder
Engagement
3
Rationalise
Magnox / RSRL
Processes &
Procedures
2
Increased
Communication
Across 12 Sites &
Stakeholders
4
Provide Tools
B
Safety Case Initiatives Technical
5
Update and Deliver
Training
6
Develop Metrics on
SC Initiative
Delivery & SC
Production
C
Safety Case Initiatives Cultural
7
Co-operative /
Team Working
Across 12 Sites
8
Leadership &
Direction - SCIT &
Principal
Consultants
11
Overarching Safety
& Environmental
Strategy Paper for
SC Delivery Across
Fleet Aligned With
LTP.
9
Encourage Safety
Case Innovation &
Provide Support
10
Mentoring
12
Lead Projects Gain and Distribute
LFE
13
Improve
Consistency in
Programmes
Affecting Several
Sites (Modularity).
14
Post Job Debrief &
Share LFE From All
Projects
Divers
Title
Independent
Nuclear Safety
Assessment
Use of Divers in
Ponds is
Acceptable for
Specific Tasks at
Dungeness
Summary
Decommissioning
Safety Case
Handbook
Compliance
Abbreviations
Verification Plan
Introduction
Description of
Plant and
Process
Design and Safety
Case Strategy
Compliance with
UK Diving
Regulations
Environmental
Impact & Waste
Management
Conventional
Safety
Radiological
Safety
Assessment
Substantiation of
Claimed Safety
Measures
Commissioning
Quality
Arrangments,
Documentation
and Training
Intelligent
Customer
Requirements
Conclusions
Forward
Actions
Planned
Operational
Dose
References
Fault / Hazard
Identification
Fault Dose
Assessment
Appendix A Tables
Table 4 Summary of
Bounding
Radiological
Table 5 Initiating Event
Frequencies
Table 6 - Safety
Measure pfd
Justification
Fault / Hazard
Frequency
Assessment
Deterministic
Safety
Assessment
Appendix B Figures
Table 7 Probabilistic
Safety
Assessment
Probabilistic
Safety
Assessment
Appendix C - Fault
Schedule
Table 8 - Fault
Schedule
ALARP Review
Human Factors
Appendix D Summary of Safety
Requirements &
Substantiation
Table 9 - Faults
excluded from
the Fault
Schedule
Overarching Strategy for
SC Development for Use
of Divers in Ponds
Notes
Ponds
Schematics
Use of Divers in Ponds is
Acceptable for Specific
Tasks
Optioneering
confirms Use of
Divers as
Preferred Option
for Specific Tasks
Optioneering
Output
Project Strategy
Supports a
Progressive
Implementation
Demonstrations
Start with
Cleaner
Ponds & Low
Intrusive
Tasks
OEF from
Experienced
Divers
Safety Case Modules
show risks are
tolerable and ALARP
Initial
Assessments
Utilising
Bounding
Consequences
Divers
working in
the Ponds
Hazard
Identification
Decontamination,
Retrieval, and
Size Reduction of
Furniture, Skips,
Plant Equipment
Pond Walls
and Floors
Sealing and
Remediation
Radiological &
Environmental
Safety Case
Modules
Retrieval and
Sorting of
Pond Debris
Conventional
Safety
Assessment
Modules
Sludge
Retrieval
Demonstrations
Review
Similar
Cases
Examples of
Previous
Projects /
Work
Estimate DB
Class and
Define HMSs
Working
Methodologies
Normal
Protective
Measures
Encap
Generic encap case & concept
design for multiple sites is
Acceptable
PEP
Summary Generic
Encap Case
Adequate Justification
for Solids infill
Tru-shield / Boxes Line
Up
Environmental
Conventional / Chemo
/ Fire etc.
Plant Description
Adequate Justification
for Wet Solidification
Line Up
Environmental
Conventional / Chemo
/ Fire etc.
Planned Work
Dose Uptake is
Acceptable and
ALARP
Indicative Safety
Measures are
Adequate
ALARP
DSR
Issued
Planned Work
Assessment
Indicative
Procedural
Controls are
Adequate
DBA
Completed
Radiological Risks
are Tolerable and
ALARP
PSA
Completed
Plant Description
ALARP
Conventional / Chemo
/ Fire etc.
Planned Work
Dose Uptake is
Acceptable and
ALARP
Indicative Safety
Measures are
Adequate
ALARP
DSR
Issued
Planned Work
Assessment
Tabular HAZAN
Shielding
Design
Dose
Rates
OR Model
Work Activities
and Durations
IEFs
Existing Calcs
Review
Consequences
Adequate Justification
for Polymerisation Line
Up
Environmental
Indicative
Procedural
Controls are
Adequate
DBA
Completed
Radiological Risks
are Tolerable and
ALARP
PSA
Completed
Plant Description
Planned Work
Dose Uptake is
Acceptable and
ALARP
Indicative Safety
Measures are
Adequate
ALARP
DSR
Issued
Planned Work
Assessment
ALARP
Tabular HAZAN
Grouped
Faults
Shielding
Design
Dose
Rates
IEFs
Existing Calcs
Review
HAZID
Source
Terms
OR Model
Work Activities
and Durations
Consequences
DBA
Completed
Radiological Risks
are Tolerable and
ALARP
PSA
Completed
Tabular HAZAN
Grouped
Faults
Shielding
Design
Dose
Rates
OR Model
Work Activities
and Durations
IEFs
Existing Calcs
Review
HAZID
Source
Terms
Rad Design Basis
Indicative
Procedural
Controls are
Adequate
Consequences
Grouped
Faults
HAZID
Source
Terms
Rad Design Basis
Rad Design Basis
ALARP
B462
Executive
Summary
Top Level Safety
Report
Implementation
Plan
Document
Changes
Improvement
Plan
Introduction
Technical Check
Glossary
Facility Review
Conclusions
Plant Ops &
Description (inc
Scope)
Normal
Operations
Operational
Review
PRS Topic
Report 4
PRS OEFL
Report
Hazard
Identification
Hazard
Assessment
ES Support File
Safety
Management
Human Factors
Support File
Peer Review
References
Safety
Committees
Scope Review
Meetings
Plant
Description
Existing
HAZOPs
New HAZOPs
Maintenance
HAZAN
Fire HAZAN
Waste
Movements
HAZAN
Loss of Service
HAZAN
External Events
HAZAN
HEP
Justifications
Fault Schedule
Storage HAZAN
Processing
HAZAN
Criticality HAZAN
Existing CSAs
Existing CIDAS
ES Reports /
Walkdown
Sheets
Templates
Human Factors
Review
B462 PRS
Leadership &
Management
Review
ONR Acceptance
Dragon HAZOP
B462.17
HAZOPs
B462.23 HAZOP
B462.23 Crane
Transport
Interactions
LEU Repack
Drainage
B462.17
New CSAs &
CIDASs
Dragon
Transport
(B462.6)
LEU Repacking
(B462.23)
Engineering
Schedule
SQEP
Walkdowns
(Engineer)
Dragon in
B462.6
DB Design
Parameters
Operational
Assumption
Table
Inventory Paper
Methodologies
LCM
CFP Safety
Case Initiatives
PRS SAH
Review
Wounding
External
Hazards
Dispersion
Coefficients
SAH
Evacuation
Times
Justification
HARWIN Input
Data
CHILW & CLD
Master
Spreadsheets
Sellafield
Shielding
Document
HARWIN
Assessment
HARWIN
Sturctured What
If?
(K)SRE Table
(K)SMR Table
Generic
Walkdowns
ALARP Review
Report
BWA SS1
Summary
SUMMARY OF
COMMITMENTS
The Bradwell Safestore will
enter C&M safely and will be
maintained safely therafter
Engineering Schedule
CHANGES TO
DOCUMENTATION
Introduction
Key Safety Argument
Scope of the
Proposal
Conclusions and
Recommendations
Abbreviations
References
Safety Case Approach
shows risks to public
and workers are ALARP
and Broadly Acceptable
Entry State
Design is
Appropriate
Environmental
Assessment
Drawings
Design
Principles
Reactor Core
Assessment
Safestore
Configuration
Optioneering
Annexe Structural
Frame &
Stairwells
Assessment
Reactor
Voids
Assessment
Assessments
Issues
Methods
Quality
Assurance
Boiler Concrete
Support Structure
Assessment
Boiler House
Steel Structure &
Roofs
Assessment
APPENDIX A
Safestore Plant
Description
Duct Cell
Concrete
Structures &
Duct
Hangers
Circulator Halls &
Central Change
Concrete Structure
Assessment
Pile Cap
Steel
Structure &
Roofs
Assessment
Assessment of
Planned Work
APPENDIX B
Remaining
Radioactive Inventory
Weatherproof
Envelope
Arisings
Radiological Safety
Assessment
Structural integrity of
the reactor buildings
is satisfactory for
long-term duty
Fault and
Hazard
Identification
Determination
of Fault /
Hazard
Doses
Consideration of
Environmental
Permitting
Regulations 2010
Deterministic
Assessment
APPENDIX D
Safestore Monitoring
Requirements During
C&M
APPENDIX C
Safestore Fault
Schedule
Active Drains
Core Vessels,
Primary Circuits
and Bioshields
Standards and
Acceptance
Criteria
Pile Caps
Inventory
Boiler Houses &
Duct Cells
MAC Storage
Facilities
Annexes
Circulator Halls
APPENDIX G
Issues Arising From
Assessments
Checks for Rogue
or Lost Fuel
Elements
Duct Hanger
Integrity and
Failure Modes
Corrosion Effects
on Inventory
APPENDIX H
ALARP Assessment
Details
Tidal Flooding
Seismic Hazard
affecting the
Boilers
ALARP
Assessment of
Seismic
Restraints
ALARP
Assessment of
Flood Protection
Compliance with
Requirements of
the
Decommissioning
APPENDIX I
Safestore Design and
Operational Functional
Requirements
ALARP
Assessment of
Welding Duct
Valves Shut
Summary of the
Fault Schedule
Radiological
Safety Case
Requirements
APPENDIX J
Safety-Related
Structures, Systems
and Components
Probabilistic
Assessment
Commitments
Contained within
the Fault Schedule
APPENDIX K
Verification Plan
Consideration of
Nuclear Licence
Conditions 32, 33
and 34
Determination
of Fault /
Hazard
Frequencies
Planning
Consents
EIAD
Regulatory
Considerations
ALARP
Assessment
APPENDIX E
Assumptions Made in
Producing Stage
Submission 1
APPENDIX F
Intelligent Customers
Consulted in Production
of Stage Submission 1
C&M
C&M Cases
Bradwell Final
C&M Report
SS1
Addendum
SS2
Addendum
SS3
Addendum
SS4
Addendum
SS5
Addendum
SS6
Addendum
SS7
Addendum
SS1
Reactor
Safestores
SS2
Ponds
SS3
Active Waste
Vaults
SS4
Contaminated
Land
SS5
ILW Storage
SS6
Site
Infrastructure
SS7
Safety
Management
SS5
SS6
Site B
SS1
SS2
SS3
SS4
SS7