The international harmonization project

GEOSAF 2

Outcomes of the group work on the GEOSAF 2 TECDOCand plans for future work

Michael TICHAUERMay 2014

GEOSAF 2Plenary meeting

2GEOSAF 2 - May 2014 – TECDOC revision / outcomes of the working groups

GEOSAF 2 : Plenary meeting Vienna May 2014

GROUP WORK on the GEOSAF 2 TECDOC▌3 working groups

1 moderator + 1 rapporteur / excellent outcomes from each group!

Areas where a consensus has been found

Recommendations for modifications of terminology

Recommendations for updates or clarification

Recommendations for additional items to be embedded in the document

▌Plans for integrating these recommendations

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GEOSAF 2 TECDOC: Consensus

Areas where a consensus has been found The rationale behind the building of a TECDOC

The general structure of the document

The core concepts of design target, safety envelope and as-built state

The use of these concepts in compliance control (monitoring, management systems, including requirement management)

The building and review of an integrated safety case which includes these concepts

The use of the safety case as a tool to check whether the facility is heading in the right direction during the operational phase and will deliver safety functions necessary for long-term safety

VIEHIFTG05

GEOSAF 2 - May 2014 – TECDOC revision / outcomes of the working groups

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GEOSAF 2 TECDOC : Terminology Recommendations for modification of terminology

▌ Initial state

get rid of “initial state”, since it may be confusing and of little use in the TECDOC

▌ Timeframes

Use “operational phase”, “pre-operational phase”, “operational safety”, “closure phase” and “at the end of closure”; get rid of “pre-closure”

Add a diagram explaining the relationships between the phases (e.g. from the group 3 diagram or the SSM diagram)

Make sure “closure” is correctly addressed as part of the operational phase and add it in the left box of the “loop” diagramGEOSAF 2 - May 2014 – TECDOC revision / outcomes of the working groups

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GEOSAF 2 TECDOC : ClarityRecommendations for updates or clarification

▌Emphasise “passive safety” in the introduction

▌Complement safety case definition with that from NEA

▌Introduce the need for delivery of safety functions up front in chapter 1

▌Simplify and normalize the structure of the introduction (background-objectives-scope)

▌Clarify the scope of parameters in chapter 3 and 4 (not only quantitative, not only related to EBS, not only measurable…)

▌Clarify the role of the regulator in the definition of the Safety Envelope

▌Make a link with the impact of pre-disposal activities on the SE

▌Complement chapter 3 with a reference to robustness

▌Clarify the role of operational limits and conditions in chapter 4

▌Clarify “review SC update SC” in chapter 5

GEOSAF 2 - May 2014 – TECDOC revision / outcomes of the working groups

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GEOSAF 2 TECDOC : desirable additions (1)

Recommendations for additional items (major)▌ 3 additional paragraphs at the beginning of chapter 4

Tension between a “flexible” SE and a “conservative “SE”

Plan for issues: avoid an overambitious SE

▌ Management of uncertainties

Add in chapter 2, as an essential part of the SC

Consider the implication on the handshake

Make a comprehensive link with the work produced in PRISM

Consider the link between margins DTSE and uncertainties

Consider design change during the operational period due to uncertainties and list possible causes for design change

GEOSAF 2 - May 2014 – TECDOC revision / outcomes of the working groups

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GEOSAF 2 TECDOC : desirable additions (2)

Recommendations for additional items (minor)▌ Elaborate on the specific risks associated with GD in

chapter 1

▌ Add memory as a specific feature to take into account in chapter 1

▌ Modify title of 2.1

▌ Add the “handshake diagram” for clarification purposes

▌ Add titles/numbers to all diagrams/ Bring visual coherence to diagrams

▌ Add as many examples as possible

Possible actions when a deviation is found (including design changes)

Adapt the example on DT (defective packages)GEOSAF 2 - May 2014 – TECDOC revision / outcomes of the working groups

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GEOSAF 2 TECDOC : way forward

Core group tasks▌ Discussion on key areas

▌ Development of the major recommended additions

▌ Additional technical meeting in Q4-2014 to prepare updated report

▌ Anyone willing to join the CG?

▌ Final draft version (v4) will be sent to all GEOSAF members for verification of compliance with the recommendations by end 2014 (hopefully)

GEOSAF 2 - May 2014 – TECDOC revision / outcomes of the working groups

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▌ Thank you!

The international harmonization project

GEOSAF 2

GEOSAF 2 - May 2014 – TECDOC revision / outcomes of the working groups