1 10 October 2013 PowerPoint Presentation

1 10 October 2013 PowerPoint Presentation

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CENF: APR Outline. Preliminary Risk Analysis for CENF SB areas. Why do we need it and what will it indicate?. How is it done, and our experience from previous studies,. How will we organise ourselves?. ID: 273216

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10 October 2013

CENF: APR Outline

Preliminary Risk Analysis for CENF SB areas

Why do we need it and what will it indicate?

How is it done, and our experience from previous studies,

How will we organise ourselves?

Schedule.

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10 October 2013

CENF: APR Outline

Why do we need an APR?

As part of the safety documentation: we need to identify all potential hazards and install appropriate controls.

This is an ongoing activity, for all the potential types of hazards to people or the environment, we will set barriers, procedures and working methods to control diverse risks such as electrocution, radiation, falling from heights, asphyxiation…

To specify the access control and safety systems.

The access control and safety systems can protect people from several types of danger while still allowing access when the hazards are removed: radiation from beams, activated air and electrocution if exposed conductors are needed.

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10 October 2013

CENF: APR Outline

The Access Control and Safety Systems

The control and Safety systems are sophisticated and highly reliable.

The level of reliability needed (risk of failure) depends on the level of danger.

The cost and complexity increases dramatically with high risks of injury or death.

The systems are elaborated under the Standard IEC 61508.

IEC 61508

Using the standard process allows a cross-check with other studies.

Standardised notation enables independent verification.

The standard covers the design, realisation and operation of the safety systems.

It starts with the APR, which is made and checked by qualified Functional Safety Engineers.

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10 October 2013

CENF: APR Outline

Preliminary Risk Analysis for CENF SB areas

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10 October 2013

CENF: APR Outline

The APRWe identify all the risks in an area Estimate the gravity of each oneEstimate the probability of each oneAssign a “risk” scoreIdentify other barriers and controls which can reduce that riskThis leaves the safety level required to manage the hazard; SIL1, 2, 3 or 4.The highest SIL level defines the system.

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10 October 2013

CENF: APR Outline

Previous Experience of the APR process

The PS and SPS access systems followed this procedure.

Each was a painful series of meetings taking months to complete.

This was due, in part, to an unfamiliarity with the process by some participants.

How will we do it this time?: Separation of Roles

The WG will input and review data in three dedicated meetings.

GS-ASE will make the analysis and draw the conclusions separately.

The WG will be given the subjects before each meeting, and will come with answers and documents.

The conclusions will be presented in this meeting.

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10 October 2013

CENF: APR Outline

Who will be in the working Group?

The information needed concerns the processes and working methods in the SB areas.

Equipment specialists for Electrical hazards and Crane operations,

Operating procedures, foreseen access cases,

RP estimates for each sector with beam and with activation of materials and air, (with respect to human doses: within limits, injury or death with 1 hour or 1 day exposure)

Ventilation conditions for operation and for access.

So: M. Calviani, M. Nessi, R. Steerenberg, H. Vincke, F. Valentini, J. Devine,

M.

Battistin

, C. Bertone and K. Kershaw. Or their replacements.

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10 October 2013

CENF: APR Outline

Three Meetings: 1

Starting at 10h30 following this meeting.

Thursdays

7

th

and 21

st

November and December 5

th

The first meeting will be to define the hazard level and probability of the different risks and ensure that all risks have been included.

This

will also need the existing (planned) measures to be documented in the SB meetings, including methods and procedures for accessing the target

vault and Morgue.

 

GS-ASE and I will then assign SIL levels as needed for the residual risks.

 

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10 October 2013

CENF: APR Outline

Three Meetings: 2

Starting at 10h30 following this meeting.

Thursdays 7

th

and

21

st

November

and December 5

th

 

The second meeting will review these analyses and add any that may have been overlooked.

This

will expose the need for interlocks on EIS for beam protection, RP monitors, Horn electrical equipment and Ventilation status. Operating procedures will also be defined: Patrol searches, checklists and permits.

These

items will be distributed for agreements and clarifications in the responsible groups.

 

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10 October 2013

CENF: APR Outline

Three Meetings: 3

Starting at 10h30 following this meeting.

Thursdays 7

th

and 21

st

November and

December 5

th

  

The third meeting will review the agreed measures and the documented responses from the groups concerned.

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CENF: APR Outline

Questions?

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