Dismantling LEP and the Dismantling LEP and the ExperimentsExperiments

Access to the underground areas, Access to the underground areas,

project organisation, coordination project organisation, coordination

and safetyand safety

The ObjectiveThe Objective

Empty the tunnel and the Empty the tunnel and the

experimental cavernsexperimental caverns safelysafely

efficientlyefficiently

in a short timein a short time

Some numbersSome numbers

Tens of thousands of componentsTens of thousands of components

30,000 tonnes of equipment in the 30,000 tonnes of equipment in the

machine plus 10,000 tonnes in the machine plus 10,000 tonnes in the

experimentsexperiments

Almost 50% of the machine to Almost 50% of the machine to

remove before Christmas 2000remove before Christmas 2000

What is the timescale?What is the timescale?

ON THE LHC CRITICAL PATHON THE LHC CRITICAL PATH

LEP physics DELPHI dismantling LHC CE

LEP physics OPAL dismantling LHC CE

LEP physics ALEPH dismantling LHC CE

LEP physics L3 dismantling LHC CE

LEP physics LEP dismantling LHC CE

1 June 2001

1 April 2001

15 July 2001

1 June 2001

1 Mar 2002

2 Oct 2000

IP 2

IP 4

IP 6

IP 8

Who is involved?Who is involved? CERN personnelCERN personnel

Contract staffContract staff

Visiting experimental teamsVisiting experimental teams

Laboratory Laboratory Construction site Construction site New safety issuesNew safety issues

Some new major constraintsSome new major constraints

Severalhundred people

Installation Nucléaire de Base Installation Nucléaire de Base ((INBINB))

What is it ?What is it ?

Why did CERN sign ?Why did CERN sign ?

How radioactive are LEP and the experiments ?How radioactive are LEP and the experiments ? LEP: Low induced radioactivityLEP: Low induced radioactivity

((Très Faiblement Actif - Très Faiblement Actif - TFA TFA ))

Experiments: only the calibration sources are Experiments: only the calibration sources are

radioactive ( radioactive ( TFA TFA ))

INBINB:: What does it mean for the dismantling What does it mean for the dismantling ??

CERN and the French authorities CERN and the French authorities

have agreed procedures and ruleshave agreed procedures and rules zoning, traceability and waste management ... zoning, traceability and waste management ...

These must be explained to These must be explained to

everybody involved in this projecteverybody involved in this project

They must be strictly followed They must be strictly followed

INBINB:: Radiological Zoning Radiological Zoning ProcedureProcedure

the process of identification of the the process of identification of the

radioactive elements, based on radioactive elements, based on

the original design, calculations the original design, calculations

and operational experienceand operational experience

Zoning of the ExperimentsZoning of the Experiments

But: Many weak radioactive calibration sources inside the detectors!- hence the requirement to wear a film badge and electronic dosimeter at all times.

LEPLEP

Very small activities expected

TFA TFA

Luminositymonitors

Conventional

Conventional

Zoning of LEPZoning of LEP

NUCLEAR ZONESNUCLEAR ZONES

Wearing a film badge and an electronic dosimeter is obligatory for Wearing a film badge and an electronic dosimeter is obligatory for all personnel working on equipment classified as TFA ( slightly radiall personnel working on equipment classified as TFA ( slightly radioactive). Areas containing TFA materials will be clearly markedoactive). Areas containing TFA materials will be clearly marked

Here is a schematic example of such an areaHere is a schematic example of such an area

D > 25 µSv/hOR

D < 25 µSv/h

RADIATION

ZONECONTROLEE

CONTROLLEDAREA

FILM BADGEWEAR YOUR

PORTER VOTRERP

INBINB:: Practical Implications for Practical Implications forthe LEP machinethe LEP machine

Traceability of Traceability of allall material material label equipment and containers with barcodeslabel equipment and containers with barcodes

record movements and measurementsrecord movements and measurements in the tunnel in the tunnel

at the surfaceat the surface

at the storage/transit areasat the storage/transit areas

during storageduring storage

when the equipment leaves CERNwhen the equipment leaves CERN

SystematicSystematic radiation checks radiation checks

INBINB:: Practical implications for Practical implications forthe experimentsthe experiments

Material disposalMaterial disposal Only Only TFATFA material treated like LEP material treated like LEP

material (traceability)material (traceability)

But But allall material undergoes material undergoes

systematic radioactivity testssystematic radioactivity tests

MonitorsMonitors 1 RP technician / experiment (8 h/day)1 RP technician / experiment (8 h/day)

1 RP technician + 1 tracer / pit (8 h/day)1 RP technician + 1 tracer / pit (8 h/day)

1 tracer per site (dispatcher at surface) (8 h/day)1 tracer per site (dispatcher at surface) (8 h/day)

1 RP technician + 2 tracers in the transit zone (8 h/day)1 RP technician + 2 tracers in the transit zone (8 h/day)

1 mobile team composed of1 mobile team composed of

1RP technician + 1 tracer (8 h/day)1RP technician + 1 tracer (8 h/day)

1 Site watchman / pit (24 h/day)1 Site watchman / pit (24 h/day)

Constraints Concerning the EquipmentConstraints Concerning the Equipment Removal restricted toRemoval restricted to

Mon -Fri, 8-12 h and 13-17 hMon -Fri, 8-12 h and 13-17 h

Transfer of equipment between the Transfer of equipment between the

experiments and the LEP tunnel is strictly experiments and the LEP tunnel is strictly

prohibited.prohibited.

PASSAGE MATERIALSTRICTEMENT INTERDIT

PASSAGE OF EQUIPMENTSTRICTLY FORBIDDEN

Consequently, access to the caverns andtunnel is restricted to Mon-Fri, 7-19 h

How it affects youHow it affects you AccessAccess

Access card with UX / U clearanceAccess card with UX / U clearance

- issued after attending this briefing- issued after attending this briefing

SafetySafety Helmet, safety shoes, gas mask, film Helmet, safety shoes, gas mask, film

badge, safety zonebadge, safety zone

On-site team briefingsOn-site team briefings

TARGET: ZERO ACCIDENTSTARGET: ZERO ACCIDENTS

Respect the RulesRespect the Rules- - and encourage others to, as welland encourage others to, as well

Violation of rules may lead to Violation of rules may lead to Halting the dismantlingHalting the dismantling

Halting the physics programmeHalting the physics programme

Serious damage of CERN’s Serious damage of CERN’s

reputationreputation

Important Phone NumbersImportant Phone Numbers Fire brigade Urgent :Fire brigade Urgent :

use a use a red telephonered telephone

from a CERN telephone: from a CERN telephone: 112

from a mobile phone:from a mobile phone: +41 22 76 74444

Fire brigade (non-urgent): Fire brigade (non-urgent): 74444

Technical Services problemsTechnical Services problems Contact the Site Manager orContact the Site Manager or

Tech. Contr. Room: Tech. Contr. Room: 72201

Ask your Supervisor / Team LeaderAsk your Supervisor / Team Leader

On LEP Dismantling ProjectOn LEP Dismantling Project Project leader: John Poole Project leader: John Poole

WEB page: WEB page: http://cern.ch/lep-dismantling

On Experiments DismantlingOn Experiments Dismantling WEB page: WEB page:

Ask your Supervisor / Team LeaderAsk your Supervisor / Team Leaderor the GLIMOSor the GLIMOS

Co-ordinator: Christian Joram, Co-ordinator: Christian Joram,

78909, 16041478909, 160414

http://www.cern.ch/exp-dismantling/info.htm

CERN's FUTURECERN's FUTURE

Good luck to Good luck to everyone everyone !!Good luck to Good luck to everyone everyone !!

Accident – Fire : Tel. 112 or RED Telephone or 74444. Technical Services Breakdown: Tel. 72201

LEP TUNNEL – Dismantling AreaFollow the rules concerning access and removal of equipment

You must hold a valid access card and wear a film badge in the areas indicatedPersonnel Access between : 7h00 – 19h00Equipment removal between: 8h00 – 12h00 & 13h00 – 17h00

Radiation measurements and Traceability compulsory for all equipment

No visitors

Transport of equipment between the machine tunnel and the experiments strictly forbidden

No smoking

No litter – keep the areas clean

Beware of heavy handling machinery

Safety helmets and safety shoes compulsory

DELPHI - Dismantling WorksiteRespect conditions of access and material removal

Access card and film badge compulsoryWorking hours for personnel: 7h00-19h00Removal of material: 8h00 - 12h00, 13h00 - 17h00

Compulsory control of radioactivity of materials

Safety helmet and Safety shoes compulsory

No smoking - Keep clear and tidy

Beware of handling gear operations and transport vehicles: Keep clear

Do not pass under the handling shaft

Visits forbidden

------------------------------------------------Accident, Fire: Telephone 112 or Red Telephone or 74444

Breakdown Service: Telephone 72201GLIMOS 160626

TRACEABILITYTRACEABILITY

R.Billen SL/MR

Dismantler

Cables

Container

Hand written label(Type, half cell)

Transport

Somewherein the tunnel

On the surface

Dispatcher

Tracer

Barcode

At the bottom of the shafts

TIS/RP

Start 2 Oct. 2000

PM15PM18PX24PM25PM45PM65PM85

LEPPits

Distribution of materials from the INB

ISR879…

LHCTT10…

For re-use

CERN

Radioactive waste

TIS/RP Zone (ISR)

R. BillenSL/MR/DBS

CE

RN

For sale/scrap

Transit Zone

Recycling,Institutes,labs, …Weighing

RADIATION GATE MONITOR

CERN