goal & requiremnts -...

Goal & Requiremnts

• Dedicated R2E Session in Chamonix 2010

• There we’ve to present a draft ‘long-term plan’

• That leaves us ~2 months, i.e., 4-5 R2E meetings

• For a reasonable ‘proposal’ many things are unknown

or pending

• We’ve to put the focus on filling the gaps as much as

possible

October 21st 2009 1Requirements for R2E Long-Term Plan

Long-Term Plan Strategy• Early measurements of radiation levels, experience during operation

(observed failures) and updated simulations define criticality and a rough

time limit when shielding mitigation actions will reach their limits– Problem: until end of December we’ll (‘hopefully’) not learn much

• Solutions for all critical areas are studied in parallel and prepared whenever

possible – Shielding & Relocation– Problem: until end of December we don’t have enough time

• Action plan with instructions on how to deal with a situation where

equipment may fail if new civil engineering turn out not to be possible– Proposed by S. Weisz during the last meeting -> additional shielding?, reduced

intensity?, local relocation?

• New equipment to be installed in critical areas has to follow requirements

defined by a new radiation policy for the accelerator sector (design, testing,

redundancy,…)– Problem: getting a final Policy (even advanced draft) by January is challenging


To get a consistent proposal by Chamonix2010 is a CHALLENGE

LHC Tunnel Requirements• Known problems:

– New WordFIP (issue solved for nQPS), i.e., problematic for new equipment

and ?replacements?

– SEE failure of BLM card -> however fail safe

– BPM intensity card (required for low intensities only)

– BPM uFIP cards -> not an issue as handled through orbit feedback

• Unknown problems:

– What did the past measurements miss?

– They will show up during operation or future test-campaigns

(what is required? – Daniel, Thijs?)

• All new equipment requires a full system design, testing (components

and system) and final approval (review) by the RadWG

• Missing:

– Update simulation studies for DS and ARC (in the moment we have a

range of ~three orders of magnitudes - FLUKA Team (in the moment low in

the priority list)

• Anything else?


Point 7 Requirements• What are the radiation levels in the RR73/77 and UJ76?

-> Operation

• Option to temporarily relocate betatron collimation to Point-3 (see memo)

• UJ76:

– How effective is the installed shielding wall (further improvement possible?)

– Relocation of equipment when possible and prepared

– Missing: • TZ76 remaining preparations – Sylvain?

• SafeRoom final solution (if shielding is not sufficient)

• Refined priority list of equipment (if necessary) – Thijs?

• Remaining cost estimate

• Ongoing simulations for additional absorbers – Markus

– ??? If additional absorbers and observed radiation levels proof possible –

do we stop the relocation ???

• RR73/77:

– Verification of shielding effectiveness during operation

– Missing:• Relocation options? – Sylvain, Anne-Laure?

• Related cost estimate

• Could additional absorbers also help there? – Markus

• Anything Else?


http://r2e.web.cern.ch/R2E/Related/CERN_Memorandum_IR3_jul2008.pdf

Point 7

RR73

RR77

UJ76


Point 8 Requirements• What are the radiation levels in the UX85b and the US85?

-> Operation

• US85:

– How effective is the installed shielding wall for the Safe-Room (further

improvement possible and to be decided on)

– Space available and identified for full relocation of equipment

– Final location and required shielding for Cryo-Equipment identified

– Cost estimate for cryo-removal exists

– Equipment inventory as complete as it gets

– Missing: • Integration study for full relocation – Anne-Laure?


• Order pending for cryo cabling – Serge (green light from Roberto/Markus?)

• Order pending for remote valve controllers? – Serge (green light from Roberto/Markus?)


• Updated simulations for more detailed studies (final layout, ULs and low-E neutrons, UW…)

– FLUKA Team (in the moment low in the priority list)

• What to do with the remaining equipment (in case problematic): transformers,… and UW

• TDI/TCTVB and maze to UA to be kept in mind (some FLUKA simulations ongoing)

• Anything Else?


Point 8

UX85b

US85


TI2 TI8 Requirements• What are the radiation levels in the UJ23/UJ87 and the

adjacent UAs?

-> Operation

• UJ23/UJ87:– New shielding walls installed - How effective are they? (further

improvement possible and to be decided on)

– Missing: • What will be the real operation load (dumps on the TED, losses on collimators)

– Operations, Ralph?

• Updated simulations for more detailed studies (current layout, shielding

options, losses on collimators, low-E neutrons) – FLUKA Team (Ketil’s next

step after collimation)

• Anything Else?


Point 1 Requirements• What are the radiation levels in the UJ14/16 and the adjacent ULs?

-> Operation

• Equipment inventory to be performed – PointOwners, Giovanni

• UJ14/16:

– First shielding layout studied through ICL

– Missing: • Updated simulations for more detailed shielding studies – FLUKA Team

• RR13/17:

– Past shielding proposal exists

– Missing: • Integration study for shielding proposal – Anne-Laure?

• Advanced relocation option – Sylvain?



• Updated simulations for more detailed shielding studies – FLUKA Team

• UPS14/16:

– Equipment was tested at CNGS? – Daniel, Thijs?

– Missing: • Updated simulations – FLUKA Team

• Anything Else?


Point 1

RR13 RR17

UJ14 UJ16

UPS14 UPS16


Point 1


Point 5 Requirements• What are the radiation levels in the UJ56 -> Operation

• Equipment inventory almost final – PointOwners, Giovanni

• UJ56:

– First shielding proposal exists (limited effectiveness for first floor!)

– Missing: • Advanced relocation option – Sylvain?



• Updated simulations for more detailed shielding studies – FLUKA Team (currently low in

priority)

• RR53/57:

– shielding proposal exists

– Missing: • Integration study for shielding proposal – Anne-Laure?

• Advanced relocation option – Sylvain?



• Updated simulations for more detailed shielding studies – FLUKA Team

• UPS56:

– Equipment was tested at CNGS? – Daniel, Thijs?

– Missing: • Updated simulations – FLUKA Team

• Anything Else?October 21st 2009 12Requirements for R2E Long-Term Plan

Point 5


Point 4 Requirements• What are the radiation levels in the UX45

-> Operation• Equipment inventory to be performed – PointOwners, Giovanni

• UX45:

– Possible: • Simulation update when residual gas-densities are measured – FLUKA Team

• Anything Else?


Point 4

UX45

PROBLEMATIC ONLY IF

LOSSES OR BEAM-GAS

DENSITIES ARE HIGHER

THAN EXPECTED


Point 6 Requirements• What are the radiation levels in the UX65

-> Operation• Equipment inventory to be performed – PointOwners, Giovanni

• UAs:– First shielding of ducts

– Monitoring prepared to have an early check of radiation levels

– Possible:• Additional shielding of the ducts

• Simulation update including the streaming through the duct – FLUKA Team

• UX65:

– Possible: • Simulation update when residual gas-densities are measured – FLUKA Team

• Anything Else?


Point 6

UX65

PROBLEMATIC ONLY IF

LOSSES OR BEAM-GAS

DENSITIES ARE HIGHER

THAN EXPECTED


Furthermore• Access Gates – shut-down during opertions – Rui

• Additional shielding penetrations and radiation levels (ducts

between RAs and UAs) -> depend on final residual gas

densities and streaming

• What to do when low-Energy neutrons become an issue


Not To Forget – Medium Termas soon as time windows appear:

• Early Relocations of identified critical equipments (Fire/ODH,

Timing, Remote Reset, PIC/WIC,…)

• New WordFIP and DeriveFIP development

• Additional shielding installation (preparations)

• Removal (or local relocation) of spare parts, especially when

under power

• Radiation tests of remaining components

• Further improvement of monitoring (battery driven RadMons,

next Generation RadMons)

• Check of remaining areas currently considered as not critical

(during operation)


Planning Constraints

• Current Schedule:

Operation:

Shut-Downs:

Operational Stops:

• Later Start-Up:

• Additional Interruptions:

• Earlier Stop of 2009/2010 Operation:

• or something else?


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