CERN - CNGS Project

NBI2003

HORN RADIOACTIVE HANDLING

November 2003

CERN - S. Rangod/EP1Summary•

1 Underground structures
General layout of the target chamber (horn area)•2 Handling equipment in the target chamber
2.1 - Crane (main characteristics, limits, precision …)
2.2 - Crane lifting beam•

3 Horn exchange procedure (removal)
3.1 - Horn disconnection from the strip-line (Fast Coupling System)
3.2 – Removal sequence (shield arrangement under development)•4 Horn transport to the storage gallery for “hot components”
General layout of the underground areas concerned•

5 Spare horn installation
Installation procedure•

6 Conclusions

November 2003

CERN - S. Rangod/EP

2

CNGS Underground structures(target area)
Storage gallery

Neutrino accessgallery

Junction chamber
Ventilation chamber

2.24%

Target chamber

Storagegallery

1.15%

Access gallery

HORN

Horizontal floor

2%

STRIPLINE

Slope 5.66%
Ventilationchamber

Service gallery
Proton beam line

Junction chamber

Target Chamber

Access galleries
PULSE TRANSFORMER

November 2003

CERN - S. Rangod/EP3

TCC4 Handling equipment•TCC4 gallery is equipped with a radiation hard underslung crane. The very
limited space and safety aspects make the crane quite complicated.

•Main parameters:– Maxi working load of the main hoist: 7.5 T corresponding to the weightof the heaviest CERN shielding blocks– Maxi working load of the auxiliary hoist: 5 T– Theoretical positioning precision: +/- 2.5 mm– Slope: 5.66 % (identical to the beam slope and TCC4 floor)– Stainless steel rails and racks– One video camera fixed on the main hoist chariot

November 2003

CERN - S. Rangod/EP4

Area covered by the main hoist (cross section)
3400

Area covered by the main hoist
Area covered by
the auxiliary hoist

1950

1800
1000

Shield
4525

3600
2800

1600

Horn outer conductor

3000

Approachdistances
Mainmainhoist hoist
Limitdistancesof oftheNovember 2003

CERN - S. Rangod/EP

5

R20

555

45

Lifting beam proposal

250

Specific hooks with adj
ustable position (shapenot15

All pawls will be removed later (after handling tests and first installation)

yet determined)

388

The central rotating
double hook can beblocked each 90°

11 x 50 (pitch)2020 (maxi)
2700 between extrem
ity hooksTotal length: 3000 maxi

Extremity hooks used for the horn handling

November 2003

CERN - S. Rangod/EP

WL 3750 Kg
r260

Working Load7500 Kg
920 (mini)

WL 3750 Kg

3600 to the TCC4 floo

10232

0
Ø3

Slope: 5.66 %6

CNGS Horn – general assembly

Stirrups fixed tothe base frame of the horn

Courtesy S. Wallon/LAL

November 2003

CERN - S. Rangod/EP

7

Horn and stripline arrangement(Shielding not shown)

HORN

BEAM

Fast Coupling System

Stripline part 1

Stripline part 3

Link section
Stripline part 2November 2003

CERN - S. Rangod/EP

8

Horn removal procedure(Disconnection of the Fast Coupling System)

Shielding wallsPasw
ag eayCourtesy S. Wallon/LAL

November 2003

CERN - S. Rangod/EP

9

Horn removal procedure(Disconnection of the Fast Coupling System)

Opening for access to the nutsof the Fast Coupling System
Shielding wallsPasw
ag e

ay

Courtesy S. Wallon/LAL

November 2003

CERN - S. Rangod/EP

10

Horn removing sequences (Top view)
Iron collimator

Fast Coupling System

TargetTrench

HORN
BEAM

Stripline 1
Link section

Stripline 2Passageway

Side wall shielding

Sequence 1
Through the side wall, unscrew the 5 nuts (M16)on the Fast Coupling System to release the hornfrom the stripline part 1

Stripline 3
November 2003

CERN - S. Rangod/EP

11

Horn removing sequences (Top view)
Iron collimator

Fast Coupling System

TargetTrenchHORN
BEAM

Stripline 1
Link section

Passageway

Side wall shielding

Sequence 2
Stripline 2

Manually remove the link section located in the trench
Disconnect the cooling water flexible tube

Stripline 3
November 2003

CERN - S. Rangod/EP

12

Horn removing sequences (Top view)
Iron collimator

Fast Coupling System

TargetTrenchHORN
BEAM

Stripline 1
Passageway

Side wall shielding

Sequence 2
Stripline 2

Manually remove the electrical link located in the trench
Disconnect the cooling water flexible tube

Stripline 3
November 2003

CERN - S. Rangod/EP

13

Horn removing sequences (Top view)
Iron collimator

Fast Coupling System

TargetTrenchHORN
BEAM

Stripline 1
Passageway

Side wall shielding

Sequence 3
Stripline 2

From the passageway, slide stripline 1 downstream
By 100 mm

Stripline 3
November 2003

CERN - S. Rangod/EP

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Horn removing sequences (Top view)
Fast Coupling System

Iron collimator

TargetTrench

HORN
BEAM

Stripline 1
100 mmPassageway

Side wall shielding

Sequence 3
Stripline 2

From the passageway, slide stripline 1 downstream
By 100 mm

Stripline 3
November 2003

CERN - S. Rangod/EP

15

Horn removing sequences (Artist view)
Courtesy: LAL/Orsay

BE

Fast Coupling System
AM

Stripline Part 1
Stripline Part 3
Stripline Part 2

Link section
November 2003

CERN - S. Rangod/EP

16

Horn removing sequences (Cross section)
Sequence 4
With the crane, remove the iron blocks of the top shield (automatic clamping system)Iron

Access galleryTSG43
Stripline 3

MarbleConcrete

Stripline 1
Passageway
Stripline 2
TrenchFast Coupling System

Link sections
November 2003

CERN - S. Rangod/EP

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Horn removing sequences (Cross section)
Sequence 4
With the crane, remove the iron blocks of the top shield (automatic clamping system)

MarbleAccess galleryTSG43
Stripline 3

Concrete

Stripline 1
Passageway
Stripline 2
TrenchFast Coupling System

Link sections
November 2003

CERN - S. Rangod/EP

18

Horn removing sequences (Cross section)
Sequence 5
With the crane, remove the top blocks of the side shielding wall and those in front ofthe Fast Coupling System

MarbleAccess galleryTSG43
Stripline 3

Concrete

Stripline 1
Passageway
Stripline 2
TrenchFast Coupling System

Link sections
November 2003

CERN - S. Rangod/EP

19

Horn removing sequences (Cross section)
Sequence 5
With the crane, remove the top blocks of the side shielding wall and those in front of
the Fast Coupling System

MarbleAccess galleryTSG43
Stripline 3

Concrete

Stripline 1
Passageway
Stripline 2
TrenchFast Coupling System

Link sections
November 2003

CERN - S. Rangod/EP20

Horn removing sequences (Cross section)
Sequence 6
The horn is then transported upstream, with the crane to the junction chamber

MarbleAccess galleryTSG43
Stripline 3

Concrete

Stripline 1
Passageway
Stripline 2
TrenchFast Coupling System

Link sections
November 2003

CERN - S. Rangod/EP

21

Horn removing sequences (Cross section)
Sequence 6
The horn is then transported upstream, with the crane to the junction chamber

MarbleAccess galleryTSG43
Stripline 3

Concrete

Stripline 1
Passageway
Stripline 2
TrenchLink sections
November 2003

CERN - S. Rangod/EP

22

Horn removing sequences (Cross section)
Sequence 6
The horn is then transported upstream, with the crane to the junction chamber

MarbleAccess galleryTSG43
Stripline 3

Concrete

Stripline 1
Passageway
Stripline 2
TrenchLink sections
November 2003

CERN - S. Rangod/EP23

Horn removing sequences

IronJunction
By hand adjustable partchamber(SL1)extension

Lifting beam device

Horn base frame
Trailer
Guiding rail

Sequence 7Lower the horn onto a motorized trailer* in the junction chamber* Under development
November 2003

CERN - S. Rangod/EP24

Transport of the horn(from the target chamber to the storage gallery)

Ac ces s

Shielding blocks

Storage chamber

Guiding rail embedded in the concrete

gall

er y

Ventilation Chamber

Service gallery
Junction chamber

20 m

15 m

Proton beam tunnel

Slope2%

Slope 5.6%

Hook limits

Target chamber

November 2003

CERN - S. Rangod/EP25

Horn exchange installation sequences
1- The spare horn is brought to the junction chamber, picked up by the craneand installed on the adjustable feet (positioning tolerance: r = 50 mm)
2- The horn alignment can be checked, if necessary, at this stage.
Both horns are supposed to be identical to +/- 0.5 mm tolerances.
3- The shielding is re-installed, except for the block(s) in front the FCS.
4- From the passageway, slide stripline 1 upstream by 100 mm andfine adjust to the exact position of the horn.
5- The five nuts of the FCS are tightened.
6- The shielding blocks are placed in position in front of the FCS .
7- In the trench, outside the shielding the link section is reinstalled.
8- The cooling water flexible tube is re-connected

November 2003

CERN - S. Rangod/EP26

Conclusions

Even if…
- Positioning tolerances of the crane conform to the technical specifications- All horn tolerances are respected- Fast coupling system is now much more easy to operate (new design)- Fine adjustment of the strip-line can be done from the passageway (new design)… the exchange of the horn remains a major operation. The proceduremust be carefully prepared and fully tested before the beam starts.

Outstanding:- Trailing hoses (water cooling + inert gas)
- Final shielding configuration- Automatic clamping tool for shielding blocks- Trailer design

November 2003

CERN - S. Rangod/EP27