nbi03 rangod

CERN - CNGS Project: 

CERN - CNGS Project NBI2003 HORN RADIOACTIVE HANDLING

Summary: 

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

CNGS Underground structures(target area) : 

CNGS Underground structures (target area)

TCC4 Handling equipment: 

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 weight of 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

Area covered by the main hoist (cross section): 

Area covered by the main hoist (cross section)

Lifting beam proposal: 

Lifting beam proposal Extremity hooks used for the horn handling

CNGS Horn – general assembly: 

CNGS Horn – general assembly Courtesy S. Wallon/LAL Stirrups fixed to the base frame of the horn

Horn and stripline arrangement (Shielding not shown): 

Horn and stripline arrangement (Shielding not shown) Fast Coupling System Stripline part 3 Stripline part 1 Link section HORN BEAM

Slide9: 

Horn removal procedure (Disconnection of the Fast Coupling System) Passageway Courtesy S. Wallon/LAL

Slide10: 

Horn removal procedure (Disconnection of the Fast Coupling System) Courtesy S. Wallon/LAL

Horn removing sequences (Top view): 

Horn removing sequences (Top view) HORN Sequence 1 Through the side wall, unscrew the 5 nuts (M16) on the Fast Coupling System to release the horn from the stripline part 1 Stripline 1

Horn removing sequences (Top view): 

HORN Sequence 2 Manually remove the link section located in the trench Disconnect the cooling water flexible tube Stripline 1 Horn removing sequences (Top view)

Slide13: 

HORN Sequence 2 Manually remove the electrical link located in the trench Disconnect the cooling water flexible tube Horn removing sequences (Top view)

Slide14: 

HORN Sequence 3 From the passageway, slide stripline 1 downstream By 100 mm Horn removing sequences (Top view)

Slide15: 

HORN Sequence 3 From the passageway, slide stripline 1 downstream By 100 mm Horn removing sequences (Top view)

Slide16: 

Stripline Part 1 Stripline Part 2 Stripline Part 3 Horn removing sequences (Artist view) Courtesy: LAL/Orsay BEAM

Horn removing sequences (Cross section): 

Horn removing sequences (Cross section) Concrete Iron Marble Fast Coupling System Trench Link sections Stripline 2 Stripline 3 Access galleryTSG43 Sequence 4 With the crane, remove the iron blocks of the top shield (automatic clamping system) Passageway

Slide18: 

Concrete Marble Fast Coupling System Trench Stripline 2 Stripline 3 Access galleryTSG43 Sequence 4 With the crane, remove the iron blocks of the top shield (automatic clamping system) Link sections Passageway Horn removing sequences (Cross section)

Slide19: 

Concrete Marble Fast Coupling System Trench Stripline 2 Stripline 3 Access galleryTSG43 Sequence 5 With the crane, remove the top blocks of the side shielding wall and those in front of the Fast Coupling System Link sections Passageway Horn removing sequences (Cross section)

Slide20: 

Concrete Marble Fast Coupling System Trench Stripline 2 Stripline 3 Access galleryTSG43 Link sections Sequence 5 With the crane, remove the top blocks of the side shielding wall and those in front of the Fast Coupling System Passageway Horn removing sequences (Cross section)

Slide21: 

Concrete Marble Fast Coupling System Trench Stripline 2 Stripline 3 Access galleryTSG43 Sequence 6 The horn is then transported upstream, with the crane to the junction chamber Link sections Passageway Horn removing sequences (Cross section)

Slide22: 

Concrete Marble Trench Stripline 2 Stripline 3 Access galleryTSG43 Link sections Sequence 6 The horn is then transported upstream, with the crane to the junction chamber Passageway Horn removing sequences (Cross section)

Slide23: 

Concrete Marble Trench Stripline 2 Stripline 3 Access galleryTSG43 Link sections Sequence 6 The horn is then transported upstream, with the crane to the junction chamber Passageway Horn removing sequences (Cross section)

Slide24: 

By hand adjustable part (SL1) Iron Sequence 7 Lower the horn onto a motorized trailer* in the junction chamber * Under development Horn base frame Guiding rail Lifting beam device Junction chamber extension Horn removing sequences

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

Proton beam tunnel Ventilation Chamber Hook limits Service gallery Storage chamber 15 m Slope 2% 20 m Access gallery Slope 5.6% Target chamber Guiding rail embedded in the concrete Transport of the horn (from the target chamber to the storage gallery) Junction chamber

Horn exchange installation sequences: 

Horn exchange installation sequences 1- The spare horn is brought to the junction chamber, picked up by the crane and 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 and fine 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

Conclusions: 

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 procedure must 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