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LHCb MUON - ADDITIONNAL SHIELD BEHIND M5 – UNIT AREA

LHCb MUON - ADDITIONNAL SHIELD BEHIND M5 – UNIT AREA. 7 00. 2 00. 600. 600. Dimensions of 1 iron brick  100 x 100 x 200 mm3 1 ROW of 1200 mm length  12 iron blocks / row Shielding area 1200 x 700 mm2  7 x 12 = 84 iron blocks

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LHCb MUON - ADDITIONNAL SHIELD BEHIND M5 – UNIT AREA

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  1. LHCb MUON - ADDITIONNAL SHIELD BEHIND M5 – UNIT AREA 700 200 600 600 Dimensions of 1 iron brick  100 x 100 x 200 mm3 1 ROW of 1200 mm length  12 iron blocks / row Shielding area 1200 x 700 mm2  7 x 12 = 84 iron blocks Shielding area 4800 x 700 mm2  4 x 84 = 336 iron blocks Weight of 1 iron brick  15 kg Total weight of shield  5040 kg D.LACARRERE

  2. ADDITIONNAL IRON SHIELD BEHIND MUON CHAMBERS M5 HALF SHIELD – SCHEMATIC VIEW 2400 BELT (*) 700 IRON BLOCKS MF4 NO SCALE (*) Belt in order to fix the iron blocks – not yet defined D.LACARRERE

  3. STATUS 5 DECEMBER 2011 (in brief) • IRON BLOCKS : ~ 400 blocks available (250 at Pit2 + 150 at Pit8) ; non “TFA” • - RP CHECK : Ask for authorization to blast the blocks – corroded surfaces - on going • SURFACE TREATMENT (in preparation) : • a) blasting with special sand (garnet 30-60 mesh) – DAI 479609 08/11/2011 • b) painting before X-MAS – drying during Christmas break. • SCHEDULE : • 1 - Blasting week 12/12/2011 • 2 - Painting week 19/12/2011 • 3 - Installation top of MF4 – mid-January 2012 (to be specified by Muon Group) D.LACARRERE

  4. UPDATED STATUS • 16 JANUARY 2012 (in brief) • IRON BLOCKS : ~ 363 blocks available (208 from Pit2 + 155 from Pit8) ready to send to the firm for cleaning & painting just before X-MAS; BUT •  Unfortunately the last radiological check performed on 19 Dec. 2011 revealed that a few blocks from the batch Pit2 were TFA (unexpected ). •  Transfer to Firm (MENONI -74 SCIENTRIER) scheduled for 20/12/2011 was stopped. •  Systematic RP control of all the blocks (all faces) was required by the CERN/RP Group. •  Systematic RP Control performed by RP Group on 10 January 2012 at Pit8 ; 46 blocks from the batch (Pit 2) were classified TFA as suspected before X-MAS; in order to replace these TFA blocks 50 additional blocks (non-TFA) were recovered (from BA7 & Area 19)  NOW we have 390 blocks dedicated to MUON filter, available for cleaning & painting. •  Transfer of the 390 blocks to be treated outside CERN (MENONI Company) was performed on 16 January 2012 (am) as scheduled. •  Return of blocks to CERN : Progressively , last batch expected for Fri. 10 February 2012. •  Installation behind M5 (end) : Week 07 from 13 to 17 Feb. 2012. D.LACARRERE

  5. ADDITIONNAL IRON SHIELD - FIXATION (PROPOSAL) ADDITIONAL SHIELD SIDE VIEW METALLIC SHEETS 780 200 20 BELTS 20 EXISTING HOLES CONCRETE BEAM 800 700 180 STEEL WEDGE 25 MM 25 350 180 400 400 MF4 CONCRETE SUPPORT NO SCALE D.LACARRERE

  6. ADDITIONNAL IRON SHIELD - FIXATION (PROPOSAL) BEAM AXIS FRONT VIEW CONCRETE BEAM ADDITIONAL SHIELD 5900 COVER METALLIC SHEET 4800 700 MF4 NO SCALE SAFETY BELTS D.LACARRERE

  7. ADDITIONNAL IRON SHIELD - FIXATION (PROPOSAL) BEAM AXIS TOP VIEW CONCRETE BEAM ADDITIONAL SHIELD COVER METALLIC SHEET 5900 4800 2540 920 2540 700 MF4 NO SCALE SAFETY BELTS D.LACARRERE

  8. RECAP • MATERIAL & EQUIPMENT NEEDED •  336 steel blocks 100 x 100 x 200 mm3 (*) •  2 steel sheets 600 x 300 x 15 for fixing belts (side beam) •  Steel wedges : 1200 x 180 x 25 ; 4 pieces •  Cover sheets (L shape) : 600 x 720 thick = 10 ; 2 pieces •  Cover sheets (L shape) : 300 x 700 thick = 10 ; 2 pieces • 2 belts ( 7 m long) • (*) DAI 4839860 (3500 EUR) 11/01/2012 – CA1554907 23/12/2012 (MENONI) D.LACARRERE

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