HORN RADI OACTI VE HANDLI NG CERN - CNGS Project CERN - S. Rangod/ - PDF document

1 HORN RADI OACTI VE HANDLI NG CERN - CNGS Project CERN - S. Rangod/ EP NBI 2003 November 2003

Summary • 1 Underground structures General layout of t he t arget chamber (hor n area) • 2 Handling equipment in the target chamber 2.1 - Crane (main charact erist ics, limit s, precision … ) 2.2 - Crane lif t ing beam • 3 Horn exchange procedure (removal) 3.1 - Horn disconnect ion f rom t he st rip-line (Fast Coupling Syst em) 3.2 – Removal sequence (shield arrangement under development ) • 4 Horn transport to the storage gallery f or “hot components” General layout of t he underground areas concerned • 5 Spare horn installation I nst allat ion procedure • 6 Conclusions November 2003 CERN - S. Rangod/ EP 2

CNGS Underground structures (t arget area) Storage gallery Neutrino access Neutrino access gallery gallery Junction chamber Ventilation chamber Ventilation chamber 2. 24% 2. 24% Target chamber St St orage orage gallery gallery 1. 15% 1. 15% Access gallery HORN Horizontal f loor Horizontal f loor 2% 2% STRI PLI NE Ventilation chamber Slope 5. 66% Slope 5. 66% Service gallery Junction chamber Junction chamber Target Chamber Target Chamber Proto Proto n beam line n beam line Access galleries PULSE TRANSFORMER November 2003 CERN - S. Rangod/ EP 3

TCC4 Handling equipment • TCC4 gallery is equipped wit h a radiat ion hard underslung crane. The very limited space and saf ety aspects make the crane quite complicated. • Main parameters: – Maxi working load of t he main hoist : 7.5 T corresponding t o t he weight of t he heaviest CERN shielding blocks – Maxi working load of t he auxiliary hoist : 5 T – Theoret ical posit ioning precision: +/ - 2.5 mm – Slope: 5.66 % (ident ical t o t he beam slope and TCC4 f loor) – St ainless st eel rails and racks – One video camera f ixed on t he main hoist chariot November 2003 CERN - S. Rangod/ EP 4

Area covered by the main hoist (cross sect ion) 3400 Area covered by the main hoist Area covered by 1800 1950 the auxiliary hoist 1000 Shield 4525 3600 2800 1600 Horn outer conductor 3000 Approach distances of Main hoist Limit distances of the main hoist November 2003 CERN - S. Rangod/ EP 5

Lif ting beam proposal 45 55 R205 All pawls will be removed later (after handling tests and first installation) 15 250 S p e c i f i c h o o k s w i t h a d j u s t a b l e p o s i t i o n ( s h a p e n o t y e t d e t e r m i n e d ) Ø30 S l o p e : 5 . 6 6 % 232 388 Working Load WL 3750 Kg 7500 Kg 10 1 1 x 5 0 ( p i t c h ) 9 2 0 ( m i n i ) WL 3750 Kg 260 The central rotating 2 0 2 0 r ( m a x i ) o o double hook can be l f 2 7 0 0 b e t w e e blocked each 90° n e x 4 t r e m i t y h o o k s C C T o t a l l e n g t h T : 3 0 0 0 m a x i e h t o t 0 0 6 Extremity hooks used f or the horn handling 3 November 2003 CERN - S. Rangod/ EP 6

CNGS Horn – general assembly St irrups f ixed t o t he base f rame of t he horn Court esy 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 2 November 2003 CERN - S. Rangod/ EP 8

Horn removal procedure (Disconnect ion of t he Fast Coupling Syst em) Shielding wall Passageway Court esy S. Wallon/ LAL November 2003 CERN - S. Rangod/ EP 9

Horn removal procedure (Disconnect ion of t he Fast Coupling Syst em) Opening f or access to the nuts of the Fast Coupling System Shielding wall Passageway Court esy S. Wallon/ LAL November 2003 CERN - S. Rangod/ EP 10

Horn removing sequences (Top view) Fast Coupling System I ron collimator Target Trench HORN BEAM Stripline 1 Side wall shielding Link section Passageway Sequence 1 Stripline 2 Through t he side wall, unscrew t he 5 nut s (M16) on t he Fast Coupling Syst em t o release t he horn f rom t he st ripline part 1 Stripline 3 November 2003 CERN - S. Rangod/ EP 11

Horn removing sequences (Top view) Fast Coupling System I ron collimator Target Trench HORN BEAM Stripline 1 Side wall shielding Link section Passageway Sequence 2 Stripline 2 Manually remove t he link sect ion locat ed in t he t rench Disconnect t he cooling wat er f lexible t ube Stripline 3 November 2003 CERN - S. Rangod/ EP 12

Horn removing sequences (Top view) Fast Coupling System I ron collimator Target Trench HORN BEAM Stripline 1 Side wall shielding Passageway Sequence 2 Stripline 2 Manually remove t he elect rical link locat ed in t he t rench Disconnect t he cooling wat er f lexible t ube Stripline 3 November 2003 CERN - S. Rangod/ EP 13

Horn removing sequences (Top view) Fast Coupling System I ron collimator Target Trench HORN BEAM Stripline 1 Side wall shielding Passageway Sequence 3 Stripline 2 From t he passageway, slide st ripline 1 downst ream By 100 mm Stripline 3 November 2003 CERN - S. Rangod/ EP 14

Horn removing sequences (Top view) Fast Coupling System I ron collimator Target Trench HORN BEAM Stripline 1 Side wall shielding 100 mm Passageway Sequence 3 Stripline 2 From t he passageway, slide st ripline 1 downst ream By 100 mm Stripline 3 November 2003 CERN - S. Rangod/ EP 15

Horn removing sequences (Art ist view) Court esy: LAL/ Orsay Fast Coupling System BEAM Stripline Part 1 Stripline Part 3 Stripline Part 2 Link section November 2003 CERN - S. Rangod/ EP 16

Horn removing sequences (Cross sect ion) Sequence 4 Wit h t he crane, remove t he iron blocks of t he t op shield (aut omat ic clamping syst em) Marble I ro n Concrete Access galleryTSG43 Stripline 1 Stripline 3 Passageway Stripline 2 Fast Coupling System Trench Link sections November 2003 CERN - S. Rangod/ EP 17

Horn removing sequences (Cross sect ion) Sequence 4 Wit h t he crane, remove t he iron blocks of t he t op shield (aut omat ic clamping syst em) Marble Concrete Access galleryTSG43 Stripline 1 Stripline 3 Passageway Stripline 2 Fast Coupling System Trench Link sections November 2003 CERN - S. Rangod/ EP 18

Horn removing sequences (Cross sect ion) Sequence 5 Wit h t he crane, remove t he t op blocks of t he side shielding wall and t hose in f ront of t he Fast Coupling Syst em Marble Concrete Access galleryTSG43 Stripline 1 Stripline 3 Passageway Stripline 2 Fast Coupling System Trench Link sections November 2003 CERN - S. Rangod/ EP 19

Horn removing sequences (Cross sect ion) Sequence 5 Wit h t he crane, remove t he t op blocks of t he side shielding wall and t hose in f ront of t he Fast Coupling Syst em Marble Concrete Access galleryTSG43 Stripline 1 Stripline 3 Passageway Stripline 2 Fast Coupling System Trench Link sections November 2003 CERN - S. Rangod/ EP 20

Horn removing sequences (Cross sect ion) Sequence 6 The horn is t hen t ransport ed upst ream, wit h t he crane t o t he j unct ion chamber Marble Concrete Access galleryTSG43 Stripline 1 Stripline 3 Passageway Stripline 2 Fast Coupling System Trench Link sections November 2003 CERN - S. Rangod/ EP 21

Horn removing sequences (Cross sect ion) Sequence 6 The horn is t hen t ransport ed upst ream, wit h t he crane t o t he j unct ion chamber Marble Concrete Access galleryTSG43 Stripline 1 Stripline 3 Passageway Stripline 2 Trench Link sections November 2003 CERN - S. Rangod/ EP 22

Horn removing sequences (Cross sect ion) Sequence 6 The horn is t hen t ransport ed upst ream, wit h t he crane t o t he j unct ion chamber Marble Concrete Access galleryTSG43 Stripline 1 Stripline 3 Passageway Stripline 2 Trench Link sections November 2003 CERN - S. Rangod/ EP 23

Horn removing sequences I ro n Lif ting beam device Junction By hand adjustable part chamber (SL1) extension Horn base f rame Trailer Guiding rail Sequence 7 Lower t he horn ont o a mot orized t r ailer* in t he j unct ion chamber * Under development November 2003 CERN - S. Rangod/ EP 24

Transport of the horn ( f rom t he t arget chamber t o t he st orage gallery) Guiding rail embedded in the concrete A c c e s s g a l l e r y Shielding blocks Service gallery Ventilation Chamber Storage chamber Junction chamber S l o p e 2 % 20 m 15 m Hook limit s Proton beam tunnel Slope 5.6% Target chamber November 2003 CERN - S. Rangod/ EP 25

Horn exchange installation sequences 1- The spare horn is brought t o t he j unct ion chamber, picked up by t he crane and inst alled on t he adj ust able f eet (posit ioning t olerance: r = 50 mm) 2- The horn alignment can be checked, if necessary, at t his st age. Bot h horns are supposed t o be ident ical t o +/ - 0.5 mm t olerances. 3- The shielding is re-inst alled, except f or t he block(s) in f ront t he FCS. 4- From t he passageway, slide st ripline 1 upst ream by 100 mm and f ine adj ust t o t he exact posit ion of t he horn. 5- The f ive nut s of t he FCS are t ight ened. 6- The shielding blocks are placed in posit ion in f ront of t he FCS . 7- I n t he t rench, out side t he shielding t he link sect ion is reinst alled . 8- The cooling wat er f lexible t ube is re-connect ed November 2003 CERN - S. Rangod/ EP 26