26 November 2007D.LACARRERE1 UX85 B – COOLING PIPES (Mixed & Chilled Water) Radiography (Se75) - Localization 29 welds to be inspected

26 November 2007D.LACARRERE2 Localization of welds to be inspected (2 nd campaign – Nov.2007) UX85 B

26 November 2007D.LACARRERE3 Mixed water cooling pipelines DN200 – Identification of the welds Supply pipeline : C1,C2,C3,C4,C5,C6 - Return pipeline : D1,D2,D3,D4,D5,D6 Remarks : C2 = SK01 S02 & D6 = SK04 S06 (CRIOTEC identification + checked by NDE). Chilled water cooling pipelines DN80 – Identification of the welds Supply pipeline : a1,a2,a3,a4,a5,a6 – Return pipeline : b1,b2,b3,b4,b5,b6 Remarks : a1 = SK07 S06, a2 = SK07 S07 & a3 = SK07 S08 (CRIOTEC identification + checked by NDE) Compressed air pipelines DN40 – Identification of the welds Supply pipeline : u1,u2,u3,u4,u5 Remarks : u1 = SK15 S04 (CRIOTEC identification + checked by NDE CAPTIONS X X X X RETURN SUPPLY a1 a2 a3 a5 a6 b1 b2 b3b4 b5 b6 C1 C2 C3 C4 C5 D1D2 D3 D4 D5 D6 MANUAL VALVES C6 U1 U3 U2 U5 U4 UX85 B a4 Schematic view – Welds to be inspected (2 nd campaign – Nov.2007)

26 November 2007D.LACARRERE4 RECAP (2 nd campaign – Nov.2007) - Non-destructive inspections : QUALITECH SA HALLAWEG 3 POSTFACH 236 CH-3136 DUDINGEN - Inspection means : Gamma-radiography - Se75 (no 4243RP) - Dates of intervention : 29 Nov. 07 night (21:00 until 4:00) – 30 Nov. night (as reserve) - Welds to be inspected & priorities as follows : PRIORITY 1 A - MIXED WATER PIPELINES DN200 Supply line : C1, C2, C3, C4, C5, C6 = 6 welds Return line : D1, D2, D3, D4, D5, D6 = 6 welds Remarks : C2 = SK01 S02 & D6 = SK04 S06 (CRIOTEC identification & checked by NDE). B - CHILLED WATER PIPELINES DN80 Supply line : a1,a2,a3,a4,a5,a6 = 6 welds Return line : b1,b2,b3,b4,b5,b6 = 6 welds Remarks : a1 = SK07 S06, a2 = SK07 S07, a3 = SK07 S08 (CRIOTEC identifi. & checked by NDE) PRIORITY 2 C - COMPRESSED AIR PIPELINE DN40 Supply pipeline : u1,u2,u3,u4,u5 = 5 welds Remarks : u1 = SK15 S04 (CRIOTEC identification & checked by NDE) TOTAL

26 November 2007D.LACARRERE5 PROPOSITION du 4/12 *- SEMAINE 49; Qualification des soudeurs DN 200 *- SEMAINE 50; Achat du matériel suite aux résultats de qualification *- SEMAINES 50 and 51; préfabrication (première partie (jusqu’au mur) *- SEMAINE 1 (3/4/5 janvier); démontage des tubes DN200 *- SEMAINE 2 (7 & 8 janvier); DN80 réparations *- SEMAINE 2 (9 to 12 janvier); DN200 installation *- SEMAINE 2 (11 janvier); tests radiographiques *- SEMAINE 2 ; DN 200 préfabrication seconde partie après le mur) *- SEMAINE 3; démontage des tuyauteries DN200 Réparations des tuyauteries DN 80 installation des tuyauteries DN200 *- SEMAINE 3 (19 janvier). tests radiographiques. La firme peut travailler de 7h a 21 samedi compris Les tests radiographiques seront faits par Qualitech. Tests a 100 % des parties reconstruites. Les CERN installera une plateforme en amont du mur pour le démontage et la pose des tubes La manutention sera faite par l’équipe du transport Confirmation écrite de Cryotech le 5/12/2007.