DC cable reroutingComparison of 3 options

Goals• Remove cable trays above Splitter magnets• Exchange and re-route PVC insulated cables by

PVC-free ones

MDLV_240104

MDLV_240104

All the DC cables feeding the magnets upstream MDLV_240104 to be exchanged

Current state

• 2 cable trays: OD115 and OD 116• 32/34 DC cables must be exchanged in OD115• 14/32 DC cables must be exchanged in OD116

OD 115

OD 116

OD 115

OD 116

To be exchangedremaining

3 options

Cable junction

AB

COption Dose rate Extra length

A 100 uSv 0 m

B 15 uSv 40 m

C 1 uSv 130 m

MDLV_240104

MDLV_240104

Option A

OPTION B

DANS LA SECTION DE 8m, BIEN AVANT LES PREMIERS MOUVEMENTS D’ECHELLES

Option C: add one rack per cable tray in TA801

Il existe déjà 4 RAL ou la jonction est faite entre câbles contrôles venant du BA80 et allant en TCC2 ou TDC2.

Les câbles entrant et sortant passent à travers le caillebotis entre celui-ci et l’échelle supérieure

3 options: dose costOperation Duration (min) # people A B CDisconnect 1 cable 3 1 690 690 690

Cut 1 cable 3 1 230 34.5 2.3

Remove 10 m cable 10 2 3833 5367 6862

Install 10 m cable 30 2 11500 16100 20585

Reconnect 1 cable 15 1 3450 3450 3450

Make new cable junction 30 2

4600 690 46

TOTAL IN uSv 24303 26331 31635

• Cable trays modification not included• The best solution seems to be option A• Removing and pulling cables is time

consuming and hence highly dose costing