TRT Leak Repair

Anatoli Romaniouk, 05.06.2013 1

EC leak tests

Side C

Side A

2

3

EC wheel type A connectivity

Electronics

Gas manifold

Gas

Straws/radiator

Electronics

Gas manifold

Gas

Straws/radiator

Gas IN

Gas OUTPEEK pipes shown in pink

Places of stress

Repair at the detector level

NutPEEK pipe

Most probable places of leaks

Insert

Steel pipe

Polyurethane joint

Connector

Removable steel road

5

Repair status

TRT Wheel Repair and tests CommentsA1 Done, failed

A2 Done, OK Leak fixed

A3 Done, OK Leak fixed

A4 Done, failed Large, Repair is OK but leak in the other place

A5 Done, OK No leak before

A6 Done, partially failed Leak reduced but still large. Repair is OK but there is still leak in the other place

B1 Done, OK No leak before

B2 Done OK No leak before

B3 Done, failed Leak still at the level of 2.5 l/h (can be controlled)

B4 Done OK Leak was small, now no remarkable leak

B5 Done, failed Leak still at the level of 0.25 l/h (can be controlled)

B6 Done, OK

B7 Done, OK

B8 Done, OK

6

Side A.

B3 OUTF 16

1155 mmCh. 9

NO Leak

B4 OUTF 18

1033 mmCh. 10

No Leak

B5 OUTF 20

910 mmCh. 11

Leak 9 l/hB6 OUTF 22

788 mmCh. 12

No Leak

B7 OUTF 24

665 mmCh. 13

No Leak

B8 OUTF 26

543 mmCh. 14

No Leak

A1 OUTF 28

2388 mmCh. 1

NO Leak

A2 OUTF 1

2099 mmCh. 2

NO Leak

A3 OUTF 3

1963 mmCh. 3

Leak 0.06 l/h

A4 OUTF 5

1814 mmCh. 4

Leak 0.8 l/h

A5 OUTF 7

1673 mmCh. 5

Leak 0.3 l/h

A6 OUTF 9

1526 mmCh. 6

Leak 4 l/h

B1 OUTF 11

1400 mmCh. 7

Leak 75 l/h

B2 OUTF 131278 mmCh. 8

No Leak

7

Side A: different design for connectors on the detector (has been assembled after lessons from side C)

Close to the detector pipes are glued to the plastic connector.That was the reason why the leaks on side A appeared later than on side C.

8

But still there are places with stress

It might be crack in the pipe(most likely just a defect)

9

The bigest problem the bracket regions

Cracks in the pipes

10

Now environment inside of the pipe is the same but technique should be adopted to this design.

There are 4 tubes which have larger wall thickness -> even endoscope cannot go inside.

Preventive repair: isolate bracket region from ozone installing 3 mm pipe deep behind of brackets.

11

Next steps (side A):

•3 lines repaired.

•7 more will be repaired today

•Repair of the remaining 4 with smaller inner diameter will be tested tomorrow. Hopefully will be repaired in Fr.

•Leak tests will continue may be Mo.-Tu.

•On We. - Th. we will look for faulty connections at PPF1

•Th.-Fr. Close side A.