Barrel TRT Straw Leak Test

K. McFarlane

Hampton UniversityDOE/NSF Review, BNL March 2001

04/19/23BNL0103Straw

K. McFarlaneBNL, 20-Mar to 22-Mar, 2001

2

Straw Leak Test Status

• Running now with 2-straw partially automated system

• Can reliably get 125 straws/day (target)

• New 4-straw system is under construction (in use April 2001)

• Automation of additional steps is being developed

• Basic leak test technology is unchanged.

04/19/23BNL0103Straw

K. McFarlaneBNL, 20-Mar to 22-Mar, 2001

3

Leak Test Station

04/19/23BNL0103Straw

K. McFarlaneBNL, 20-Mar to 22-Mar, 2001

4

Leak Test ‘Head’

04/19/23BNL0103Straw

K. McFarlaneBNL, 20-Mar to 22-Mar, 2001

5

Straw Leak Test Criterion

• Straw is re-tested if leak rate exceeds 0.020” water in 20 s (0.7 mbar/bar/min; cf. TDR specification of 0.1 mbar/bar/min)

• Straw that fails three times is rejected.

• Typical re-test results are: 0.004, 0.001, 0.010, 0.002”.

• Leak rate is usually a function of our machine. We do not plan to change.

04/19/23BNL0103Straw

K. McFarlaneBNL, 20-Mar to 22-Mar, 2001

6

Leak Test Partial Automation

Partial automation – BridgeView front panel

04/19/23BNL0103Straw

K. McFarlaneBNL, 20-Mar to 22-Mar, 2001

7

Database Entry

04/19/23BNL0103Straw

K. McFarlaneBNL, 20-Mar to 22-Mar, 2001

8

New Leak Test ‘Head’

04/19/23BNL0103Straw

K. McFarlaneBNL, 20-Mar to 22-Mar, 2001

9

Conclusions

• Leak check criterion is satisfactory; upgrade of equipment will proceed on the basis that existing basic method works

• Production rate now adequate; expected to increase, releasing technician time for other work.