Yesterday (Apr 15):

1) Installed TB22265 on to M9 exit port at 18:48 with no vacuum and left over night. Done per 2013 installation procedure (1.5 turns of the preload nut, after pins are engaged and springs are at free length)

 - On this installation, the nuts (TB22264) and tool block (TB22263) were reused from the 2013 blanking plate. The blanking plate (TB22267), spring eyes, springs and washers were new parts. Reused parts were 900 uSv/h on contact and 50 uSv/h @ 1/2m.

 - Spring eye, spring eye washers and nuts had fitment issues due to manufacturing errors. No dry fitting of parts was performed before hand. Spring eye used was a new style single piece machined type.

 - Selected springs were used in this installation: East spring rate: 4762 lbs/in, West spring rate 4972 lbs/in. See attached spreadsheet for spring rate test details.

2) 2013 TB22265 (previous) blanking plate was discovered to have a stuck spring eye on the East side.

 - Spring eye would not rotate or slide freely when moved by hand. Upon removing the spring eye with a mallet, evidence of aluminum galling could be seen.

 - Pin diameters measured were .499, diameters on drawing were .497 -.002/+.0. Specified hole diameter on blanking plate is .500 +.001/-.0. These spring eyes were of the 2pc welded type.

 - Despite larger than drawing size, west spring eye could still slide freely. On east spring eye near the welded area filing marks could be seen near the galling. This area measured .4995 at one point.

- Suspect this manufacturing defect (a lump) caused the spring eye to bind and cause the indium knife to stop advancing.

Today (Apr 16):

1) Leak checked blank off after leaving clamped over night. Vacuum pumping started at 9:00, leak check began at 11:00. Appears to be leak tight. (leak check results attached)

- Spring eye gaps appear to be the same as the previous day.

2) Began tear down of bridge and shielding setup.

- Surveyed the following radioactive items for storage in RH lead flask:

- M9 B1 pin drive hold down bolt; 800 uSv/h on contact,  50uSv/h @ 0.5 m. no removable contamination.

- TB22265 2013 blank off; 3900 uSv/h on contact, 200 uSv/h @ 0.5 m. 3000 cpm, on gamma detector (44-2) and 1600 cpm contamination on RM-14.