The old TM#2 source tray and TM#4 optics tray have been removed from the vault and placed into the spent target storage on tray 9 which is meant for source trays.

Transfer fixture has been remotely disassembled to the point where the ball nut lock plate assembly can be inserted into the tool port and the plate replaced by hand in the tool port without having to enter the hot cell. Straight head screws will be replaced with SHCS to facilitate easier re-assembly and future disassembly.

Repair of the tray transfer fixture is complete (minus testing).

A distorted ball nut lock plate was replaced and thread loc added. to the ball nut/plate assembly. Testing will take place tomorrow once the thread lock has a chance to cure.

 Last week drilling of the additional required holes in the SMP shield box was completed in the Target Hall.  This morning the shield box (IRH1675) was moved to its final installation position in the silo area on the B2 level.  The vacuum vessel (IRH1806) was then installed inside the shield box.  The center of the vacuum vessel is 2-3" north of the south travel limit of the crane.  Photos as well as measurements of the final position are attached below.

With the SMP vacuum vessel now installed inside the shield box, a test was performed to measure the torque required to rotate the vessel.  At a moment arm distance of 2.0m a force of 89N was required to rotate the vessel (with no module installed) resulting in a torque of 178Nm.  Based on this, the coefficient of rolling resistance (CRR) was calculated to be 0.007;  This is fairly close to available data for similar applications such as cast iron wheels on steel rail (https://en.wikipedia.org/wiki/Rolling_resistance).  The CRR used for design of the SMP drivetrain was 0.054 which was based on empirical data for a similar product.  Because this is significantly higher than the friction of the as-built system the drive-train components are stronger than required and should have no problem rotating the vessel when loaded with a module.

Further details and calculations included in the attached PDF.

• Drop test performed January 8, 2019 with 25 lb target, UN pail and lug cover. Drop failed. Lug cover half removed. Pictures and video in docushare collection 24626.
• Second test January8, 2019 UN pail, "new" dish cover, old lock lever ring, 25 lb target. Single drop from 1.2m onto latch, no sealant. No leaks 24 hours later. Pictures in docushare collection 24626

• Drop test performed April 2, 2019 repeat of previous test using until that was loaded in north hot cell test. Target punctured can. Pictures in docushare collection 24626.

• Drop test performed April 5, 2019 repeat of previous test with the addition of a aluminum sleeve (0.05" thick) inside the pail between pail and target.

New UN rated pail with 9.55 kg target, 1.2 kg 16 gauge Al sleeve (10.75 OD x 14.75" tall), 3 liters of water with red food coloring no sealant on gasket.

First drop standard drop test from 1.2m onto latch

Second drop test 1.2m onto bottom of pail

Third drop 1.2m onto side of pail

Drops 4-6 1.2m onto lid

Pail was left inverted for an hour after the first three drops with no leaks after 1 hour.

No leaks after the remaining 3 drops .Bottom very damaged suggesting need for protective disc in bottom of pail.

Pictures can be found in docushare Collection-24627

• Drop tests performed May 2, 2019 with 9.7 kg target, 1.346 kg of mixed module and target components, sleeve and disc. First drop on latch from 1.2m, no leak, second drop straight on bottom from 1.2m, no leak, third drop on side from 1.2m leak. Drop test described in more detail in document drop test witness document on docushare. Pictures and video in docushare collection 24626.

Pail transfer was undertaken in the south hot cell. went very well except near the end the master tong cable of the right hand manipulator broke. Not entirely a surprise due to the amount of use it has seen lately.

Broken handle cable of east manipulator has been replaced and manipulator is operational again.

 Targets Ta#50 and SiC#34 have been transferred from their old pails to new ones. Ta#50 was done on April 12th 2019 it was moved from pail #148 to pail #200 and a new field measurement was done and found to be 3.57mSv/hr. SiC#34 was done on April 18th 2019 it was moved from pail #143 to pail # 206 and a new field measurement was done and found to be 2.20mSv/hr. Both measurements were done by the RAM that is mounted at the south hot cell.

April 24 2019

Target Ta#46 has now been transferred to a new pail with a number 207 from pail 143 it was 3.62 mSv/hr when removed from the south hot cell.

April 25 2019

Target Ta#47 has now been transferred to a new pail with a number 201 from pail 137 it was 2.25mSv/hr when removed from the south hot cell. The bag that the target was in has shown signs of degradation.

Target Ta#45 has now been transferred to a new pail with a number 202 from pail 124 it was 1.45mSv/hr when removed from the south hot cell. The bag that the target was in was destroyed. Also in the pail was a shutter, IMG Gauge, some altem parts, wire and bolts.

The extraction electrode from Ta#47 was added to this pail as it was left behind from last transfer.

Two pail transfers took place April 25th.

Ta#47 transfered from pail 137 to pail 201. existing plastic bag from 137 showed many areas of typical age/rad damage related failure.

Ta#45 in pail 124 was transfered to pail 202. Pail 124 also contained the shutter and "roof mounted" img gauge from TM2 that were removed in 2015 in addition to a bunch of fasteners, heat shrink tubing (from lock lever rings from an previous methods of spent target packaging) etc. The original plastic bag in pail 124 had completely failed and shredded and flaky. The shutter and extraction electrode from Ta#47 were put in pail 202 with Ta#45...cabling of the shutter being completely intertwined with the target.

 The following targets have been moved from the spent target vault to the mini vault:

#127 - SiC#31 (front)

#132 - SiC#32 

#145 - UC#19

#150 - UC#20

#159 - UC#21 (back) 

 The spent UC#26 target was moved from the south hot cell to the spent target vault. It was place in pail #209 and put in spot 1A in the vault and was 2.42mSv/hr upon removal from the south hot cell.

 The entrance module has been moved from the west station to the south hot cell.

West entrance module - visible broken or disconnected wire visible on old/existing wire scanner. Wire scanner removed, new one installed.

 The West Entrance module has been moved from the south hot cell to the west target station.

Entrance module has been connected back to ITW. Everything is normal.

The SMP module support flange sub-assembly (IRH1755) was installed today according to drawing IRH1683.  Dow Corning 111 sealing compound was used to keep the o-ring adhered to the lower groove during transportation and installation.  The TCS shield plug (IRH1646) was then installed on the SMP module flange which has vacuum connections for leak checking.  Vacuum was pulled on the SMP vessel using the Varian 979 leak detector.  After approximately 3.5 hours of pumping the test port pressure was at 2.4E-2 Torr and leak rate was 7.9E-8atm*cc/s.  Helium was configured with the regulator set at 10psi and flow rate of >10 bubbles per second in Windex and then applied slowly around the perimeter of the vacuum flange (IRH1686) and it's mating components on both  the top and the bottom.  There was no response on the leak detector indicating the seals on both sides of the module flange are leak tight.

The following controls-related items were installed for the SMP project:

- Cable tray

- Main control panel

- Motor starter box

- Wiring from limit switches and rotation motor to main control panel

- Air fittings at supply (quick disconnect)

- Main air supply hose from supply to control panel (quick disconnect)

- Air tubing from lid control valve at control panel to lid cylinders

Air fittings stem off existing air supply lines on the South wall, below a manual shutoff valve. A quick disconnect was installed. When SMP is not in use, manual shutoff valve should be left off.

Main control panel and motor starter box were mounted on the North wall. Wire duct runs from the main control panel to the grated floor. Cabling/air runs underneath the mezzanine platform, along existing and new cable tray, to the SMP.

Cable tray was installed on the South wall, from the corner to the SMP module. A cutout was made to accommodate for existing tubing. An additional ~1 ft. of tray will be added to the end, near the corner, at a future time.

Remainder of installation work to be done before commissioning:

- Mount and install new Opto-22 module
- Chain new Opto-22 module to existing one (power, comms) below mezzanine on North wall

 A 55 Gal. drum was remotely lowered into the south hot cell. It was then filled with compressable waste. Then the drum was remotely removed from the south hot cell. The drum measured about 20microSv/hr upon removal from the south hot cell.

 The old TM#4 source tray in the south hot cell was moved to the spent target vault. The tray had a low of 7.5mSv/hr to a high of 22.1mSv/hr though a 390 degree rotation.