ITH: MP1 has been replaced due to its poor performance.  Its motor and power cable are taken out and reused on new pump. Vacuum group assembled them together, and installed the new pump. The new pump works fine.

 The spent target in the south hot cell has been moved to the spent target vault. It was placed in pail 204 and placed in spot 6B. The pail is made of thicker steel and thus will not need to be repackaged later.  The ISAC spent target vault is full there is no more room for any more targets.

SMP drivetrain design work is currently underway.  Alejandro has selected a suitable 1200:1 reducer which will give a vessel rotation speed of 0.21rpm with a 1725rpm motor (deemed sufficiently close to the SHC rotation speed of 0.17rpm).  The reducer however is only rated for 0.33hp, and Allon's analysis recommended we use a motor of at least 0.4hp

The following NHC development work was completed under WP I2019-01-09-4:

• Location of RH feature on operator level LED lighting updated to match IRH1800 Rev B design
• Remote Handling test of the LED fixtures was repeated using a 9' pole with hook attachment through the manipulator slave hatch from the Target Hall: both LED fixtures were removed and reinstalled successfully with relative ease
• Tool port seal replaced to address an audible air leak: the 1/4" foam seal was removed and replaced with adhesive backed 5/8" wide hollow foam rubber seal (McMaster Carr PN: 93085K81). Prior to the change DPG4 was at 0.63"wc, after the change wit was 0.73"wc with all system variables constant.
• NHC manipulator access block seal was replaced, likewise to address an audible air leak: the 1/4" foam seal was removed and replaced with adhesive backed 1/2" thick BunA-N rubber strip (McMaster Carr PN: 9023K85).  DPG4 was at 0.94"wc prior to the change, and 1.07"wc after with all system variables constant

 The NHC right side monitor has been wired to display the signal from the in-cell camera.  This was tested using a snake camera on both of the CPC-4 connectors.

3 damaged 24VDC plugs of TP solenoid valves are replaced. Inspected other plugs. All of them are in good condition now.

 Franco Mammarella was consulted regarding electrical grounding of the NHC design (RS103 of Document-131915).  After discussing the design, and having grounding inspected by Randy Boehm, Franco approved the design and advised that the grounding system should be inspected periodically.  This task has been added to the Remote Handling inspection index on an annual schedule.  A PDF copy of the e-mail correspondence with Franco is attached.

  On February 8th the SMP shield box (IRH1675) and the vacuum vessel (IRH1806) were both raised from a horizontal to vertical orientation in the ISAC-1 Experimental Hall.  Hamilton "Mini-Mite" S-MM2-43FS caster wheels were then installed on the base of the shield box and it was lowered down the hatch to the B2 level.  The vacuum vessel was then lowered into the shield box, supported by the rollers, as designed.  The shield box and vessel combination were then moved south along the steel plated floor until positioned under the hatch leading to the Target Hall.  Movement along the floor was achieved by pushing the back of the vessel with an electric fork truck and pulling from the front with a cable winch attached to a plate mounted in the floor in the SHC service area, centered east/west between the Ante Room doors.  The fork truck alone was sufficient to move the assembly on the smooth section of the plates, but the winch was needed on the section paitned with textured grit.  The vacuum vessel was then lifted into the Target Hall and placed in a temporary storage location in the silo area.  The shield box was then lifted, casters removed, and then lifted up into the Target Hall.  It was a very tight fit with the tubing which has been installed on the SHC and NHC ducting for the new flow meters, but the move was completed without causing damage.  The shield box was placed on the B2 level in the Target Hall where some final tapped holes will be added on the exterior before moving to the final installation location.

Dragan Mitrovic, TRIUMF structural engineer, was consulted earlier this week regarding seismic requirements for the SMP assembly.  Installation location, overall dimensions, total weight, and the center of mass for assembly IRH1670 were provided to him by e-mail.  On Feb 20th he communicated verbally that he had analyzed the assembly for seismic loads, and concluded that this equipment does not require anchoring or any other form of seismic restraint.

Update (May 30, 2019): Confirmed with Dragan that the approach he used for analysis was that specified in the BC Building Code (both 2012 edition and updated 2018 edition).

 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)