 Wednesday, January 18, 2017, 11:53, Isaac Earle, North Hot-Cell, Development, , , NHC partition wall installation complete 
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The final panels of the partition wall were installed today as per drawing IRH1609. Sealing, finishing, and painting of the NHC walls and
floor can now commence.
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Tuesday, February 07, 2017, 15:57, Isaac Earle, North Hot-Cell, Development, , , Ventilation Ducting Gasket Installed
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| Lead gasket IRH1633 was installed today according to assembly drawing IRH1618 Rev B. |
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Thursday, February 09, 2017, 14:07, Isaac Earle, North Hot-Cell, Development, , , North Hot Cell Shielding Window Gaskets Changed 23x
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The North Hot Cell shielding window gaskets have been changed and the window has been filled with new oil. Although there was no noticeable
oil leaks before starting the job, the gaskets had not been changed since initial installation approximately 15 years ago, so they were done now as part
of construction of the new cell. The work took place between January 26 – Feb 8, 2017 following the attached PDF “Full procedure |
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Friday, February 24, 2017, 15:12, Isaac Earle, North Hot-Cell, Development, , , NHC interior walls/floor/ceiling re-finished, sealed, and painted 8x
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The North Hot Cell interior walls, floor, and ceiling were re-finished, sealed, and painted by Omni Coating from Feb 6 - 17 under PO #3036471. This
job required 2-3 people for 4-6 hours per day over the 2 week period. First the existing surfaces were ground and/or sanded to remove existing coatings
and protrusions/sharp edges. This was followed by a coat of primer to highlight uneven surfaces and improve adhesion of following fillers and coatings. |
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Tuesday, February 28, 2017, 17:51, Isaac Earle, North Hot-Cell, Development, , , NHC flanged ducting connection sealed
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The North Hot Cell ducting (IRH1617) has been sealed with a bead of Sikaflex 1a polyurethane construction sealant where the flanged connection
bolts to the NHC/TCS partition wall. When this sealant shows signs of aging it may be cut away and re-applied without unbolting the flange.
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Thursday, March 02, 2017, 15:02, Isaac Earle, North Hot-Cell, Development, , , NHC roughing filter installed
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The roughing filter assembly (RFM0001D) has been installed at the ventilation exhaust hole on the NHC partition wall. The filter used is
Model # 332-528-002 supplied by BGE Service & Supply Ltd (see PO # TR123998). Installation and removal of the filter using the manipulators will
be tested after they have been installed. |
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Thursday, April 27, 2017, 16:58, Isaac Earle, North Hot-Cell, Development, , , Right side NHC manipulator installed
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Installation of the NHC right side manipulator was completed yesterday. The three piece manipulator was assembled in the module assembly
area on the manipulator cart which was then craned through the hatch to the NHC service area (the slave end had to be removed for it to fit through the
hatch). The installation went relatively smoothly except for the second (cold side) piece of lead shielding around the thru tube which would not |
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Tuesday, May 02, 2017, 09:48, Isaac Earle, North Hot-Cell, Development, , , NHC polycarbonate window cover panel installed
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The window cover panel has been installed on the hot side of the NHC shielding window according to drawing IRH1638. It was necessary to drill
and tap a hole in the steel frame first to achieve proper grounding for stud welding. The strength of all studs were checked by installing a nut
on the stud tightened against a block up against the steel frame, which was then torqued to a minimum of 10 ft*lbs. For the final installation the |
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Thursday, May 11, 2017, 16:10, Isaac Earle, North Hot-Cell, Development, , , NHC roof block to TH north wall gap sealed
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The gap between the north face of the NHC roof block and the target hall north wall in the area where the NHC inlet ducting will be installed has
been sealed with Sikaflex 1a flexible polyurethane sealant applied over foam backer-rod. |
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Friday, June 09, 2017, 11:21, chad fisher, North Hot-Cell, Maintenance, , , Model 'N' Slave Removal Through Roof
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Isaac and Chad disengaged the slave end of the manipulator and performed a slave removal through the slave removal roof hatch. This is part of investigation
into a 'Z' motion tape that is "rubbing" on its drum on the master side of the manipulator during manual 'Z' retraction of 'Z' extension.
This also was the first test of the concept of removing the manipulator slave through the manipulator hatch that was built into the roof. |
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Thursday, June 15, 2017, 11:29, Isaac Earle, North Hot-Cell, Development, , , NHC inlet ducting installed
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The North Hot Cell inlet ducting assembly was installed today in the target hall at the north end of the NHC roof block. A small section of the
perforated aluminum sheet on the TCS cage had to be trimmed for the assembly to fit (see IMG_0214). At each end of the assembly it was fastened to
the roof structure using a 1/4"-20 tapped hole in the steel roof, and a 1/4"-20 anchor in the north wall of the target hall. The base flange |
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Friday, June 23, 2017, 17:28, Isaac Earle, North Hot-Cell, Development, , , NHC module flange and cameras installed
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The North Hot Cell module support flange (IRH1152D) was installed on June 21, 2017 using 1/8" rubber sheet as a sealing gasket. The
rubber was glued at the seams with Loctite 495 instant adhesive. Cameras with all required wiring and connectors were installed on the mounting bars
(IGN0325D) and then aligned to provide the same view as at other module installation locations in the target hall. A cable with 5 video signals, |
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Wednesday, July 05, 2017, 15:36, Isaac Earle, North Hot-Cell, Development, , , NHC and SHC nuclear ventilation flow sensors installed
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Installation of new flow sensors and transmitters for the NHC and SHC duct lines was completed in the target hall today. The sensors are
Dwyer DS-300-8 in-line sensors for 8" pipe; The transmitters are Dwyer MS0121 magnesense differential transmitters with 4-20mA output. The transmitters
will be wired to the new PLC control system when the upgrade is done. |
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Thursday, July 06, 2017, 14:23, Isaac Earle, North Hot-Cell, Repair, , , Slave side Z motion tape snapped on NHC right side manipulator
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The NHC right side manipulator was evaluated today to check if operation was normal through all ranges of motion. The manipulator was first moved
through usual motions without the electric motion drives: the feel was fairly normal, a sound could be heard from the master side Z motion tapes rubbing
on the sides of the pulleys, this problem had been identified a few weeks ago however it was significantly reduced since the master side upper and lower |
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Monday, July 10, 2017, 09:09, Dan McDonald, North Hot-Cell, Repair, , , manipulator cart repair
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A hydraulic leak was found on the manipulator install and repair cart, upon further investigation the cause was a faulty cylinder. Once the
cylinder was removed and disassembled the inner bore was found to be scored beyond repair. Another point of interest was that the rod was painted to the
point that when retracted it compromised the rod seal causing the cylinder to leak. attached are photos outlining the issues. new cylinders are being sourced |
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Wednesday, August 09, 2017, 16:39, Isaac Earle, North Hot-Cell, Development, , , NHC drain line into sump identified
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The NHC drain line was tested by pouring approximately 10 gallons of water through the drain grate at the base of the NHC partition wall. Water
was seen a few minutes later pouring into the sump labeled "ACTIVE SUMP" from the light coloured pipe on the west side of the inside of the sump.
Rob Walker had previously said that the hot cells drain into the sump next to this one which is labeled "SANITARY SUMP", which appears |
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Tuesday, August 15, 2017, 12:10, Isaac Earle, North Hot-Cell, Development, , , ISAC Active Sump low water level measured
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The ISAC active sump in the Active Service Room (#002 on B2 level) was pumped out yesterday using the standard procedure (Section 5.5.2 of the ISAC Operators'
Manual, V1.0). The procedure makes use of the auto stop feature of the pump-out system which stops when a low level float switch is triggered. The
water level was measured after pumping stopped, and was found to be approximately 21" above the base of the sump. A new section of pipe will |
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Thursday, August 17, 2017, 14:38, Isaac Earle, North Hot-Cell, Development, , , 4/6 NHC roof blocks installed 7x
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Roof blocks IRH1641, IRH1642, IRH1643, and IRH1644 have been fully assembled, labeled, and installed as per drawing IRH1652. Fabrication
of TCS shield block (IRH1646) and NHC module port block (IRH1645) is still in progress.
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Friday, October 06, 2017, 11:12, Isaac Earle, North Hot-Cell, Development, , , NHC module port shield block and TCS vessel shield block installed
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The NHC module port shield block (IRH1645) and the TCS vessel shield block (IRH1646) were installed yesterday in the target hall according to assembly
drawing IRH1652. No issues were encountered during installation. Vacuum was pulled on the TCS and a leak check was performed on the shield:
no leaks found. |
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Friday, October 06, 2017, 11:21, Isaac Earle, North Hot-Cell, Development, , , ISAC-1 active sump drain pipe modified
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The 4" PVC drain line in the ISAC-1 active sump was modified so that the drain pipe terminates below the low level water line of the automatic pump-out
system. This will prevent backflow of sump gasses into the SHC, NHC, or TCS space if the air pressure in any of those rooms are lower than the sump
air pressure. The details of the modification were specified by Mechanical Services Group, and the work was done by Paul Jensen. This system |
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