 Friday, August 05, 2016, 14:13, Isaac Earle, North Hot-Cell, Development, , , Preparations for NHC Ventilation Test
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A hole was drilled in the NHC exhaust duct in the east end of the target hall above the hatch to the Ante Room. This will be used for measuring
NHC exhaust flow rate with a thermal anemometer. The hole was tapped and plugged with an NPT tap.
Flow was measured in the existing hole in the SHC exhaust duct in approximately the same location. Flow velocity was measured to be 1415 |
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Wednesday, August 10, 2016, 14:38, Isaac Earle, North Hot-Cell, Development, , , North Hot Cell Ventilation Test Results
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Testing was performed on August 9th on the ISAC nuclear ventilation system to determine if the existing ventilation system can achieve the required cell
depressions for both SHC and NHC under all expected configurations and if a proposed modification to the DDC control system can provide acceptable stability
and response time for the system. The proposed control system observes the lower of the SHC depression or the NHC depression + 10% (to avoid stability |
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Wednesday, September 07, 2016, 11:39, Isaac Earle, North Hot-Cell, Development, , , NHC North / South Wall Gap Measurements
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Measurements were taken today of the NHC north/south wall gap at the location where the NHC/TCS partition wall will be installed (43.375"
from the NHC west wall). A HILTI PD40 laser range meter was used for the measurements. They were taken at 10", 34", 62", 90",
118", and 142" from the floor which matches the top of each cross-beam. The results are below: |
Thursday, September 15, 2016, 11:05, Isaac Earle, North Hot-Cell, Development, , , NHC / SHC feedthrough panel removed 
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The sheet metal panel covering the NHC/SHC feedthrough port was removed today using a slide-hammer to pull out the concrete anchors (this oversized panel
would have interfered with the NHC partition wall). 50cpm was found on the inside of the panel, 100cpm on the NHC side lip of the feedthrough, and
350cpm on the face of the shielding bricks in the feedthrough. Various dimensional measurements of the feedthrough were taken which will be added |
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Tuesday, November 08, 2016, 14:04, Isaac Earle, North Hot-Cell, Development, , , Interference check with TCS turbo pump and proposed NHC duct routing
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David Wang and I accessed the NHC today to check if the proposed duct routing (IRH1618) will interfere with servicing or replacement of the TCS turbo
pump. A piece of plywood was placed in the future position of the NHC/TCS partition wall (IRH1609), and a ducting elbow was placed at the approximate
position of the nearest elbow to the turbo pump. |
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Friday, December 09, 2016, 14:58, Isaac Earle, North Hot-Cell, Development, , , NHC service area floor and top of roof block painted
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The concrete floor in the North Hot Cell service area and the top of the NHC roof block in the target hall have been painted with Macropoxy 646
oil based epoxy paint, colour Flint Grey. Two coats were used for the NHC roof, and one for the service area floor.
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Tuesday, January 17, 2017, 13:45, Isaac Earle, North Hot-Cell, Development, , , NHC ducting installed
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The new ducting section connecting the existing duct termination in the TCS space to the NHC partition wall has been installed by Smith Sheet Metal
contractors. The installation drawing is IRH1618. There was not enough clearance between the duct pipe and the TCS vessel to butt weld the
new ductwork as originally intended. Instead a flange was welded to the existing pipe and also to the new section and the two were bolted together. |
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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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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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