DOE 2000. - Waste Isolation Pilot Plant - U.S. Department of Energy

WIPP RH PSAR DOE/WIPP-03-3174 CHAPTER 4
Shield Plug Lift Fixtures
There are two shield plug lift fixtures, one for each size of shield plug. Both fixtures can be used with
the 15-ton bridge crane to remove their respective Hot Cell shield plug, or both shield plugs can be
removed at the same time using only the large shield plug lift fixture. The small shield plug lift fixture,
shown in Figure 4.2-14c, resembles a tripod. It is 9 ft (2.7 m) tall with a handling pintle at the top which
is engaged by a facility grapple. The legs are fabricated from 3 in schedule 40 pipe. Each leg has an
engagement pin which can engage lifting lugs, on a 13 in (33 cm) radius, on the small shield plug
removal adapter. A centering pin is provided near the bottom of the shield plug lift fixture to engage the
shield plug removal adapter and align the fixture with the removal adapter. The fixture is lifted by the
15-ton bridge crane with the facility grapple installed. The fixture is rotated by the rotating block to
allow it to engage the shield plug removal adaptor lifting lugs. The small shield plug lift fixture weighs
approximately 400 lbs (181.4 kg) and has the capacity to lift approximately 10,000 lbs (4535.9 kg).
The shield plug removal adapter is a fabricated steel fixture that is attached to the small shield plug with
three bolts through holes in its base plate. It has three arms, each with a lifting lug that can be engaged
by the small shield plug lift fixture. The center line of the lifting lugs are each on a 13 in (33 cm) radius.
The adapter has a height of 12 3/8 in (31.4 cm) and weighs approximately 160 lbs (72.5 kg).
The large shield plug lift fixture, similar in design to the small shield plug lift fixture, is 11 ft (3.4 m) tall
and its engagement pins have a 39 in (99 cm) radius. It is fabricated from 3 inch schedule 80 pipe to
accommodate a greater lift weight. Its three engagement pins are designed to engage the three lifting lugs
of the large shield plug removal adaptor. The large shield plug lift fixture weighs approximately 800 lbs
(362.8 kg) and has a lift capacity of 20,000 lbs (9071.8 kg).
10-160B Drum Carriage Lift Fixture
The drum carriage lift fixture is a pentapod with five legs and a centering guide post with a guide pin.
Each leg has an engagement pin which engages a lift lug, mounted on a lifting post, on the drum carriage.
The guide pin slides into the center of the drum carriage center stanchion. Figure 4.2-15a shows the
drum carriage lift fixture and a fully loaded (five 55-gallon drums) drum carriage. A bottom view of the
lift fixture is also shown in Figure 4.2-15a. Figure 4.2-15b shows the lift fixture engaging the upper
drum carriage and the lower drum carriage. A view of a loaded drum carriage is provided in Figure 4.2-
15b. The drum carriage lift fixture has a lift capacity of approximately 6500 lbs (2948.4 kg).
Viewing Windows
Six Design Class II viewing windows are provided between the operating gallery and Hot Cell. Four
viewing windows are located in the north wall and two in the west wall. The window frames are cast in
the concrete wall separating the Hot Cell from the operating gallery. The frames are designed so that any
radiation streaming paths parallel to the optical axis are prevented. The oil shielding windows are
comprised of the frame, shielding glass, cover glasses and trim frames. The cover glasses and gaskets
retain the oil within the window housing. The cold side (operating gallery) is tempered glass while the
hot side (Hot Cell) is non-browning glass. The oil fill provides radiation shielding and acts as a heat
transfer medium. An oil expansion tank is provided as a means of keeping the window full of oil despite
the temperature excursions caused primarily by exposure to radiation and the high intensity lighting
within the Hot Cell.
4.2-9 January 28, 2003