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

WIPP RH PSAR DOE/WIPP-03-3174 CHAPTER 4
The primary lid has a 31 in (78.7 cm) diameter opening that is equipped with a secondary lid. The 5.5 in
(14 cm) thick 46 in (116.8 cm) diameter steel secondary lid, weighing 2150 lbs (975.2 kg), is attached to
the center of the primary lid with 12 evenly spaced 1.75 in (4.45 cm) diameter bolts. The secondary lid
has multiple steps machined in its periphery which match those in the primary lid, eliminating radiation
streaming pathways, and is sealed to the primary lid by a double silicone O-ring.
The RH TRU 10-160B road cask is certified by the NRC per 10 CFR 71.63(b). The 10-160B road cask
arrangement, shown in Figure 4.2-5, includes impact limiters at each end of the road cask. The upper (lid
end) impact limiter weighs 5,300 lbs (2404 kg) while the lower weighs 5,200 lbs (2358 kg). Both impact
limiters extend about 12 in (30.5 cm) beyond the outside wall of the cask and are installed prior to
transport so that the cask can meet all transport environment and accident conditions. Each 102 in (259
cm) outside diameter impact limiter is constructed of polyurethane foam-filled stainless steel. The
impact limiters are secured to each other around the cask by eight ratchet binders. The approximate total
weight of a fully loaded 10-160B road cask with impact limiters is 72,000 lbs (32658.65 kg) and has an
overall length of 130 in (3.3 m). The impact limiters are provided with lifting lugs, allowing the use of
rigging for handling. The 10-160B cask is equipped with four tie-down lugs welded to the outer shell.
The cask also has two lifting lugs and two redundant lifting lugs which are removed during transport and
reinstalled for waste handling operations. The secondary lid is equipped with three lifting lugs used to
lift both lids. Both lids are covered by the top impact limiter and rain cover during transport.
Cask Lifting Yoke
The Design Class IIIA lifting yoke is a lifting fixture that attaches to either hook of the 140/25-ton crane
and is designed to lift and rotate the 72B road cask by engaging its handling trunnions. Figure 4.2-6
shows the 140/25-ton overhead crane with the cask lifting yoke lowering a 72B road cask onto the 72B
cask transfer car.
72B Road Cask Transfer Car
The 72B road cask transfer car is a self-propelled, rail guided structural steel car with two A-frame
supports and a bottom positioning fixture designed to hold the 72B road cask in the vertical position.
The point of the A-frame is designed to cradle the transport trunnions of the road cask (Figure 4.2-7),
while the positioning fixture prevents the cask from moving.
The four wheeled car, weighing 3950 lbs (1792 kg) , is designed to transport the loaded 72B road cask
from the transport trailer to the cask preparation station, then to the CUR. It also repeats the route in
reverse for empty road casks. Each of the two front wheels is powered by an electric motor which moves
the car at one of two speeds, 16.5 or 66 ft. (5.0 or 20.1 m) per minute.
10-160B Road Cask Transfer Car
The 10-160B road cask transfer car (Figure 4.2-8) is a four wheeled, self-propelled, rail guided structural
steel car constructed similar to the 72B cask transfer car without the A-frame structure. The 10-160B
road cask transfer car weighs 2930 lbs (1329 kg) and is designed to transport the 10-160B road cask, in
the vertical position, from the transport trailer to the CUR. It also repeats the route in reverse for an
empty 10-160B cask. Each of the two front wheels is powered by an electric motor which moves the car
at one of two speeds, 16.5 or 66 ft. (5.0 or 20.1 m) per minute. The 10-160B road cask transfer car can
be configured with an A-frame structure to support the 72-B road cask.
4.2-4 January 28, 2003