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22 WIPP Future Advancements and Operational Safety
1. WIPP Future Advancements and
Operational Safety
Rodney L. Whisenhunt, NWP
Senior Project Manager, Capital Asset Projects
2. Historic Ventilation Modes at WIPP
●Normal Mode - 2 main 700 fans in unfiltered operation – up
to 480,000 cfm
●Alternate Mode - 1 main 700 fan in unfiltered operation –
280,000 cfm
●Filtration Mode - 1 860 fan in filtered operation – 60,000 cfm
●Operating one or two 860 fans in unfiltered (by-pass) mode
(reduced and minimum flow)
●Operating a main 700 fan in parallel with a unfiltered (by-
pass) 860 fan (maintenance)
Note: Airflows shown are nominal and at surface fan location
4. Current Filtered Ventilation System – Adding the
Interim Ventilation System (IVS) fans
●IVS added two additional filter units
●Two 960 fans with each fan having a 27,000 cfm
capacity
●Flow increased to 114,000 cfm
●Limited ability to provide ventilation to the
construction and north circuits
●Does allow for limited emplacement operations
6. Filtered Ventilation System with
Supplemental Ventilation System (SVS)
Fan in Operation
●Exhaust flow is with UVS/IVS at 114,000 cfm at surface
●SVS fan will pull air from the AIS and course the air to the
North and Construction Circuits
●The Salt Handling Shaft will be on exhaust
●Air to the disposal circuit is fixed at the UVS/IVS fan flow.
Air to the disposal circuit will be from the construction
circuit
8. Long Range WIPP Planning
●WIPP was originally designed for 8 Panels with
options for Panels 9 and 10.
●For planning purposes, NWP was directed by
CBFO to extend the mission need to the year
2050.
●Other project direction was:
●All exhaust air will be filtered from the disposal and
waste shaft station (NO unfiltered exhaust).
●All underground activities, maintenance, waste
handling, mining, etc. will be performed in parallel.
9. Long Range Ventilation Goals at WIPP
●The use of the UVS/IVS/SVS systems will
NOT be capable of meeting these long term
goals at WIPP
●The original WIPP ventilation system will
NOT be capable of meeting these mission
statement needs.
●An upgrade to the surface exhaust and filter
system is required
10. Long Range Ventilation Design Basis
●Assumed new panels would be constructed to
the west of the existing repository.
●Panels would be identical to existing panels
(room width and height, number of rooms,
length of rooms, space between panels, and
similar access airways)
●A repository life to the year 2050
●From the receipt rate to 2050, the maximum
number of additional panels was estimated at 13
11. Long Range Ventilation Design Basis
●Five main airways developed to the west. With
five airways, two will be for disposal intake.
●Allows for ground control functions in one of the
intake mains without impacting waste handling
operations.
●Mining will progress in a clockwise manner
starting to the south nearest the existing
repository mains
●Minimizes mining to complete Panel 11
●Reduces ventilation demand in early years
12. Long Range Ventilation Design
●Even without the radiation event in 2014, the Mission
statement to emplace to 2050 would result in the need
for:
●New surface fans to accommodate distance to furthest panels
●New shaft to replace aging Salt Handling Shaft and enhance
material handling capabilities
●New shaft to separate construction air from disposal exhaust
●New mining equipment (age of existing equipment would need
to be phased out)
13. WIPP Upgrade Projects
●Two new projects are considered to achieve the mission
statement:
●New surface fans with new filter system (sufficient for all
exhaust air as per DOE direction).
●New shaft (to achieve long term goals at WIPP regarding
hoisting and separation of construction [mining] and waste
handling operations)
14. Current New Filter Building (NFB) Design
●Principal underground ventilation design
criteria for NFB
●Maximum airflow of 540,000 cfm (at the fans)
●Consider a salt reduction system to minimize salt
dust from reaching containment filters
18. ES Project
●A new intake shaft results in all construction
(mining) air to be routed to the AIS for exhausting
to surface
●Eliminates a significant dust source to Exhaust Shaft
filtration system and possibly eliminates the need for a
salt reduction system on surface
●Greatly reduces any salt build up in duct work on Exhaust
Shaft
19. Hoisting System in New Shaft
• The current project does not include a
hoisting system
• A separate project is being considered to
install a hoisting system in the new shaft.
20. New Shaft with Hoisting Capability
●The need for a hoisting system is based on the following
criteria:
●Increased salt handling operations
●Increased personnel and materials handling operations
●The design would allow for salt skipping and personnel
and material handling operations to occur simultaneously
●At least doubling current salt skipping operations
●Large equipment can be hoisted via a large conveyance
●Emergency egress is significantly enhanced
21. New Shaft with Hoisting Capability
●Basis of new hoisting system design
●Need to replace existing Salt Handling Shaft (SHS)
●The SHS has been in operation since the early 1980s and was
designed for a 25 year life (currently over 30 years old)
●The current SHS is a small 10 ft. diameter shaft with
significant corrosion on internal shaft components.
●At some stage this shaft will need a major overhaul – which
will result in a cessation of salt skipping from the
underground during shaft renovation.
●A complete shaft overhaul with updated controllers on the
hoist system could take up to 12 months.
●This will impact mining to new panels to the west.
23. New Shaft with Hoisting Capability
●The need for a hoisting system is based on the following
(continued):
●The SHS has only an 8 ton skipping capacity for salt removal.
Bottlenecks were common with this limited skip capacity
(storing salt in underground airways waiting to be skipped)
●The SHS has two functions, personnel and material
conveyance and salt removal. The two functions CANNOT
occur simultaneously.
●If the SHS is skipping salt, then all personnel and material
handling is moved to the Waste Shaft – potentially limiting any
waste handling operations.
24. Shaft Conveyances and Shaft Diameter
●Twin skips – doubling salt hoisting capacity
●A 12 ft. x 18 ft. personnel and material
conveyance:
● Increased productivity since personnel can be sent
underground more efficiently
● Increased productivity in handling supplies, e.g. rock
bolts, mesh, equipment, diesel fuel, etc.
● Can handle about 100 personnel in an emergency
(egress) and is closer to new panel development
then the Waste Shaft or SHS – A Significant Safety
Improvement
●A 12 ft. x 18 ft. personnel and material
conveyance with two skips and up to
500,000 cfm results in a shaft diameter of
30 ft. (26 ft. finished)
Access to
Cage
Skip Skip
12 ft x 18 ft
Personnel
and Materials
Cage
Counterweight
15 ft13
ft
6
inch
conduit
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