1. Considerations for Cryostat Membrane Materials Storage Underground
Fire/life safety hazards, regulations, constraints
NEPA 101 Life Safety Code & IBC 2012
Managing aisle ways, lighting, & ignition sources
Crate material – experience at ProtoDUNE vs. ICARUS
Cardboard vs. Wood
Fire characteristics of the material – Safety Data Sheets
Flammability/ Smoke
Stability & reactivity – Burning produces poison/toxic gases
Storage capacity underground on top of the cryostat frame
Access & stability of the stacked crates
Material handling of the crates
LBNF Project Team | LBNF/DUNE FS Interface Meeting

2. Considerations for Cryostat Membrane Materials Storage Underground
Figure 3’x3’x9’ is a typical GTT crate/box.  That’s 81 cubic feet.  Consider the bottom of the exterior monorails is the highest you can stack crates.
Stacked 6 crates high which equals 18-9”
Storage on top of the cryostat leaving no aisles for access, volumetrically that is 264,468 cf (217’x65’x1875’).
That would be enough room for 3,265 crates. 
Adding 4’ aisles, and gaps between stacks, I guess 5 rows of crates, 72 crates deep, 6 crates high, or 2,160 crates is probably more realistic.
LBNF Project Team | LBNF/DUNE FS Interface Meeting

3. Back Up Slides
LBNF Project Team | LBNF/DUNE FS Interface Meeting

4. Storage of Material At Top
The Life Safety system not only encompasses fire sprinkler system, but a smoke control (abatement) system.
The cavern fire sprinkler suppression system is designed as an Ordinary Hazard classification which allows minimal storage of materials.
Though the system was not designed for the volume of crate storage, it should provide amble control in order to provide a tenable environment (minimize smoke propagation) for the occupants to egress safety out. This is based on the studies (computer modeling) and different scenarios. One such model included the fire sprinkler system failure. This scenario still allowed amble time for the occupants to evacuate safety, as long as the smoke control system activated.
These assumptions will also be reviewed with the A/E on record
LBNF Project Team | LBNF/DUNE FS Interface Meeting

5. Storage of Material at Top (Continued)
Need to verify the stability of stacked crates at surface before storing 5 or 6 high below ground.
Aisle widths must be a minimum of 0.9 m (36-inches).
The arrangement of stacked crates should not create dead-end corridors. If the arrangement of crates does crate a dead-end corridor, then a maximum length of the dead-end must be 6 m (20-ft).
Sufficient lighting and posted temporary exit signage shall be provided.
No hot work will be allowed and ignition sources must not be introduced
LBNF Project Team | LBNF/DUNE FS Interface Meeting