Contingencies

DOE-STD-3007-93

Likewise, the elevation of the small volume trap (well above manually handled containers

near floor level) avoids the need to consider portable process containers in contact with the trap.

The trap is fabricated of standard 4" diameter x 36" tall Corning conical Pyrex glass. Based on

Corning vendor data1, the design outside diameter is 4 17/32" with a 17/64" wall, giving an inside

diameter of 4". The trap volume is thus only 7.4 liters. The trap base is elevated about 11' "

above the Room 1021 floor.

There is no ready means for operator access to the trap. There is no operational incentive

to have a process container in close proximity to the trap.

CONTINGENCIES

Loss of geometry control

(a) Transfer line leak, valve leak, trap breakage, etc., near the west wall of Room 1021

(b) Leak in transfer line to D-Wing

(d) Loss of liquid to the wet vacuum system

(e) Use of an improper container for solution drainage from the trap

ANALYSIS

Contingency 1a

Any fissile solution release from the process equipment along the west wall of

Room 1021 will result in a simple solution spill into a safe geometry slab.

The other analyses demonstrate that this diked area could retain the entire solution

inventory of the Room 1201 west wall solution process equipment without exceeding a solution

depth of 0.75". Room 1021 is identified as an unsafe container exclusion area; large, open

containers are prohibited without specific Criticality Safety approval. Posting is present regarding

this limitation.

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