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Criticality Safety Evaluation for DistributionTrap F-1202 for Solution Transfer to D-Wng
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Guidelines For Preparing Criticality Safety Evaluations at Department of Energy Non-Reactor Nuclear Facilities
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Requirements Documentation - s3007cn10025


DOE-STD-3007-93
1.0 INTRODUCTION
The following analysis has been performed to document the technical basis for the
approval of distribution trap F-1202, which is used to transfer product solution from Room 1021
scrap recovery operation to the D-1 wing or to safe bottles.
2.0 DESCRIPTION
Operation
To transfer solution into F-1202, valves are set as appropriate to receive solution from
either F-1000 (the accountability tank) or F-1202 A-D (west wall storage tanks). Wet vacuum is
applied to deliver solution to F-1202, using intermediate vacuum trap F-1201. F-1201 has a high
level probe interlocked with a block valve in the vacuum line to stop overflow from F-1202.
Vacuum to F-1202 is supplied by the final process area wet vacuum trap located in the northwest
corner of Room 1022; this trap has an audible alarm.
Solution in F-1202 may be drained to a safe bottle or the F-400 tanks in D-Wing. As each
safe bottle is filled, it is transferred to an approved storage rack or dolly. For transfer to D-Wing,
valves in D-Wing are set to deliver solution to any tanks F-400-1 through F-400-3, or F-400-6
through F-400-10.
In Room 1021, the transfer line to D-Wing passes over the Room 1021 fissile storage
array. Over this array, the stainless steel transfer line is encased in a PVC pipe that is sealed at
either end and provided with a drain on the lower end. This drain is routed to a single safe bottle
mounted near the stairway at the scrubber system.
The transfer line to D-Wing is also double-walled from the Room 1022 wall penetration
all the way to the entrance to D-Wing. Any transfer line leaks in this section will drain to a safe
bottle located on the north wall of D-Wing.
1-3


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