Tank Farm cont'd

DOE-HDBK-3010-94

Appendix B; Plutonium Recovery Facility

maintenance room itself. The tanks themselves have support braces and mounts extending

through the steel floor into the facility concrete floor below. In doing so, the braces pass

through a shallow sump filled with borated raschig rings, which lies below an elevated steel

grating upon which personnel walk. This sump is designed to ensure a criticality will not

occur even if multiple tanks void their contents into this sump.

The tanks in this system are equipped with ever open vents to the vessel vent system and

pressure relief valves that direct flow to the raschig ring sump. Level indication is available

for each tank. High- and low-level alarms are provided locally and in the facility control

room. Supply piping to and transfer piping from each tank goes to common headers to

minimize the number of piping runs outside gloveboxes in the facility. Flow can be initiated

to or from a given tank by remotely operated air-operated valves on individual tank piping

leading to the headers. This capability was added to the system after initial construction to

minimize the need for personnel to be in the actual tank farm area. Actuation of the air-

operated valves is done at the appropriate local operating room control panel.

Lines going to and from the sample glovebox have identical air-operated isolation valves, but

three separate headers with three separate sampling systems are used to minimize

contamination and sampling error. The three systems are for pre-ion exchange dissolver

solutions, post-ion exchange product solutions, and low-level waste solutions.

The tanks located in the three tank farm enclosures and their principal functions and

capacities are listed below:

Enclosure #1

Oxide dissolution storage tank

250

liters

Oxide dissolution storage tank

250

liters

Residue dissolution storage tank

250

liters

Residue dissolution storage tank

250

liters

Metal dissolution storage tank

250

liters

Metal dissolution storage tank

250

liters

Ion exchange effluent tank

400

liters

#10

Ion exchange effluent tank

400

liters

#11

Ion exchange effluent tank

400

liters

#12

Ion exchange effluent tank

400

liters

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