silo 3 - U.S. Department of Energy
silo 3 - U.S. Department of Energy
silo 3 - U.S. Department of Energy
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8.3.1<br />
Receipt, Storage, and Transfer '<strong>of</strong> Raw Materials<br />
Process Control Plan for the Silo 3 Project<br />
Document No. 40430-PL-0003, Rev. 1<br />
Jacobs Project Number 35H19605<br />
September 5, 2003<br />
~ ~~ ~~~ ~~~~~<br />
Sodium lignosulfonate is received as a 47% solution in portable tote containers, One<br />
container is placed in the concrete containment area, while a spare is placed in the Sodium<br />
Lignosulfonate Portable Containment Dike. On an as-needed basis, the Sodium<br />
Lignosulfonate Pump transfers full-strength solution to the Additive Mix Tank. Both flow<br />
rate and flow total are monitored by Flow Control Loop FQIT-PMP-44-5000A. The pump is<br />
shut <strong>of</strong>f on High level in the mix tank, or when a predetermined quantity <strong>of</strong> solution has<br />
been transferred (whichever happens first).<br />
Ferrous sulfate is received as a 15% solution in tanker trucks. Tankers are unloaded by on-<br />
board pumps into the Ferrous Sulfate Tank; a control valve on the pump discharge line<br />
closes on High-High level in the tank. The tank is continuously agitated unless the level<br />
drops to Low-Low, at which the point the agitator is shut <strong>of</strong>f. On an as-needed basis, the<br />
Ferrous Sulfate Pump transfers full-strength solution to the Additive Mix Tank. Both flow<br />
rate and flow total are monitored by Flow Control Loop FQIT-PMP-44-5000B. The pump is<br />
shut <strong>of</strong>f on High level in the mix tank, or when a predetermined quantity <strong>of</strong> solution has<br />
been transferred (whichever happens first).<br />
Process water is supplied to the suctions <strong>of</strong> both pumps for flushing the pumps, discharge<br />
lines, and/or the tank or tote. Manual valves are used to start and stop the flow <strong>of</strong> process<br />
water.<br />
8.3.2<br />
Preparation and Transfer <strong>of</strong> Mixed Additive<br />
On an as-needed basis, batches <strong>of</strong> mixed additive are prepared as follows:<br />
1. Open AOV-50-5002A and charge a predetermined quantity <strong>of</strong> domestic water to the<br />
Additive Mix Tank. The valve will automatically close on High level in the mix tank, or<br />
when the predetermined quantity has been added (whichever happens first).<br />
2. Both the Additive Mix Tank Agitator and the Additive Pump will start up once the mix<br />
tank's Low-Low level setpoint has been exceeded. Manual valves are aligned to allow<br />
recirculation back to the tank when additive is not being transferred to the Additive<br />
Charge Tanks.<br />
3. After a predetermined time period, start the Sodium Lignosulfonate Pump and transfer<br />
the appropriate quantity <strong>of</strong> solution to the mix tank. The pump will shut <strong>of</strong>f on High<br />
level in the mix tank, or when a predetermined quantity <strong>of</strong> solution has been<br />
transferred (whichever happens first).<br />
4. After a predetermined time period, start the Ferrous Sulfate Pump and transfer the<br />
appropriate quantity <strong>of</strong> solution to the mix tank. The pump will shut <strong>of</strong>f on High level in<br />
the mix tank, or when a predetermined quantity <strong>of</strong> solution has been transferred<br />
(whichever happens first).<br />
The Additive Pump transfers its contents to Additive charge Tanks A and B through AOV-<br />
44-5210 and -5197, respectively. These valves open only when the applicable charge<br />
tank is below the High-level setpoint, and additive is not being charged to the applicable<br />
Discharge Chute Assembly. If a higher transfer rate is desired, HOV-44-5244 in the<br />
Additive Mix Tank's recirculation line can be throttled back.<br />
OWM.28
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