silo 3 - U.S. Department of Energy

Process Control Plan for the Silo 3 Project
Document No. 40430-PL-0003. Rev. 1
Jacobs Project Number 35H19605
September 5, 2003
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Suction for the W E is provided by the Pneumatic Retrieval Blower (BLR-10-5006). This
positive-displacement blower is purchased as a package unit with appropriate monitoring
devices. The W E suction and transport airflow rate are established through proper
selection of the blower. The blower is started by the PRS operators and runs continuously
while the PRS is in operation.
Flowable material6 retrieved by the W E continues through the transport pip'ing and is I
drawn into the Pneumatic Retrieval Collector (DCL-10-5002). Once in the collector,
material is separated from the transport air stream and discharged to the Pneumatic
Retrieval Collector Discharge .Feeder (FDR-10-5104) and then ,through the Primary and
Secondary Rotary Feeders (ROF-10-5108 and ROF-10-5110). The material feeds by
gravity onto the Feed Conveyor (FDR-10-5102). This conveyor has two outlet valves on
the underside. One valve (AOV-25-5260A) allows material to flow to Packaging Loading
Stand A, and the other valve (AOV-25-5260B) allows material to flow to Packaging
Loading Stand B. These valves are opened and closed as required by the packaging
operators. Only one packaging line will be filling a container at any given time.
The following parameters associated with the Pneumatic Retrieval Collector (DCL-10-
5002) are monitored by the indicated instruments:
material level: Level Switch High (LSH-DCL-10-5002) and High-High (LSHH-10-5002)
0 pressure drop: Differential Pressure Indicating Transmitter (PDIT-DCL-10-5002)
0 particulate discharge rate: Particulate Rate Indicating Transmitter (YENIT-DCL-10-
5002)
Pneumatic conveying air leaving the Pneumatic Retrieval Collector (DCL-10-5002) passes
through the Cartridge Filter (FLT-10-5005) and then to the HEPA Filter (FLT-10-5004) for
removal of suspended fine material. The following parameters associated with the .
Cartridge Filter and the HEPA Filter are monitored by the indicated instruments:
Cartridge Filter material level: Level Switch High (LSH-FLT-10-5005) and High-High
(LSHH-FLT-10-5005)
Cartridge Filter pressure drop: Differential Pressure Indicating Transmitter (PDIT-FLT-
10-5005)
HEPA Filter: Differential Pressure Indicating Transmitter (PDIT-FLT-10-5004)
From the HEPA Filter, exhaust air continues on to the Exhaust Stack (STK-19-5209) for
release to the atmosphere. Section 4.0 (PVS) provides additional information on the
E-xh.austStack-and-Rs felafe~d~m~o~"it~o~~.n~~~fu~ncti-ons, - - - - - -- - - - - - - - - - - - - - --
e Non-flowable Silo 3 material (i.e., material that cannot be retrieved by the PRS) is mechanically
retrieved (see Section 3.0).
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