silo 3 - U.S. Department of Energy

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2.0 DESIGN BASIS
2. I Pneumatic Retrieval System
Timed Estimate of Secondary Waste for the Silo 3 Project
Document No. 40430-RP-0012, Rev. 0
JE Project No. 35H19605
July 11, 2002
The following assumptions apply to the PRS for the am’ount of secondary waste
generated:
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Three 35 percent supply pre-filters from a 1 x 3 array will be changed out every 3
weeks for 3 months.
Three 90 percent supply final filters from a 1 x 3 array will be changed out every 6
weeks for 3 months.
Three supply high-efficiency particulate air (HEPA) filters from a 1 x 3 array will be
changed out at the end of the PRS campaign.
Three 35 percent exhaust pre-filtek from a 1 x 3 array will be changed out every 3
weeks for 3 months.
Three 90 percent exhaust final filters from a 1 x 3 array will be changed out every 3
weeks for 3 months.
Three HEPA exhaust filters from a 1 x 3 array will be changed out every 3 weeks for 3
months.
Three ultra-low penetrating air (ULPA) filters from a 1 x 3 array will be changed out at
the end of the PRS campaign.
A total of 44 fabric filter bags plus a 10 percent allowance for changeout during
operations will be disposed of at the end of the PRS campaign.
A total of four filter cartridges plus a 10 percent allowance for changeout during
operations &ill be disposed of at the end of the PRS campaign.
The plastic containment sleeving associated with the Vacuum Wand Management
System (VWMS) (10 polyethylene sleeve bags) will be changed out every 6 weeks for
3 months and will generate two drums of waste.
The VWMS will generate 15 spool pieces of aluminum tubing for each of the 5 VWMS
modules. This material will be disposed of at the end of the PRS campaign.
The amount of PPE clothing generated as secondary waste will depend on the number
of PPE entries per day. Based on a normal operation and regular maintenance
schedule, it is estimated that 20 PPE entries will be made each day. This will provide
10 persons with two changes a day, or it could be distributed between fewer operators
with a greater changeout frequency. The PPE will be designated as 30 percent
radiologically contaminated and 70 percent non-radiologically contaminated. This
generation rate is based on 3 months, 4 weeks a month, and 5 days a week. It is
assumed that 50 PPE units will be contained in a 55-gallon drum.
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