View Document Here - Hanford Site

DOE/RL-90-11, Rev. 2
05/99
1 the basin floor. The drain assembly consists of approximately 10 feet of small bore, stainless steel piping
2 with a manually operated valve at the end. This drain piping was removed and replaced in 1996 after
3 300 Area WATS operations ceased. The original valve was reused. Since operations ceased in 1995, the
4 coating at basin lowpoints visibly has deteriorated.
5
6 Tank 50 was installed in November 1982 in a new concrete catch basin with an acid resistant coating.
7 The original basin coating remains intact. Tank 50 is a vertical, cylindrical, 304-L stainless-steel tank
8 with a capacity of 18,927 liters. The wall and head thickness of the tank is 0.64 centimeter. The tank
9 diameter is 2.87 meters, and the height is 4 meters. The tank had external electrical heat and full
10 insulation for freeze protection. Two maintenance holes are provided, one on top and one in the lower
11 south side. The tank is equipped with a slow-speed mechanical agitator and an ultrasonic indicator that
12 acted as an overfill alarm. A low-point floor drain exists at the northeast comer of the tank 50 basin.
13 The drain discharges to the 300 Area PS via the WATS and U-Bearing Piping Trench located beside the
14 basin. The drain is connected to a pipe stub with a manually operated valve located just outside the basin
15 wall. During operations, this valve remained closed except during draining. This valve is now kept
16 open.
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18 Solutions from tanks 40 and 50 were pumped via transfer pump P 10 into a tank trailer and transported to
19 the 340-B Building for transfer by railcar to the DST System, or were transported offsite for disposal.
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21 The 311 Tank Farm currently contains a 15,141-liter tank used to store product nitric acid that was
22 removed from service before RCRA operations, and two 37,854-liter tanks used to store sodium
23 hydroxide (tanks 1 and 2). All of these tanks were process chemical (product) tanks that did not manage
24 RCRA waste and are not a portion of the 300 Area WATS closure.
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27 2.2 SECURITY INFORMATION
28 Security information for the Hanford Facility is discussed in the Hanford Facility Dangerous Waste
29 Permit Application, General Information Portion (DOE/RL-91-28).
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31 All persons entering the 300 Area must display a DOE-issued security identification badge indicating
32 appropriate authorization. Personnel are subject to random searches of items carried into and out of the
33 300 Area. Signs posted at the 300 Area boundaries inside the Hanford Site state:
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35 NO TRESPASSING. SECURITY BADGES REQUIRED BEYOND THIS POINT.
36 GOVERNMENT VEHICLES ONLY. PUBLIC ACCESS PROHIBITED.
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38 or an equivalent legend.
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40 To preclude unknowing access into the unit by unauthorized individuals, the 334-A Building,
41 313 Building, and the 303-F Building are kept padlocked. These buildings also are posted to allow entry
42 by authorized personnel only and to identify hazards presented by the facilities. The 300 Area WATS
43 area of the 333 Building, and the 334 and 311 Tank Farms that are outdoors, are roped off and posted to
44 allow authorized entry only.
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990525.1349 2-6