ML20279A787
| ML20279A787 | |
| Person / Time | |
|---|---|
| Site: | PROJ0734 |
| Issue date: | 12/06/2016 |
| From: | Lloyd Desotell, Voegtlen R Division of Decommissioning, Uranium Recovery and Waste Programs, Savannah River Remediation |
| To: | |
| Lloyd Desotell/NMSS/DUWP | |
| Shared Package | |
| ML20279A780 | List: |
| References | |
| SRR-LWE-2016-00036, Rev 2 | |
| Download: ML20279A787 (13) | |
Text
Tank 12 Final Configuration Report Inputs SRR-LWE-2016-00036 Revision 2 December 6, 2016 Page 2 of 13 Contents Purpose.......................................................................................................................................................3 Waste Tank System Isolation.............................................................................................................3 Grouting Results Summary.................................................................................................................3 Test Cylinders......................................................................................................................................4 Grout Placement Sequence.............................................................................................................4 Visual Inspections..............................................................................................................................5 Grout Flowability...............................................................................................................................5 Liquid/Water Impact on Grouting...............................................................................................5 Tank Bulk Fill Grout Estimates and Results............................................................................6 Riser Bulk Fill Grout Estimates and Results............................................................................7 Summary of Estimated Versus Actual Grout Placed Volumes..........................................8 Failed Cooling Coil Grouting..........................................................................................................8 Intact Cooling Coil Fill Grouting and Results...........................................................................8 Equipment Fill Grout Estimates and Results...........................................................................8 Supplier Deviation Disposition Request (SDDR)................................................................11 Deviations from Closure Module...............................................................................................11 Unreviewed Waste Management Question (UWMQ)........................................................11 Non-Conforming Items.................................................................................................................11 References..............................................................................................................................................12
Tank 12 Final Configuration Report Inputs SRR-LWE-2016-00036 Revision 2 December 6, 2016 Page 3 of 13 Purpose The purpose of this document is to compile data from the grouting of Tank 12 for future reference. A deviation from the grouting configuration described in SRR-CWDA-2014-00086 (Ref. [1]) Industrial Wastewater Closure Module for Liquid Waste Tank 12H is included.
Waste Tank System Isolation The Tank 12 was isolated from the H Tank Farm (HTF) Waste Transfer System (WTS) and the HTF support systems in accordance with M-CTP-H-00003, Revision 2, Tank 12H Isolation Plan (Reference [2]). The Mechanical Isolation is documented in M-TRT-H-00090, Revision 0, Engineering Report - Tank 12 Mechanical Isolation Matrix (Reference [3]). The Electrical Isolation is documented in E-TRT-H-00012, Revision 0, Engineering Report - Tank 12 Electrical Equipment Isolation Matrix (Reference [4]). Isolation was performed in accordance with SRR-CWDA-2014-00086, Revision 0, Industrial Wastewater Closure Module for Liquid Waste Tank 12H (Reference [1]).
Grouting Results Summary Important Grouting Dates Grouting of Tank 12 began and ended in 2016, with the first in-tank concrete poured on January 19, 2016 and the final riser grouting completing on April 27, 2016. The important dates associated with this process are in Table 1: Tank Grouting Events.
Table 1: Tank Grouting Events Tank Event Date 12 Tank bulk fill begins 1/19/2016 Tank bulk fill ends 3/7/2016 Annulus bulk fill begins 2/8/2016 Annulus bulk fill ends 3/1/2016 Failed Cooling Coil grouting begins 1/26/2016 Failed Cooling Coil grouting ends 1/29/2016 Intact Cooling Coil grouting begins 3/16/2016 Intact Cooling Coil grouting ends 3/21/2016 Riser fill begins 3/31/2016 Riser fill ends 4/27/2016*
Source: Operations grouting logs
- The riser 5 spray chamber above the riser was grouted on 5/2/2016.
Filling the spray chamber is not considered riser fill.
Tank 12 Final Configuration Report Inputs SRR-LWE-2016-00036 Revision 2 December 6, 2016 Page 4 of 13 Test Cylinders During grouting, sets of test cylinders were periodically prepared from the concrete being poured into tanks and risers. The requirements for grout sampling and testing can be found in C-SPP-F-00055 Furnishing and Delivery of Tank Closure Grout (Reference [5]). Test cylinders were required to be prepared each day from the first batch delivered that day and one set from the second 100 cubic yards (CY) delivered. These cylinders were taken back to labs for curing and testing to determine the compressive strength of the grout used. 41 sets of seven test cylinders were prepared during the grouting of Tank 12, yielding a total of 287 test cylinders. From each seven cylinder set, two cylinders were tested at seven days, three were tested at 28 days and the remaining two cylinders were placed on hold to be tested if requested by SRR. All non-hold test cylinders have now been tested.
With an average 28-day compressive strength of 2383 psi, the test cylinder compressive strength average was greater than the design 28-day compressive strength of 2000 psi.
Grout Placement Sequence A structural analysis of the stresses anticipated from grout placement in the primary steel tank was performed (Reference [6]). As a result, a grout fill sequence was developed which recommended cycling grouting between the tank primary vessel and tank annulus at specific fill heights. See Figure 1 for grout fill cycles in Tank 12.
Figure 1: Fill Heights for the Grouting Cycles in Tank 12
Tank 12 Final Configuration Report Inputs SRR-LWE-2016-00036 Revision 2 December 6, 2016 Page 5 of 13 The first 213 cubic yards of Lift 1 was comprised of grout with Grade 100 slag. The remainder of the grout for Tank 12 used Grade 120 slag because Grade 100 slag was not available.
Visual Inspections Visual inspections for grout characteristics during pour operations and daily pre-operations video inspections were performed in accordance with the video inspection plan (Reference [7]). These inspections were performed using video cameras positioned daily in the anticipated optimal locations to observe the pouring (e.g. nearest riser opening to pouring location). The fresh grout properties (such as flowability, self-leveling, aggregate separation, etc.) were evaluated and observed throughout the grout placement process. The grout characteristics observed were evaluated against known or anticipated grout properties. Additionally, a comprehensive visual inspection of the area grouted was performed prior to placement of grout, at midday, and at the conclusion of daily grout activities. The inspections included; the examination for the presence of large cracks in the dried grout, shrinkage of the dried grout, non-self-leveling of the grout, and the presence of voids. On February 22, 2016, small (i.e., largest crack is estimated to be less than 3 feet) isolated cracks in the grout were identified under Tank 12 Riser 1, the location of the previous days grouting. The cracks were limited to this location and determined to have no impact on the performance assessment (Reference [8]).
Grout Flowability By keeping the grout slump flow working range between 26-30 inches (see Reference [5]), the grout was able to flow around and over the Tank 12 internal obstacles such as the cooling coils and the support columns, which decreased the risk of uneven grout distribution. Prior to grouting the risers, a visual inspection and in some cases physical measurements were performed, confirming that during bulk filling; grout had completely filled the primary and annulus and had extended into the riser. Based on this and observations of the grout flow during grouting, it was concluded that the entire volume of Tank 12 primary and annulus was filled with reducing grout.
Liquid/Water Impact on Grouting Due to liquid/water present as primary bulk fill grout approached the tank roof, the grouting of Tank 12 was unique resulting in the need to de-inventory the water from several risers before completing the riser grouting. Several factors contributed to the liquid/water presence. First, at start of grouting in January 2016, hundreds of gallons of liquid remained on the tank floor. Second, water intrusion was observed into the primary. This included rain water infiltration from the riser openings throughout the grouting process. Also, during grouting of riser 8, water in-leakage was observed. The riser 8 source of the water was never identified; however, because Tank 12 is below the water table, the most likely water source was from
Tank 12 Final Configuration Report Inputs SRR-LWE-2016-00036 Revision 2 December 6, 2016 Page 6 of 13 ground water in-leakage through a crack in the concrete riser wall. The ground water in-leakage from the leak site near the bottom of Riser 8 was informally estimated to be 5 gallons per hour. Grout was poured into Riser 8 in less than 1.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> after the liquid was pumped out. Third, during grouting of the annulus ventilation inlet duct, water was observed flowing into the duct through a crack in the duct wall. Approximately 500 gallons of water was pumped out down to an estimated 2-inch remaining liquid level prior to adding the final amount of grout to fill the ductwork inlet. The rate of water in-leakage was estimated to be approximately 6 gallons per hour, and grout was poured into the ductwork approximately 1.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> after the liquid was pumped out. Again, it was speculated that the source of the water was ground water in-leakage.
Tank Bulk Fill Grout Estimates and Results The actual grout volumes placed (tank, annulus, and risers) are based on the volumes from batch delivery tickets provided (typically 8 CY per truck for bulk fill grout).
Tank 12 Primary Tank The estimated volume to fill a Type I tank was calculated as part of U-CLC-G-00001 (Reference [9]). The calculation predicts 793,411 gallons (3928 CY) per tank without riser volumes and accounts for the top and bottom primary tank knuckle curvatures by estimating the volume using a chamfer estimate. To better represent the tank and more accurately estimate the volume, the top chamfer was replaced with the estimate of the top and bottom knuckle curvatures (795,082 gallons). The volume of residual material on the Tank 12 primary floor is estimated to be 1,500 gallons (Reference [10]). The volume of residual material on the Tank 12 cooling coils is estimated to be 400 gallons (References [10] [11]). Accounting for the residual material, the final estimated Tank 12 volume is 793,182 gallons (3927 CY).
The estimated volume of the primary risers (Note: includes 4 spray chambers) was 5655 gallons or 28 CY and was determined using design drawings (References [12]
[13] [14] [15] and [16]). The estimated volume does not account for approximately five cubic yards of volume associated with riser plugs that remain in the risers.
According to Operations logs (confirmed with WO 01337683 - 33, Reference [17])
920,244 gallons (4556CY) (3887 CY in the primary plus 15 CY in the primary risers) of grout were actually used for the bulk filling of Tank 12 and risers. (See Table 2:
Estimated vs. Actual Grout Volumes for Tank 12)
Tank 12 Annulus The estimated volume to fill a Type I tank annulus was calculated as part of U-CLC-G-00001 (Reference [9]). The calculation predicts an annulus volume of 111,549 gallons (552 CY). To refine this value, the volume of top and bottom knuckles (tank
Tank 12 Final Configuration Report Inputs SRR-LWE-2016-00036 Revision 2 December 6, 2016 Page 7 of 13 curvature) of 6,104 gallons was included. This volume is based on a dimensional drawing (Reference [12]). This resulted in 117,653 gallons (583 CY) to fill a Type I tank annulus excluding the risers. The estimated volume of the annulus risers was 4,443 gallons or 22 CY and was determined using design drawings (References [13]
[14] and [15]).
According to Operations logs (confirmed with WO 01337683 - 33, Reference [17]),
126,032 gallons (624CY) (613 CY in the annulus plus 11 CY in the annulus risers) of grout were actually used for the annulus bulk filling of Tank 12 and annulus risers.
(See Table 2: Estimated vs. Actual Grout Volumes for Tank 12)
Riser Bulk Fill Grout Estimates and Results All risers were successfully filled with grout to the bottom of the top riser cover/plate, above the grade level.
The estimated volume to fill the risers (primary and annulus) is 10,099 gallons (50 CY). The estimated volume was based on design drawings (See References [13] [14]
[15] and [18]).
According to Operations logs, 5200.8 gallons (25.75 CY) of grout were actually used to fill the Tank 12 risers. This included the four spray chambers which were filled.
(See Table 2: Estimated vs. Actual Grout Volumes for Tank 12)
A total of approximately 1,200 gallons of water/liquid were pumped out of seven tank risers (Risers 1, 2, 5, 6, 7, 8, and Center). The pump was typically capable of pumping the liquid level down to approximately two inches in the riser. This small amount of water/liquid was considered inconsequential to grout integrity.
The difference from the estimated volume to the actual volume can be partially attributed to the grout placed into the risers during bulk fill grouting of the primary tank. Additionally, the estimated volume to fill risers (50 CY) assumed riser plugs were removed. In fact, some riser plugs remained in place during grouting. The volume associated with the remaining riser plugs results in the estimated volume to fill the risers being conservatively high.
Tank 12 Final Configuration Report Inputs SRR-LWE-2016-00036 Revision 2 December 6, 2016 Page 8 of 13 Summary of Estimated Versus Actual Grout Placed Volumes Table 2:
Estimated vs. Actual Grout Volumes for Tank 12 Tank 12 Estimated (CY)
Actual (CY)
Total Tank 12 w/o Risers 3927 3887 Total Tank 12 Annulus w/o Risers 583 613 Primary Risers (includes 4 spray chambers) 28 15 Annulus Risers 22 11 Total Tank 12 4560 4526 Failed Cooling Coil Grouting Tank 12 had 28 failed cooling coils (Reference [19]). The failed cooling coils, coils with a guillotine failure or coils unable to maintain pressure, were grouted from each end (inlet and outlet) per Work Order (WO) 01337683 Task 50 (Reference
[20]), meeting the requirements of the Grout Strategy (Reference [21]).
Intact Cooling Coil Fill Grouting and Results Tank 12 has a total of the 36 total cooling coils, 8 were designated as intact with the balance classified as failed. The intact coils were grouted per Work Order (WO) 01337683-31 (Reference [22]).
In all eight cases, the intact coil was confirmed to be fully grouted when a solid stream of grout plus a minimum of ten additional gallons of grout were observed discharging from the exit end of the cooling coil into a gray water collection tote.
Equipment Fill Grout Estimates and Results Grout was supplied to the equipment in a slow deliberate manner allowing the equipment to self-vent, to reduce the likelihood of air pocket formation. The equipment grout was placed by hand pouring using buckets of a known volume.
The grout volumes actually placed in the equipment were based on the total volume of the buckets poured.
Engineering estimated the volume of remaining in-tank equipment. The volumes were based on design drawings referenced below. Table 3 summarizes both these initial estimates and the actual grout placed as recorded in the equipment fill work packages WO 01337683-51 (Reference [23]).
Tank 12 Final Configuration Report Inputs SRR-LWE-2016-00036 Revision 2 December 6, 2016 Page 9 of 13 Table 3: Estimated vs. Actual Grout Volumes for Tank 12 In-Tank Equipment Tank Riser Equipment In Closure Module?
(Ref. [1])
Estimated Grout Volume (Gallons)
Reference Actual Grout Volume (Gallons)
Reference 12 1
Riser Box -
Spray Chamber Y
90 S5-2-11853 (Ref. [24])
0.5 Note 1 WO 01337683-51 Step 4.16, Ref. [23]
12 3
Riser Box -
Spray Chamber Y
90 S5-2-11853 (Ref. [24])
0.5 Note 1 WO 01337683-51 Step 4.35, Ref. [23]
12 5
Riser Box -
Spray Chamber Y
90 S5-2-11853 (Ref. [24])
0.5 Note 1 WO 01337683-51 Step 4.54, Ref. [23]
12 8
Riser Box -
Spray Chamber Y
90 S5-2-11853 (Ref. [24])
0.5 Note 1 WO 01337683-51 Step 4.73, Ref. [23]
12 4
Reel Tape Riser Plug Penetration N
Note 2 1.6 D182616 (Ref. [25])
1.5 WO 01337683-51 Step 4.294, Ref. [23]
12 4
High Level Liquid Conductivity Probe (HLLCP)
Y 1.7 D182616 (Ref. [25])
1.5 WO 01337683-51 Step 4.313, Ref. [23]
12 4
HLLCP -
Housing Y
N/A N/A N/A N/A 12 4
Thermowell Y
1.8 D182318 (Ref. [26])
1.5 WO 01337683-51 Step 4.352, Ref. [23]
12 4
Thermowell Housing on Floor Y
N/A N/A N/A N/A 12 4
Spray Lance for Thermowell N
Note 3 1.2 D182318 (Ref. [26])
1 WO 01337683-51 Step 4.370, Ref. [23]
12 4
H&V Riser Drain Y
1 D182616 (Ref. [25])
1.5 WO 01337683-51 Step 4.333, Ref. [23]
12 6
Abandoned Transfer Jet Y
N/A Note 4 S5-2-3512 D182617 (Ref. [27] and
[28])
N/A N/A 12 7
Submersible Transfer Pump (STP)
Y 22 P-PA-H-8959/8960 (Ref. [29] and
[30])
Note 5 39 WO 01337683-51 Step 4.233, Ref. [23]
Tank 12 Final Configuration Report Inputs SRR-LWE-2016-00036 Revision 2 December 6, 2016 Page 10 of 13 12 7
Caisson Lance N
Note 6 4.75 P-PA-H-8959/8960 (Ref. [29] and
[30])
4 WO 01337683-51 Step 4.252, Ref. [23]
12 7
Thermowell Y
2 P-PA-H-8959/8960 (Ref. [29] and
[30])
1 WO 01337683-51 Step 4.274, Ref. [23]
12 Center Dewatering Pump Y
N/A N/A N/A N/A 12 East Region of Floor Sample Crawler Y
N/A N/A N/A N/A 12 West Region of Floor Sample Crawler Y
N/A N/A N/A N/A 12 East Region of Floor Steel Wall Temperature Element Y
N/A N/A N/A N/A 12 North Annulus Conductivity Probe #1 Y
0.3 S5-2-11824 (Ref. [31])
0.25 WO 01337683-51 Step 4.154, Ref. [23]
12 North Annulus Conductivity Probe #2 Y
0.25 S5-2-11824 (Ref. [31])
0.25 WO 01337683-51 Step 4.174, Ref. [23]
12 North Annulus Steam Jet (Core and Discharge Line)
Y 22 S5-2-6654 (Ref. [32])
26 WO 01337683-51 Step 4.93 and 4.134, Ref. [23]
12 North Annulus Steam Jet (Jacket)
Y 8.5 S5-2-6654 (Ref. [32])
1 Note 7 WO 01337683-51 Step 4.114, Ref. [23]
12 South Annulus Conductivity Probe #1 Y
0.2 W149522 (Ref. [13])
0.25 WO 01337683-51 Step 4.194, Ref. [23]
12 South Annulus Conductivity Probe #2 Y
0.2 W149522 (Ref. [13])
0.25 WO 01337683-51 Step 4.214, Ref. [23]
12 East Annulus Wall Crawler N
Note 8 N/A N/A N/A N/A 12 West Annulus Dewatering Pumps (2)
N Note 9 N/A N/A N/A N/A Note 1-Because the gap between the spray chamber and the riser wall was limited, the potential existed for a void to form. A grout addition line was added as a contingency. However, during the grouting of the riser, the space was filled making the grout addition unnecessary. As a result, only a very limited quantity of grout was added equal to the volume of the addition line.
Note 2-The reel tape plug penetration was a pipe that extended through the riser plug. The small line terminated just under the plug and was deemed as non-equipment with regards to the Closure Module and therefore not mentioned.
Note 3-The Closure Module (Ref. [1]) Table 7.2-1 did not identify in Riser 4 a Spray Lance (Ref. [26]) for the Thermowell.
Note 4-The abandoned jet was suspended in the riser below the top riser plate. Based on the orientation, location, and accessibility, the jet could not be directly grouted. The riser access ports did not align with the jet nozzles making the use of a grout wand or a pipe problematic. Therefore, grout was introduced into the riser, filling of the jet by gravity feed. Jet fill percentage is indeterminate, but based on past results; the jet was likely filled.
Tank 12 Final Configuration Report Inputs SRR-LWE-2016-00036 Revision 2 December 6, 2016 Page 11 of 13 Note 5-The larger than calculated actual grout volume for the STP is attributed to grout initially flowing out of the open end of the bottom of the pump. STP grout fill was temporarily halted, and grout was placed in the bottom of the STP caisson to seal the pump. When STP grout fill was resumed, the STP filled with grout as expected.
Note 6-The Closure Module (Ref. [1]) Table 7.2-1 did not identify in Riser 7 caisson lance (Ref. [29] and [30]).
Note 7-The steam jet jacket is a nominal 3-inch diameter pipe that surrounds the steam jet core which is a nominal 2-inch diameter pipe. Therefore, the annulus opening inside the jacket around the core pipe is less than 1/2 inch wide.
This small opening proved difficult to fill and received only 1 gallon of grout.
Note 8-In November 2015, a wall crawler (e.g., Ultrasonic (UT)) device was installed in the Annulus East Riser to obtain Tank 12 primary vessel wall thickness data. After the inspection, the instrument was abandoned in the annulus.
Note 9-The Closure Module (Ref. [1]) Table 7.2-1 did not identify in West Annulus two abandoned Dewatering Pumps.
The pumps were installed per Work Order 01429502 (Ref. [33]).
Supplier Deviation Disposition Request (SDDR)
None Deviations from Closure Module The following deviation or difference is noted between the final configuration of Tank 12 and those identified in the SRR-CWDA-2014-00086 (Ref. [34] ) Industrial Wastewater Closure Module for Liquid Waste Tank 12H.
Closure Module Requirement:
SRR-CWDA-2014-00086 (Ref. [34] ) Section 7.2-1 Equipment to Remain in Tank 12H Primary does not identify in Riser 4 the Spray Lance (Ref. [26]) for the Thermowell and the two Dewatering Pumps in the West Annulus.
Deviation:
The Riser 4 contained a Spray Lance which was grouted internally (Ref. [23]) and the two dewatering pumps were grouted in place at the bottom of the West Annulus.
Unreviewed Waste Management Question (UWMQ)
None Non-Conforming Items None
Tank 12 Final Configuration Report Inputs SRR-LWE-2016-00036 Revision 2 December 6, 2016 Page 12 of 13 References
[1] J. P. Pavletich, SRR-CWDA-2014-00086;0 - "Industrial Wastewater Closure Module for Liquid Waste Tank 12H", May 2015.
[2] M-CTP-H-00003;2 - "Tank 12H Isolation Plan", 2015.
[3] D. C. Massey, M-TRT-H-00090;0 - "Tank 12 Mechanical Isolation Matrix", June 2015.
[4] J. W. Engledow, E-TRT-H-00012;0 - "Tank 12 Electrical Equipment Isolation Matrix", June 2015.
[5] A. Ganguly, C-SPP-F-00055;5 - "Furnishing and Delivery of Tank Closure Grout",
January 2016.
[6] E. Macaraeg, T-CLC-F-00496;1 - "Closure Grouting for Type I Tanks 5 and 6 and all Type I and Type II Tanks", May 2014.
[7] R. O. Voegtlen, SRR-LWE-2014-00162;0 - "Video Inspection Plan for Tank 12 During Tank Grouting Activities", February 2015.
[8] R. O. Voegtlen, SRR-LWE-2016-00020;0 - "Tank 12 Grout Cracks under Riser 1",
2016.
[9] J. J. Phillips, U-CLC-G-00001;1 - "Total Fill Volumes of High Level Waste Tanks",
February 2009.
[10] J. L. Clark, U-ESR-H-00125;0 - "Tank 12 Final Volume Determination and Uncertainty Estimate", 2014.
[11] G. M. Grim, M-CLC-H-03256;0 - "Tank 12 Internal Component Solid Coating Volume Estimation", 2014.
[12] W145379:4 - "Waste Storage Tanks 241 F & H 75'-0" Dia. Steel Tank Details Steel (U)".
[13] W149522;92 - "200 Area Waste Storage Tanks, Riser & Plug Details Concrete &
Steel Process (U)".
[14] W146593;49 - "Dehumidication System Heating and Ventilation (U)".
[15] W146758;69 - "200 Area Waste Storage Tanks 241 F & H Riser, Plug & Opening Details Concrete and Steel".
[16] W145573;29 - "Type I Tanks 1-8 and 9-12 General Arrangement & Construction Details Concrete and Steel".
[17] G. W. Patton, Work Order 01337683 Task 33;2 - "Placement of Bulk Fill Grout Tank 12".
[18] D180209;46 - "BLDG 241 F & H Area Waste Removal Facilities Slurry Pump Installation Type I Process Detail (U)".
[19] S. J. Worthy, SRR-LWE-2012-00030;1 - "Tank 12 Cooling Coil Flush Strategy",
2012.
[20] O. Alexander, Work Order 01337683 Task 50;1 - "Tk 12 Grout Failed Coils".
Tank 12 Final Configuration Report Inputs SRR-LWE-2016-00036 Revision 2 December 6, 2016 Page 13 of 13
[21] T. L. Chandler, SRR-LWE-2014-00147;1 - "Tank 12H Grout Strategy", 2015.
[22] O. Alexander, Work Order 01337683 Task 31;2 - "Tank 12 Flush & Grout Intcat Chromate Cooling Coils".
[23] G. W. Patton, Work Order 01337683 Task 51;1 - "Tank 12 Closure Construction Perform Equipment Grouting".
[24] S5-2-11853;0 - "Transfer Pump Support Detail".
[25] D182616;10 - "Tank 12 Riser #4 Riser Plug Details Process".
[26] D182318;31 - "Thermowell Insert Plug Process".
[27] S5-2-3512;12 - "Waste Storage Tanks 11 & 12 Supernate Transfer Jet Sections and Setails (U)".
[28] D182617;4 - "Tank 12 Riser 6 Riser Plug Details Process".
[29] P-PA-H-8959;0 - "Waste Removal Processing Facilities Tank 12 Transfer Pump Installation Details".
[30] P-PA-H-8960;0 - "Waste Removal Facilities Tank 12 Transfer Pump Installation Details".
[31] S5-2-11824;0 - Waste Storage Tank No. 16 Sludge Removal 3'6" Riser Plug Details, April 1977.
[32] S5-2-6654;15 - "Waste Storage Tanks Number 1 thru 12 Annulus Transfer Jet Details".
[33] Work Order 01429502;0 - "Fabricate, Install, and Remove Tank 12 Pump Annulus/Support 241-H-4615".
[34] J. P. Pavletich, SRR-CWDA-2013-00091;1 - Industrial Wastewater Closure Module for Liquid Waste Tank 16H, April 2015.
[35] S4 ENG.46;3 - LW Unreviewed Waste Management Question (UWMQ), November 2014.
[36] Manual 1Q, Procedure 15-1;25 - Control of Nonconforming Ites, April 2016.
[37] SRR-CWDA-2010-00128;1 -" Performance Assessment for the H-Area Tank Farm at the Savannah River Site", November 2012.