Tank characterization report for double-shell Tank 241-AW-102

DiCenso, Alba; Amato, Letizia; Franklin, J.D.; Nuttall, G.L.; Tran, Trinh; Simpson, B.C.

doi:10.2172/10189552

Cited by 4 publications

(11 citation statements)

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“…tion data (Castaing 1994, DiCenso et al 1995. All other sludge components were arbitrarily assigned a -I In an aqueous environment, the density of hydrous, less cystalline PuO, may be lower than 1 1.4 due to waters of hydration and some crystal disordering.…”

Section: Simplified Sedimentation Modelmentioning

confidence: 99%

“…These sizes were selected to match the particle size distributions, based on available light scattering data for solids in Tanks SY-102 (DiCenso et al 1995) and (2-106 (see Cashing 1994 for available data). As discussed in Chapter 3, these particle size distributions actually represent heterogeneous agglomerates; plutonium probably does not exist as pure discrete particles.…”

Section: Three-dimensional Fluid Dynamic Modeling With the Tempest Codementioning

confidence: 99%

“…For the TEMPEST calculations for Tank SY-102, a measured value for the fluid density (1.03 g/cm3 from DiCenso et al 1995) and the estimated molecular viscosity of the supernate of 1 cp (see Onishi and Hudson 1996) were used for the base fluid. The slurry molecular viscosity is then calculated by multiplying the molecular viscosity of the base fluid by a factor of a raised to the power P: For some SY-102 tank simulations, values of a and C , , were selected to be 4,500,000 and 0.53, respectively, based on limited SY-102 sludge data (DiCenso et al 1995). The a value of 4,500,000 was obtained as the ratio of the largest recently measured SY-102 sludge viscosity-of approximately 4,500 Pa-s to the supernate viscosity of 1 cP.…”

Section: Tempest Fluid Dynamic Modelmentioning

confidence: 99%

“…Currently, data from only two Hanford tanks is utilized; C-106 and SY-102 (Castaing 1994,.DiCenso et al 1995. As discussed in Chapter 3, these particle size distributions represent flocs of primarily submicron particulates.…”

Section: Tempest Fluid Dynamic Modelmentioning

confidence: 99%

“…However, analyzing the segregation, assuming they represent discrete particles, is conservative and provides a defense in depth when determining the potential for criticality occurring during retrieval. Due to the lack of specific information on the density of different sized particles, all TEMPEST calculations for cases dealing with Tanks C-106 and AY-102 initially assume the particles have a uniform density of 2.44 g/cm3, based on C-106 solids properties (DiCenso et al 1995). For the TEMPEST calculations on Tank SY-102, a particle density of 1.80 g/cm3 is used, based on DiCenso et al (1995).…”

Section: Tempest Fluid Dynamic Modelmentioning

confidence: 99%

See 4 more Smart Citations

Potential for criticality in Hanford tanks resulting from retrieval of tank waste

Whyatt¹,

Sterne²,

Mattigod³

1996

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Section: Simplified Sedimentation Modelmentioning

confidence: 99%

Section: Three-dimensional Fluid Dynamic Modeling With the Tempest Codementioning

confidence: 99%

Section: Tempest Fluid Dynamic Modelmentioning

confidence: 99%

Section: Tempest Fluid Dynamic Modelmentioning

confidence: 99%

Section: Tempest Fluid Dynamic Modelmentioning

confidence: 99%

See 3 more Smart Citations

Potential for criticality in Hanford tanks resulting from retrieval of tank waste

Whyatt¹,

Sterne²,

Mattigod³

1996

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Fluid dynamics, particulate segregation, chemical processes, and natural ore analog discussions that relate to the potential for criticality in Hanford tanks

Barney¹

1996

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Abstract.'This rcport prcsmis an tu-depth review of the potmdal for nudcar critiulity to ucsur in Hmtord defense waste tanks during past. CU:UTTCII~ and future safe Storage and mintcnanCe operations The report also briefly discusses lhe potential impacts of proposed retrieval activities. altliaugh retrieval was not a main focus of smpe. Alter thorough review of fluid dynamic aspects that focus on partrcle segregation, cheinical aspects that focus on solubility and adsorption processes that might concentrate plutonium andlor aeparate plutonium from the neutron absorbers in the lank waste, and ore-body fomatioii and mining operatiuns, the interdiswplin.iry tcam has come to the Conclusion that there IS negligible risk of iluclear critically under existing storage conditions in Hanfurd Site underground wabtr storage tanks. Further, fbr the accident scenarios considered an accidental criticality 16 incredible.The executive summary and suiiimaries at the end of cach brcli~ii 111 which subshidial analyses, calculations or literature interprehtions were perfmncd pmvidc more detailed findings and suppolt tor these conclusions. TRAOEMARK DISCLAIMERReference herein to any specific c o m e r c i a 1 product, process, or ACKNOWLEDGHENTSThe authors wish t o thank Ed Lipke, Bob Cash, Dave Nyham, and e s p e c i a l l y Dave Bratzel o f Westinghouse Hanford Company f o r funding t h i s work and keeping us focused on t h e key objectives. We wish t o thank Don Alexander from t h e U.S. Department o f Energy, Richland Operations O f f i c e f o r i n t r o d u c i n g us t o t h e t e c h n i c a l issue and programmatic h i s t o r y . H i s i n s i g h t and p r e l i m i n a r y analyses gave us a good foundation from which t o venture forward. thank Joe Brothers from t h e P a c i f i c Northwest National Laboratory Program O f f i c e f o r g u i d i n g us on protocols, f o r being our l a i s o n t o t h e Westinghouse Hanford Company f i n a n c i a l and program groups, f o r being our advocate i n several programmatic meetings, and f o r reviewing t h e d r a f t document. r e l a t e d work, both published and drafts, and helped guide us t o o t h e r important l i t e r a t u r e o r issues. recognize John Lafemina, Reza Shekarriz, Jun Liu, B r i a n Rapko, Penny Colton, Jim Campbell, Greg Lumetta, Jack Ryan, and We wish t o acknowledge t h e s t i m u l a t i n g discussions t h a t we had w i t h outside consultants, o t h e r Hanford S i t e s t a f f members, and formal reviewers, who were o f t e n unknown t o us, b u t whose comments on d r a f t m a t e r i a l helped sharpen t h e f i n a l r e p o r t .( p r i v a t e consultant), Nabil Morcos (Idaho National Engineering Laboratory), Dick Vorehm (M. Chew & Associates), Wally Schulz (W23 Company), Roland F e l t , Carole Sohn, and Harry C a l l e y (U.S. Department o f Energy), Jess Greenborg, Lou Rodgers, and Alan Waltar (Westinghouse Hanford Company), Rob Tayloe ( B a t t e l l e Columbus) and Andy Prichard ( P a c i f i c Northwest National Laboratory...

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Evaluation of scaling correlations for mobilization of double-shell tank waste

Shekarriz¹,

Hammad²,

Powell³

1997

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Executive Summary *In this report, we have examined some of the fundamental mechanisms expected to be at work during mobilization of the waste within the double-shell tanks at Hanford. The motivation stems from the idea that in order to properly apply correlations derived from scaled tests, one would have to ensure that appropriate scaling laws are utilized. Further, in the process of delineating the controlling mechanisms during mobilization, the currently used computational codes are being validated and strengthened based on these findings.Experiments were performed at 1/50-scale, different from what had been performed in the previous fiscal years (i.e., 1/12-and 1/25-scale). It was anticipated that if the current empirical correlations are to work, they should be scale invariant. The current results showed that linear scaling between the 1/25-scale and 1/50-scale correlations do not work well.Several mechanisms were examined in the scaled tests which might have contributed to the discrepancies between the results at these two scales. No deficiencies in the experimental approach and the data were found. Cognizant of these results, it was concluded that the use of the current empirical correlations for ECR should be done cautiously taking into account the appropriate properties of the material for yielding.To better understand some of the fundamental mechanisms within the "separate-effect" processes during mobilization, theoretical analysis was carried out, supported by careful laboratory measurements of turbulence within Newtonian and non-Newtonian jets. It was concluded that most of the mechanisms related to scaling of turbulent Newtonian jets and pseudoplastic jets are considered to be unimportant. It was found that as long as geometric scaling was properly maintained, the fluid did not develop any yield stress, and the jet Reynolds numbers were maintained above 10,000, then the dynamics within the jets scaled well. However, the jet turbulence studies were performed from a normal jet -sludge interaction point of view. It was concluded that the reason the 1/50-scale and 1/25-scale (and perhaps 1/12-scale) results did not scale was because of off-normal jet -sludge interactions. We do not believe that the material property variance played a significant role in the scaled experiments. Once the effect of off-normal interaction is included, then the results from various scales should collapse onto a unique set of curves.

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Tank characterization report for double-shell Tank 241-AW-102

Abstract: Portions of this document may be illegible in electronic image products. Images are produced from the best available original document.

Cited by 4 publications

References 0 publications

Potential for criticality in Hanford tanks resulting from retrieval of tank waste

Potential for criticality in Hanford tanks resulting from retrieval of tank waste

Fluid dynamics, particulate segregation, chemical processes, and natural ore analog discussions that relate to the potential for criticality in Hanford tanks

Evaluation of scaling correlations for mobilization of double-shell tank waste

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