White Paper:  Demonstration of Equivalency of Cane and Softwood Based Celotex for 9975 Packaging

Varble, Jason L.

doi:10.2172/920380

Cited by 3 publications

(4 citation statements)

References 10 publications

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“…The sugarcane and softwood samples in the studies were composed of similar wt. % of cellulose, and hemicellulose, and within the range of fiberboard samples in 9975 packages [15]. These comparable values for activation energy in the literature corroborate the study's findings that cane and softwood fiberboards have similar thermal degradation characteristics.…”

Section: Comparison and Relevance To Literature Datasupporting

confidence: 87%

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Status Report - Fiberboard Properties and Degradation Rates for Storage of the 9975 Shipping Package in KAC

Daugherty

Truong

2018

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Section: Comparison and Relevance To Literature Datasupporting

confidence: 87%

“…% and 27-54 wt. %, respectively, of cellulose [15]. Hemicellulose will affect thermal degradation reactions due to its low thermal stability, while lignin will minimally affect reactions due to its slow pyrolysis rate [16,17].…”

Section: Comparison and Relevance To Literature Datamentioning

confidence: 99%

Status Report - Fiberboard Properties and Degradation Rates for Storage of the 9975 Shipping Package in KAC

Daugherty

Truong

2018

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“…These are: the start of decomposition at 410ºF, the maximum decomposition at 759ºF, and the final decomposition of remaining organic materials at temperature 932ºF and above. [3,4] Based on these observations, if 759ºF is used as the threshold temperature at which the fiberboard is lost, a conservative (higher) estimate of t he component temperatures and the extent of fiberboard loss will be obtained.…”

Section: Methodsmentioning

confidence: 99%

Thermal Analysis of a 9975 Package in a Facility Fire Accident

Gupta

2011

Volume 7: Operations, Applications, and Components

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Surplus plutonium bearing materials in the U.S. Department of Energy (DOE) complex are stored in the 3013 containers that are designed to meet the requirements of the DOE standard DOE-STD-3013. The 3013 containers are in turn packaged inside 9975 packages that are designed to meet the NRC 10 CFR Part 71 regulatory requirements for transporting the Type B fissile materials across the DOE complex.[1] The design requirements for the hypothetical accident conditions (HAC) involving a fire are given in 10 CFR 71.73. The 9975 packages are stored at the DOE Savannah River Site in the K-Area Material Storage (KAMS) facility for long term of up to 50 years. The design requirements for safe storage in KAMS facility containing multiple sources of combustible materials are far more challenging than the HAC requirements in 10 CFR 71.73. While the 10 CFR 71.73 postulates an HAC fire of 1475°F and 30 minutes duration, the facility fire calls for a fire of 1500°F and 86 duration.T his paper describes a methodology and the analysis results that meet the design limits of t he 9975 component and demonstrate the robustness of the 9975 package.

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“…There are three distinct temperatures that are observed during thermogravimetric analysis of the fiberboard samples. [8] These are: the start of thermal decomposition at 410ºF, the maximum decomposition at 770ºF, and the final decomposition of remaining organic materials at temperature 932ºF and above. Based on these observations, fiberboard at or above 770ºF is considered char.…”

Section: Thermal Modelsmentioning

confidence: 99%

Pu/SS Eutectic Assessment in 9975 Packagings in a Storage Facility During Extended Fire

Gupta

2012

Volume 7: Operations, Applications and Components

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In a radioactive material (RAM) packaging, the formation of eutectic at the Pu/SS (plutonium/stainless steel) interface is a serious concern and must be avoided to prevent of leakage of fissile material to the environment. T he eutectic temperature for the Pu/SS is rather low (410°C) and could seriously impact the structural integrity of the containment vessel under accident conditions involving fire. The 9975 packaging is used for long term storage of Pu bearing materials in the DOE complex where the Pu comes in contact with the stainless steel containment vessel. Due to the serious consequences of the containment breach at the eutectic site, the Pu/SS interface temperature is kept well below the eutectic formation temperature of 410˚C. This paper discusses the thermal models and the results for the extended fire conditions (1500°F for 86 minutes) that exist in a long term storage facility and concludes that the 9975 packaging Pu/SS interface temperature is well below the eutectic temperature.

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White Paper: Demonstration of Equivalency of Cane and Softwood Based Celotex for 9975 Packaging

Cited by 3 publications

References 10 publications

Status Report - Fiberboard Properties and Degradation Rates for Storage of the 9975 Shipping Package in KAC

Status Report - Fiberboard Properties and Degradation Rates for Storage of the 9975 Shipping Package in KAC

Thermal Analysis of a 9975 Package in a Facility Fire Accident

Pu/SS Eutectic Assessment in 9975 Packagings in a Storage Facility During Extended Fire

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