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Title: LIFE EXTENSION OF THE 9975 PACKAGE AS A STORAGE CONTAINER: THERMAL ANALYSIS

Authors:
;
Publication Date:
Research Org.:
SRS
Sponsoring Org.:
USDOE
OSTI Identifier:
1374403
Report Number(s):
SRNS-STI-2017-00098
DOE Contract Number:
DE-AC09-08SR22470
Resource Type:
Conference
Resource Relation:
Conference: 2017 American Society of Mechanical Engineers Pressure Vessela nd Piping Conference
Country of Publication:
United States
Language:
English

Citation Formats

Hensel, S., and Kiflu, B. LIFE EXTENSION OF THE 9975 PACKAGE AS A STORAGE CONTAINER: THERMAL ANALYSIS. United States: N. p., 2017. Web.
Hensel, S., & Kiflu, B. LIFE EXTENSION OF THE 9975 PACKAGE AS A STORAGE CONTAINER: THERMAL ANALYSIS. United States.
Hensel, S., and Kiflu, B. Tue . "LIFE EXTENSION OF THE 9975 PACKAGE AS A STORAGE CONTAINER: THERMAL ANALYSIS". United States. doi:. https://www.osti.gov/servlets/purl/1374403.
@article{osti_1374403,
title = {LIFE EXTENSION OF THE 9975 PACKAGE AS A STORAGE CONTAINER: THERMAL ANALYSIS},
author = {Hensel, S. and Kiflu, B.},
abstractNote = {},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Mar 28 00:00:00 EDT 2017},
month = {Tue Mar 28 00:00:00 EDT 2017}
}

Conference:
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  • Thermal analyses of three plutonium storage configurations (two plutonium metal and one plutonium oxide) consisting of the 3013 container within the 9975 package have been performed. All analyses are steady-state with 19 watts of Pu as contents. The analyzed conditions include allowance for storing the 9975 in a lattice configuration with stacking in a maximum ambient temperature 130 degrees F (54.4 degrees C) (assuming total loss of ventilation) and an ambient of 200 degrees F (93.3 degrees C) during accident (fire) conditions.
  • Results from the 9975 shipping package Storage and Surveillance Program at the Savannah River Site (SRS) are summarized for justification to extend the life of the 9975 packages currently stored in the K-Area Complex (KAC). This justification is established with the stipulation that surveillance activities will continue throughout the extended time to ensure the continued integrity of the 9975 materials of construction and to further understand the currently identified degradation mechanisms. The 10 year storage life justification was developed prior to storage. A subsequent report was later used to validate the qualification of the 9975 shipping packages for 10 yearsmore » in storage. However the qualification for the storage period was provided by the monitoring requirements of the 9975 Storage and Surveillance Program. This report summarizes efforts to determine a new safe storage limit for the 9975 shipping package based on the surveillance data collected since 2005 when the 9975 Storage and Surveillance Program began. The Program has demonstrated that the 9975 package has a robust design that can perform under a variety of conditions. The primary emphasis of the on-going 9975 Storage and Surveillance Program is an aging study of the 9975 Viton{reg_sign} containment vessel O-rings and the Celotex{reg_sign} fiberboard thermal insulation at bounding conditions of radiation, elevated temperatures and/or elevated humidity.« less
  • 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. 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) facilitymore » 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. This paper describes a methodology and the analysis results that meet the design limits of the 9975 component and demonstrate the robustness of the 9975 package.« less
  • Three 9975 packages have been instrumented and exposed to bounding storage conditions to help identify the extent to which laboratory test results for fiberboard, O-rings and other components apply within a full-scale package. To date, changes observed in the fiberboard overpack and Oring seals are generally consistent with the behavior of laboratory samples. The lead shield within each package has developed a corrosion layer of lead carbonate, consistent with other 9975 packages. However, the morphology of the corrosion layer is different within these packages, possibly as a result of the severity of the conditioning environments beyond normal service conditions. Conditioningmore » of the second package, LE2, has been discontinued due to the degree of degradation of the fiberboard, and its components have received a final examination. Additional testing will be performed on samples removed from the fiberboard assembly to verify its final condition. The other two packages will continue in test. This is an interim status report for experiments carried out per Task Technical Plan WSRC-TR-2005-00014 [1], which is part of the comprehensive 9975 package surveillance program [2]. The primary goal of this task is to validate aging models currently under development based on lab scale testing of the fiberboard overpack and containment vessel O-rings. A secondary goal is to examine the behavior of the lead shielding under bounding conditions. This task provides an integrated assessment of the package response to environmental extremes, and demonstrates the extent to which data from small samples scale up to a full package. Three 9975 packages have been modified to provide instrumentation for monitoring package response and performance to environmental aging. Each package has a different environmental exposure history.« less