9975 SHIPPING PACKAGE LIFE EXTENSION SURVEILLANCE PROGRAM RESULTS SUMMARY Page: 5 of 27
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SRNS-STI-2010-00763
Rev. 0
Summary
Results from the 9975 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 Materials Storage (KAMS) facility from 10 years to 15 years. This
justification is established with the stipulation that surveillance activities will continue
throughout this extended time to ensure the continued integrity of the 9975 materials of
construction and to further understand the currently identified degradation mechanisms.
The current 10 year storage life was developed [1] prior to storage. A subsequent report
[2] was later used to extend the qualification of the 9975 shipping packages for 2 years
for shipping plus 10 years for storage. However the qualification for the storage period
was provided by the monitoring requirements of the 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
surveillance program began.
KAMS is a zero-release facility that depends upon containment by the 9975 to meet
design basis storage requirements. Therefore, to confirm the continued integrity of the
9975 packages while stored in KAMS, a 9975 Storage and Surveillance Program was
implemented alongside the DOE required Integrated Surveillance Program (ISP) for 3013
plutonium-bearing containers. The 9975 Storage and Surveillance Program performs
field surveillance as well as accelerated aging tests to ensure any degradation due to
aging, to the extent that could affect packaging performance, is detected in advance of
such degradation occurring in the field. The Program has demonstrated that the 9975
package has a robust design that can perform under a variety of conditions. As such the
primary emphasis of the on-going 9975 Surveillance Program is an aging study of the
9975 Viton GLT containment vessel O-rings and the Celotex fiberboard thermal
insulation at bounding conditions of radiation and elevated temperatures. Other materials
of construction, however, are also discussed.
Introduction
The K-Area Complex (KAC) stores 9975 packages with 3013 containers in KAMS.
These packages were loaded as early as 2001 at the Rocky Flats Environmental
Technology Site (RFETS) in compliance with the 9975 SARP and Certificate of
Compliance (CoC). The earliest leak test dates were during 2000. The acceptance of
these packages beyond their annual maintenance is based on [3] and a surveillance
program was put in place to provide materials performance projections.
All 9975 shipping packages containing a 3013 selected for DE or NDE are non-
destructively examined when the 3013 undergoes surveillance. Field surveillance
activities of the 9975 shipping packages began in FY05 and are currently performed in
KAC. The destructive examination (DE) of one 9975 shipping package per year also
began in FY05. Destructive examinations and material testing are performed at the5 of 27
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Daugherty, W.; Dunn, K.; Hackney, B.; Hoffman, E. & Skidmore, E. 9975 SHIPPING PACKAGE LIFE EXTENSION SURVEILLANCE PROGRAM RESULTS SUMMARY, report, January 6, 2011; United States. (https://digital.library.unt.edu/ark:/67531/metadc837187/m1/5/: accessed April 25, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.