scholarly journals Pressure Indication of 3013 Inner Containers Using Digital Radiography

2004 ◽  
Author(s):  
S. J. Hensel
Keyword(s):  
Digital Radiography ◽  
Lower Surface ◽  
Department Of Energy ◽  
Storage Container ◽  
Digital Radiography System ◽  
Long Term Storage ◽  
Radiography System ◽  
Bearing Materials ◽  
Non Destructive

Plutonium bearing materials packaged for long term storage per the Department of Energy Standard 3013 (DOE-STD-3013) are required to be examined periodically in a non-destructive manner (i.e. without compromising the storage containers) for pressure buildup. Radiography is the preferred technology for performing the examinations. The concept is to measure and record the container lid position. As a can pressurizes the lid will deflect outward and thus provide an indication of the internal pressure. A radiograph generated within 30 days of creation of each storage container serves as the baseline from which future surveillance examinations will be compared. A problem with measuring the lid position was discovered during testing of a digital radiography system. The solution was to provide a distinct feature upon the lower surface of the container lid from which the digital radiography system could easily track the lid position.

scholarly journals Life Extension of the 9975 Package As a Storage Container: Thermal Analysis

2017 ◽  
Author(s):  
Bereket Kiflu ◽  
Steve J. Hensel
Keyword(s):  
Ambient Temperature ◽  
Temperature Limit ◽  
Department Of Energy ◽  
Life Extension ◽  
Savannah River ◽  
Storage Container ◽  
Long Term Storage ◽  
Years Of Service ◽  
River Site

The 9975 shipping package is used to store plutonium bearing material with a heat release of up to 19 Watts at the Department of Energy (DOE) Savannah River Site (SRS). Individual 9975 packages have been used to store these materials for nearly 15 years. The 9975 package contains non-metallic components such as the elastomeric dual O-ring seals, used to ensure containment at the vessel closures, and a fiberboard over pack which provides impact and fire resistance to the containment vessels. These non-metallic components degrade during long term storage, particularly when higher heat generating contents are packaged. Degraded fiberboard properties result in higher peak internal 9975 package material temperatures during a fire accident event. The thermal performance of the 9975 shipping package was evaluated for a sequential accident consisting of a fire and drop which locally ruptures the outer drum. The package is exposed to an off-normal 58.3°C (137°F) ambient temperature prior to being fully engulfed in a fire for 1.5 hours at 815.6°C (1500°F). Subsequently the fiberboard smolders for 1.0 hour at 760°C (1400°F) at the location of drum rupture, followed by cool down to the ambient temperature. The thermal evaluation considered both the beginning-of-life (as-designed) condition and after 20 years of service as a plutonium material storage container. The results of the evaluation demonstrate that the 9975 shipping package maintains containment during initial and after 20 years of service. The maximum Primary Containment Vessel dual O-ring temperatures during the facility fire-drop-smoldering accident are 163.9°C (327°F) and 186.1°C (367°F) for beginning of life and after 20 years of service, respectively, which are within the allowable accident temperature limit of 204.4°C (400°F). Thus, the 9975 shipping package meets its intended function to provide containment.

CCD-based high resolution digital radiography system for non destructive evaluation

1997 ◽  
Vol 44 (3) ◽  
pp. 885-889 ◽  
Author(s):  
V.V. Nagarkar ◽  
J.S. Gordon ◽  
T.K. Gupta ◽  
S. Vasile ◽  
P. Gothoskar ◽  
...  
Keyword(s):  
High Resolution ◽  
Digital Radiography ◽  
Digital Radiography System ◽  
Non Destructive Evaluation ◽  
Radiography System ◽  
Non Destructive

Thermal Analysis of the 9975 Package Used for Long Term Nuclear Material Storage

2019 ◽  
Author(s):  
David Tamburello ◽  
Matthew Kesterson ◽  
Steven Hensel
Keyword(s):  
Nuclear Material ◽  
Air Gap ◽  
Department Of Energy ◽  
Savannah River ◽  
Long Term Storage ◽  
The Us ◽  
Bearing Materials ◽  
Impact Events ◽  
River Site

Abstract The 9975 is a double containment shipping package used to transport plutonium bearing materials for the US Department of Energy. The 9975 is also used for long term storage of plutonium bearing materials at the Savannah River Site. The package utilizes a fiberboard overpack to protect against fire and impact events. The 9975 has been shown to maintain containment during a hypothetical facility accident fire even though the facility fire is hotter and longer than the regulatory transportation fire. Fiberboard aging and degradation has been investigated using both laboratory and field surveillance data. This information is used to evaluate an aged 9975 used for nuclear material storage. Variations in fiberboard thermal properties due to aging were shown to have modest effects on the maximum component temperatures, while the package geometry variations due to aging and degradation have a larger effect on the maximum component temperatures. Specifically, the air gap between the upper fiberboard assembly and the drum lid increases during storage due to the deterioration of the lower fiberboard assembly and slumping of the package containment vessel. A limiting air gap distance has been determined via thermal fire analysis, which may be used to estimate a storage life.

scholarly journals Welding Plutonium Storage Containers

2004 ◽  
Author(s):  
Stephanie L. Hudlow
Keyword(s):  
Department Of Energy ◽  
Welding Parameters ◽  
Savannah River ◽  
Gas Tungsten Arc ◽  
Long Term Storage ◽  
Bearing Materials ◽  
And Storage ◽  
River Site ◽  
Plutonium Metal

The outer can welder (OCW) in the FB-Line Facility at the Savannah River Site (SRS) is a Gas Tungsten Arc Weld (GTAW) system used to create outer canisters compliant with the Department of Energy 3013 Standard, DOE-STD-3013-2000, Stabilization, Packaging, and Storage of Plutonium-Bearing Materials. The key welding parameters controlled and monitored on the outer can welder Data Acquisition System (DAS) are weld amperage, weld voltage, and weld rotational speed. Inner 3013 canisters from the Bagless Transfer System that contain plutonium metal or plutonium oxide are placed inside an outer 3013 canister. The canister is back-filled with helium and welded using the outer can welder. The completed weld is screened to determine if it is satisfactory by reviewing the OCW DAS key welding parameters, performing a helium leak check, performing a visual examination by a qualified weld inspector, and performing digital radiography of the completed weld. Canisters with unsatisfactory welds are cut open and repackaged. Canisters with satisfactory welds are deemed compliant with the 3013 standard for long-term storage.

Development of a 2,048 x 2,048-Pixel Image Intensifier-TV Digital Radiography System

1992 ◽  
Vol 27 (11) ◽  
pp. 898-906 ◽  
Author(s):  
MUTSUMASA TAKAHASHI ◽  
SUKEYOSHI UENO ◽  
TADATOSHI TSUCHIGAME ◽  
YOSHIHARU HIGASHIDA ◽  
YUKINORI HIRATA ◽  
...  
Keyword(s):  
Digital Radiography ◽  
Image Intensifier ◽  
Digital Radiography System ◽  
Radiography System ◽  
Pixel Image

scholarly journals Analysis of the reproducibility of the gray values and noise of a direct digital radiography system

2015 ◽  
Vol 29 (1) ◽  
pp. 1-5
Author(s):  
Marcelo Lupion POLETI ◽  
Thais Maria Freire FERNANDES ◽  
Renata Cordeiro TEIXEIRA ◽  
Ana Lúcia Alvares CAPELOZZA ◽  
Izabel Regina Fischer RUBIRA-BULLEN
Keyword(s):  
Digital Radiography ◽  
Digital Radiography System ◽  
Radiography System ◽  
Gray Values
Sign in / Sign up

Export Citation Format

Share Document