The 9977 General Purpose Fissile Package, A Replacement for the 6M Specification Package Page: 3 of 13
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2006 INMM Conference
the contents authorized for the widely used 9975 package. The GPFP is designed to allow
efficient shipment by maximizing the number of packages which can be transported at one time.
Designed to transport more than 1000 A2, the GPFP has successfully passed the regulatory
Hypothetical Accident Condition test sequence, including the very challenging Crush test.
The GPFP design incorporates the proven Chalfant containment vessel design (employed in the 9965,
9968 and 9975 packages). The Chalfant design is leak testable, space efficient and very robust. The
drum and drum closure design has been developed from established practice and has been successfully
Package size and weight are important factors in determining the maximum number of packages which
can be transported in a single shipment. The overall package dimensions have been chosen to allow
efficient packing for transport. The weight of the package has been kept low to maximize the payload per
shipment. For this reason, the GPFP does not incorporate shielding. However, if a particular content
should so require, the large containment vessel (compared to the 2R containment vessel employed by the
6M) can accommodate a shielded "basket" as part of the contents. The ability to accommodate various
basket configurations enables provision of shielding appropriate to the contents being shipped.
The GPFP overpack incorporates feature to facilitate operations and minimize maintenance issues. The
overpack has an easily cleaned liner, should decontamination be necessary. Protection against impact and
fire is provided the annular urethane foam layer. The Crush test is a severe challenge for drum-type
packages. Finite Element Analysis of the sequential HAC tests indicated that adopting urethane foam as
the overpack impact absorbing material would enable the GPFP to withstand the Crush.
The package lid is a single piece, secured with only eight bolts and weighing less than 20 lbs. The lid
consists of a cap filled with ceramic insulation, the bolting flange, and a thick insulated plug that fills the
upper section of the liner, Figure 1.
(8) 5/8" dia.
Bolts Lid Closure
35 Gallon SS
L o a d - - - - - - - - -L o a d
(top & bottom) Fixtures
Estimated Gross Weight 325 lb; Estimated Gross Weight 250 lbs
with a Payload of 100 lb with a Payload of 45 lb
Figure 1. 9977 General Purpose Fissile Package.
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SMITH, ALLEN. The 9977 General Purpose Fissile Package, A Replacement for the 6M Specification Package, report, January 13, 2006; [Aiken, South Carolina]. (https://digital.library.unt.edu/ark:/67531/metadc892013/m1/3/?rotate=180: accessed May 23, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.