MIL-STD-398 Shields, Operational For Ammunition Operations, Criteria For Design Of And Tests For AcceptanceThis standard establishes minimum design criteria and test methods for acceptance of operational shields developed to protect personnel and assets from accidental or intentional detonation of explosives during ammunition surveillance, maintenance, modification, renovation and demilitarization operations or ammunition loading operations as defined in paragraph V1.E9.3.1.1 of DoDM 6055.09-M.

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MIL-STD-398A

METHOD 101

5.1.2  When testing is conducted in the open air, position blast gages around the shield in two or three concentric circles at distances where it is expected that overpressures of interest will be found.  Stagger the gages so shock waves reaching the outer circles are not distorted by gages in the inner circle.  The gages shall be placed at a height of 65 inches (1.65 meters).

5.2  Test procedure.

5.2.1  All instrumentation shall be within calibration at time of test.

5.2.2  If the shield is designed for use with more than one model or type of ammunition, select the item that would produce a maximum overpressure.

5.2.3  Apply an overload equal to 25 percent or more of the filler weight of the ammunition item selected for the test, unless otherwise directed in an approved test plan.

5.2.4  All major explosive components should be fused separately, to insure simultaneous detonation or deflagration, in order to simulate the maximum credible incident, unless otherwise directed in an approved test plan.

5.2.5  Function explosives and record overpressure readings.

5.2.6  Prepare pressure-distance plots from overpressure recordings.

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