MIL-PRF-49293B
3.6.13 Explosive Atmosphere. The equipment should not cause ignition of an ambient-
explosive-gaseous mixture with air when operating in such an atmosphere. (See 4.6.13).
3.7 Nuclear Survivability. The AN/PDR-75 should be subjected to the nuclear
environmental conditions specified in EL-CP-5111-0002A. The reader should be
energized during exposure. The AN/PDR-75 should meet the specified performance after
being subjected to the nuclear environment (See 4.7).
3.7.1 Electromagnetic Pulse (EMP). The AN/PDR-75 should be placed within a long
wire electromagnetic pulse facility or its equivalent in the following orientations:
a. Power cables extend parallel to the electric field and perpendicular to the magnetic
field; all individual units under the long wire, but widely separated.
b. Power cables coiled on the ground; all units centrally located under the long wire.
Test data should satisfy the EMP requirements in accordance with EL-CP-5111-
0002A (See 4.7.1).
3.7.2 Thermal Radiation. The AN/PDR-75 should be subjected to the thermal radiation
levels specified in EL-CP-5111-0002A without damage. Since the available simulation
facilities provide these thermal radiation levels only over relatively small areas, many
individual exposures will be required so that each of the exposed surfaces (case, meters,
knobs cables, and other outboard components) will receive the required thermal
exposure. The AN/PDR-75, when so exposed, should show no degradation and should
meet specified performance (See 4.7.2).
3.7.3 Nuclear Air Blast. The AN/PDR-75 should be placed in a nuclear air blast
simulation facility and exposed to the air blast environment as specified in EL-CP-5111-
0002A. The reader should meet the specified performance following this test (See 4.7.3).
3.7.4 Initial Nuclear Radiation. The complete reader should be exposed to a LINAC and a
pulsed or fast burst reactor in such a manner that all electronic piece parts and circuits in
the set receive the neutron and gamma doses and rates specified in EL-CP-5111-0002A.
The reader should meet specified performance of 3.5.1 and 3.5.2 (See 4.7.4).
3.7.5 Nuclear, Biological and Chemical Environment. The equipment should be such as
to minimize contamination by chemical or biological agents or radioactive contaminants.
The equipment should be readily capable of decontamination with minimum effect on its
proper operation.
3.7.6 Nuclear Contamination Survivability. The AN/PDR-75 should be capable of being
decontaminated to a negligible risk level for unprotected personnel operating the
equipment with a maximum exposure of 12 hours. A decontamination must result in a
particle reduction of at least 2.5:1 using zinc sulfide FP simulant. The AN/PDR-75 must
be capable of enduring five contamination/decontamination cycles without degradation in
performance (see 4.10.1.3).
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