Do not assume that “radiation” here means gamma or neutron. It may mean microwave.
Space Force maintains a 32 MEGAWATT phased array radar there for tracking space objects. My guess is that they’re doing something with it.
operates the AN‐FSY‐3 Space Fence Phased Array Radar, located on Kwajalein Atoll in the Republic of the Marshall Islands. Combined, the two radars track more than 26,000 Near‐Earth and Deep‐Space objects. The 20 SPSS is a geographically separated unit (GSU) of Delta 2, Peterson Space Force Base, Colorado.
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If that’s the case, what are they looking at? Asteroid heading this way? Or Aliennns!!!