Patent Number: 
Section: claims

1. A radiation area monitor device, comprising:a radiation sensor having a directional radiation sensing capability;a rotation mechanism operable for selectively rotating the radiation sensor such that the directional radiation sensing capability selectively sweeps an area of interest; anda processor operable for analyzing and storing a radiation fingerprint acquired by the radiation sensor as the directional radiation sensing capability selectively sweeps the area of interest;wherein the radiation sensor comprises one or more of a gamma sensor and a neutron sensor. 2. The radiation area monitor device of claim 1, wherein the radiation sensor comprises a dual gamma/neutron radiation sensor. 3. The radiation area monitor device of claim 1, wherein the radiation area monitor device is operable for selectively operating in:a first supervised mode during which a baseline radiation fingerprint is acquired by the radiation sensor as the directional radiation sensing capability selectively sweeps the area of interest; anda second unsupervised mode during which a subsequent radiation fingerprint is acquired by the radiation sensor as the directional radiation sensing capability selectively sweeps the area of interest, wherein the subsequent radiation fingerprint is compared to the baseline radiation fingerprint and, if a predetermined difference threshold is exceeded, an alert is issued. 4. A radiation area monitor method, comprising:providing a radiation sensor having a directional radiation sensing capability;providing a rotation mechanism operable for selectively rotating the radiation sensor such that the directional radiation sensing capability selectively sweeps an area of interest; andanalyzing and storing a radiation fingerprint acquired by the radiation sensor as the directional radiation sensing capability selectively sweeps the area of interest;wherein the radiation sensor comprises one or more of a gamma sensor and a neutron sensor. 5. The radiation area monitor method of claim 4, wherein the radiation sensor comprises a dual gamma/neutron radiation sensor. 6. The radiation area monitor method of claim 4, wherein the radiation area monitor device is operable for selectively operating in:a first supervised mode during which a baseline radiation fingerprint is acquired by the radiation sensor as the directional radiation sensing capability selectively sweeps the area of interest; anda second unsupervised mode during which a subsequent radiation fingerprint is acquired by the radiation sensor as the directional radiation sensing capability selectively sweeps the area of interest, wherein the subsequent radiation fingerprint is compared to the baseline radiation fingerprint and, if a predetermined difference threshold is exceeded, an alert is issued.