Downloaded from https://www.everyspec.com MIL-STD-1311D NEUTRON IRRADIATION 1. Purpose. The purpose of this test is to determine the effect of neutron irradiation on tube characteristics. 2. Test equipment. The test equipment shall be capable of subjecting the tube to the specified intensity and dosage. These values shall be measured and recorded during test. The measurement of the neutron flux (NV) and dosage (NVT) will normally be the responsibility of the reactor personnel. The intensity, NV, or neutron flux is the number of neutrons per square centimeter per second. The dosage, NVT, is the integrated neutron flux or the number of neutrons passing through 1 sq cm in time T. 3. Procedure.
a. The specified end-point test(s) shall be made on the sample. The sample shall be placed in the reactor and subjected to the specified intensity and dosage rate. b. After exposure, tubes are not measured until their residual radiation intensity meets acceptable personnel safety levels. The tubes shall then be retested and shall meet the end-point limit(s) specified on the TSS. c. This test should normally be made only at qualification. METHOD 1046A METHOD 1046A 1046-1 25 March 1970