Analysis of radioactive gas generated by the AGN-201 reactor at the United States Naval Postgraduate School
Grissom, Charles C.
Riggin, John D.
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The principal radioactive constituents of the core gas generated by the AGN-201 reactor at'the United States Naval Postgraduate School were ide~tified by an ~nalysis of the I spectrum of the emitted gamm~-rays and by half-l ife ~nalysis·. Also the absolute activities at various times following gener- ation were determined. A scintill~tion ~pectrometer with a gating capability was u~ed. Only !hose radioisotopes still "iexisting in si'gnificant quantities twelve hours after gener- ation were identified since sampling the gas at an earlier time was, for the most part, impractical. The results indicate that the radioisotopes Xe l33 and Xe l35 are the only ones present in significant quantities. Their combined specific activities varied from 1.7 x 10-1 to 1.3 x 10T2 microcuries p~r cc of gas depending upon the age of the gas. It was determined that an upper limit of approximately 0.2% of the activity might be due to the presence of radioactive iodine.