Year
1989
Abstract
The accident at TMI-2 in March of 1979 generated significant fission products and released fuel bearing materials to the reactor coolant system. Correlations between fission products and fuel debris are used to estimate fuel loadings of waste shipments, and to provide SNM accountability for TMI-2. Similarly, relationships between alpha emitters from transuranics or fuel bearing materials themselves can be used to evaluate uranium quantities within fuel debris. This methodology is being employed to determine fuel loadings of film coatings in selected areas. The OTSG tubes have been measured for bulk fuel debris by gross gamma probing and assayed for fuel film quantification by alpha probing. The alpha probing relates gross alpha emission to uranium content of surface deposits within the steam generator tubes. This correlation has indicated that approximately 90 grams of uranium (U02) are deposited on the inside surface of the 'A' OTSG tubes.