DOSIMETRY MODELING FOR PREDICTING RADIOLYTIC PRODUCTION AT THE SPENT FUEL-WATER INTERFACE

Miller, W.H.

United States. Department of Energy. Yucca Mountain Project Office.

关键词: Production;    Oxidizers;    Decay;    Radiolysis;    Water;   

DOI  :  10.2172/884898
RP-ID  :  NA
RP-ID  :  NA
RP-ID  :  884898

美国|英语

来源: UNT Digital Library

【 摘 要 】

The radiolysis of water in contact with spent nuclear fuel (SNF) will produce oxidants and reductants that can affect the dissolution of the fuel in a geologic disposal site. These products are created by initial radiolytic species which are a function of the type of radiation being emitted by the SNF, i.e. alpha, beta and/or gamma, as well as the energy of this radiation, the fuel grain size (and resulting surface-to-volume ratio) and the fuel-to-water ratio. These products interact with the surface of the fuel, creating new species and ultimately affecting the dissolution rate. The objective of the work reported here is to develop a systematic dosimetry model to determine the dose to water from the SNF as a function of these variables. This dose is calculated for different radiation types as a function of decay for the average fuel composition expected at Yucca Mountain. From these dose calculations the production rate of initial radiolytic products can be estimated. This data provides the basis for subsequent determination of the resulting chemical interactions at the fuel/water interface predicted by published theoretical and experimental data.