Nitrate Diffusional Releases from the Saltstone Facility, Vault 2, with Respect to Different Concrete Wall Thicknesses

ROBERT, HIERGESELL

Savannah River Site (S.C.)

关键词: Concretes;    Diffusion;    Design;    12 Management Of Radioactive Wastes, And Non-Radioactive Wastes From Nuclear Facilities;    Nitrates;   

DOI  :  10.2172/839548
RP-ID  :  WSRC-TR-2005-00063
RP-ID  :  AC09-96SR18500
RP-ID  :  839548

美国|英语

来源: UNT Digital Library

【 摘 要 】

To assist the Saltstone Vault 2 Design Team, an investigation was conducted to evaluate the effectiveness of alternative concrete wall thicknesses in limiting nitrate diffusion away from the planned facility. While the current design calls for 18-inch concrete walls, alternative thicknesses of 12-in, 8-in, and 6-in were evaluated using a simplified 1-D numerical model. To serve as a guide for Saltstone Vault 2 conceptual design, the results of this investigation were applied to Saltstone Vault 4 to determine what the hypothetical limits would be for concrete wall thicknesses thinner than the planned 18-inches. This was accomplished by adjusting the Vault 4 Limits, based on the increased nitrate diffusion rates through the thinner concrete walls, such that the 100-m well limit of 44 mg/L of nitrate as nitrate was not exceeded. The implication of these preliminary results is that as thinner vault walls are implemented there is a larger release of nitrate, thus necessitating optimal vault placement to minimize the number of vaults placed along a single groundwater flow path leading to the discharge zone.