E-Area Low-Level Waste Facility Cover Overhang Analysis

[摘要] PORFLOW related analyses were performed with a focus on Slit and Engineered Trenches to evaluate the minimum required cover overhang size that would prevent any adverse impact on the ELLWF overall performance. Cover overhang is defined as the lateral distance that a low-infiltration cover extends beyond the edge of the trench unit in any direction. Analyses were carried out for H-3 (short half-life), I-129 (very long half-life), and Sr-90 (moderate half-life with intermediate K_d) at different overhang sizes (5ft, 10ft, 20ft, 50ft, and infinite), cover timing (0yr, 10yr, 20yr, and 30yr), and scenarios (Intact and a limited Dynamic Compaction Case). H-3, I-129 and Sr-90 are representative of nuclides that typically drive the sum-of-fractions for a trench disposal unit.

[发布日期] 2016-05-18

[学科分类] 核能源与工程

[关键词] IODINE 129;STRONTIUM 90;TRITIUM;LOW-LEVEL RADIOACTIVE WASTES;GROUND DISPOSAL;COVERINGS;SIZE;DISTANCE E-Area;Cover Overhang