A Review of Potential Cementing Systems for Sealing and Support Matrices in Deep Borehole Disposal of Radioactive Waste

被引：8
作者：
Collier, Nicholas Charles [1 ]
Milestone, Neil Brennan [2 ]
Travis, Karl Patrick [1 ]
机构：
[1] Univ Sheffield, Dept Mat Sci & Engn, Immobilisat Sci Lab, Deep Borehole Disposal Res Grp, Sheffield S1 3JD, S Yorkshire, England
[2] Callaghan Innovat, 69 Gracefield Rd,POB 31310, Lower Hutt 5040, New Zealand
来源：
ENERGIES | 2019年 / 12卷 / 12期
基金：
英国工程与自然科学研究理事会;
关键词：
deep bore hole disposal; nuclear waste disposal; cementing systems for waste disposal; STRESS CONDITIONS APPLICATION; WELL CEMENT; PORTLAND-CEMENT; CLASS-H; GEOPOLYMER; SLAG; IMMOBILIZATION; TECHNOLOGY; MANAGEMENT; RETARDERS;
D O I：
10.3390/en12122393
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
Cementitious grouts are being developed for use as sealing and support matrices (SSMs) in deep borehole disposal (DBD) where temperatures do not exceed 190 degrees C. They will seal radioactive waste containers into the bottom 2 km of holes drilled up to 5 km deep into the crystalline basement. The temperature and pressure is likely to be similar to those in hydrocarbon and geothermal energy wells, where grout placement and durability are affected. This paper reviews the potential cementing systems suitable for this application and explains why a single solution of a formulation of Class G oil well cement, silica flour, water, fluid loss additive, and retarding admixture has been selected. This type of formulation has been used extensively for over 100 years in well cementing. It should provide the short-term performance and durability required for an SSM, maintaining the seal around the waste packages within the disposal zone long after the boreholes are sealed back to the surface, and thus augmenting the safety case for DBD.
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页数：15
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