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Inflow measurements on the D-holes at the Stripa mine

Technical Report:

Abstract

Flow measurements in 0.5 m-sections in the D-boreholes at Stripa were performed by Swedish Geological Company during February to April 1991. The purpose of the measurements was to determine in detail the inflow to an array of boreholes through an undisturbed volume of fractured granite. A lower measurement limit of 1x10{sup -4} l/min was stipulated for the measurements in 0.5 m-sections. However, in practice the inflow measurements were initially performed in 4.5 m-sections, which made it possible to reach an even lower measurement limit. Furthermore, by this method the tests were speeded up, because in all 4.5 m-sections where the flow fell below 1x10{sup -4} l/min, no detailed measurements in 0.5 m-sections were necessary. The accuracy of the measurements was 5% for flow in the interval greater than or equal to 1x10{sup -3} l/min and 100% for flow below that value. The boreholes D5 and D6 have relatively high inflows to the entire boreholes, about 450x10{sup -3} l/min respectively 90x10{sup -3} l/min. The inflow values to the remaining boreholes are much lower: between about 3x10{sup -3} and 13x10{sup -3} l/min. The flow distribution along the boreholes is rather similar in boreholes D1, D3 and D6, with flow maxima at about  More>>
Authors:
Danielson, J; Ekman, L; Joensson, S [1] 
  1. SGAB, Uppsala (Sweden)
Publication Date:
Jun 01, 1991
Product Type:
Technical Report
Report Number:
STRIPA-IR-91-15
Reference Number:
SCA: 540250; 052002; PA: AIX-23:010991; SN: 92000637729
Resource Relation:
Other Information: PBD: Jun 1991
Subject:
54 ENVIRONMENTAL SCIENCES; 12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; BOREHOLES; WATER INFLUX; EXPERIMENTAL DATA; FLOW RATE; GEOLOGIC FRACTURES; GROUND WATER; HYDRAULIC CONDUCTIVITY; RADIOACTIVE WASTE DISPOSAL; UNDERGROUND DISPOSAL; 540250; 052002; SITE RESOURCE AND USE STUDIES; WASTE DISPOSAL AND STORAGE
OSTI ID:
10111356
Research Organizations:
Swedish Nuclear Fuel and Waste Management Co., Stockholm (Sweden)
Country of Origin:
Sweden
Language:
English
Other Identifying Numbers:
Other: ON: DE92613496; TRN: SE9100237010991
Availability:
OSTI; NTIS (US Sales Only); INIS
Submitting Site:
SWDN
Size:
135 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Danielson, J, Ekman, L, and Joensson, S. Inflow measurements on the D-holes at the Stripa mine. Sweden: N. p., 1991. Web.
Danielson, J, Ekman, L, & Joensson, S. Inflow measurements on the D-holes at the Stripa mine. Sweden.
Danielson, J, Ekman, L, and Joensson, S. 1991. "Inflow measurements on the D-holes at the Stripa mine." Sweden.
@misc{etde_10111356,
title = {Inflow measurements on the D-holes at the Stripa mine}
author = {Danielson, J, Ekman, L, and Joensson, S}
abstractNote = {Flow measurements in 0.5 m-sections in the D-boreholes at Stripa were performed by Swedish Geological Company during February to April 1991. The purpose of the measurements was to determine in detail the inflow to an array of boreholes through an undisturbed volume of fractured granite. A lower measurement limit of 1x10{sup -4} l/min was stipulated for the measurements in 0.5 m-sections. However, in practice the inflow measurements were initially performed in 4.5 m-sections, which made it possible to reach an even lower measurement limit. Furthermore, by this method the tests were speeded up, because in all 4.5 m-sections where the flow fell below 1x10{sup -4} l/min, no detailed measurements in 0.5 m-sections were necessary. The accuracy of the measurements was 5% for flow in the interval greater than or equal to 1x10{sup -3} l/min and 100% for flow below that value. The boreholes D5 and D6 have relatively high inflows to the entire boreholes, about 450x10{sup -3} l/min respectively 90x10{sup -3} l/min. The inflow values to the remaining boreholes are much lower: between about 3x10{sup -3} and 13x10{sup -3} l/min. The flow distribution along the boreholes is rather similar in boreholes D1, D3 and D6, with flow maxima at about 80-90 m borehole length. At this level peaks are found also in boreholes D2, D4 and D5, but in the latter boreholes increased flow values occur also closer to the borehole outlets. Indications of hydraulic connections between different boreholes were observed. Inflation of the packers at certain locations in one borehole caused in some cases flow changes in neighbouring boreholes. (au).}
place = {Sweden}
year = {1991}
month = {Jun}
}