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Title: First quarter report of temperature measurements during the heating phase of the drift-scale test

Abstract

No abstract prepared.

Authors:
Publication Date:
Research Org.:
LLNL (US)
Sponsoring Org.:
USDOE Office of Civilian Radioactive Waste Management, Washington, DC (US)
OSTI Identifier:
16728
Report Number(s):
UCRL-ID-131014
ON: DE98057898; TRN: US200222%%435
DOE Contract Number:
W-7405-Eng-48
Resource Type:
Technical Report
Resource Relation:
Other Information: Supercedes report DE98057898; PBD: 01 Jun 1998; PBD: 1 Jun 1998
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; HEATING; TEMPERATURE MEASUREMENT; LAWRENCE LIVERMORE NATIONAL LABORATORY

Citation Formats

Blair, S., LLNL. First quarter report of temperature measurements during the heating phase of the drift-scale test. United States: N. p., 1998. Web. doi:10.2172/16728.
Blair, S., LLNL. First quarter report of temperature measurements during the heating phase of the drift-scale test. United States. doi:10.2172/16728.
Blair, S., LLNL. Mon . "First quarter report of temperature measurements during the heating phase of the drift-scale test". United States. doi:10.2172/16728. https://www.osti.gov/servlets/purl/16728.
@article{osti_16728,
title = {First quarter report of temperature measurements during the heating phase of the drift-scale test},
author = {Blair, S., LLNL},
abstractNote = {No abstract prepared.},
doi = {10.2172/16728},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jun 01 00:00:00 EDT 1998},
month = {Mon Jun 01 00:00:00 EDT 1998}
}

Technical Report:

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  • The Drift-Scale Test (DST) is one of the thermal tests being conducted in the Exploratory Studies Facility (ESF). One of the purposes of the DST is to study, at the ESF, the coupled thermal- mechanical- hydrologic-chemical (TMHC) processes at the repository horizon of the potential high-level nuclear waste repository at Yucca Mountain, Nevada. The objectives, the test design, and the test layouts of the DST are included in the test design report by the Civilian Radioactive Waste Management System Management and Operation (CRWMS M&O) contractors. The configuration of the DST includes a declining observation drift driven mostly east and downwardmore » from main tunnel in the ESF at approximately 2.827 km from the north portal. The downward slope of the observation drift (11.5% to 14.0%) ensures a minimum of 10 m of middle nonlithophysal Topopah Spring tuff as the overburden for the DST. The length of the observation drift is approximately 136 m. At the elevation of the DST crown (nominally 10 m below the upper extent of the middle nonlithophysal Topopah Spring tuff), the connecting drift breaks out to the north from the observation drift 136 m from the main tunnel of the ESF. The connecting drift extends approximately 40 m to the north from the observation drift. A heater drift breaks out westward from the connecting drift at approximately 30 m from the observation drift. The heater drift consists of an 11-m-long entry, which includes a plate-loading niche, and a 47-m-long heated drift. The nominal diameter of the drifts is 5 m. The detail configuration of the DST, including diagrams showing the drift and borehole layout, is included in the test design report by CRWMS M&O contractors.« less
  • The chemistry boreholes of the Drift Scale Test (DST) have been designed to gather geochemical information and assess the impact of thermal perturbations on gas and liquid phases present in pore spaces and fractures within the rock. There are a total of ten boreholes dedicated to these chemical studies. Two arrays of five boreholes each were drilled from the access/observation drift (AOD) in planes which run normal to the heater drift and which are located approximately 15 and 45% of the way along the length of the drift as measured from the bulkhead. The boreholes each have a length ofmore » about 40 meters and have been drilled at low angles directed just above or just below the heater plane. In each array, three boreholes are directed at increasingly steeper angles (< 25-) above the line of wing heaters and two are directed at shallow angles below the wing heater plane.« less
  • This research has two primary objectives. The first is to determine the extent of cost-savings resulting from the use of centralized collectors for space conditioning as compared to collectors mounted on individual structures. The second objective is to investigate the expected market penetration rates of these two alternatives. Meteorological data to be used as input for computer simulation runs has been collected. A model for analysis of the costs and benefits of energy conservation techniques has been formulated. A linear program model has been structured to allow examination of the optimum combination of solar energy technology, energy conservation, and conventionalmore » fuel space conditioning.« less
  • This is the first of three planned quarterly Technical Reports of 1996 system performance and major project activities. The final quarter will be discussed in the 1996 Progress Report. Activity for the PVUSA project was curtailed considerably, pending resolution of the transfer of management to the California Energy Commission (CEC) and the Sacramento Municipal Utility District (SMUD). Principal activities during the first quarter of 1996 included: (1) Continued negotiations regarding the transfer of project management from PG&E to the joint CEC/SMUD team. Primary remaining hurdle is obtaining approval from the California Public Utilities Commission. (2) Provided training to CEC andmore » SMUD project team members on January 8, 9, and 11. Training covered site operations including data acquisition. (3) Completed the draft of the 1995 Progress Report. (4) Supported the contractor in their efforts for enhancing the performance and reliability of the Amonix EMT-3 array at Davis. (5) Reviewed the PSCo installation drawings, and started activities to provide the PVUSA DAS equipment, (6) Operation and maintenance of existing systems, including data collection and reporting. Data were collected for 19 completed systems with a combined capacity of 1,800 kW. Combined, these systems generated nearly 1.1 million kWh during January through March. The project`s cumulative generation now stands at 8.2 million kWh. Key cumulative 1996 results are listed in the following table. The locations of systems other than Davis are noted alongside the supplier`s name.« less