Prototype Engineered Barrier System Field Test (PEBSFT); Final report
- ed.
This final report represents a summary of data and interpretations obtained from the Prototype Engineered Barrier System Field Test (PEBSFT) performed in G-Tunnel within the Nevada Test Site. The PEBSFT was conducted to evaluate the applicability of measurement techniques, numerical models, and procedures developed for future field tests that will be conducted in the Exploratory Studies Facilities (ESF) at Yucca Mountain. The primary objective of the test was to provide a basis for determining whether tests planned for the ESF have the potential to be successful. Chapter 1 on high frequency electromagnetic tomography discusses the rock mass electromagnetic permittivity and attenuation rate changes that were measured to characterize the water distribution in the near field of a simulated waste container. The data are used to obtain quantitative estimates of how the moisture content in the rock mass changes during heating and to infer properties of the spatial variability of water distribution, leading to conclusions about the role of fractures in the system. Chapter 2 discusses the changes in rock moisture content detected by the neutron logging probe. Chapter 3 permeability tests discusses the characterization of the in-situ permeability of the fractured tuff around the borehole. The air permeability testing apparatus, the testing procedures, and the data analysis are presented. Chapter 4 describes the moisture collection system installed in the heater borehole to trap and measure the moisture volumes. Chapter 5 describes relative humidity measurements made with the thermocouple psychrometer and capacitance sensors. Chapter 6 discusses gas pressure measurements in the G-Tunnel, addressing the calibration and installation of piezoresistive-gaged transducers. Chapter 7 describes the calibration and installation of thermocouples for temperature measurements. Chapter 8 discusses the results of the PEBSFT.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 138211
- Report Number(s):
- UCRL-ID-106159; ON: DE92000102; TRN: 91:028930
- Resource Relation:
- Other Information: PBD: Aug 1991
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
58 GEOSCIENCES
ROCKS
TESTING
TUFF
PERMEABILITY
PROGRESS REPORT
NEVADA TEST SITE
MEASURING METHODS
MOISTURE
YUCCA MOUNTAIN
TEMPERATURE MEASUREMENT
MEASURING INSTRUMENTS
PRESSURE MEASUREMENT
FRACTURES
BOREHOLES
HYDROLOGY
DATA ANALYSIS
ENGINEERED SAFETY SYSTEMS
HEATERS
WATER VAPOR
THERMOCOUPLES
Yucca Mountain Project