Hydraulic testing techniques of deep drill holes at Pahute Mesa, Nevada test site

Abstract

This report is prelim inary and has no t been edi ted fo r co nfo r m i ty with G eologi cal Su rv ey fo r mat and nom enclatu re.

Preliminary hydrogeologic assessment of boreholes UE-25c #1, UE-25c #2, and UE-25c #3, Yucca Mountain, Nye County, Nevada

“…As described by Blankennagel (1967), a tracejector survey involves lowering a logging device below the pumping water level, injecting a slug of radioactive iodine-131 into the well and monitoring the movement of the centroid of the slug between the lower and upper detectors on the logging device. The velocity of flow for the interval between the lower and upper detectors is calculated by dividing the distance between the detectors by the time required for the centroid of the slug to travel from the lower to the upper detector.…”

Geohydrology of test well USW H-3, Yucca Mountain, Nye County, Nevada

“…A borehole-flow survey using a radioactive tracer (Blankennagel, 1967 and1968) was used to measure vertical flow rates in the well, while water was pumped into the well at a rate of 2.7 L/s and with constant head. From this measurement, the zones through which the water flowed from the well and estimated flow rates for the zones were identified.…”

Instrumentation used for hydraulic testing of potential water-bearing formations at the Waste Isolation Pilot Plant site in southeastern New Mexico

“…A detailed discussion of the inflation mechanics may be found in Blankennagel (1967). During packer inflation, the recorders were monitored to determine the instant the test zone was shut-in.…”