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U.S. Department of Energy
Office of Scientific and Technical Information

Basic data report for Drillhole WIPP 28 (Waste Isolation Pilot Plant - WIPP)

Technical Report ·
OSTI ID:5964409
WIPP 28 was drilled in Nash Draw (NE 1/4, sec. 18, T.21S., R.31E.) in Eddy County, New Mexico, to determine subsurface stratigraphy and examine dissolution features above undisturbed salt in the Salado Formation. Determination of dissolution rates will refine previous estimates and provide short-term (geologically) rates for WIPP risk assessments. The borehole encountered, from top to bottom, Mescalero caliche (12 ft with fill material for pad), Dewey Lake Red Beds (203 ft), Rustler Formation (316 ft), and the upper 270 ft of the Salado Formation. A dissolution residue, 58 ft thick, is at the top of the Salado Formation overlying halite-rich beds. In addition to obtaining nearly continuous core from the surface to total depth (801 ft), geophysical logs were taken to measure acoustic velocities, density, radioactivity, and formation resistivity. An interpretive report on dissolution in Nash Draw will be based on combined borehole basin data, surface mapping, and laboratory analyses of Nash Draw rocks and fluids. The WIPP is to demonstrate (through limited operations) disposal technology for transuranic defense wastes and to then be converted to a repository. The WIPP will also provide research facilities for interactions between high-level waste and salt.
Research Organization:
Sandia Labs., Albuquerque, NM (USA); Geological Survey, Denver, CO (USA)
DOE Contract Number:
EY-76-C-04-0789
OSTI ID:
5964409
Report Number(s):
SAND-79-0282
Country of Publication:
United States
Language:
English