Modeling fluid-rock interaction at Yucca Mountain, Nevada; A progress report, April 15, 1992
Volcanic rocks at Yucca Mountain, Nevada aie being assessed for their suitability as a potential repository for high-level nuclear waste. Recent progress in modeling fluid-rock interactions, in particular the mineralogical and chemical changes that may accompany waste disposal at Yucca Mountain, will be reviewed in this publication. In Part 1 of this publication, ``Geochemical Modeling of Clinoptilolite-Water Interactions,`` solid-solution and cation-exchange models for the zeolite clinoptilolite are developed and compared to experimental and field observations. At Yucca Mountain, clinoptilolite which is found lining fractures and as a major component of zeolitized tuffs, is expected to play an important role in sequestering radionuclides that may escape from a potential nuclear waste repository. The solid-solution and ion-exchange models were evaluated by comparing predicted stabilities and exchangeable cation distributions of clinoptilolites with: (1) published binary exchange data; (2) compositions of coexisting clinoptilolites and formation waters at Yucca Mountain; (3) experimental sorption isotherms of Cs and Sr on zeolitized tuff, and (4) high temperature experimental data. Good agreement was found between predictions and expertmental data, especially for binary exchange and Cs and Sr sorption on clinoptilolite. Part 2 of this publication, ``Geochemical Simulation of Fluid-Rock Interactions at Yucca Mountain,`` describes preliminary numerical simulations of fluid-rock interactions at Yucca Mountain. The solid-solution model developed in the first part of the paper is used to evaluate the stability and composition of clinciptilolite and other minerals in the host rock under ambient conditions and after waste emplacement.
- Research Organization:
- Lawrence Livermore National Lab., CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 138469
- Report Number(s):
- UCRL-ID--109921; ON: DE92041080
- Country of Publication:
- United States
- Language:
- English
Similar Records
Modeling cation exchange using EQ3/6
Ion exchange and dehydration effects on potassium and argon contents of clinoptilolite
Geochemical investigations related to the Yucca Mountain environment and potential nuclear waste repository
Conference
·
Sat Aug 01 00:00:00 EDT 1992
·
OSTI ID:139661
Ion exchange and dehydration effects on potassium and argon contents of clinoptilolite
Technical Report
·
Sat Dec 30 23:00:00 EST 1995
·
OSTI ID:212416
Geochemical investigations related to the Yucca Mountain environment and potential nuclear waste repository
Technical Report
·
Mon Oct 31 23:00:00 EST 1994
·
OSTI ID:60781