Nevada Nuclear Waste Storage Investigations Project Plan


Book Description

This project plan for the Nevada Nuclear Waste Storage Investigations (NNWSI) Project has been developed in order to define the scope, the objectives, and the management requirements of the project. The plan lists the technical, management, cost, schedule, and institutional objectives of the NNWSI project; presents a technical plan that reflects the newly defined uniform work breakdown structure for the Office of Geologic Repositories; summarizes the management approach and acquisition strategy; and briefly discusses the principal risks associated with the projected costs through the completion of the development and evaluation phase; discusses the schedule for the NNWSI Project and the factors that may affect it directly or indirectly; and briefly reviews the controlled items for the project. The NNWSI Project Plan is a supporting document to the Geologic Repository Project Plan.







Technical Correspondence in Support of the Site Characterization Plan


Book Description

This document is composed of two technical memorandums containing information that has been referenced in the Site Characterization Plan for the Nevada Nuclear Waste Storage Investigations (NNWSI) Project. The NNWSI Project is characterizing the Yucca Mountain site on the Nevada Test Site (NTS) to study the feasibility of constructing a high-level waste repository in the Topopah Spring Member of the Paintbrush Tuff. The information pertains to the following subject areas: (1) the potential for thermal degradation of the Topopah Spring Tuff; and (2) updated data analysis for Goodman Jack tests performed in G-tunnel on the NTS.










Sealing of Boreholes and Underground Excavations in Rock


Book Description

Sealing of boreholes and underground excavations has not received much engineering attention until fairly recently. The growing awareness of and sensitivity to environmental concerns of the technical community as well as of the public at large has resulted in an increasing recognition of the fact that these geological penetrations may have an environmental impact. The issue of possible contamination resulting from migration along boreholes, adits, shafts or tunnels unquestionably has been raised most forcefully with in the context of nuclear waste disposal. Several nuclear waste disposal programs, notably the Civilian and the Defence programs of the US De partment of Energy, the US Nuclear Regulatory Commission and the Canadian and Swedish radioactive waste disposal programs have conducted major research efforts aimed at developing adequate seal designs for penet rations in host rock formations for high-level nuclear waste repositories. While a considerable data base has been gathered over the last two decades or so with regard to the performance of seals, most of the information is presented in research reports and widely scattered papers in journals and proceedings of conferences. Hence, the materials are not readily accessible to potential users such as designers, contractors or regulators who are not familiar with nuclear waste disposal programs.




Repository Seals Requirements Study


Book Description

The Yucca Mountain Site Characterization Project, managed by the Civilian Radioactive Waste Management System (CRWMS) Management and Operating Contractor (M and O) is conducting investigations to support the Viability Assessment and the License Application for a high-level nuclear waste repository at Yucca Mountain, Nevada. The sealing subsystem is part of the Yucca Mountain Waste Isolation System. The Yucca Mountain Site Characterization Project is currently evaluating the role of the sealing subsystem (shaft, ramp and exploratory borehole seals) in achieving the overall performance objectives for the Waste Isolation System. This report documents the results of those evaluations. This report presents the results of a repository sealing requirements study. Sealing is defined as the permanent closure of the shafts, ramps, and exploratory boreholes. Sealing includes those components that would reduce potential inflows above the repository, or that would divert flow near the repository horizon to allow vertical infiltration to below the repository. Sealing of such features as emplacement drifts was not done in this study because the current capability to calculate fracture flow into the drifts is not sufficiently mature. The objective of the study is to provide water or air flow performance based requirements for shafts, ramps, and exploratory boreholes located near the repository. Recommendations, as appropriate, are provided for developing plans, seals component testing, and other studies relating to sealing.