Managing Aging Effects on Dry Cask Storage Systems for Extended Long-Term Storage and Transportation of Used Fuel (REV. 2)

The cancellation of the Yucca Mountain repository program in the Unites States raises the prospect of very long-term storage (i.e., >120 years) and deferred transportation of used fuel at the nuclear power plant sites. While long-term storage of used nuclear fuel in dry cask storage systems (DCSSs) at Independent Spent Fuel Storage Installations (ISFSIs) is already a standard practice among U.S. utilities, recent rule-making activities of the U.S. Nuclear Regulatory Commission (NRC) indicated additional flexibility for the NRC licensees of ISFSIs and certificate holders of the DCSSs to request initial and renewal terms for up to 40 years. The proposed rule also adds a requirement that renewal applicants must provide descriptions of aging management programs (AMPs) and time-limited aging analyses (TLAAs) to ensure that the structures, systems, and components (SSCs) that are important to safety in the DCSSs will perform as designed under the extended license terms. This paper examines issues related to managing aging effects on DCSSs for very long-term storage (VLTS) of used fuels, capitalizing on the extensive knowledge and experience accumulated from the work on aging research and life cycle management at Argonne National Laboratory (ANL) over the last 30 years. The technical basis for acceptable AMPs and TLAAs is described, as are generic AMPs and TLAAs that are being developed by Argonne under the support of the U.S. Department of Energy (DOE) Used Fuel Disposition Campaign for R&D on extended long-term storage and transportation.

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Metal hydride technologies for renewable energy

E3S Web of Conferences ◽

10.1051/e3sconf/201911405005 ◽

2019 ◽

Vol 114 ◽

pp. 05005 ◽

Cited By ~ 1

Author(s):

Alexey Kazakov ◽

Dmitry Blinov ◽

Ivan Romanov ◽

Dmitry Dunikov ◽

Vasily Borzenko

Keyword(s):

Renewable Energy ◽

Energy Storage ◽

Metal Hydride ◽

Storage Systems ◽

Selective Absorption ◽

Hydrogen Energy ◽

Energy Storage Systems ◽

Long Term Storage ◽

Term Storage

Significant progress in the installation of renewable energy requires the improvement of energy production and storage technologies. Hydrogen energy storage systems based on reversible metal hydride materials can be used as an energy backup system. Metal hydride hydrogen storage systems are distinguished by a high degree of safety of their use, since hydrogen is stored in a solid phase, a high volumetric density of stored hydrogen, and the possibility of long-term storage without losses. A distinctive feature of metal hydride materials is the reversible and selective absorption and release of high-purity hydrogen. This paper presents experimental studies of LaNi5-based metal hydride materials with a useful hydrogen capacity of 1.0–1.3 wt.% H2 with equilibrium pressures of 0.025 - 0.05 MPa and 0.1 - 1.2 MPa at moderate temperatures of 295 - 353 K for the hydrogen purification systems and hydrogen long-term storage systems, respectively. The applicability of metal hydride technologies for renewable energy sources as energy storage systems in the form of hydrogen is also shown.

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A simple hermetic sample holder for X-ray diffraction analysis of uranium hydride

Journal of Applied Crystallography ◽

10.1107/s0021889807024661 ◽

2007 ◽

Vol 40 (4) ◽

pp. 796-798 ◽

Cited By ~ 4

Author(s):

Bingyun Ao ◽

Xiaolin Wang ◽

Yongjun Wei ◽

Yanzhi Zhang

Keyword(s):

Diffraction Analysis ◽

Sample Holder ◽

X Ray Diffraction ◽

Aging Effects ◽

X Ray ◽

Long Term Storage ◽

Toxic Materials ◽

First Results ◽

Term Storage

In order to help resolve unknowns regarding aging effects of uranium during long-term storage of tritium, a number of experiments have been carried out by several researchers. However, almost no literature is available on the structural change of uranium tritide, mainly because its high toxicity and air-sensitivity render appropriate experiments very difficult. In this paper, a simple hermetic sample holder that fits the Philips X'Pert Pro X-ray diffractometer is described. It may be used to study the aging effects of uranium tritide during storage. The sample holder mainly consists of an aluminium container for sample storage and a Mylar window for X-ray measurements. This sample holder can also be used with other air-sensitive, radioactive and toxic materials. In this paper, the first results obtained from X-ray diffraction analysis of uranium hydride are presented.

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Maintenance Optimization Model with Sequential Inspection Based on Real-Time Reliability Evaluation for Long-Term Storage Systems

Processes ◽

10.3390/pr7080481 ◽

2019 ◽

Vol 7 (8) ◽

pp. 481 ◽

Cited By ~ 1

Author(s):

Bai ◽

Cheng ◽

Guo

Keyword(s):

Real Time ◽

Storage Systems ◽

Maintenance Optimization ◽

Total Cost ◽

The Real ◽

Cost Rate ◽

Long Term Storage ◽

Critical Unit ◽

Term Storage

For long-term storage systems such as rockets and missiles, most of the relevant models and algorithms for inspection and maintenance currently focus on analysis based on periodic inspection. However, considering factors such as the complexity of the degradation mechanisms of these systems, the constraints imposed by failure risk, and the uncertainty caused by environmental factors, it is preferable to dynamically determine the inspection intervals based on real-time status information. This paper investigates the issue of maintenance optimization modelling for long-term storage systems based on real-time reliability evaluation. First, the Wiener process is used to establish a performance degradation model for one critical unit of such a system, and a closed-form expression for the real-time reliability distribution is obtained by using the first-hitting-time theory. Second, sequential inspection intervals are dynamically determined by combining the real-time reliability function with a real-time reliability threshold for the system. Third, a maintenance optimization model is established for the critical unit based on update process theory. An analytical expression for the expected total cost rate is derived, and then, the real-time reliability threshold and the preventive maintenance threshold for the unit are jointly optimized by means of Monte Carlo simulation, with the lowest expected total cost rate as the optimization goal. Finally, two examples of a gyroscope and an alloy blade that are commonly used in the long-term storage systems are considered, and the validity of the proposed model is illustrated by means of a sensitivity analysis of the relevant parameters.

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A technique for long-term storage of clay samples

Canadian Geotechnical Journal ◽

10.1139/t86-089 ◽

1986 ◽

Vol 23 (4) ◽

pp. 602-605 ◽

Cited By ~ 15

Author(s):

P. La Rochelle ◽

S. Leroueil ◽

F. Tavenas

Keyword(s):

Key Words ◽

Aging Effects ◽

Ph Values ◽

Long Term Storage ◽

Sensitive Clay ◽

Term Storage

This note describes a technique for sealing and storing clay samples so as to prevent aging effects during long periods of storage. It also gives the results of a study carried out on samples stored from 3 to 8 years, which prove the efficiency of that technique; the liquid limits, the liquidity indices, and the pH values remained constant during these long periods of storage. Key words: sensitive clay, storing, sealing, aging.

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СТАН І ПРОБЛЕМИ СТВОРЕННЯ ДНК-ПАМ'ЯТІ

Medical Informatics and Engineering ◽

10.11603/mie.1996-1960.2015.3.4997 ◽

2015 ◽

Author(s):

A. Kryuchyn ◽

Ye. V. Belyak ◽

Ye. A. Kryuchyna ◽

A. V. Potebnya

Keyword(s):

Storage Systems ◽

Dna Molecules ◽

Considerable Potential ◽

Long Term Storage ◽

Term Storage

The results of the analysis of the development of storage systems on DNA molecules are given. The considerable potential for such storage systems for the organization of long-term storage of large volumes of information is shown. The conditions for the extensive use of memory on DNA are determined. It is shown that the key to the use of WORM-type memory on DNA molecules is a significant increase in the speed of sequencing nukleatidov recorded sequences. Data on conditions of storage memory chips on DNA, which provide long-term storage of large volumes of information is presented.

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Modelling of Moisture Movement in Wood during Outdoor Storage

Nonlinear Analysis Modelling and Control ◽

10.15388/na.2001.6.1.15210 ◽

2001 ◽

Vol 6 (2) ◽

pp. 3-14 ◽

Cited By ~ 23

Author(s):

R. Baronas ◽

F. Ivanauskas ◽

I. Juodeikienė ◽

A. Kajalavičius

Keyword(s):

Experimental Data ◽

Finite Difference ◽

Climatic Conditions ◽

Two Dimensional ◽

Moisture Movement ◽

Finite Difference Technique ◽

Long Term Storage ◽

Space Formulation ◽

Term Storage

A model of moisture movement in wood is presented in this paper in a two-dimensional-in-space formulation. The finite-difference technique has been used in order to obtain the solution of the problem. The model was applied to predict the moisture content in sawn boards from pine during long term storage under outdoor climatic conditions. The satisfactory agreement between the numerical solution and experimental data was obtained.

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