AREST. Performance Assessment HLRW Repository
- Pacific Northwest Lab., Richland, WA (United States)
AREST was developed to provide a quantitative assessment of the performance of the high-level radioactive waste engineered barrier system and its individual components for a number of repository designs and geologic settings. AREST is a source-term model which simulates the releases from the engineered barrier system (EBS) in natural barriers of the geosphere. It consists of three component models and five process models that describe the post-emplacement environment of a waste package. All of these components are combined within a probabilistic framework. The three component models are a waste package containment (WPC) model that simulates the corrosion degradation processes which eventually result in waste package containment failure, a waste package release (WPR) model that calculates the rates of radionuclide release from the failed waste package, an engineered system release (ESR) model that controls the flow of information among all AREST components and process models and, in particular, combines release output from the WPR model with failure times from the WPC model to produce estimates of total release. The AREST model contains models of the thermal, geochemical, hydrological, mechanical, and radiation processes that determine the waste package environment. AREST provides a menu-based editor, which allows the user to change the input data prior to execution.
- Research Organization:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Sponsoring Organization:
- USDOE Office of Civilian Radioactive Waste Management, Washington, DC (United States)
- DOE Contract Number:
- AC06-76RL01830
- OSTI ID:
- 139409
- Report Number(s):
- ESTSC-000479D078000; NESC-9440
- Resource Relation:
- Other Information: DN: AREST calls the system routine, SECNDS, which returns the current clock time to be used as the seed for the random number generator.; PBD: 1 Jan 1990
- Country of Publication:
- United States
- Language:
- English
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AREST model description
Related Subjects
COMPUTERS
INFORMATION SCIENCE
MANAGEMENT
LAW
MISCELLANEOUS
22 NUCLEAR REACTOR TECHNOLOGY
05 NUCLEAR FUELS
54 ENVIRONMENTAL SCIENCES
A CODES
SOURCE TERMS
HIGH-LEVEL RADIOACTIVE WASTES
COMPUTER PROGRAM DOCUMENTATION
RADIOACTIVE WASTE STORAGE
CONTAINMENT
CORROSION
SPENT FUELS
RADIONUCLIDE MIGRATION