Time-dependent accident sequences including human actions

Journal Article · Wed Feb 01 00:00:00 EST 1984 · Nucl. Technol.; (United States)

OSTI ID:6289439

Apostolakis, G; Chu, T L

During an accident, transitions between plant states can occur due to operator intervention and the failure of systems while running. The latter cause of transition is much less likely than the first, which includes errors of commission and omission as well as recovery of lost functions. A methodology has been developed to model these transitions in the time domain. As an example, it is applied to the analysis of Three-Mile-Island-type accidents. Statistical evidence is collected and used in assessing the frequency of stuck-open power-operated relief valves at Babcock and Wilcox plants as well as the frequency of misdiagnosis. Statistical data are also used in modeling the timing of operator actions during the accident, i.e., turning off and on the high-pressure injection system and closing the block valves.

• Research Organization: Univ. of California School of Eng. and Applied Science, Los Angeles, CA
• OSTI ID: 6289439
• Journal Information: Nucl. Technol.; (United States), Vol. 64:2
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
REACTOR ACCIDENTS
HUMAN FACTORS
STATISTICAL MODELS
RELIEF VALVES
SYSTEM FAILURE ANALYSIS
ERRORS
REACTOR OPERATORS
TIME DEPENDENCE
ACCIDENTS
CONTROL EQUIPMENT
EQUIPMENT
FLOW REGULATORS
MATHEMATICAL MODELS
PERSONNEL
SYSTEMS ANALYSIS
VALVES
220900* - Nuclear Reactor Technology- Reactor Safety