 | | Mechanics of Solids
A Journal of Russian Academy of Sciences | | Founded
in January 1966
Issued 6 times a year
Print ISSN 0025-6544
Online ISSN 1934-7936 |
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| V. A. Grigor'ev, "Application of probabilistic methods of fracture mechanics to the risk analysis of violation of safety criteria for a reactor facility," Mech. Solids. 41 (2), 101-112 (2006) |
| Year |
2006 |
Volume |
41 |
Number |
2 |
Pages |
101-112 |
| Title |
Application of probabilistic methods of fracture mechanics to the risk analysis of violation of safety criteria for a reactor facility |
| Author(s) |
V. A. Grigor'ev (Moscow) |
| Abstract |
In the world practice of justification of strength, reliability, and
safety of power units, the techniques associated with the
determination of the risk of violation of the safety criteria for
these units have been developed. In Russia, the concept of risk has
been involved in the Law of the Russian Federation "On Technical
Regulation". In the present paper, the risk of the violation of the
safety criteria for a reactor facility is defined as the product of
the probability of the failure or the critical state (initiation
event) of the reactor facility equipment by the conditional
probability of the violation of the safety criteria (consequences),
provided that the initiation event has occurred.
The creation and application of methods associated with the concept of risk for
the power unit operation safety analysis leads to the classification of the
reactor facility equipment according to the probability of the influence of the
initiation events on the safety of this facility, i.e., the equipment should be
classified according to a measure of the risk of the safety violation. In this
connection one can consider the influence of failures and the critical state of
the equipment on the violations of the safety criteria threatening with the
destruction of the reactor's body, major damage of the core region,
radioactivity release beyond the containment shell, and the radioactive
contamination of the environment.
In the methodology based on the concept of risk, especially important are the
problems related to the development of defects in the metal of the equipment
and pipelines. The current paper presents the basic principles of the
application of the probabilistic methods of fracture mechanics for the
reliability analysis of the equipment and the evaluation of the risk of the
safety criterion violation for the reactor facility. These principles are
developed for the analysis of the probability of failure of the reactor's body
and heat exchanger pipes in a steam generator. |
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|
| Received |
25 November 2005 |
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