A review of relevant methodologies based on Influence Diagrams (IDs), Decision Trees (DTs), and Containment Event Trees (CETs) was conducted to assess the practicality of these methods for the selection of effective strategies for Severe Accident Manageme...

A review of relevent methodologies based on Influence Diagrams (IDs), Decision Trees (DTs), and Containment Event Trees (CETs) was conducted to assess the practicality of these methods for the selection of effective strategies for Severe Accident Manageme...

In this paper, the influence diagram, a new analytical tool for developing and evaluating severe accident management strategies, is presented. Influence diagrams are much simpler than decision trees because they do not lead to the large number of branches that are generated when decision trees are used in realistic problems; ...

It is described the radiation contamination of territory of the Republic of Belarus in 1996 as result of the Chernobyl NPP accident. The maps and diagrams showing a radiation situation in the republic are given. 24 figs.

This website provides a brief report on the nuclear accident at Three Mile Island in Pennsylvania in 1979. It summarizes the events leading to the accident, the resulting health effects, and the accident�s impact on the regulation of nuclear power reactors in the United States. It also provides a chronology of events related to the ...

This paper presents a new approach for developing and assessing severe accident management strategies under uncertainty in nuclear power plants. The strategy of flooding the reactor cavity during the TMLB{prime} sequence as a means to prevent vessel breach is used as an example. The modeling of complex decision problems, such as those encountered in severe ...

This report is the final result of the PROB-SAM project which intends to explore PROBabilistic techniques in modelling Severe Accident Management (SAM) strategies. It presents and analyses a mixed Influence Diagram/Decision Tree (ID/DT) model to evaluate ...

In this paper we present information that can be used in severe accident management by providing an improved understanding of the effects of water addition to a degraded core. This improved understanding is developed using a diagram showing a sequence of core damage states. Whenever possible, a temperature and a time after accident ...

In this paper we present information that can be used in severe accident management by providing an improved understanding of the effects of water addition to a degraded core. This improved understanding is developed using a diagram showing a sequence of core damage states. Whenever possible, a temperature and a time after accident ...

This article addresses the aftermath of the nuclear accident at Chernobyl in the Ukraine. It describes and explains the accident. The article also examines the type of reactor at Chernobyl and expresses concern about future accidents with similar Soviet�designed reactors in Eastern Europe. In addition, it analyzes the health effects, ...

This collection of 17 papers discusses emergency planning during the mid�eighties to the mid�nineties for accidents at nuclear power plants. Topics include atmospheric dispersion of radioactivity, characteristics of severe accidents, emergency action levels (EALs), medical responses, making decisions in a crisis, preparatory information programs, ...

This report provides support in developing an accident prediction event tree diagram, with an analysis of the baseline design concept for the retrieval of emplaced spent unreprocessed fuel (SURF) contained in a degraded Canister. The report contains an evaluation check list, accident logic diagrams, ...

The document reports on the development of an illustrative generic standard for controlling hot surfaces associated with certain categories of consumer products. The development includes evaluations of accident data, fault-tree diagrams, theoretical heat-...

The Events and Causal Factors (E and CF) chart (or diagram) depicts in logical sequence the necessary and sufficient events and causal factors for accident occurrence. It can be used not only to analyze the accident and evaluate the evidence during investigation, but also can help validate the accuracy of preaccident systems analyses. ...

Various ship accidents which have the potential of causing damage to the nuclear power systems of the nuclear powered Ultra Large Crude Carrier (ULCC) are identified. For each ship accident, an event tree is developed which shows the possible causal relationship between ship accident and derangement of nuclear safety-related systems. ...

This book documents and analyzes 36 accidents involving U.S. nuclear weapons that occurred between 1950 and 1980, compilied from declassified Aircraft Accident Reports, Explosive Ordinance Disposal Reports, U.S. Department of Defense (DOD) reports, memoranda, and other primary sources. Each of the books chapters describes a specific ...

This book is a narrative of the accident at the nuclear plant Three Mile Island. On March 28, 1979, the nuclear power plant known as Three Mile Island near Harrisburg, Pennsylvania suffered significant damage due to equipment malfunction, design related problems and worker errors. Ira Rosen, a young reporter, and Mike Gray, an engineer, worked together to create a factual ...

This book is a compilation of data and information gathered from the American Chemical Society�s Division of Nuclear Chemistry and Technology symposium on the nuclear accident at Three Mile Island. The three sessions of the symposium dealt with a thorough description of the accident, the related chemical aspects, and the process of recovery, ...

This work explores the hypothesis that Service Difficulty Reports (SDR - primarily inspection reports) are related to Accident Incident Data System (AIDS - reports primarily compiled from National Transportation Safety Board (NTSB) accident investigations). This work sought and found relations between equipment operability reported in the SDR and aviation ...

A new approach is presented for evaluating the uncertainties inherent in severe accident management strategies. At first, this analysis considers accident management as a decision problem (i.e., applying a strategy compared with do nothing) and uses an influence diagram. To evaluate imprecise node probabilities in the influence ...

A framework for assessing severe accident management strategies is presented using a new analytical tool, namely, influence diagrams. This framework includes multiple and sequential decisions, sensitivity analysis, and uncertainty propagation, and is applied to a proposed set of strategies for a pressurized water reactor station blackout sequence. The ...

Over the last two decades a growing interest for risk analysis has been noted in the industries. The ARAMIS project has defined a methodology for risk assessment. This methodology has been built to help the industrialist to demonstrate that they have a sufficient risk control on their site. Risk analysis consists first in the identification of all the major accidents, assuming ...

The occurrence of severe accidents in commercial nuclear power plants is forecast. A Random Escalation Model (REM) is proposed that uses accident data of both high and low levels of severity to forecast the most-severe ones, which are viewed as escalations of low-severity accidents. Information from safety studies is coherently ...

... transformation and composition of diagrams The diagrams represent abstractions of the ... is constructed with the help of diagram transformation and ...