Some preliminary considerations from the management of post-accident situations connected to large scale and high land contamination are presented. The return to normal, or at least acceptable living conditions, as soon as reasonably achievable, and the prevention of the possible emergence of a post-accident crisis is of ...

This paper describes the safety research program being carried out by Atomic Energy of Canada Limited (AECL) to provide information on the performance of CANDU-PHW reactors under postulated accident conditions. Key results from this program are presented ...

This overview paper draws together findings from previous focus group research and studies of 100 individual construction accidents. Pursuing issues raised by the focus groups, the accident studies collected qualitative information on the circumstances of each incident and the causal influences involved. Site based data collection entailed interviews with ...

Nuclear power plants are very complex systems. The diagnoses of transients or accident conditions is very difficult because a large amount of information, which is often noisy, or intermittent, or even incomplete, needs to be processed in real time. To demonstrate their potential application to nuclear power plants, neural networks are used to monitor the ...

... § 71.73 Hypothetical accident conditions. (a) Test procedures...Evaluation for hypothetical accident conditions is to be based... Tests for hypothetical accident conditions must be conducted...been assumed for criticality analysis, immersion under a head...

A consistency review of accident analyses in US Department of Energy (DOE) safety, environmental, and emergency planning documents is presented. The range of and key differences in driving assumptions used in accident definition and frequency assessment, radiological source term generation, and atmospheric transport and fate modeling ...

...2010-10-01 false Reporting accidents. 195.50 Section 195.50...HAZARDOUS LIQUIDS BY PIPELINE Annual, Accident, and Safety-Related Condition Reporting § 195.50 Reporting accidents. An accident report is...

... Abstract : Effective communication is key for the successful management of chemical or biological accidents or threats (terrorism). ...

... from 1976 to 1981, examined the relationship between aviation accidents and static ... between certain visual conditions and aircraft accidents (19,20 ...

Appendix B.In-Flight Loss of Control Accidents in Part 121 and Scheduled ... The causal factors of accidents from the National Transportation Safety Board ...

A Five-step methodology has been developed to evaluate information needs for nuclear power plants under accident conditions and the availability of plant instrumentation during severe accidents. Step 1 examines the credible accidents and their relationships to plant safety functions. Step 2 determines the ...

A Five-step methodology has been developed to evaluate information needs for nuclear power plants under accident conditions and the availability of plant instrumentation during severe accidents. Step 1 examines the credible accidents and their relationships to plant safety functions. Step 2 determines the ...

...fissile materials packagings to withstand accident conditions in transportation. 173...fissile materials packagings to withstand accident conditions in transportation. Each...CFR part 71 for ability to withstand accident conditions in...

This document describes a major advance in the technology for calculating source terms from postulated accidents at US light-water reactors. The improved technology consists of (1) an extensive data base from severe accident research programs initiated following the TMI accident, (2) a set of coupled and integrated computer codes (the ...

The Federal Railroad Administration (US DOT) maintains a file of carrier-reported railroad accidents and incidents that meet stipulated threshold criteria for damage cost and/or casualties. A thoroughly-cleaned five-year time series of this data base was subjected to unbiased statistical procedures to discover (a) important causative variables in severe (high damage cost) ...

Two experiments for a small-break loss-of-coolant accident on a pressurizer top were conducted at the Institute of Nuclear Energy Research (INER) Integral System Test (IIST) facility to investigate the thermal-hydraulic behavior of a passive core cooling system (PCCS) in a Westinghouse pressurized water reactor (PWR). The test results are compared with previous IIST tests ...

The management of severe accidents in light water reactors is receiving much attention in several countries. The reduction of risk by measures and/or actions that would affect the behavior of a severe accident is discussed. The research program that is being conducted by the US Nuclear Regulatory Commission focuses on both in-vessel ...

An important goal of the US DOE reactor development program is to conceptualize advanced safety design features for a demonstration Sodium Fast Reactor (SFR). The treatment of severe accidents is one of the key safety issues in the design approach for advanced SFR systems. It is necessary to develop an in-depth understanding of the risk of severe ...

OBJECTIVE: To examine the relationship between benzodiazepine (BZD) use and motor vehicle accidents (MVAs). DATA SOURCES: MEDLINE was searched from 1980 to 1997 using the key words traffic accidents or motor vehicle accidents and benzodiazepines (and alternative terms and outcomes) in English, German, French, or ...

This document provides the technical basis for the frequency of a tank bump and for the radiological and toxicological consequences of a tank boiling accident and associated hazardous conditions.

The main phenomena leading to hydrogen generation in the containment of a PWR in accident conditions are described in this report. They are the following: water radiolysis, zirconium cladding oxidation and oxidation of the aluminium of internal structures...

An analysis of the frequency of four different types of rotorcraft accidents was conducted to determine if the number of fatalities and injuries between accident conditions was different. Accidents involving rollover, no rollover, fire, and no fire were s...

...false Telephonic notice of certain accidents. 195.52 Section 195.52 ...HAZARDOUS LIQUIDS BY PIPELINE Annual, Accident, and Safety-Related Condition Reporting...52 Telephonic notice of certain accidents. (a) At the earliest...

Injury severities in traffic accidents are usually recorded on ordinal scales, and statistical models have been applied to investigate the effects of driver factors, vehicle characteristics, road geometrics and environmental conditions on injury severity. The unknown parameters in the models are in general estimated assuming random sampling from the ...

Transient Reactor Test (TREAT) Facility experiment M2 was performed to evaluate the transient behavior of metal-alloy fuel under accident conditions to investigate the inherent safety features of the fuel in integral fast reactor (IFR) system designs. Objectives were to obtain early information on the key fuel behavior characteristics ...

The thermal response of the H1616 transport container is simulated to demonstrate compliance with the Federal regulations for performance during hypothetical accident conditions (HAC). The goal is to show that tests conducted for the certification of the H1616 shipping container provide conservatively high estimates of temperatures at ...

A key parameter in the calculation of accident dose-risks by the RADTRAN 4 code is the time assigned for evacuation of the affected area surrounding the accident. Currently, in the interest of assured conservatism, this time is set at 24 hrs. Casual anecd...

An important goal of the US DOE reactor development program is to conceptualize advanced safety design features for a demonstration Sodium Fast Reactor (SFR). The treatment of severe accidents is one of the key safety issues in the design approach for adv...

As part of the Severe Accident Risk Reduction Program, researchers at Sandia National Laboratories have constructed a group of containment event trees to be used in the analysis of key accident sequences for light water reactors (LWR) during postulated se...

The report covers an accident delineation study undertaken to organize and evaluate the available information concerning LMFBR accident sequences and to identify key phenomenological and system-response uncertainties. The study can help provide a basis fo...

A consistency review of accident analyses in US Department of Energy (DOE) safety, environmental, and emergency planning documents is presented. The range of and key differences in driving assumptions used in accident definition and frequency assessment, ...

Technical Basis Document for the Nuclear Criticality Representative Accident and Associate Represented Hazardous Conditions. Revision 2 of RPP-12371 provides accident consequence estimates for a hypothetical criticality event in an above grade facility (e...

This paper presents the site suitability source terms for the Modular High Temperature Gas-Cooled Reactor (MHTGR). The MHTGR program has identified a spectrum of accident release scenarios that form a basis for determining the MHTGR site suitability source terms. This basis, consistent with 10CFR100 guidelines, includes an evaluation of a spectrum of ...

... National Park Factors that can contribute to visitor accidents Not relevant ...

... The identification of the true causes of hazardous failures and accidents of technical equipment is the necessary condition for developing and ...

Information is presented concerning the public information chronology; Met Ed public relations; flow of public information during the accident at Three Mile Island; flow of public information on five key events during the accident at Three Mile Island; the journalist's perspective; content analysis of mass media coverage of ...

Information is presented concerning the public information chronology; MET ED public relations; flow of public information during the accident at Three Mile Island; flow of public information on five key events during the accident at Three Mile Island; the journalist's perspective; content analysis of mass media coverage of ...

Types of accidents and violations were compared for 1701 drivers with chronic medical conditions known to the California Department of Motor Vehicles and 921 drivers not known to have medical conditions. Drivers without medical conditions were found to be...

The systematics of the characteristics of twenty-one criticality accidents occurring in nuclear processing facilities of the Russian Federation, the United States, and the United Kingdom are examined. By systematics the authors mean the degree of consistency or agreement between the factual parameters reported for the accidents and the experimentally known ...

An overview of the analysis of core-disruptive accidents is given. These analyses are for the purpose of understanding and predicting fast reactor behavior in severe low probability accident conditions, to establish the consequences of such conditions and to provide a basis for evaluating consequence limiting ...

following the optimism, even hubris, of the 1960s and 1970s. Key factors included: � The accidents at Three

The increasing number of laser surgeons with different levels of education and training makes it important to develop good safety routines in order to minimise the risk of laser accidents. A specially educated and trained assistant, the key operator, is of great help in monitoring laser safety regulations in the operating room during surgery and ...

The U.S. Nuclear Regulatory Commission is conducting an accident management research program that emphasizes the use of severe accident research to enhance the ability of plant operating personnel to effectively manage severe accidents. Hence, it is necessary to ensure that the plant instrumentation and information systems adequately ...

This paper describes the technical approach used in the Modal Study performed by the Lawrence Livermore National Laboratory to evaluate the level of safety provided during the shipment of spent fuel from nuclear power reactors. The evaluation is performed by calculating the responses of representative spent fuel casks to severe highway and railway accidents and the ...

Thirty years ago the world of Commercial Aviation provided a challenging environment. In my early flying days, aircraft accidents were not unusual, flying was seen as a risky business and those who took part, either as a provider or passenger, appeared grudgingly willing to accept the hazards involved. A reduction in the level of risk was sought in technological advances, ...

An overview of response management in the early phase of an emergency at a nuclear installation is provided from a systems approach. This starts with the recognition of response goals, and using detailed analyses of threats, past experience, international law and principles, a response strategy is developed. The process is illustrated for the case of severe accidents at ...

This paper discusses salient aspects of severe accident related phenomenological considerations, scoping studies, and mitigative design features being studied for incorporation into a high-power research reactor plant. Key results of scoping studies on steam explosions, recriticality, core-concrete interactions, and containment transport are highlighted. ...

...CONTINUED) PIPELINE SAFETY TRANSPORTATION OF HAZARDOUS... Annual, Accident, and Safety-Related Condition Reporting...prescribes requirements for periodic reporting and for reporting of accidents and safety-related...

An analysis of thermosyphoning in a stream generator model is presented. The model considers the transient development of buoyancy-driven steam flow in the steam generator tubing, secondary side heat transfer and an inlet plenum mixing model. Numerical solutions are obtained for conditions intended to simulate the natural circulation phenomena in a 3-Loop pressurized water ...

The analyses presented in this paper describe advanced methods of performing accident analyses by using finite element analysis. The models created to obtain solutions for these accident conditions are three-dimensional solid models which are solved in tr...

Haulage accidents comprise about 17 percent of all nonfatal coal-mine accidents; considering relatively small number of employees exposed to such accidents, haulage is most hazardous phase of coal-mine operation. Suggestions for improving conditions are given.

The publication contains briefs of selected railroad accidents occurring in U.S. Railroad operations. The brief format presents basic facts, conditions, circumstances, and probable cause(s) in each instance.

The Bureau of Mines manual is oriented to the technical needs of an investigation of fire or explosion accidents and includes various practical and theoretical information that is needed in analyzing accidents or evaluating conditions that might lead to a...

A report is presented on in depth investigation of motor vehicle fatalities. Factors to be investigated in motor vehicle accidents are: (1) The accident scene including road, weather and traffic conditions and speed of vehicle(s). (2) The nature of injuri...

...conditions, and circumstances and the cause or probable cause or causes of: all accidents involving civil aircraft, and certain public aircraft; highway accidents, including railroad grade-crossing accidents, the investigation of which...

...injuries, and property damage from traffic accidents. Most traffic accidents can be prevented. Investigation of motor vehicle accidents should examine all factors, operator status, vehicle condition, and supervisory control measures...

An important goal of the US DOE Sodium Fast Reactor (SFR) program is to develop the technology necessary to increase safety margins in future fast reactor systems. Although no decision has been made yet about who will build the next demonstration fast reactor, it seems likely that the construction team will include a combination of international companies, and the safety design philosophy for the ...

This report describes a study performed by the Lawrence Livermore National Laboratory to evaluate the level of safety provided under severe accident conditions during the shipment of spent fuel from nuclear power reactors. The evaluation is performed using data from real accident histories and using representative truck and rail cask ...

In support of the US Nuclear Regulatory Commission Accident Management Research Program, the availability of instruments to supply accident management information during a broad range of severe accidents is evaluated for a Boiling Water Reactor with a Mark I containment. Results from this evaluation include: (1) the identification of ...

As is well known, the role of the road network during and after an earthquake is of paramount relevance. In the light of the above, the main goal of the paper has been confined to the analyses of road performance in seismic conditions, as a result of intrinsic (structural and functional conditions, redundancy, etc.) and extrinsic (loads, flows, etc.) ...

A theoretical model has been used for predicting the behavior of fission gas and volatile fission products (VFPs) in UO/sub 2/-base fuels during steady-state and transient conditions. This model represents an attempt to develop an efficient predictive capability for the full range of possible reactor operating conditions. Fission products released from the ...

A theoretical model has been used for predicting the behavior of fission gas and volatile fission products (VFPs) in UO/sub 2/-base fuels during steady-state and transient conditions. This model represents an attempt to develop an efficient predictive capability for the full range of possible reactor operating conditions. Fission products released from the ...

This document analyzes aboveground tank failure accident scenarios for the Demonstration Bulk Vitrification system (DBVS). The radiological and toxicological consequences are determined for a range of aboveground tank failure accident scenarios to determine the representative accident for DBVS. Based on the consequence results and ...

The system response in a transportation accident environment is an element to be considered in an overall Transportation System Risk Assessment (TSRA) framework. The system response analysis uses the accident conditions and the subsequent accident progression analysis to develop the accident ...

The report consists of four parts. Part 1 estimates effects of campaigns on road accidents, fatal accidents and serious injury accidents by means of meta-analysis. Effect of campaigns in the campaign period is ca 9% reduction in the number of accidents (p...

SARNET (Severe Accident Research Network) is a Network of Excellence of the EU 6. Framework Programme that integrates in a sustainable manner the research capabilities of about fifty European organisations to resolve important remaining uncertainties and safety issues concerning existing and future nuclear plant, especially water-cooled reactors, under hypothetical severe ...

A primary-pipe break accident is one of the design-basis accidents of a high-temperature gas-cooled reactor (HTGR). When this accident occurs, air is anticipated to enter the reactor core from the break and oxidize the in-core graphite structure in the modular pebble bed reactor (MPBR). This paper presents the results of the graphite ...

Estimates of the potential airborne release of radioactive materials in transportation accidents are necessary to compare the safety in various shipping methods. To make such estimates, information is required on various aspects of the accident situation (physical and chemical characteristics of the source materials, forces/conditions ...

Available models for predicting failure of flawed and unflawed steam generator tubes under normal operating, accident, and severe accident conditions are reviewed. Tests conducted in the past, though limited, tended to show that the earlier flow-stress mo...

Previous studies of accident rates in different road surface conditions, based on accidents reported to the police, have made it possible to distinguish only between accident rates on a dry bare surface, wet/moist bare surface and icy/snowy road surface. ...