Flameproof Diesel Engines in Underground Coalmines in Britain—design Features and Operational Experience

1988 ◽  
Vol 202 (4) ◽  
pp. 225-231
Author(s):  
J A N Currie
Keyword(s):  
Research And Development ◽  
Diesel Engines ◽  
Underground Mines ◽  
Operational Experience ◽  
Design Features ◽  
Paper Briefly ◽  
Evolutionary Processes ◽  
Safety Requirements ◽  
Design Changes

The use of flameproofed diesel engines in underground mines of the British coalmining industry has a history approaching fifty years. During that time, the design of the flameproof package has seen considerable changes, due both to normal evolutionary processes and to changes to statutory requirements, the most recent of which is the introduction of BS 6680 (1). This paper briefly reviews the design changes that have occurred and describes the design features of typical current units. Today's units are inevitably more complex than those which were first introduced, owing to more stringent safety requirements; this has an impact on reliability and maintenance which is discussed, along with general operational experience. The implications of the introduction of BS 6680 on future designs are also discussed, together with recent and current research and development aimed at reducing the size and cost of the flameproof unit.

Energy in the 1980s - Operational experience in nuclear power stations

1974 ◽  
Vol 276 (1261) ◽  
pp. 571-586
Keyword(s):  
Nuclear Power ◽  
Nuclear Energy ◽  
Large Scale ◽  
Electrical Power ◽  
Operating Experience ◽  
Operational Experience ◽  
Original Design ◽  
Safety Requirements ◽  
Design Concepts ◽  
Power Stations

From the first self-sustaining nuclear reaction to the present day represents a span of three decades: within that time large-scale generation of electrical power from nuclear energy has become acknowledged as economic, safe and environmentally acceptable. Within the U .K . 10% of electricity consumed is of nuclear origin. Some of the C.E.G.B. reactors have been in service for over 10 years. The operating experience that has been gained shows how the original design concepts have been ultimately developed. Some of the difficulties encountered and the engineering solutions are presented. Operating experience feeds back to the design philosophy and safety requirements for future nuclear plant. In this way a foundation is provided for the further exploitation of what must become a major source of energy in the next decade.

TITANIC - The Design History, Forensic Analysis of the Sinking, and Aftermath

2021 ◽  
Author(s):  
Robert Forrest Roddy
Keyword(s):  
Forensic Analysis ◽  
Design History ◽  
Design Features ◽  
Paper Briefly ◽  
The World ◽  
History Of ◽  
White Star

After more than one hundred years the Titanic is still probably the most remembered ship in the world. This paper briefly discusses the history of the Titanic from why the White Star Line decided to build the Olympic class ships through the recently signed treaty protecting the ship. It is shown that many of the design features of the ship were far ahead of the rest of the industry but that some compromises were against the naval architect’s desires. A number of myths concerning the ship are dispelled. The circumstances leading up to the collision with the iceberg and the sinking of the ship are examined followed by an analysis of the sinking; the discovery of the ship; and finally after almost thirty-five years, a treaty to protect the ship.

On Miner's Location in Underground Mines

2021 ◽  
pp. 80-83
Author(s):  
A.V. Novikov ◽  
K.V. Panevnikov ◽  
I.V. Pisarev
Keyword(s):  
Coal Mine ◽  
Coal Mines ◽  
Underground Mines ◽  
Mine Safety ◽  
National Standard ◽  
Positioning Systems ◽  
Safety Requirements ◽  
Safety Regulations ◽  
Mining Safety ◽  
Safety Systems

To ensure industrial and mining safety the established safety rules for coal mines envisage the use of a number of complexes and systems, combined into multifunctional safety systems. These automated systems provide for people to be involved in the management of technological processes. The purpose of this paper is to assess how the coal mine safety requirements are aligned with other regulatory documents as they apply to modern safety systems in coal mines. To achieve this goal, the personnel location (positioning) and emergency alert systems in coal mine workings are analyzed for compliance with the requirements of the national standard for multifunctional safety systems in coal mines. It is shown that the current requirements for positioning systems are met by systems that have high accuracy in determining the location coordinates of people. It is suggested that positioning systems of the zonal type should be either upgraded to increase the number of readout devices to bring them up to the requirements of safety regulations in coal mines or replaced.

Some Considerations in the Design of Polar Icebreakers

1972 ◽  
Vol 9 (01) ◽  
pp. 42-58
Author(s):  
J. Gordon German ◽  
C. F. Collins ◽  
A. R. Webster
Keyword(s):  
Diesel Engines ◽  
Gas Turbines ◽  
Design Features ◽  
Factors Affecting ◽  
Medium Speed ◽  
Hull Design ◽  
Ice Conditions ◽  
Hull Construction

This paper highlights some primary considerations in the design of polar icebreakers. Factors affecting determination of power-displacement relationships and the propulsion horsepower are discussed, as is the importance of clearly defining the manner in which the various ice conditions are to be handled. The authors deal briefly with hull construction aspects, outlining the general requirements for polar-class icebreakers, choice of parameters, and the principal hull design features of a proposed new Canadian polar icebreaker. Propulsion machinery options are discussed, including medium-speed diesel engines, aircraft and industrlal-type gas turbines, and combination systems.

The Langton Riser

1969 ◽  
Vol 184 (8) ◽  
pp. 269-275
Author(s):  
K. W. H. Whittington
Keyword(s):  
Historical Review ◽  
Scale Model ◽  
Operational Experience ◽  
Post Office ◽  
Design Changes

The paper commences with an explanation of the need for reliable bulk-mail elevators in multi-storey sorting offices; it continues with a brief description of the Langton riser. There follows an historical review of Post Office experience with such machines, including references to the first scale model, early operational experience, and the design changes subsequently introduced. Mention is then made of the improved reliability of the redesigned risers. In conclusion, brief descriptions are given of the steps being taken to overcome the remaining shortcomings.

scholarly journals Erratum: Research and Development towards Utilization of DME Powered Diesel Engines [Vol.51, No.6, p.317-331]

2009 ◽  
Vol 52 (1) ◽  
pp. 27-28
Author(s):  
Mitsuharu Oguma ◽  
Shinichi Goto ◽  
Shinichi Suzuki ◽  
Shigemichi Yuki
Keyword(s):  
Research And Development ◽  
Diesel Engines

scholarly journals Method for Radioactive Waste Disposal in Underground Mines

2021 ◽  
Vol 15 (2) ◽  
pp. 49-62
Author(s):  
E. V. Kuzmin ◽  
◽  
A. V. Kalakutsky ◽  
A. A. Morozov ◽  
◽  
...  
Keyword(s):  
Rock Mass ◽  
Radioactive Waste ◽  
Radioactive Waste Disposal ◽  
Underground Mines ◽  
Regulatory Requirements ◽  
Paper Briefly ◽  
Geomechanical Properties ◽  
Ore Processing ◽  
Underground Disposal ◽  
State Corporation

This paper presents the key parameters associated with the disposal method used to dispose of radioactive waste (RW) of Class 2 and 3 in abandoned underground mines of PIMCU site assuming additional isolation of RW containers, adjustment of bedrock geomechanical properties and compliance with regulatory requirements. The paper briefly analyzes international practices focused on RW disposal in natural and artificial underground cavities. It provides a comparison between the forecasted volumes of RW generation at the enterprises of the State Corporation Rosatom and the available underground disposal capacity at PIMCU site. It presents the main characteristics of a paste filling manufactured based on materials from uranium ore processing and used as an insulating filler inside the vaults. The paper summarizes the results of operations on rock mass reinforcement based on an injection method. It indicates the key advantages of the proposed method.

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