Accession Number : ADA141719

Title :   Inspection Policies for Stand-By Systems.

Descriptive Note : Technical rept.,


Personal Author(s) : Thomas,L C ; Jacobs,P A ; Gaver,D P

PDF Url : ADA141719

Report Date : Mar 1984

Pagination or Media Count : 67

Abstract : An auxiliary service unit is normally idle, or in cold standby. If a demand for the unit's service occurs, the unit must be available to satisfy it, or else catastrophe occurs. Policies for periodic inspection and maintenance of such a unit are derived in this paper that maximize the expected time until a catastrophe occurs. The policies recognize that inspection, maintenance, and repair periods are of non-zero duration, during which the unit is vulnerable. These also account for the possibility of hazardous inspection that may damage the unit, and various forms of imperfect repair. Important examples occur in the nuclear power industry: a unit may be a pump, or emergency diesel generator, and a demand may be caused by an initiating event such as pipe break or loss of off site power; catastrophe equates to loss-of coolant accident or melt down. Other examples occur in the military, and in emergency services to hospitals. (Author)

Descriptors :   *Systems engineering, *Standby equipment, *Inspection, *Markov processes, *Nuclear power plants, Reliability, Maintenance, Safety, Emergencies, Auxiliary, Hazards, Diesel engines, Equations

Subject Categories : Administration and Management
      Statistics and Probability
      Nuclear Power Plants and Fission Reactor Eng

Distribution Statement : APPROVED FOR PUBLIC RELEASE