• 베이커리
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• no.4 s.345
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• pp.38-53
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• 1997

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2010.10a
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• pp.315-316
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• 2010

본 연구는 파이로일관공정시험시설인 PRIDE (Py-Roprocess Integrated DEmonstration facility)의 최상위 요구사항부터 파이로 세부공정의 설계요건까지 논리적이며 체계적인 연관성을 제시할 수 있는 파이로 기술추적시스템 개발현황을 기술하였다. 이러한 기술추적기능을 도출하기 위하여 시스템 엔지니어링 도구인 Cradle 데이터베이스를 이용하였다.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2009.05a
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• pp.219-222
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• 2009

Pyrostarters play a role as a turbopump starter in liquid propellant propulsion systems by supplying pressurized gas to power turbines for engine start. A rupture disk in pyrostarters, which is usually installed behind a nozzle throat, not only isolates the charged solid propellants from the external environment but also improves the ignitability of the solid propellants by increasing a chamber pressure at the beginning of combustion. Experimental tests have been performed to study the effects of rupture disk thickness, depth and shape of scores, and pressure build-up rates on burst pressures and burst diameters. The experimental results show that the developed rupture disk fulfills the performance requirements expected in a real operational condition.

• 베이커리
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• no.6 s.383
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• pp.96-99
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• 2000

• Journal of Korea Society of Industrial Information Systems
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• v.18 no.5
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• pp.81-92
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• 2013

The satellite includes many release mechanisms such as solar array deployment, antenna deployment, cover to protect contamination in scientific equipment, pyro value of the propulsion subsytem, and bypass device in Li-Ion cell module. A drive the initiators is a critical to the successful mission because the initiators of release mechanism driving by the pyrotechnic circuit is operated in single short. The pyrotechnic circuit has to provide switching network for safety. A typical switching network has defect consisting of high current rating fire switch to handle switching transient current during fire the initiator. The pyrotechnic circuit is required some form of power conditioning to reduce the peak power demanded from the bus if the initiators are to be fired from the main bus. This paper design a pyrotechnic circuit synchronized to the fire-command to activate the fire switch to overcome use high current rating fire switch to handle switching transient current during fire the initiator. The pyrotechnic circuit provides a current limited widow pulse for fire current synchronized to the fire-command to insure that fire switch will only carry the current but never switch it. The current limited widow pulse for fire current can be possible to use low current rating and light mass switch in switching network. The current limit function in the pyrotechnic circuit reduces supply voltage to initiator and provides the effect of power conditioning function to reduce peak bus power. The pyrotechnic circuit to apply satellite development on geostationary orbit is verified the function by test in development model.

• 베이커리
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• no.4 s.381
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• pp.92-93
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• 2000

• Nuclear industry
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• v.34 no.3
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• pp.39-43
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• 2014

한국원자력연구원에서는 사용후핵연료 관리 방안의 일환으로 파이로 공정 기술을 개발하고 있다. 파이로 기술은 PWR 사용후핵연료를 처리함으로써 사용후핵연료의 부피, 방사성 독성, 열부하 및 처분장 면적 등을 감소시킬 수 있을 뿐 아니라, TRU 핵종들을 함께 회수하여 소듐냉각고속로의 금속 연료로 제공이 가능하므로 핵저항성과 핵연료의 재활용률을 증대시킬 수 있다는 장점을 가지고 있다. 한국원자력연구원에서 개발되고 있는 파이로 공정 기술에 대해 전처리 공정에서부터 마지막 폐기물 처리 공정에 이르기까지의 공정 기술에 대해 설명하고 이와 관련된 연구 시설인 DFDF 시설과 ACPF 시설, 그리고 공학 규모 파이로 일관 공정 시험 시설인 PRIDE 3) 시설의 개발 현황을 설명하고자 한다.

• Aerospace Engineering and Technology
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• v.9 no.2
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• pp.204-209
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• 2010

The current status of the development of pyrostarters, which play a role as a turbo pump starter in liquid propellant propulsion systems by supplying pressurized gas to power turbines for engine start, has been introduced. Firstly, the development history is briefly summarized, and secondly the current technical status in core parts for the development of pryrostarters such as solid propellants, internal ballistics, rupture discs, and igniters are presented. The current technical achievements could make it feasible to fulfill the development requirements for pyrostarters.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.36 no.9
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• pp.923-928
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• 2008

Pyrotechnic shock or pyroshock is characterized as a transient vibration phenomenon which shows large acceleration and high frequency range up to 10kHz during the operation of separation devices where explosives are used. During the flight of a launch vehicle, pyroshock is mainly generated at several events such as satellite separation, fairing separation and stage separation. In this paper, wiremesh isolators are introduced and several types of isolators are manufactured for the performance tests. For the investigation of typical characteristics of wiremesh isolators, compressive loading tests are basically performed and pyroshock tests are accomplished to confirm pyroshock isolation ability of each wiremesh isolator by using 4Kg dummy mass.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2009.11a
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• pp.149-152
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• 2009

A pyrostarter is a sort of gas generator, which supplies the energy to drive turbines by the combustion gas of a solid propellant charged internally. The igniter of the pyrostarter should guarantee the ignition reliability expecially for the solid propellant with a low fame temperature. For the development of the igniter, several closed bomb testes have been performed to decide several design parameters to get a sufficient chamber pressure build-up for the ignition. Moreover, as a result of the firing testes with pyrostarters, the ignition reliability have been verified and the amount of igniter propellants has been reviewed.