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Titolo:
Risks of particle hits during space walks in low earth orbit
Autore:
Pate-Cornell, E; Sachon, M;
Indirizzi:
Stanford Univ, Dept Management Sci & Engn, Stanford, CA 94305 USA StanfordUniv Stanford CA USA 94305 nt Sci & Engn, Stanford, CA 94305 USA Int Grad Business Sch, Barcelona, Spain Int Grad Business Sch Barcelona Spain ad Business Sch, Barcelona, Spain
Titolo Testata:
IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS
fascicolo: 1, volume: 37, anno: 2001,
pagine: 134 - 146
SICI:
0018-9251(200101)37:1<134:ROPHDS>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
--discip_EC--
Citazioni:
17
Recensione:
Indirizzi per estratti:
Indirizzo: Pate-Cornell, E Stanford Univ, Dept Management Sci & Engn, 348 Terman EngnBldg, Stanford,CA 94305 USA Stanford Univ 348 Terman Engn Bldg Stanford CAUSA 94305 A
Citazione:
E. Pate-Cornell e M. Sachon, "Risks of particle hits during space walks in low earth orbit", IEEE AER EL, 37(1), 2001, pp. 134-146

Abstract

The construction of the International Space Station (ISS) may involve several thousand hours of space walks or "extravehicular activities" (EVAs), Among the many risks involved in EVAs, we focus here on potential failures ofthe external maneuvering unit (EMU) caused by impacts of space particles (micro-meteoroids and orbital debris). We present a probabilistic risk analysis (PRA) model based on available data for the particle flux in low Earth orbit (LEO) as well as test data obtained at Johnson Space Center about thecapacity of the current EMU to absorb these loads. We computed the risk for a peak year of EVA activity, assumed by NASA to consist of 624 hours of EVA exposure. For that time period, we found that, the probability of a fatality is about 1.4*10(-3) without shielding and 1.1*10(-3) per 624 hours of EVA with shielding. This model can be used as support for a number of decisions regarding space suit design, astronaut shielding options, and overall number of EVA hours for space station construction and operation.

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Documento generato il 27/11/20 alle ore 13:34:19