NDLI: Risks of particle hits during space walks in low Earth orbit

Content Provider	IEEE Xplore Digital Library
Author	Pate-Cornell, E. Sachon, M.
Copyright Year	1965
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 of the 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 as well as test data obtained at Johnson Space Center about the capacity 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 1.410/sup -3/ without shielding and 1.110/sup -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.
Starting Page	134
Ending Page	146
Page Count	13
File Size	872441
File Format	PDF
ISSN	00189251
Volume Number	37
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Low earth orbit satellites Space stations Risk analysis NASA Space exploration International Space Station Space debris Industrial accidents Fires Testing
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Aerospace Engineering

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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