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Author: donamy
The starboard side International Space Station (ISS) heat rejection subsystem radiator (HRSR)
was launched on October 2002, and deployed and serviced in November 2007. A survey of
previous ISS images and videos verified this radiator was in the normal configuration on
August 29, 2008. However, on September 1, 2008, a video survey of ISS indicated a face sheet
had debonded and peeled up on HRSR S1-3 panel 7 with no apparent source for the damage.
This radiator damage consisted of a large section of the face sheet peeled up, sheared face sheet
metal, and debonded from the adjoining face sheet. The face sheet showed considerable
wrinkling and evidence of one micrometeoroid orbital debris (MMOD) penetration. The face
sheet on the panel’s back side showed a smaller wrinkled area with suspected debonding. Since
being discovered, S1-3 panel 7 has showed no observable signs of increasing damage.
Additionally, multiple dockings of Soyuz, Progress, and Space Shuttle Orbiter, and vibration
induced during ISS reboost have resulted in no detectable changes.
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