Thermal cycle, shock, acceleration and vibration testing of a BeO reflector specimen, part No. EX-N69626085 Page: 8 of 56
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ATOMICS INTERNATIONAL PAGE . 5
4 Ihrnse. .4 %.rtek 4.err.... RM .nert l'g..e ,.n
i. '..iT GJZcTIhJ
The objectives of this test were (1) to deter-ine the ability of the
e2 block and the Ta-10.: band, which represent a typical section of the
4 Pi :.eflector, to withstand prelaunch thermal cycles and anticipated
launch loads, and (2) to provide data for the design of the complete
. est Procedure and .,ork Plan
This test report describes one of the activities outlined in the W:ork
^lan for 'the 4 Pi Reflector C) and described in detail in the Development
Test ?rocedure for this specific test.
C. Description of Test Item
~Te reactivity of the ZrH reactor will be controlled by ten cylindrical
shaped poison backed control drums which reflect or absorb the reactor
neutron according to the angular orientation of the drums about their
lcnrit.dinal ais with respect to the reactor core. The reflector material
is ?ec, and the absorber (poison) and structural material is a Ta-10W alloy.
:ach drum is czmposec of semi-cylindrical segments of BeD banded to a rigid
absorber plate. A cladding of Ta-10W alloy is considered as one of the
materials to cover the PeS segments.
The 'e3 segment and Ta-1W band used in this test were representative of
a section cf the proposed control drum.
'Te ?e3 block was procured (Purchase Order Ko. N8410430) from the
rush per Llium Co. as Thernalox 995 prepared by cold pressing and sintering.
"he density was specified on the drawing (r,:-::69622007) to be 2.84 to 2.96
E/cm~', and the grain size to be 10 to 20 microns (See Appendix 1-3)
This segment used in this test (Figures 1 and 2) was machined from the
:-69622007 block as per Drawing No. -69626085 (See Appendix 4).
The 'Ta-10. alloy was obtained from Fansteel, Inc., (?urchase Order
:o. 9520029) as 0.010-inch thick sheet (See Appendix 5) which was machined
into the band as per rawing ho. a-69626084 (See Appendix 6).
FORM 719-P REV. 6-68
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Welch, F.H. Thermal cycle, shock, acceleration and vibration testing of a BeO reflector specimen, part No. EX-N69626085, report, April 24, 1969; Canoga Park, California. (https://digital.library.unt.edu/ark:/67531/metadc878544/m1/8/: accessed March 20, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.