APPLICATION OF POLYURETHANE FOAM FOR IMPACT ABSORPTION AND THERMAL INSULATION FOR RADIOACTIVE MATERIALS PACKAGINGS. Page: 4 of 8

                                
WSRC-STI-2007-00444

Table 1. Comparison of Published Data with Last-A-Foam Reference Data
10% Strain,                 20% Strain
Application  Density    Package      General      Package        General
lbm/ft3    Foam Crush   Plastics Last  Foam Crush   Plastics Last
Stress, psi  -A- Foam      Stress, psi   -A- Foam
Stress, psi                 Stress, psi
9977         16                      776(766                     802
perp)
Sandia      16.23      767           776          767            802
CRETE
Sandia      29         2320          2249
CRETE
Seo, et al  29         2030          2249         2300           2469
TRUPACT- 8.25           235          228 (for 8   235            221
II                                  lbm/ft3)
Sandia      18          1000         958           1250          1002
BUSS
AT-400      30          2500         2390
RH-TRU       11.5       376          430          376            430
72-B
MH-1A       4           88           96
('87 last-a-
foam data)
MH-1A        15         700          691          750            710
('87 data)
HIFR ('87)   17         960          865           1000          900
Table 2. Summary and Comparison of Crush Test Results for SN-6
Batch Sample
Specimen        Test            In-situ sample                  "free rise"
Sample      orientation           Stress at  Nominal           Stress at  Nominal
Location     relatives  Density    10     stress at  Density    10%     stress at
Loain     foam rise   Dniy       1%0%sty10%                            10%
strain,   strain*             strain   strain**
(lbm/ft3)  (psi)     (psi)   (lbm/ft)   (psi)    (psi)
Sidewall   Parallel        16.73    726.4      841      15.46     651.3     730
Sidewall   Perpendicular   17.83    816.8      952      16.29     692.5     795
Bottom     Parallel         16.8    732.8      847      16.27     706.8      800
* Nominal stress corresponds to interpolated data from GP handbook at measured density of SN-6
sample.
** Nominal stress corresponds to interpolated data from GP handbook at measured density of batch
sample.

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