SAFETY ANALYSIS REPORT FOR PACKAGING, MODEL 9977, ADDENDUM 3, JUSTIFICATION FOR SMALL GRAM QUANTITY CONTENTS Page: 29 of 120

                                
Justification for Small Gram Quantity Contents

CHAPTER 3 -- THERMAL EVALUATION
The decay-heat rates for the SGQ Contents are limited to the 19-Watt package thermal limit for
the 9977. Therefore, the package thermal performance documented in the 9977 SARP Revision
2 is equally valid for all three shielded container configurations with the SGQ Content Envelope.
The MNOP is reevaluated for the SGQ Contents and SGQ Containers.
3.1     DESCRIPTION OF THERMAL DESIGN
Thermal performance of the package under NCT and HAC was verified by testing and quantified by
analysis. The NCT and HAC test results are documented in SARP Appendices 3.1 and 3.2. The NCT and
HAC analyses are documented in SARP Appendices 3.3, 3.4, and in Addendum Appendix A.3.1 and
summarized in SARP Table 3.2 and Addendum Table A.3.1. The calculated temperatures compare closely
with the measured temperatures and are bounding for all SGQ Content envelopes and configurations
identified in Section 1.2.2.
Table A.3.1 - Maximum NCT Temperatures - Engineered Container and Shielded Container Configurations
Insolation  Heat Rate  CV Wall   O-Rings  Payload    Payload     Drum Wall
Model                                                        (Max)    (Average)   Actual   Limit
(Watts)     ( F)      ( F)      ( F)      ( F)      ( F)     ( F)
Yes         19        314       284       349       314        na      na
SGQ-SC1           Yes         6         236       227       247       236        na      na
(Lead Shielding)     No          19        213       180       255        nc       105      122
No         11.5      172        150      199        nc        103      122
Yes         19        297       282       312       298        na      na
SGQ-SC2
(H QESCd          Yes         3         228       228       nc        226        na      na
(HDPE Shielding)
No         19        202        181      249        218       105      122
SGQ-SC3           Yes         19        307       276       351       306        na      na
(Tungsten Shielding)   No         19         215       175      268        nc        105      122
SGQ-EC1           Yes        19 a       309       283      1120       nc         nc      nc
(Engineered Container)  Yes        19        305       284       349        nc        nc       nc
na not applicable
nc not calculated
a   Content modeled as a "point source" %-inch diameter x 1-inch long (per baseline model, SARP Section 3.3.1.1.4)
b   Content modeled as a "finite source" 2-inches diameter x 6.75-inches long
Addendum Figures A.3.1, A.3.2, and A.3.3 show the material representation of the SGQ-SC1, SGQ-SC2,
and SGQ-SC3 configurations, respectively. Addendum Figure A.3.4 is a material representation of the
SGQ-EC1 configuration.

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S-SARA-G-00006, Revision 5