On lanuary 79, 7975, research and development programs of the U.S. Atomic Energy Commission (AEC) became part of the newly formed Energy Research and Development Administration (ERDA). In this report, since it refers to work done in 1974, most references are to AEC programs.
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BATTELLE PACIFIC NORTHWEST LABORATORIES RICHLAND, WASHINGTON 99352PREFACE T h i s r e p o r t i s one o f a s e r i e s o f i n t e r i m r e p o r t s t h a t w i l l be i s s u e d on t h e computer code GAPCON. The name o f t h e m o d i f i e d code was changed t o GAPCON-THERMAL-] t o d i f f e r e n t i a t e between t h e f a s t r e a c t o r code used by Hanford E n g i n e e r i n g Development L a b o r a t o r y and t h i s code which was prepared b y B a t t e l l e-Paci f i c Northwest L a b o r a t o r i e s and i s used by t h e R e g u l a t o r y S t a f f as a c a l c u l a t i o n a l t o o l . T h i s p r e l i m i n a r y v e r s i o n o f t h e code i s b e i n g p u b l i s h e d p r i m a r i l y t o c o n s o l i d a t e t h e changes i n t h e code i n t o onepackage f o r t h e R e g u l a t o r y S t a f f . The code should n o t be used as a f u e l d e s i g n code, b u t as one o f s e v e r a l c a l c u l a t i o n a l t o o l s a v a i l a b l e f o r a c c i d e n t analyses. The numerous models i n t h e code a r e based on a b e s t e s t i m a t e o f t h e d a t a ; no e f f o r t was expended t o a r t i f i c i a l l y f o r c e t h e code A Comparison o f GAPCON-' THERMAL P r e d i c t i o n s w i t h G r a i n Growth:leasurements f r o m CEA-R-3358, Sampl e 41 10-AE1 (EOL C o n d i t i o n s ) . A Comparison o f GAPCON-THERMAL P r e d i c t i o n s w i t h G r a i n Growth Measurements f r o m CEA-R-3358, Sampl e 41 11 -AE2 (EOL C o n d i t i o n s ) . A Comparison o f GAPCON-THERMAL P r e d i c t i o n s w i t h G r a i n Growth Measurements f r o m CEA-R-3358, Sampl e 41 12-AE1 (EOL C o n d i t i o n s ) . A Comparison o f GAPCON-THERMAL P r e d i c t i o n s w i t h G r a i n GrowthF~leasurements f r o m CEA-R-3358, Sample 41 12-AE2 (EOL C o n d i t i o n s ) . A Comparison o f P r e d i c t e d Gap Conductances w i t h ReportedValues From CVNA-142. . . . . . . . . . . . . . . . . . . . . . A Comparison o f GAPCON-THERMAL P r e d i c t i o n s w i t h G r a i n GrowthMeasurements from CVNA-142, Sample 11-1 . . . . . . . . . . . . A Comparison o f GAPCON-THERMAL P r e d i c t i o n s w i t h G r a i n GrowthMeasurements f r o m CVNA-142, Sample 11-2 . . . . . . . . . . . . A Corr~parison o f GAPCOIV-THERMAL P r e d i c t i o n s w i t h G r a i n GrowthMeasurements f r o m CVNA-142, Sample 11-3 . . . . . . . . . . . . A Comparison of GAPCON-THERMAL P r e d i c t i o n s w i t h Fuel A Comparison o f GAPCON-THERIYAL P r e d i c t i o n s w i t h ReportedC e n t e r l i n e Temperatures f r o m WCAP-2923, Capsule 1 . . . . . . . t h a t have e v o l v e d as a r e s u l t o f t h e R e g u l a t o r y S t a f f a d a p t i n g t h e code as a t o o l f o r use i n e s t i m a t i n g f u e l -c l a d d i n g gap conductances and f u e l s t o r e d energy. The code, i n i t s c u r r e n t s t a t u s , i s n o t i n t e n d e d t o be used as a f u e l d e s i g n code. A number o f o p t i o n s t h a t have been added t o t h e code have proven u s e f u l ...
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