Source term evaluation for UF{sub 6} release event in feed facility at gaseous diffusion plants

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Description

An assessment of UF{sub 6} release accidents was conducted for the feed facility of a gaseous diffusion plant (GDP). Release rates from pig-tail connections were estimated from CYLIND code predictions, whereas, MELCOR was utilized for simulating reactions of UF{sub 6} with moisture and consequent transport of UO{sub 2}F{sub 2} aerosols and HF vapor through the building and to the environment. Two wind speeds were utilized. At the high end (Case 1) a wind speed of {approximately} 1 m/s (200 fpm) was assumed to flow parallel to the building length. At the low end (Case 2) to represent stagnant conditions a ... continued below

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22 p.

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Kim, S. H. & Taleyarkhan, R. P. January 30, 1997.

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Description

An assessment of UF{sub 6} release accidents was conducted for the feed facility of a gaseous diffusion plant (GDP). Release rates from pig-tail connections were estimated from CYLIND code predictions, whereas, MELCOR was utilized for simulating reactions of UF{sub 6} with moisture and consequent transport of UO{sub 2}F{sub 2} aerosols and HF vapor through the building and to the environment. Two wind speeds were utilized. At the high end (Case 1) a wind speed of {approximately} 1 m/s (200 fpm) was assumed to flow parallel to the building length. At the low end (Case 2) to represent stagnant conditions a corresponding wind speed of 1 cm/s (2 fpm) was utilized. A further conservative assumption was made to specify no closure of crane and train doors at either end of the building. Relaxation of this assumption should provide for additional margins. Results indicated that, for the high (200 fpm) wind speed, close to 66% of the UO{sub 2}F{sub 2} aerosols and 100% of the HF gas get released to the environment over a 10-minute period. However, for the low (2 fpm) wind speed, negligible amount ({approximately} 1% UO{sub 2}F{sub 2}) of aerosols get released even over a 2 hour period.

Physical Description

22 p.

Notes

INIS; OSTI as DE98007048

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  • Other Information: PBD: 30 Jan 1997

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  • Other: DE98007048
  • Report No.: ORNL/TM--13383
  • Grant Number: AC05-96OR22464
  • DOI: 10.2172/631151 | External Link
  • Office of Scientific & Technical Information Report Number: 631151
  • Archival Resource Key: ark:/67531/metadc694570

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  • January 30, 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • Nov. 3, 2016, 6:32 p.m.

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Kim, S. H. & Taleyarkhan, R. P. Source term evaluation for UF{sub 6} release event in feed facility at gaseous diffusion plants, report, January 30, 1997; Tennessee. (digital.library.unt.edu/ark:/67531/metadc694570/: accessed August 24, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.