Commenced in January 2007
Frequency: Monthly
Edition: International
Paper Count: 32586
Using RASCAL and ALOHA Codes to Establish an Analysis Methodology for Hydrogen Fluoride Evaluation

Authors: J. R. Wang, Y. Chiang, W. S. Hsu, H. C. Chen, S. H. Chen, J. H. Yang, S. W. Chen, C. Shih


In this study, the RASCAL and ALOHA codes are used to establish an analysis methodology for hydrogen fluoride (HF) evaluation. There are three main steps in this study. First, the UF6 data were collected. Second, one postulated case was analyzed by using the RASCAL and UF6 data. This postulated case assumes that fire occurring and UF6 is releasing from a building. Third, the results of RASCAL for HF mass were as the input data of ALOHA. Two postulated cases of HF were analyzed by using ALOHA code and the results of RASCAL. These postulated cases assume fire occurring and HF is releasing with no raining (Case 1) or raining (Case 2) condition. According to the analysis results of ALOHA, the HF concentration of Case 2 is smaller than Case 1. The results can be a reference for the preparing of emergency plans for the release of HF.

Keywords: RASCAL, ALOHA, UF6, hydrogen fluoride.

Digital Object Identifier (DOI):

Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 641


[1] G. F. Athey, J. P. Rishel, J. V. Ramsdell, Jr., and J. J. Tomon, RASCAL 4.3: User’s Guide, U.S. Nuclear Regulatory Commission, Washington, DC, 2015.
[2] J. V. Ramsdell, Jr., G. F. Athey, and J. P. Rishel, RASCAL 4.3: Description of Models and Methods, U.S. Nuclear Regulatory Commission, Washington, DC, 2015.
[3] R. Jones, W. Lehr, D. Simecek-Beatty, R. M. Reynolds, ALOHA (Areal Locations of Hazardous Atmospheres) 5.4.4 Technical Documentation, 2013.
[4] AIHA Guideline Foundation, 2016 ERPG/WEEL Handbook, 2016.
[5] W. S. Hsu, J. R. Wang, H. C. Chen, Y. Chiang, S. W. Chen and C. Shih, Evaluation of control room habitability in case of LOCA for Maanshan NPP using codes RADTRAD, HABIT and ALOHA, Kerntechnik, Vol. 83, 2018.
[6] W. S. Hsu, Y. Chiang, H. C. Chen, J. R. Wang, S. W. Chen, J. H. Yang, C. Shih, The Concentration Analysis of CO2 Using ALOHA Code for Kuosheng Nuclear Power Plant, World Academy of Science, Engineering and Technology International Journal of Nuclear and Quantum Engineering Vol:12, No:4, 2018.