Technology for assessing the heating of rock during a fire in an underground research site laboratories

Irina Pozharkova

Abstract


The article is devoted to mathematical modeling of processes during a fire in an underground research laboratory of a final isolation facility for radioactive waste. Methods for calculating heat transfer in solids, which are used in studies devoted to analyzing the stability of tunnel structures in case of fire, are considered. A functional assessment diagram was constructed based on numerical modeling of the heating of rock enclosing an underground research laboratory. Input parameters that are significant from the point of view of the problem being solved have been identified, characterizing, on the one hand, the geometric, thermophysical, and fire hazardous properties of the object under study, and on the other hand, specific settings of the modeling environment. The process of creating a model of an underground research laboratory in FDS format is described, the values of the setting parameters are indicated, and the rationale for the components used is given. Measuring elements are presented that are used to save the estimated physical quantities during the calculation process and provide the possibility of subsequent visualization of the simulation results in accordance with the outputs of the functional diagram. The results of modeling a fire in an underground research laboratory for various scenarios of its development are presented. The ranges of changes in the parameters of the gas environment, heat flux density and temperature on the surface of the fences, the temperature inside solid bodies have been established when varying: the type of combustible load, the thermal properties of the rock, and the initial temperature. The prospects for using the presented technology are formulated, including for validly setting the conditions for conducting fire tests of rock samples, checking the effectiveness of fire protection systems at the site, and setting up neural network models.

Full Text:

PDF (Russian)

References


Materials to justify the license for the construction of a radioactive waste storage facility not related to nuclear installations, created in accordance with the design documentation for the construction of final isolation facilities for radioactive waste (Krasnoyarsk Territory, Nizhne-Kansky massif) as part of an underground research laboratory (including preliminary materials for assessing the impact on the environment Wednesday). Vol. 1. FSUE «National Operator for Radioactive Waste Management» : website. – URL: https://www.norao.ru/upload/docs/%D0%9C%D0%9E%D0%9B_%D1%82%D0%BE%D0%BC%201.pdf (date of the application: 01.05.2024). (In Russ.).

I. N. Pozharkova. Study of the temperature regime of a fire in an underground research laboratory based on numerical modeling. Fire and Explosion Safety, 2024, vol. 33, no. 4. (In Russ.).

Fire Dynamics Simulator. Technical Reference Guide. Volume 1: Mathematical Model. NIST Special Publication 1018-1, 2023, 230 p. (In Eng.).

S. F. Melnichuk, A. D. Golikov. Computer modeling of a fire in a tunnel, in Materials of the all-russian interuniversity scientific and technical conference of students and postgraduate students, part IV, 2008, pp. 116–117. (In Russ.).

I. A. Bolodyan, S. V. Puzach, A. S. Baranovsky. Numerical modeling of fire in a road tunnel. Selection of calculation grid. Fire Safety, 2021, no. 3 (104), pp. 47–54. DOI: 10.37657/vniipo.pb.2021.72.64.005. (In Russ.).

B. A. Schrefler et al. Concrete at high temperature with application to tunnel fire. Computational mechanics, 2002, vol. 29, pp. 43–51. (In Eng.).

H. Lai, S. Wang, Y. Xie. Study on the fire damage characteristics of the new Qidaoliang highway tunnel: Field investigation with computational fluid dynamics (CFD) back analysis. International journal of environmental research and public health, 2016, vol. 13, no. 10, p. 1014. (In Eng.).

A. A. Tarantsev, S. A. Kondratyev, M. D. Ruzmanov, D. V. Khimchuk. Software modeling for solving problems of ensuring fire safety in tunnels. Military Engineer, 2022, no. 1(23), pp. 57–63. (In Russ.).

F. J. Ulm, P. Acker, M. Lévy. The “Chunnel” fire. II: Analysis of concrete damage. Journal of engineering mechanics, 1999, vol. 125, no. 3, pp. 283–289. (In Eng.).

C. Feist, M. Aschaber, G. Hofstetter. Numerical simulation of the load-carrying behavior of RC tunnel structures exposed to fire. Finite elements in analysis and design, 2009, vol. 45, no. 12, pp. С. 958–965. (In Eng.).

A. Amouzandeh, M. Zeiml, R. Lackner. Real-scale CFD simulations of fire in single-and double-track railway tunnels of arched and rectangular shape under different ventilation conditions. Engineering structures, 2014, vol. 77, pp. 193–206. (In Eng.).

N. Hua, N. E. Khorasani, A. Tessari. Numerical modeling of the fire behavior of reinforced concrete tunnel slabs during heating and cooling. Engineering Structures, 2022, vol. 258, pp. 114135. (In Eng.).

I. V. Lugin, E. L. Alferova. Heat and mass transfer processes during train combustion in a single-track metro tunnel. Mining Information and Analytical Bulletin (scientific and technical journal), 2015, no. 7, pp. 324–332. (In Russ.).

A. Caner, A. Böncü. Structural fire safety of circular concrete railroad tunnel linings. Journal of structural engineering, 2009, vol. 135, no. 9, pp. 1081–1092. (In Eng.).

A.V. Shalimov et al. Modeling the dynamics of thermal depressions and its influence on the ventilation of mine workings. Subsoil use, 2014, no. 12, pp. 41–47. (In Russ.).

N. Hua, N. Elhami-Khorasani, A. Tessari. Review of tunnel fire damage assessment methods and techniques. Transportation research record, 2021, vol. 2675, no. 5, pp. 279-290. (In Eng.).

Recommendations for standardization. Information technologies for product life cycle support. Functional modeling methodology: GOST R 50.1.028-2001. SPS “ConsultantPlus”. (In Russ.).

Fire Dynamics Simulator. Technical Reference Guide, Volume 3: Validation. NIST Special Publication 1018-3, 2023. (In Eng.).

D. A. Ozersky, A. I. Orlova. Strength characteristics of rock and their analysis in the construction safety assessment of underground URF structures. Radioactive waste, 2023, no. 1(22), pp. 70–76. (In Russ.).

Pyrosim 2023.3. User guide. FireCat – pyrosim.ru : website. – URL: https://www.pyrosim.ru/download/Pyrosim_manual.pdf (date of the application: 01.05.2024). (In Russ.).

Yu. A. Koshmarov. Forecasting hazardous factors of indoor fire. State Fire Academy EMERCOM of Russia, 2005, 118 p. (In Russ.).

K. Degtyarev. Heat of the Earth. Science and Life, 2013, no. 9, pp. 27–36. (In Russ.).

Set of rules. Construction climatology: SP 131.13330.2020. SPS “ConsultantPlus”. (In Russ.).

E. Yu. Troyak, E. S. Melnikova. Study of the microstructure of the well core of the underground research laboratory of the Yenisei site under thermal influence, in Monitoring, modeling and forecasting of hazardous natural phenomena and emergency situations: Collection of materials of the International Scientific and Practical Conference, 2023, pp. 41–45. (In Russ.).

I. N. Pozharkova. Analysis of problems and methods for mathematical modeling of fires in tunnel structures. Engineering journal of Don, 2024, no. 5(113), pp. 1–15. (In Russ.).


Refbacks

  • There are currently no refbacks.


Abava  Кибербезопасность MoNeTec 2024

ISSN: 2307-8162