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Loss of coolant accident analysis under restriction of reverse flow

  • Radaideh, Majdi I. (Department of Nuclear, Plasma and Radiological Engineering, University of Illinois at Urbana-Champaign, Talbot Laboratory) ;
  • Kozlowski, Tomasz (Department of Nuclear, Plasma and Radiological Engineering, University of Illinois at Urbana-Champaign, Talbot Laboratory) ;
  • Farawila, Yousef M. (Farawila et al., Inc.)
  • Received : 2018.11.12
  • Accepted : 2019.04.16
  • Published : 2019.09.25

Abstract

This paper analyzes a new method for reducing boiling water reactor fuel temperature during a Loss of Coolant Accident (LOCA). The method uses a device called Reverse Flow Restriction Device (RFRD) at the inlet of fuel bundles in the core to prevent coolant loss from the bundle inlet due to the reverse flow after a large break in the recirculation loop. The device allows for flow in the forward direction which occurs during normal operation, while after the break, the RFRD device changes its status to prevent reverse flow. In this paper, a detailed simulation of LOCA has been carried out using the U.S. NRC's TRACE code to investigate the effect of RFRD on the flow rate as well as peak clad temperature of BWR fuel bundles during three different LOCA scenarios: small break LOCA (25% LOCA), large break LOCA (100% LOCA), and double-ended guillotine break (200% LOCA). The results demonstrated that the device could substantially block flow reversal in fuel bundles during LOCA, allowing for coolant to remain in the core during the coolant blowdown phase. The device can retain additional cooling water after activating the emergency systems, which maintains the peak clad temperature at lower levels. Moreover, the RFRD achieved the reflood phase (when the saturation temperature of the clad is restored) earlier than without the RFRD.

Keywords

References

  1. K. Pettersson, H. Chung, M. Billone, T. Fuketa, F. Nagase, C. Grandjean, Nuclear Fuel Behaviour in Loss-Of-Coolant Accident (LOCA) Conditions, Nuclear Energy Agency, Organisation for Economic Co-Operation and Development., 2009.
  2. S. Bajorek, TRACE V5. 0 Theory Manual, Field Equations, Solution Methods and Physical Models, U.S. Nuclear Regulatory Commission, 2008.
  3. C. Queral, J. Montero-Mayorga, J. Gonzalez-Cadelo, G. Jimenez, AP1000${(R)}$ Large-Break LOCA BEPU analysis with TRACE code, Ann. Nucl. Energy 85 (2015) 576-589, https://doi.org/10.1016/j.anucene.2015.06.011.
  4. J. Montero-Mayorga, C. Queral, J. Gonzalez-Cadelo, AP1000${(R)}$ SBLOCA simulations with TRACE code, Ann. Nucl. Energy 75 (2015) 87-100, https://doi.org/10.1016/j.anucene.2014.07.045.
  5. C.-Y. Chen, C. Shih, J.-R. Wang, The alternate mitigation strategies on the extreme event of the LOCA and the SBO with the TRACE Chinshan BWR4 model, Nucl. Eng. Des. 256 (2013) 332-340, https://doi.org/10.1016/j.nucengdes.2012.08.029.
  6. J. Cho, J.H. Park, D.S. Kim, H.G. Lim, Quantification of LOCA core damage frequency based on thermal-hydraulics analysis, Nucl. Eng. Des. 315 (2017) 77-92, https://doi.org/10.1016/j.nucengdes.2017.02.023.
  7. T. Mui, T. Kozlowski, Confirmation of Wilks' method applied to TRACE model of boiling water reactor spray cooling experiment, Ann. Nucl. Energy 117 (2018) 53-59, https://doi.org/10.1016/j.anucene.2018.03.011.
  8. M. Prasad, R.S. Rao, S.K. Gupta, Assessment methodology for confidence in safety margin for large break loss of coolant accident sequences, Ann. Nucl. Energy 38 (2011) 1225-1230, https://doi.org/10.1016/j.anucene.2011.02.015.
  9. F. Sanchez-saez, S. Carlos, J.F. Villanueva, A.I. Sanchez, S. Martorell, Uncertainty analysis of PKL SBLOCA G7 . 1 test simulation using TRACE with Wilks and GAM surrogate methods, Nucl. Eng. Des. 319 (2017) 61-72, https://doi.org/10.1016/j.nucengdes.2017.04.037.
  10. E. Boafo, H.A. Gabbar, Stochastic uncertainty quantification for safety verification applications in nuclear power plants, Ann. Nucl. Energy 113 (2018) 399-408, https://doi.org/10.1016/j.anucene.2017.11.041.
  11. Y.M. Farawila, Floating filter screen in a lower tie plate box of a nuclear fuel assembly, U.S. Patent Application 10/176,897, filed January 8, 2019.
  12. Y.M. Farawila, Method and Fuel Design to Stabilize Boiling Water Reactors, 14/997, 2017, p. 557, filed July 20.
  13. M.I. Radaideh, Analysis of Reverse Flow Restriction Device to Prevent Fuel Dryout during Loss of Coolant and Instability Accidents of Boiling Water Reactors, Master Thesis, University of Illinois at Urbana Champaign, 2016.
  14. Y.M. Farawila, A method to prevent severe power and flow oscillations in boiling water reactors, in: Proc. 16th Int. Top. Meet. Nucl. React. Therm. Hydraul. NURETH-16, Chicago, Illinois, Aug 30-Sep 4, 2015.
  15. M.I. Radaideh, T. Kozlowski, Y.M. Farawila, Analysis of reverse flow restriction device to prevent fuel dryout damage during boiling water reactor instability, Phys. React. 5 (2016) 3130-3139 (PHYSOR 2016), Sun Valley, Idaho, May 1- 5, 2016.

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