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Science and Technology and Nuclear Installations Volume 2011 ,2101-12-12
Experimental Validation of RELAP5 and TRACE5 for Licensing Studies of the Boron Injection System of Atucha II
Research Article
Alejandro I. Lazarte 1 William Fullmer 2 Martín Bertodano 2
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DOI:10.1155/2011/693245
Received 2010-08-04, accepted for publication 2010-11-16, Published 2010-11-16
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摘要

This paper presents an experimental validation of RELAP5 and TRACE5 for licensing studies of the Atucha II-PHWR nuclear power plant. A scaled experimental facility, representing the boron injection system of Atucha II, was built. The system has a fundamental importance for loss of coolant accidents (LOCA) and anticipated transients without scram (ATWS). The experiment consists of the discharge of a tank that represents the boron tank filled with air or a mixture of air-water onto a discharge tank that represents the moderator tank. Both tanks are connected by a pipe which includes a valve and an orifice plate to model the pressure losses due to the fittings in the real system. The pressure and water level measured in the tanks are compared with the RELAP5 and TRACE5 predictions. The codes predict the pressure in the tanks accurately. However, both codes overpredict the heat transfer in the boron tank air-water interface which produces a greater expansion of the air which leads to a small discrepancy in the boron tank level prediction.

授权许可

Copyright © 2011 Alejandro I. Lazarte et al. 2011
This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

图表

Diagram of JDJ boron injection system.

Diagram of the experiment and instrumentation.

Front view of tanks.

RELAP5 nodalization of the experiment.

14 bar air test, boron tank pressure in RELAP5 pipe model.

14 bar air test, moderator tank pressure in RELAP5 pipe model.

14 bar air test, boron tank pressure in TRACE5 pipe model.

14 bar air test, moderator tank pressure in TRACE5 pipe model.

14 bar air test, velocity in the orifice plate in RELAP5 and TRACE5 pipe model.

9 bar valve test, boron tank pressure for 3 roughnesses in RELAP5 pipe model.

9 bar valve test, moderator tank pressure for 3 roughnesses in RELAP5 pipe model.

9 bar valve test, boron tank water level in RELAP5 pipe model.

9 bar valve test, boron tank pressure for 3 roughnesses in TRACE5 pipe model.

9 bar valve test, moderator tank pressure for 3 roughnesses in TRACE5 pipe model.

9 bar valve test, boron tank water level in TRACE5 pipe model.

9 bar valve test, fluid discharge velocity in RELAP5 and TRACE5 pipe model.

9 bar valve test, boron tank pressure as function of free air volume in RELAP5 and TRACE5 pipe model (P&V diagram).

9 bar valve test, node gas temperature in the boron tank in RELAP5 pipe model.

9 bar valve test, node gas temperature in the boron tank in TRACE5 pipe model.

Schematic of control volumes.

Initial pressure in boron tank for air-water case in Table 1.

Initial water velocity for air-water case in Table 1.

Long-term pressure in boron tank for air-water case in Table 1.

Long-term level in boron tank for air-water case in Table 1.

通讯作者

Alejandro I. Lazarte.Nuclear Regulatory Authority of Argentina, Buenos Aires, C1429BNP, Argentina, arn.gov.ar.alazarte@arn.gob.ar

推荐引用方式

Alejandro I. Lazarte,William Fullmer,Martín Bertodano. Experimental Validation of RELAP5 and TRACE5 for Licensing Studies of the Boron Injection System of Atucha II. Science and Technology and Nuclear Installations ,Vol.2011(2101)

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参考文献
[1] M. Ishii, S. T. Revankar, T. Leonardi, R. Dowlati. et al.(1998). The three-level scaling approach with application to the Purdue University Multi-Dimensional Integral Test Assembly (PUMA). Nuclear Engineering and Design.186(1-2):177-211.
[2] (February 2009). CSAU-BEPU statistical methods for sensitivity and uncertainty analysis of atucha ii loss of coolant accidents using relap5. Purdue Report(OZ622A)
[3] S Wolfram. (1999). The Mathematica Book
[4] G. Salom. CNA II: Modelo Hidraulico Del Sistema De Inyeccion De Boro De Emergencia (JDJ).
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