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Title: Simulation of 1% hot leg SBLOCA with TRACE5

Abstract

During a Small Break Loss-of-Coolant Accident (SBLOCA) transient, depressurization can be slow enough to delay the Accumulators (ACC) entry for a long time. Actuation of High Pressure Injection (HPI) system is then necessary in order to maintain the core temperature low enough to avoid core boil off, and consequently avoiding the core level to fall below fuel rods level, thus producing a temperature trip in the fuel cladding. In this frame, the OECD/NEA ROSA Project Test 1.2 (SB-HL-17 in Japan Atomic Energy Agency (JAEA)) has been simulated using the thermal-hydraulic code TRACES. Test 1.2 was performed in the Large Scale Test Facility (LSTF) reproducing a 1% hot leg SBLOCA in a Pressurized Water Reactor (PWR). A comparison between experimental and the main simulated variables was performed to study the effect of important parameters (liquid stratification, geometry and size) to model the break. Finally, in an Emergency Core Cooling System (ECCS) failure scenario, loss of coolant is large enough to produce core boil-off and a Peak Cladding Temperature (PCT) excursion. With this purpose a sensitivity analysis varying the HPI mass flow rate has been performed covering the range between HPI actuation and failure. (authors)

Authors:
; ;  [1]
  1. Universitat Poltecnica de Valencia, Cami de Vera s/n, Valencia (Spain)
Publication Date:
Research Org.:
American Nuclear Society, 555 North Kensington Avenue, La Grange Park, IL 60526 (United States)
OSTI Identifier:
22107794
Resource Type:
Conference
Resource Relation:
Conference: ICAPP '12: 2012 International Congress on Advances in Nuclear Power Plants, Chicago, IL (United States), 24-28 Jun 2012; Other Information: Country of input: France; 8 refs.; Related Information: In: Proceedings of the 2012 International Congress on Advances in Nuclear Power Plants - ICAPP '12| 2799 p.
Country of Publication:
United States
Language:
English
Subject:
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; 97 MATHEMATICAL METHODS AND COMPUTING; CLADDING; COMPARATIVE EVALUATIONS; COMPUTERIZED SIMULATION; COOLANTS; DEPRESSURIZATION; ECCS; EXCURSIONS; FLOW RATE; FUEL RODS; GEOMETRY; INJECTION; JAEA; LOSS OF COOLANT; NUCLEAR ENERGY; NUCLEAR POWER PLANTS; PRESSURE RANGE MEGA PA 10-100; PWR TYPE REACTORS; SENSITIVITY ANALYSIS; TEST FACILITIES; THERMAL HYDRAULICS

Citation Formats

Gallardo, S., Querol, A., and Veru, G. Simulation of 1% hot leg SBLOCA with TRACE5. United States: N. p., 2012. Web.
Gallardo, S., Querol, A., & Veru, G. Simulation of 1% hot leg SBLOCA with TRACE5. United States.
Gallardo, S., Querol, A., and Veru, G. Sun . "Simulation of 1% hot leg SBLOCA with TRACE5". United States.
@article{osti_22107794,
title = {Simulation of 1% hot leg SBLOCA with TRACE5},
author = {Gallardo, S. and Querol, A. and Veru, G.},
abstractNote = {During a Small Break Loss-of-Coolant Accident (SBLOCA) transient, depressurization can be slow enough to delay the Accumulators (ACC) entry for a long time. Actuation of High Pressure Injection (HPI) system is then necessary in order to maintain the core temperature low enough to avoid core boil off, and consequently avoiding the core level to fall below fuel rods level, thus producing a temperature trip in the fuel cladding. In this frame, the OECD/NEA ROSA Project Test 1.2 (SB-HL-17 in Japan Atomic Energy Agency (JAEA)) has been simulated using the thermal-hydraulic code TRACES. Test 1.2 was performed in the Large Scale Test Facility (LSTF) reproducing a 1% hot leg SBLOCA in a Pressurized Water Reactor (PWR). A comparison between experimental and the main simulated variables was performed to study the effect of important parameters (liquid stratification, geometry and size) to model the break. Finally, in an Emergency Core Cooling System (ECCS) failure scenario, loss of coolant is large enough to produce core boil-off and a Peak Cladding Temperature (PCT) excursion. With this purpose a sensitivity analysis varying the HPI mass flow rate has been performed covering the range between HPI actuation and failure. (authors)},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2012},
month = {7}
}

Conference:
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