DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: A knowledge gap analysis for transient CHF prediction within RELAP5-3D

Journal Article · · Nuclear Engineering and Design

Here we compare several experimental pool and flow boiling critical heat flux experiments with corresponding computational models developed with RELAP5-3D. Encompassed within this paper are several sensitivity analyses for the boiling heat transfer correlations, critical heat flux (CHF) prediction within RELAP5-3D and the thermal properties of the cladding for experiments in the Transient Reactor Test Loop (TRTL) and Transient Reactor Test (TREAT) facilities. The sensitivity analyses were consistent in determining that there is a large contribution from the critical heat flux multiplier which in this application, accounts for the effects of power transient critical heat flux. Comparison to experimental results of both the TREAT CHF-SERTTA experimental campaign and a University of New Mexico (UNM) pool boiling experimental campaign demonstrate both the under-prediction of transient CHF and nucleate boiling heat transfer. To address the gaps in knowledge regarding the transient heating effect for both boiling heat transfer and CHF prediction, we present an experimental test matrix for the TRTL facility that will isolate the power transient effect under PWR relevant operational conditions. The test matrix will incorporate 6 power pulses with a constant energy deposition and a timescale that spans over several orders of magnitude, including a steady state test with an exponential period of 10 s.

Research Organization:
Idaho National Laboratory (INL), Idaho Falls, ID (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC07-05ID14517; NE0009213
OSTI ID:
2426947
Report Number(s):
INL/JOU-24-79451-Rev000
Journal Information:
Nuclear Engineering and Design, Journal Name: Nuclear Engineering and Design Journal Issue: - Vol. 422; ISSN 0029-5493
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (43)

The 1995 look-up table for critical heat flux in tubes journal June 1996
Halden reactors IFA-511.2 and IFA-54x: Experimental series under adverse core cooling conditions journal July 1995
Effusivity-based correlation of surface property effects in pool boiling CHF of dielectric liquids journal September 2003
Mechanisms of transitions to film boiling at CHFs in subcooled and pressurized liquids due to steady and increasing heat inputs journal May 2000
Effects of heater-side factors on the saturated pool boiling critical heat flux journal July 1997
Effective use of Pearson's product–moment correlation coefficient journal July 2014
Sensitivity analysis of in-pile critical heat flux experiments in TREAT for characterization of RIA power-transient effects journal October 2021
Sensitivity analysis of in-pile CHF experiments in the TREAT facility: Characterization of impacts of fuel system thermal properties journal January 2022
Why ionizing radiation enhances surface wettability journal June 2020
Radiation induced surface activation on Leidenfrost and quenching phenomena journal March 2005
Experimental investigation of heat transfer in transient boiling journal May 2014
Saturated pool boiling of FC-72 from enhanced surfaces produced by Selective Laser Melting journal August 2016
Critical heat flux enhancement in downward-facing pool boiling with radiation induced surface activation effect journal June 2017
Pool boiling critical heat flux (CHF) – Part 1: Review of mechanisms, models, and correlations journal February 2018
Towards understanding the effects of irradiation on quenching heat transfer journal December 2018
Flow boiling transient critical heat flux tests with stainless steel and FeCrAl: Transient correlation implementation, model calibration, and sensitivity analysis journal November 2021
Steady-state pool boiling heat transfer experimental studies of horizontally-placed tubes journal November 2022
Comparison of experimental and simulated critical heat flux tests with various cladding alloys: Sensitivity of iron-chromium-aluminum (FeCrAl) to heat transfer coefficients and material properties journal November 2019
Design of separate-effects In-Pile transient boiling experiments at the TREAT Facility journal October 2022
Steady-state and power transient critical heat flux experiments of FeCrAl and Zircaloy claddings under saturated pool boiling journal August 2023
A non-fueled nuclear-heated rod for in-pile transient boiling studies journal December 2023
Prediction of critical heat flux in non-uniform heated rod bundle based on modified CHF empirical correlations journal February 2024
Predicting Critical Heat Flux in Rectangular Channels: Which Correlation to Trust? journal March 2024
Review of pool boiling critical heat flux (CHF) and heater rod design for CHF experiments in TREAT journal May 2020
Integral and Separate Effects Test Facilities To Support Water Cooled Small Modular Reactors: A Review journal June 2023
Correlation for Boiling Heat Transfer to Saturated Fluids in Convective Flow journal July 1966
Separate effects of surface roughness, wettability, and porosity on the boiling critical heat flux journal July 2013
Investigation of radiation-induced surface activation effect in austenitic stainless steel under ultraviolet and γ-ray irradiations journal January 2019
Developing Separate Effects Transient Test Experiments Using an Out-of-Pile Flowing Water Loop journal March 2020
A Novel Method for Predicting Power Transient CHF via the Heterogeneous Spontaneous Nucleation Trigger Mechanism journal March 2020
1986 AECL-UO Critical Heat Flux Lookup Table journal January 1986
Non-Hydrodynamic Aspects of Pool Boiling Burnout journal March 1967
Development of In-Reactor Fuel Behavior Observation System journal June 1981
Modelling of Clad-to-Coolant Heat Transfer for RIA Applications journal February 2007
A Theoretical Model to Predict Pool Boiling CHF Incorporating Effects of Contact Angle and Orientation journal April 2001
Transient Critical Heat Fluxes of Subcooled Water Flow Boiling in a Short Vertical Tube Caused by Exponentially Increasing Heat Inputs journal April 2008
Unifying the Controlling Mechanisms for the Critical Heat Flux and Quenching: The Ability of Liquid to Contact the Hot Surface journal November 1992
Effect of Thermophysical Properties of the Heater Substrate on Critical Heat Flux in Pool Boiling journal June 2017
Radiation Induced Surface Activity Phenomenon: 2nd Report — Radiation Induced Boiling Enhancement conference January 2002
Radiation Induced Surface Activity Phenomenon: 1st Report — Surface Wettability on Metal Oxides conference January 2002
Calculation of Critical Heat Flux Using an Inverse Heat Transfer Method to Support TREAT Experiment Analysis conference August 2020
Correlation Coefficients: Appropriate Use and Interpretation journal January 2018
Sensitivity Analysis of Transient Critical Heat Flux Phenomena Within RELAP5-3D in the Transient Reactor Test Loop conference January 2023