The State-of-the-Art Theory and Applications of Best-Estimate Plus Uncertainty Methods

Prošek, Andrej; Mavko, Borut

doi:10.13182/nt07-1

Cited by 32 publications

(19 citation statements)

References 17 publications

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“…For the same PWR plants, the calculated 95th percentile PCT (peak clad temperature) value is reduced by 126 K with the ASTRUM method, comparing with the value obtained from the 1996 BELOCA method. Almost all of demonstration applications of BEPU methods so far are for LOCA including both LB-LOCA and SB-LOCA (small break LOCA) and most of licensing applications of BEPU methods are for LBLOCA [5].…”

Section: Overview Of Csau and Bepumentioning

confidence: 99%

“…[5] Because of demanding calculation requirements, the MC method is currently not applicable to complex thermal-hydraulic codes. In the RS methods the RS replaces the code calculation in the MC analysis.…”

Section: Major Steps Of Csaumentioning

confidence: 99%

“…Using biases brings additional uncertainty on uncertainty qualification process. Although large amount of efforts have been used to improve CSAU methodology as summarized by [5], the above issues still exist.…”

Section: Limitations Of Current Csau Practicesmentioning

confidence: 99%

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Use of forward sensitivity analysis method to improve code scaling, applicability, and uncertainty (CSAU) methodology

Zhao

Mousseau

2012

Nuclear Engineering and Design

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Section: Overview Of Csau and Bepumentioning

confidence: 99%

Section: Major Steps Of Csaumentioning

confidence: 99%

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Use of forward sensitivity analysis method to improve code scaling, applicability, and uncertainty (CSAU) methodology

Zhao

Mousseau

2012

Nuclear Engineering and Design

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“…The traditional approach [5] to uncertainty quantification is based on a "black box" approach. The simulation tool is treated as an unknown signal generator, a distribution of inputs according to assumed probability density functions is sent in and the distribution of the outputs is measured and correlated back to the original input distribution.…”

Section: Introductionmentioning

confidence: 99%

Extended Forward Sensitivity Analysis for Uncertainty Quantification

Zhao

Mousseau

2013

Nuclear Technology

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“…Nevertheless, the partially conservative approach requires proper boundary and initial conditions, which for different phenomena during the accidents can differ. The uncertainty analysis was performed using on the statistical tools based the GRS developed methodology (package SUSA) [93]. …”

mentioning

confidence: 99%

Framework and Strategies for the Introduction of Best Estimate Models Into the Licensing Process

Sollima

Petrangeli

D'Auria

et al. 2009

Volume 4: Codes, Standards, Licensing and Regulatory Issues; Student Paper Competition

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SOMMARIO. SBO and SBLOCA .................................. 48 4.2.4.1.3. Results of the analysis ......................................................... 49 4.2.4.1.4. Decay heat power ................................................................ 49 4.2.4.1.5. Hot rod temperature............................................................. 55 4.2.4.1.6. Analysis of the results .......................................................... 57 4.2.4.1.7. Conclusion ........................................................................... distribution..................... 59 4.2.4.2.3. Model and calculation cases................................................ 60 4.2.4.2.4. Evaluation of the cell probability .......................................... 61 4.2.4.2.5 LIST OF SYMBOLS U (1979) with 1973 ...................................................................................................... 70 Fig. 55 -LARGE reactor sin, 100 s, produced and absorbed power versus height fine model....................................................................................................... 70 Fig. 56 -CHF comparison, 7 MPa (RELAP5/Mod 2)............................................. 73 Fig. 57 -CHF Comparison 3 MPa (RELAP5/Mod2) .............................................. 73 Fig. 58 -LOFT: core cross flow model................................................................... 76 Fig. 59 -LOFT: core temperature .......................................................................... 76 Fig. 60 -LOFT: core mass flow ............................................................................. 77 Fig. 61 -PWR-1000: core cross flow model .......................................................... 78 Fig. 62 -PWR-1000: core temperature comparison.............................................. 79 Fig. 63 -PWR-1000 ...................................... 136 Fig. A.11 -Schematic processes in the Swedish reactor licensing program....... 137 Fig. A.12 -Schematic of steps in the Swedish reactor licensing program .......... 138 Fig. A.13 -VVER 1000, Steady State: Up and SGs (1 to 4) pressure ................ 143 Fig. A.14 -VVER 1000, Steady State: Core inlet mass flowrate......................... 144 Fig. A.15 -VVER 1000, Steady State: Core and SG exchanged power ............. 144 Fig. A.16 -VVER 1000 1 (up to 11000s)........ 160 Fig. A.44 -Pressure in the upper plenum in the transient 2 (up to 8000s).......... 160 Fig. A.45 -Pressure in the upper plenum in the transient 1 (up to 1200s).......... 161 Fig. A.46 -Pressure in the upper plenum in the transient 2 (up to 1200s).......... 161 Fig. A.47 -Model of the LOFT and PWR core..................................................... 163 XVIII LIST OF TABLES INTRODUCTIONSafety is an essential part for the peaceful use of nuclear power generation. The safety of nuclear power plants is based on the concept of defence in depth [1], Fig. 1, which indicates successive physical barriers (fuel matrix, cladding, primary system pressure boundary and ...

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The State-of-the-Art Theory and Applications of Best-Estimate Plus Uncertainty Methods

Cited by 32 publications

References 17 publications

Use of forward sensitivity analysis method to improve code scaling, applicability, and uncertainty (CSAU) methodology

Use of forward sensitivity analysis method to improve code scaling, applicability, and uncertainty (CSAU) methodology

Extended Forward Sensitivity Analysis for Uncertainty Quantification

Framework and Strategies for the Introduction of Best Estimate Models Into the Licensing Process

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