RSICC DATA PACKAGE DLC-209
1. NAME AND TITLE OF DATA LIBRARY
PWR-AXBUPRO-GKN: Measured Axial Burnup Profiles for NeckarWestheim PWR Reactors.
2. NAME AND TITLE OF DATA RETRIEVAL PROGRAMS
None included.
3. CONTRIBUTOR
Siemens AG Power Generation Group, Offenbach, Germany and, Gemeinschaftskraftwerk Neckar, Germany through the OECD NEA Data Bank, Issy-les-Moulineaux, France.
4. HISTORICAL BACKGROUND AND INFORMATION
This package contains the following measured PWR axial burnup shapes from NeckarWestheim 1 & 2 (GKN1 and GKN2) in subdirectory PWR-AXBUPRO-GKN12 and benchmarks on the effect of axial burnup shapes in subdirectory PWR-AXBUPRO-GKN2K.
PWR-AXBUPRO-GKN1 (square pitch lattice 15X15 - thermal Power 2497 MW) contains more than 700 EOC axial shapes from cycle 18 up. From cycle 18 to cycle 20, a change from an Out-In-Loading to an In-Out-Loading has taken place. Fuel assemblies up to number 1093 have spacer grids made of Inconel, whereas all the fuel assemblies from number 1094 up have spacer grids made of Zircaloy. Discharge burnups range from: 9.7 to 52.8 Mwd/kg.
PWR-AXBUPRO-GKN2 (square pitch lattice 18X18 - thermal Power 3850 MW) contains more than 500 EOC axial shapes from cycle 5 up: more than 170 shapes for an initial fuel enrichment of 3.5 wt.-% 235U, discharge burnup ranges from 16.3 to 44.4 Mwd/kg; more than 170 shapes for an initial fuel enrichment of 3.8 wt.-% 235U, discharge burnup ranges from 14.0 to 52.8 Mwd/kg; and more than 180 shapes for an initial fuel enrichment of 4.0 wt.-% 235U, discharge burnup ranges from 15.5 to 48.9 Mwd/kg.
In PWR-AXBUPRO-GKN2K, the shapes were gathered from the cycles 5 through 12 of NPP Neckarwestheim 2. All the shapes refer to EOCs. The shapes are derived from in-core 3D power density distribution measurements based on flux measurements. At 28 fuel assembly positions the flux data are monitored at 32 equidistant axial nodes. Thus, one has a total of 896 measuring points. These measurements are performed every fourteenth day. The measurements are performed with the aid of the Siemens/KWU's Aeroball System which has the advantage of monitoring simultaneously all the axial nodes. The high spatial resolution and the high frequency of the measurement campaigns as well as the accuracy of the measurement result in shapes of outstanding quality. For instance, the spatial resolution suffices to discriminate the flux dips caused by the presence of the spacer grids.
5. APPLICATION OF THE DATA
The database can be used in the study of the reactivity effects of axial burnup shapes.
6. SOURCE AND SCOPE OF DATA
PWR-AXBUPRO-GKN12 contains Axial Burnup Shapes released by Siemens AG Power Generation Group. It contains data sets relative to following NPP and initial enrichment:
- NPP Neckarwestheim 1, Fuel assemblies with an initial enrichment of 3.5 wt.-% 235U
- NPP Neckarwestheim 2, Fuel assemblies with an initial enrichment of 3.5 wt.-% 235U
- NPP Neckarwestheim 2, Fuel assemblies with an initial enrichment of 3.8 wt.-% 235U
- NPP Neckarwestheim 2, Fuel assemblies with an initial enrichment of 4.0 wt.-% 235U
PWR AXBUPRO-GKN2K contains a sample of 850 Axial Burnup Shapes released by Nuclear Power Plant Neckarwestheim II, Germany, on May 03, 2000 through Siemens AG Power Generation. All of these shapes belong to one and the same fuel assembly type, namely the Siemens Konvoi fuel assembly type FOCUS (TM).
7. DISCUSSION OF THE DATA RETRIEVAL PROGRAM
None included.
8. DATA FORMAT AND COMPUTER
ASCII format; IBM PC or other computer (D00209MNYCP00).
9. TYPICAL RUNNING TIME
Not applicable.
10. REFERENCES
a) Documentation available with library in electronic PDF format in D209.PDF
J-C. Neuber, "Measured Axial Burnup Shapes from Nuclear Power Plants Neckarwestheim 1 and Neckarwestheim 2," Siemens AG Power Generation Group (May 26, 1998).
J-C. Neuber, "Fuel assembly design data for GKN1 & 2" (May 26, 1998).
J-C. Neuber and T. Lamprecht, "Proposal for Phase II-C: Benchmark on the Effect of Axial Burnup Shapes," Siemens Nuclear Power Gmbh, Revision 1 (August 17, 2000).
b) Other useful documentation
J-C. Neuber, "Burnup Credit Applications to PWR and BWR Fuel Assembly Wet Storage System," International Conference on Physics of Nuclear Science and Technology" (October 1998).
A. Nouri, Analysis of Phase II-B Results: Conceptual PWR Spent Fuel Transportation Cask IPSN/98-05, NEA/NCS/DOC(98)1.
I. Endrizzi and C. Wenndorf, "PDD and Aeroball Improve Flexibility," Nuclear Engineering International (December 1990).
11. CONTENTS OF LIBRARY
The package is transmitted on a CD which includes the referenced documents in 10.a in file DOC\D209.PDF and the data in a 2MB self-extracting compressed, DOS file. After decompression, PWR-AXBUPRO-GKN12 and PWR-AXBUPRO-GKN2K directories will be created. They contain a total of 17 files with size about 4.93 MB.
12. DATE OF ABSTRACT
March 2001.
KEYWORDS: BURNUP; DATABASE; PWR