ML20077A563
| ML20077A563 | |
| Person / Time | |
|---|---|
| Site: | FitzPatrick  |
| Issue date: | 11/16/1994 |
| From: | SIEMENS POWER CORP. (FORMERLY SIEMENS NUCLEAR POWER |
| To: | |
| Shared Package | |
| ML19311B509 | List: |
| References | |
| NUDOCS 9411230323 | |
| Download: ML20077A563 (10) | |
Text
_--
. 1 to JPN-94-060 l
Atrium 10A Fuel Bundle Design Description Report for l
I New York Power Authority-James A. FitzPatrick Nuclear Power Plant t
l Reload 11/ Cycle 12 i
(Non-Proprietary Version) 9411230323 941116 POR ADOCK 05000333 P
Page5 James A. Fitzpatrick ATRIUM-10A Design Description The ATRIUM 10A fuel assembly consists of a lower tie plate and upper tie plate, 91 fuel rods, spacer grids, a central water channel, and miscellaneous assembly hardware. The structural members of the fuel assembly inc!ude the tie plates, spacer grids, water channel and connecting hardware. The ATRIUM-10A has a 10x10 fuel rod array with a total of 91 fuel rods.
A central, square water channel occupies the equivalent of nine fuel rod positions in the array.
The fuel reds are fabricated with cladding which has an internal zircenium liner, cf the 91 fuel rods are part-length fuel rods which have a length of acproximately of a full-length rod. The spacer grids are cf the ULTRAFLOW
- configuration.
Table 1 summarizes the features of the fuel assemcly. Figure 1 shows the fuel assembly design features. Figure 2 presents the axial zoning scheme for the assembly U235 enrichment and Figures 3,4,5 anc 6 shcw the individual pin enricnments for each nuclear lattice type.
A!I cf the design features of the James A. FitzPatrick ATRIUM-10A LFAs have been under irraciation en relcad er lead assemblies at other reactors.
There are three design features en the James A. FitzPatnck LFAs which have not previcusly acceared en SPC fuel assemblies irradiated in the U.S.; these are:
10x10 fuel red sttice configuration Partial length fuel rods 10x10 fuel rod lattice conficuration: The ATRIUM-10A has a 10x10 fuel rod array with a total of 91 fuel rods. A central, square water channel occupies the equivalent of nine fuel rod pasitions in the artt.y. The 10x10 array allows for operation at icwer average linear heat generation rates, and thus results in less fission gas release, as compared to 8x8 and 9x9 lattice arrays.
Partial lencth fuel rods:
of the 91 fuel rods are part-length fuel rods which have a length of approximately of a full-length rod. The partiallength rods reduce the total and two-phase pressure drop in the ATRIUM-10A assembly, thus improving the stability performance.
'ULTRAFLOW is a trademark of Siemens.
Page 6 Table 1 Fuel Assembly Characteristics u
Characteristic Material Value Fuel Assembly Array Number of fuel rods Full-length rocs Part-length rods Number of inert rods Overall length, inches (mm)
Number of spacers Fuel red pitch,inen (mm)
Fuel red to fuel red spacing, inen (mm) l Spacer Grid Envelope, inch (mm)
Height, inen (mm)
Water Channel Outside dimension, inch (mm)
Channel wall thickness, inch (mm)
Channel length, inen (mm) l Lower Tie Plate Envelope, inch (mm) i Height, inch (mm)
Seal spring thickness, inen (mm)
Upper Tie Plate Envelope, inch (mm)
Height, inch (mm)
Upper Tie Plate Locking Hardware Bayonet bolt i
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Page 7 Table 1 Fuel Assembly Characteristics (Continued)
Characteristic Material Value Fuel Rod Cladding Cladding outside diameter, inch (mm)
Cladding inside diameter, inch (mm) j Overall length (.from lower tie plate), inch (mm)
Full-length rod Part-length rod i
Fuel eclumn Pellet outside diameter, inch (mm)
Active length, inch (mm)
Full-length red Part-length red Lcwer natural enrichment length. inch (mm)
Full-length rod Part-length red Upper natural enrichment length, incn (mm)
Full-iength rod Part-length red Percent theoretical density Fill gas pressure, psia (kPa)
Plenum spring Fuel Channel 1
Inside dimensicn, inch (mm)
Wall thickness (vanable), inch (mm)
Corners Mid-wall at bottom Mid-wall at top inside corner radius, inch (mm)
Overall length, inch (mm)
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Figure 1 ATRIUM
- 10A Fuel Assembly fcr Eoiling Water Reacters
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Figure 2 James A. Fit: Patrick ATRIUM-10A LFA Elevation View
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Figure 3 James A. FitzPatrick ATRIUM-10A BOT Lattice Enrichment Distribution 4
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1 Figuro 5 James A. FitzPatrick ATRIUM-10A SOM Lattice Enrichment Distribution
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'I Figure 6 James A. FitzPatrick ATRIUM-10A TOP Lattice enrn'chment Distribution
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