ML19330A298
| ML19330A298 | |
| Person / Time | |
|---|---|
| Site: | Prairie Island  |
| Issue date: | 07/01/1980 |
| From: | Martin R Office of Nuclear Reactor Regulation |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8007170076 | |
| Download: ML19330A298 (7) | |
Text
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k UNITED STATES
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NUCLEAR REGULATORY COMMISSION E
WASHINGTON, D. C. 20555 July 1, 1980
+....
Dockets Nos 50-28 and
-306 LICENSEE: Northern States Power Company (NSP)
FACILITY: Prairie Island Nuclear Generating Plant, Units Nos. 1 and 2
SUBJECT:
SutHARY OF THE MEETING HELD ON MAY 20, 1980 TO DISCUSS THE TOPROD FUEL DESIGN FOR THE PRAIRIE ISLAND PLANT (PI)
On May 20, 1980 representatives of NSP and the Exxon Nuclear Corporation (ENC) met with the NRC staff to discuss the design of fuel assemblies to be put into future reloads of the PI Plant. Attendees are listed in Enclosure 1.
The meeting was held at the request of NSP for the purpose of advising the staff of the NSP plans to introduce a modified fuel assembly design into future reloads of the PI Plant. At present, Unit No. 1 has 16 Exxon fuel assemblies with four gadolinia bearing fuel pins (one weight percent gadolinia) per assembly. Unit No. 2 has 24 Exxon fuel assemblies with four gadolinia bearing fuel pins (one weight percent gadolinia) per assembly.
It is planned to put into Unit No.1 in the late 1981 reload 40 assemblies, 20 of which will have from four to eight gadolinia pins per assembly with four weight percent gado11nia. The Unit No. 2 ceload for early 1981 will include fcur fuel assemblies which have from fou" to eight gadolinia pins /
assembly of four weight percent gadolinia.
The fuel pellets on the upper and lower six inches of the active fuel assembly length will consist of naturally enriched U02.
The topics discussed in the meeting are outlined on the enclosed agenda. A brief comparison of the TOPROD fuel design to the present PI and to the present Palisades fuel design is also enclosed. Based on the information provided in the
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meeting, the staff did not identify technical problems with the proposed fuel design. The information supporting this change in fuel design for the PI Plant will be submitted in future documents to be prepared by ENC and in the NSP reload application. These documents and the proposed schedule for their sub-mittal are also identified in the enclosure.
R. Martin, Project Manager Operating Reactors Branch #3 Division of Licensing
Enclosures:
As stated cc w/enclosdres:
See last page l
l 80071700 %
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Enclosura 1 t%Y 20,1980 PRAIRIE ISLAND MEETING ATTENDEES NRC ENC NSP R. Martin Ja:nes N. Morgan Joseph A. Bonyeau Daniel Freno Finn B. Silogen Roger 0. Anderson W. L. Brooks G. Owsley Harry Balukjian D. H. Timmons R. A. Clark W. S. Nechodom 4
Paul Boehnert Douglas J. Cook T. M. Novak Lambros Lois M. Tokar R. O. Payer P
M. Dunenfeld AGENDA EXXON TOPROD DESIGN MAY 20, 1980 MEETING 1.
Introduction J. A. Gonyeau, NSP
. Reason for the program
. Differences bet veen existing and proposed fuel type
. Schedule 2.
Description J. Morgan, ENC
. Thennal hydraulic basis
. Gadolinium oxide material basis
. Fuel design & experience 3.
Neutronics F. Skogen, ENC
. Power shapes & experience
. Operating / economic incentives 4.
Licensing G. Owsley, ENC
. Documentation
. Schedules PRAIRIE ISLAND UNITS 1 AND 2
SUMMARY
OF CURRENT AND TOPR00 DESIGN PARAMETERS Current TOPR00 Mechanical Design -
Design
- Design Cladding 00 (in.)
0.426 0.417 CladdingThickness(in.)
0.031 0.0295 Pellet 00 (in.)
0.3565 0.3505 Diametral Gap (in.)
0.0075 0.0075 Pellet Density (% TD) 94.0 94.0 Fuel Rod Pitch (in.)
0.556 0.556 Neutronics Design Active Fuel Length (in.)
144.0 144.0 Natural U0 Axial Blankets None 6" top and bottom 2
all, fuel rods Cell Water / Fuel Volume Ratio 1.67 1.79**
UO Rod Enrichment, % U-235 3.47 3.78 2
UO -Gd 0 Rod Enrichment 2
23
% U-235 3.10%
2.52%
% Gd 0 1.0%
4.0%
23 Prairie Island 1 XN-2 Reload.
1.76 for ENC W 15 x 15 Reloads.
_ _. Enclosuro 3 COMPARISON OF TOPROD AND PALISADES H DESIGN PARAMETERS P. I.
TOPROD Mechanical Design,,
Design Palisades H Cladding OD (in.)
0.417 0.417 CladdingThickness(in.)
0.0295 0.0295*
Pellet OD (in.)
0.3505 0.3500 DiametralGap(in.)
0.0075 O.0080 Pellet Density (% TD) 94.0 94.0 Fuel Rod Pitch (in.)
0.556 0.550 Neutronics Design Active Fuel Length (in.)'
144.0 131.8
~
Natural UO Axial Blankets 6" top and bottom None 2
all fuel rods 1.72~
Cell Water / Fuel Volume Ratio 1.79*
3.27**
U0 Rod Enrichment, % U-235 3.78 2
j U0 'id 0 Rod Enrichment 2
23 2.52
% U-235 2.52
% Gd 0 4.0 4.0 23 1.76 for ENC W 15 x 15 Reloads.
Average rod eiirichment per assembly.
We W
y
LICENSING SCHEDULE IMPLEMENTATION OF TOPROD e
ENC SUBMIT TOPICAL REPORTS SEPTEMBER 1980 1)
GD-UO2 MATERIALS PROPERTIES 2)
PWR NEUTRONIC METHODS WITH GD o
PRELIMINARY DISCUSSIONS NRC/ ENC TO ASSESS ACCEPTABILITY OF GD IN PWRS OCTOBER 1980 o
NSP SUBMIT 1981 RELOAD APPLICATION DASED ON GENERIC ANALYSIS OF FULLY TOPROD LOADED CORE NOVEfjB,ER 1980 e
PRELIMINARY DISCUSSIONS NRC/NSP/ ENC TO ASSESS TOPROD ACCEPTABILITY DECEMBER 1930 o
NRC APPROVAL - P.I. #1 OPERATION WITH TOPROD RELOAD MARCH 1981 e
P.I. #2 STARTUP WITH f1 TOPROD LEAD ASSEMBLIES MARCH 1981 e
P.I. #1 STARTUP WITH TOPROD RELOAD OCTOBER 1981 m
-%ee see w s a e
- e -
- m W e.
MEETING
SUMMARY
' DISTRIBUTION Licensee: Northern States Power Company
- copies also sent to members of the service (cc) list for this plant H. Denton E. G. Case Docket File NRC PD1 L PDf4 TERA NSIC
. ORB #4 Rdg NRR Rdg DEisenhut /RPurple RTedesco TNovak Glainas ORB Branch Chiefs (5)
ORB Project Manager-BMartin ORB Licensing Assistant-PKreutzer OELD AE0D IE-3 RFraley, ACRS-16 Program Support Branch Meeting Summary File NRC Participants DFreno WLBrooks HBalukjian PBoehnert LLois MTokar F0Meyer
>0unenfeld
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