ML20117C769
| ML20117C769 | |
| Person / Time | |
|---|---|
| Site: | Prairie Island  |
| Issue date: | 08/22/1996 |
| From: | Wadley M NORTHERN STATES POWER CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9608280038 | |
| Download: ML20117C769 (5) | |
Text
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Northern States Power Company Prairie Island Nuclear Generating Plant 1717 Wakonado Dr. East i
Welch, Minnesota 55089 August 22,1996 10 CFR Part 50 Section 50.90 U S Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555 PRAIRIE ISLAND NUCLEAR GENERATING PLANT Docket Nos. 50-282 License Nos. DPR-42 50-306 DPR-60 i
Response to NRC Request For Additional Information Related to Moveable incore Detector Thimble Reduction License Amendment Reauest The attached information is being provided in response to an NRC Staff request for j
additional information related to our License Amendment Request dated July 15,1996, which proposed one-time only changes for Prairie Island Unit 1 Cycle 18 that would i
allow the use of the moveable incore detector system for measurement of the core i
peaking factors with less than 75% and greater than or equal to 50% of the detector l
thimbles available.
Attached is a summary of the results of the Prairie Island Unit 1 Cycle 18 low power physics testing, and a revision to Attachment 1 to Exhibit A of the July 15,1996 License Amendment Request, updated to include the results of Unit 1 Cycle 18 flux maps 11 1
)
and 12.
In ihio letter we have made no new Nuclear Regulatory Commission Commitments.
Please contact Gene Eckholt (612-388-1121) if you have any questions related to this License Amendment Request.
f)f,
'u l
1 Michael D Wadley
[COl Plant Manager Prairie Island Nuclear Generating Plant 9608280038 960822 PDR ADOCK 05000282 PDR
i USNRC NORTHERN STATES POWER COMPANY August 22,1996 Page 2 c: Regional Administrator-Ill, NRC NRR Project Manager, NRC Senior Resident inspector, NRC State of Minnesota Attn: Kris Sanda J E Silberg Attachments:
Affidavit Summary of the results of the Prairie Island Unit 1 Cycle 10 low power physics testing.
l Revision to Attachment 1 to Exhibit A of the July 15,1996 License Amendment Request.
i l
)
UNITED STATES NUCLEAR REGULATORY COMMISSION NORTHERN STATES POWER COMPANY PRAIRIE ISLAND NUCLEAR GENERATING PLANT DOCKET NO. 50-282 50-306 1
SUPPLEMENTAL INFORMATION IN SUPPORT OF A REQUEST FOR AMENDMENT TO OPERATING LICENSES DPR-42 & DPR-60 j
i 1
Northern States Power Company, a Minnesota corporation, with this letter is submitting additional information requested by the NRC Staff in support of the July 15,1996 License Amendment Request related to the reduction of moveable incore detector thimbles.
i This letter contains no restricted or other defense information.
NORTHERN STATES POWER COMPANY h
By ktc bOcw Michael D Wadley Plant Manager Prairie Island Nuclear Generating Plant On this((
of
/i3[3 before me a notary public in and for said County, personally apppd Micfiael D Wadley, Plant Manager, Prairie Island Nuclear j
Generating Plant, and being first duly sworn acknowledged that he is authorized to execute this document on behalf of Northern States Power Company, that he knows the j
contents thereof, and that to the best of his knowl dge, information, and belief the st ements made in it re tr
't is not int posed for delay.
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NOTARYPUBUGMINNESOTA MARCIA K. LeCORE 1;
HENNEPIN COUNTY h
My Cornm!aelon Expires Jan.31,2000 wswwww::::::::::::::::::::::::n
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l PRAIRIE ISLAND UNIT ONE CYCLE 18 LOW POWER PHYSICS TESTING l
Initial Criticality at 03:26 on 3-3-1996.
Measured Predicted Review Parameter Value Value Criteria Error t
I critical Boron Concentration, 1964 1943 i 50 ppm
+ 21 ppm l
ARO (ppm)
Critical Boron Concentration, 1821 1818 i 50 ppm
+ 3 ppm A bank in (ppm)
ITC ARO (pcm/*F)
+0.6
+1.0
> -3.6
- 0.4
< +5.0 Control Rod By Rod Swap control Bank At Reference Bank (pcm) 1063 1118 i 10%
-4.9%
Control Bank B (pcm) 617 603 i 15%
+2.3%
i Control Bank C (pcm) 912 913 i 15%
-0.1%
Control Bank D (pcm) 806 825 i 15%
-2.3%
l Shutdown Bank A (pcm) 662 668 i 15%
-0.9%
l Shutdown Bank B (pcm) 662 668 i 15%
-0.9%
Total of All Banks 4722 4795 i lot
-1.5%
l I
l l
I i
1 Att chm:nt 1 Exhibit A Prairie Island Summary of Flux Map Peaking Factors Flux Map Burnup FAH Margin FQ Margin Number (MWD /MTU)
% Power to Limit to Limit 1
5 30 15.4%
44.3 %
2 10 48 12.2 %
46.4 %
3 35 70 10.6%
34.7 %
J 4
155 100 3.8%
2.8%
5 225 100 4.4%
9.0%
6 235 100 3.5%
9.1%
7 1300 100 4.7%
5.0%
8 2425 100 4.1%
5.3%
9 3035 100 5.2%
7.8%
10 4168 100 5.3%
9.0%
11 5100 100 5.0%
9.5%
12 6142 100 5.1%
9.8%