ML20206D691
| ML20206D691 | |
| Person / Time | |
|---|---|
| Site: | McGuire, Mcguire  |
| Issue date: | 11/10/1988 |
| From: | Tucker H DUKE POWER CO. |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| NUDOCS 8811170217 | |
| Download: ML20206D691 (3) | |
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DukeIbarr Company HuoTnr PO Bar 33198 s
Iice PresiJrrt Charlotte, N C 28242 bclear Production (i31)3 3 4511 DUKEPOWER Novestber 10, 1988 U.S. Nuclear Begulhtory Cortmissicn Washington, DC 20555 ATTENTICN: Docurrent Control Desk
Subject:
McG11re Nuclear Station Docket Ntabers 50-369 and -370 RID Bypass Resuoval By License Anendments 84 (Unit 1) and 65 (Unit 2), the NBC authorized Duke to renove the RID Bjpass manifolds at McGlire and rep 1. ace them with fast responso thermcwell mounted RIDS. 7his has been cmpleted for McGuire Unit 2.
The Safety Evaluatica Ibport scocopanying these License Anerrhnents stated "The Licensee will perform a caparison of the tanperature indications after the modification with measurements prior to the I:odifications.
The NRC will be notified of the results of this ccrparison including an explanation of my variaticns larger than expected".
This caparison las been empleted for McGuire thit 2.
7he results are shown in the attached table.
This cortparison was obtained using results frcm the Precision Peactor Coolant Flow Measurement Calculation Procedure. This procedure was performed near the beginning of cycles 3,4 and 5.
Ibr each of the fcur locps, averages of four measurments each of Ibt Icg and Cbid Icg tmperatures yielded an average delta-T. The average delta-T was then divided by an average secondary pcmer calorimetric value to normalize the results to 100%.
Although the change shcwn in the table in delta T frc:n cycle 4 to 5 was slightly greater than the chinge frca cycle 3 to 4, the magnitude of these variaticos is insignificant. There results indicate a randcm distribution in the variaticna of normalized delta T indications and show the rrodified reactor coolant taperature measurcsnent syntan is functioning as expected.
Very truly yours, I
bla 4dd s
/ gas Ital B. Tucker stG/142/rrmf i
1 0911170217 seitgo PDR ADOCK 05000349 P
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Document Cbntrol Desk November 10, 1988 Page 2
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t xc: Darl S. Hood, Project Manager Mr. M.L. Ernst Office of Nuclear Nactor Begulation Acting Ngional Achinistrator' U.S. Nuclear kgulatory Comission U.S. Nuclear kgulatory Com.
Washington, DC 20555 Region II 101 Marietta St., NW, Suite 2900 P.K. Van Doorn Atlanta, GA 30323 Senior Resident Inspector McQ2 ire Nuclear Station 1-4 l.
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McGilire Nticlear Station - Unit 2 Y,.
Effect of RID Bypass'14snoval on maatred Delta-T 1
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,.ri Icop Pre Mxl Pre Mxl Ibst bbd Delta T^
Delta T 9/04/86 8/27/87 08/11/88 Change Change Cycle 3 Cycle 4 Cycle 5 4-3 5-4 4
A 57.98 58.19 57.59 0.21
-0.60 B
56.97 56.99 57.50' O.02 0.51 C
59.40 59.26 60.21
-0.14 0.95 t
d 57.62 57.12 57.45
-0.50' O.33' m
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