ML20059M418
| ML20059M418 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 09/21/1990 |
| From: | Tucker H DUKE POWER CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9010040161 | |
| Download: ML20059M418 (3) | |
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DukeIbuer Company llu P r w a
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' PO Bat.13198 l'he President e
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Nuclear 1% duction (704).173 4511 DUKEPOWER September 21, 1990 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D. C.
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Subject:
Catawba Nuclear Station Docket No. 50-414 Special Report Gentlement Pursuant to Technical Specifications 6.9.2 and 3.1.1.3.a(3), please find I
attached a Special Report concerning the MTC Measurement and Temporary Rod Withdrawal Limit Determination performed during Zero Power Physics Testing for Catawba Nuc1 car Station, Unit 2. Cycle 4.
Very truly yours.
A y
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llal B. Tucker 1
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~ Attachment xc:
Mr. S. D. Ebneter Regional Administrator, R11 U. S. Nuclear Regulatory Commission 101 Marietta St., NW., Suite 2900 Atlanta, Georgia 30323 Dr. K. N. Jabbour Office of Nuc1 car Regulation U.S. Nuclear Regulatory Commission 4-One White Flint North, Mail Code 9113 r
Washington, D.C.
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Mr. W. T. Orders NRC Resident Inspector r
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Catawba Nuclear Station
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9010040161 900921 PDR ADOCK 0500C414 S
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DUKE POWER COMPANY CATAWBA NUCLEAR STATION l
SPECIAL REPORT Pursuant to Tech Spec 3.1.1.3.a(3) and 6.9.2 a Special Report is required to be submitted to the NRC reporting the results (within 10 days) of the MTC measurement and Temporary Rod Withdrawal Limit Determination performed during Zero Power Physics Testing at the Beginning of each cycle. This document details the result of the testing done i
for Catawba Unit 2 Cycle 4 on September 13, 1990.
The measured ARO MTC was determined to be +5.11 (HZP at a Boron concentration of 1670 ppmB). Based on this HZP MTC Temporary Rod Withdrawal Limits.were determined to be needed at 0% F.P. and between 85% and 100% F.P.
(at all other power levels the MTC was within Tech Spec requirement at all rod positions).
The Rod Withdrawal Limits for 0% (to maintain MTC within Tech Spec limits) are as follows:
Rgron Concentration Control Bank D Limit 1669 182 1664 202 1660 225 The Rod Withdrawal Limits for 85% (to maintain MTC within Tech Spec limits) are as follows:
Boron Concentration Control Bank D Limit 1671 182 1666 202 1662 225 The Rod Withdrawal Limits for 90% (to maintain MTC within Tech Spec limits) are as follows:
Boron Concentration Control Bank D Limit 1609 122 1603 142 1597 162 1591 182 1586 202 1582 225
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The Rod Withdrawal Limits for 95% (to maintain MTC within Tech Spec limits) are as follows:
Boron Concentratiom Control Bank D Limit 1529 142 1523 162 l
1517 182 1512 202 1508 225 The Rod Withdrawal Limits for 100% (to maintain MTC within
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Tech Spec limits) are as follows:
Boron Concentration pontrol Bank D Limit i
1453 162 l
1447 182 1442 202 1438 225 The most limiting Boron concentration is 1438 ppmB. From the Design Data for Catawba 2 Cycle 4 the predicted HFP,ARO Critical Boron Concentration is predicted to be as follows:
0 EFPD 1566 ppmB 4 EFPD 1243 ppmB Based on this information we are imposing the above Temporary Rod Withdrawal Limits until cycle Burnup is greater than 4 EFPD OR the HFP boron concentration is less than 1438 ppmB.
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