ML20210P312
| ML20210P312 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 08/20/1997 |
| From: | ENTERGY OPERATIONS, INC. |
| To: | |
| Shared Package | |
| ML20210P308 | List: |
| References | |
| 96-R-2015-02, 96-R-2015-02-R02, 96-R-2015-2, 96-R-2015-2-R2, NUDOCS 9708270055 | |
| Download: ML20210P312 (5) | |
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9 ENTERGY OPERATIONS ARKANSAS NUCLEAR ONE - UNIT 2 l
CORE OPERATING LIMITS REPORT FOR CYCLE 13 l
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ARKANSAS NUCLEAR ONE - UNIT 2 CORE OPERATING LIMITS REPORT FOR CYCLE 13 I.
INTRODUCTION This CORE OPERATING LIMITS REPORT (COLR) has been prepared in accordance with the requirements of Arkansas Nuclear One - Unit 2 (ANO-2) Technical Specification 6.9.5 for ANO 2's Cycle 13. The core operating limits have been developed using the NRC approved l methodologies specified in Section V. This is Revision 2 of the Cycle 13 COLR.
IL
SUMMARY
OF CHANGES
[
l. Listed below are the changes to the COLR from the Cycle 13 COLR, Revision 0.
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Revision 1 e
The Linear Heat Rate with COLSS out of service limit has been revised from s 13.5 kw/
s 13.3 kw/ft. This change is made to address an error found in the energy redistribution factors.
Thew factors are used in the LOCA analyses.
Revision 2 The Reference 8 title was corrected to be consistent with the standard title used by ABB-CE.
References 9 and 10 were renumbered to 10 and 11, respectively, to allow for the new small break LOCA reference to be added. A new Reference 9 was added consistent with added to ANO-2 Technical Specification 6.9.5. - This reference is to Supplement 1-P to CENPD-137.
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. 3/4.2.1 - LINEAR HEAT RATE
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l-With COLSS out of service, te linear heat rate shall be mairdained s 13.3 kw/ft.
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L2.3 - AZIMUTHAL POWER _ TILT-T2 The measured AZIMUTHAL POWER TILT shall be maintairied s 0.03, 8) 3/4.2.4 - DNBR MAROIN The DNBR limit shall be maintained by one of the following methods:
a)
- With COLSS in service and neither CEAC operable - Maintain COLSS calculated core power less than or equal to COLSS calculated core power operating limit based on DNBR decreased by 13%.
- b)
With COLSS out of service and at least one CEAC operable - Operate within the -
L Region of Acceptable Operation shown or. Figure 5, using any operable CPC
- channel, c)
With COLSS out of service and neither CEAC operable - Operate within the Region of Acceptable Operation shown on Figure 6, using any operable CPC channel.
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- 3.2.7 - AXIAL SHAPE INDEX The core average AXIAL SHAPE INDEX (ASI) shall be maintained within the following limits:
a) _
-COLSS IN SERVICE.
- 0.27 s ASI s + 0.27 b)
- 0.20 s ASI s + 0.20 1
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METHODOLOGIES The analytical methods used to determine the core operating limits listed above are those previously reviewed and approved by the NRC in:
1)
"The ROCS and DIT Computer Codes for Nuclear Design," CENPD-266-P-A, April 1983. Methodology for the limit on Shutdown Margins, MTC, DNBR Margin and the CEA Insertion Limits.
2)
"CE Method for Control Element Assembly Ejection Analysis," CENPD-0190-A, January 1976. Methodology for the CEA Insertion Limits and Azimuthal Power Tilt.
3)
" Modified Statistical Combination of Uncertainties," CEN-356(V) P-A, Revision 01-P-A, May 1988. Methodology for the limits on the DNBR Margin and the ASI.
4)
" Calculative Methods for the CE Large Break LOCA Evaluation Model," CENPD-132-P, August 1974. Methodology for the limits on the Linear Heat Rate and Azimuthal Power Tilt.
5)
"Calcuhtional Methods for the CE Large Break LOCA Evaluation Model,"
CENPD-132-P, Supplement 1, February 1975. Methodology for the limits on the MTC, i
Linear Heat Rate, Azimuthal Power Tilt and ASL 6)
" Calculational Methods for the CE Large Break LOCA Evaluation Model,"
CENPD-132-P, Supplement 2-P, July 1975. Methodology for the limits on the MTC, Linear Heat Rate, Azimuthal Power Tilt and ASL 7)
" Calculative Methods for the CE Large Break LOCA Evaluation Model for the Analysis of CE and }y Designed NSSS," CEN-132, Supplement 3-P-A, June 1985. Methodology for Specification 3.1.1.4 for MTC,3.2.1 for Linear Heat Rate,3.2.3 for Azimuthal Power
{
Tilt, and 3.2.7 for ASL l8)
" Calculative Methods for the CE Small Break LOCA Evaluation Model,"
CENPD-137-P, August 1974. Methodology for the limits on the MTC, Linear Heat Rate, Azimuthal Power T;lt and ASL 9)
" Calculative Methods for the CE Small Break LOCA Evaluation Model," CENPD-137, Supplement 1-P, January 1977. Methodology for the limits on the MTC, Linear Heat Rate, Azimuthal Power Tilt, and ASL l10)
"CESEC - Digital Simulation of a Combustion Engineering Nuclear Steam Supply Sygem," December 1981. Methodoiogy for the limits on the Snutdown Margins, MTC, CEA Position, CEA Insertion Limits, and DNBR Margin.
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j ',11).. Technical Manual for the CENTS Code," CENPD 282-P. A, February 1991 Methodo for the limits on the Shutdown Margins, MTC, CEA Position, CEA Insertion Limits, and DNBR Margin.
VL LIST OF FIGURES Figure 1.
Moderator Temperature Coefficient Figure 2.
Required Power Reduction After CEA Deviation Figure 3.
CEA Insertion Limits Versus Thermal Power Figure 4.
Intentionady Deleted Figure 5.
DNBR Margin Operating Limit Based on Core Protection Calculators (COLSS Out of Service, CEAC Operable)
Figure 6.
DNBR Margin Operating Limit Based on Core Protection Calculators (COLSS Out of Service, Both CEACs Inoperable) l
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