ML20057D071
| ML20057D071 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 09/21/1993 |
| From: | Etemadi S ABB COMBUSTION ENGINEERING NUCLEAR FUEL (FORMERLY, ASEA BROWN BOVERI, INC. |
| To: | |
| Shared Package | |
| ML20046D604 | List: |
| References | |
| A-93-026, A-93-26, NUDOCS 9310010063 | |
| Download: ML20057D071 (5) | |
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' to A-93-026 Page 1 of 5 ANO-2 CYCLE 10 COLSS and CPCS Addressable Constants for Reduction of Operable Incore Detectors i
PREPARED BY:
&% N1.' 9Itil93 l
Signature / Date S. Etemadi Author VERIFICATION STATUS The information contained in this document has been verified in accordance with the ABB Combustion Engineering Nuclear Fuel ouality Assurance Program.
/ Yes No A EDID ABB Combustion Engineering Nuclear Fuel pggggy 9310010063 930924 P
PDR ADOCK 05000368 p PDR i;M
ij ) i j to i A-93-026 l Page 2 of 5 i J I As proposed by CE (Reference 1) and approved by Entergy/ANO, an analysis was performed to determine the impact of a reduction in the number of operable-incore detectors on the ANO-2 Cycle 10 COLSS and CPCS addressable constants transmitted in References 2 and 3. Reference 2 transmitted the original Cycle i 10 00LSS and CPCS addressable constants and Reference 3 provided the revised j BERR1 and BERR3 constants for reduced inlet temperature. i The analysis considered Technical Specification incore detector failure limits i j of up to 50% along with a bounding 1% increase in the CECOR Fxy measurement uncertainty which is consistent with the analysis performed at Entergy i (Reference 4). The only addressable constants affected by this analysis are l j the COLSS EPOL2/4 and UNCERT constants and the CPCS BERR1 and BERR3 constants. All of the other addressable constants transmitted in Reference 2 remain unchanged. l The values of revised COLSS and CPCS addressable constants are given in Tables [ j 1 and 2, respectively. As stated in Reference 1, the COLSS database constant K09 must be modified to j incorporate the revised minimum number of operable incore detectors. It e i value of K09 for the 50% failure limit is 110. 1 J The COLSS addressable constants listed in Table 1 are appropriate for use with l the COLSS algorithms and database constants described in ANO-2 COLSS Functional Design Requirements (References S and 6) and the COLSS Database 1 Document for ANO-2 Cycle 10 (Reference 7), provided the appropriate value of K09 is incorporated. The CPCS addressable constants listed in Table 2 are consistent with the Functional Design Requirements described in References 8 and 9, and the database constants listed in Reference 10. 1 i Please note that all the assumptions, requirements, and guidelines specified in References 2 and 3 remain effective. I J J Y l ,n. ,e -rw- ~- a m-w e
- to l
A-93-026 l Page 3 of 5 { l i l 1 Table 1 ANO-2 Cycle 10 Current and Revised COLSS Addressable Constants j for a Reduced Number of Operable incore Detectors i Constant Description Value Current" 1 50 % i Failed j i UNCERT Uncertainty Factor for 1.09 1.11 LHR POL f EPOL2/4 Uncertainty Factor for 0.11 0.12 DNBR POL f
- Values come from Page A2-2 of Reference 2.
i I Table 2 ANO-2 Cycle 10 Current and Revised CPC Addressable Constants for a Reduced Number of Operable incore Detectors t Constant Description Value ( Current
- 150%
FaHed P l 6 BERR1 Power Uncertainty Factor Used in 1.21 1.22 } DNBR Calculation i BERR3 Power Uncertainty Factor Used in Local 1.25 1.26 i Power Density Calculation 1
- Values come from Page 2 of Reference 3.
I
. to ~ A-93-02G Page 4 of 5 iferences: 1. D. R. Earles to F T. Philpott, " Proposal to Support Reduction of Operable Incore Detectors for ANO-2 Cycle 10 and Beyond," A-93-025, September 8, 1993. 2. D. R. Earles to F. T. Philpott, "ANO-2 Cycle 10 Final CPC/CEAC, COLSS and CEFAST Information," A-92-050, October 8, 1992. 3. D. R. Earles to F. T. Philpott, "ANO-2 Cycle 10 Revised BERR1 and BERR3 Values in CPC and Revised Planar Radial Peaks in CPC and COLSS," A-92-065, December 23, 1992. 4. R. B. Lang, "ANO-2 Cycle 10 CECOR Reliability Factors," 041-01;QR-220-18, CE0-93/00367, September 17, 1993. 5. " Functional Design Requirements for a Core Operating Limit Supervisory System (COLSS), "CE-NPSD-344-P, Revision 01-P, December 1986. 6. " Arkansas Nuclear ONE Unit 2 COLSS Functional Design Specification - Plant Specific Supplement," CE-NPSD-352-P, Rev. 00-P, July 1986. 7. "ANO-2 COLSS Database Document," CE-NPSD-315, Rev. 05-P, October 1992. 8. " Functional Design Requirements for a Core Protection Calculator," CE-NPSD-335-P, Rev. 02-P, April 1988. 9. " Functional Design Requirements for a Control Element Assembly Calculator," CE-NPSD-336-P, Rev. 01-P, April 1988. 10. "AN0-2 CIP CPC and CEAC Database Listing," CE-NPSD-351-P, Revision 01-P, April 1988.
^ \\ . to A-93-026 Page 5 of 5 f Software Media Transfer Form ACCL NO. 127 CORE PROTECTION CALCULATOR SYSTEM ADDRESSABLE CONSTANTS AND 53FTWARE MEDIA TRANSFER FORM A. Originator S. Etemaai Plant ANO-2 Cycle 10 Date September 21. 1993 i I B. Package Contents (C-E Windsor): Revised BERR1 and BERR3 values for reduction of operable incore detectors I l C. Receipt of Change (NSSS Site): 1. Receipt of CPC Addressable Constants / Software media is acknowledged. Name Date 2. The change has been reviewed and found acceptable, except as noted: 3. Please return to: Mr. M. A. Book CEP: 5318-GC28 1000 Prospect Hill Road Post Office Box 500 Windsor, CT 06095-0500 D. Acknowledgement of Receipt of Change (C-E Windsor): 1. ACCL Entries Completed Date NOTE: Originator to send copies of completed forms to all concerned C-E Engineering groups. _}}