ML20249C659
| ML20249C659 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom, Limerick  |
| Issue date: | 06/15/1998 |
| From: | Geoffrey Edwards PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9806300542 | |
| Download: ML20249C659 (2) | |
Text
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Station fupport Deptrtment a
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PECO NUCLEAR ncoee c -e, 96$ Chesterbrook Boulevard A Unit of PECO Energy Wayne, PA 19087-5691 June 15,1998 Docket Nos. 50-277 50-278 50-352 50-353 License Nos. DPR-44 DPR-56 NPF-39 NPF-85 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555-0001 i
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Subject:
Status of PECO Energy Units with Respect to Channel Bow issu-a
Dear Sir / Madam:
A conference call was held on May 28,1998 with the NRC. This callincluded representatives from the BWROG along with New York Power Authority, General Electric and PECO Energy. During this conference call the NRC requested an update to information that was previously provided to the NRC from GE. The information included GE estimates of the number of affected channels at each plant and an estimate of the bundle average exposure. The information provided below is fg an update for PECO Energy plants.
1 2
3 4
5 6
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Date of Total # of Initial # of
- of EOC # of Plant / Unit Cycle Bundles / Cells Bundles / Cells Bundles / Cells Bundles / Cells T st PBAPS 2 Cycle 12 208/104 18/13 5/16/98 24/16 56/48 PBAPS 3 Cycle 12 138/92 0/0 11/22/98 18/16 119/80 1
LGS 2 Cycle 5 48/25 8/8 9/25/98 28/17 48/25 LGS 1 Cycle 8 9906300542 h 615 7
PDR ADOCK 05000277; P
PDR u.
Juna 15,1998 Page 2 l
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Table data explanations:
- no suspect channels
- the next scram time test will be on 7/25/98. No bundles will have exposures greater than 45,000 mwd /MT at that time. The first bundle will exceed 45,000 mwd /MT on or about 9/3/98.
Column 2: number of fuel bundles and cells (a cell contains one control rod surrounded by four fuel bundles) that have channels which did receive cold working during manufacture.
Column 3: number of fuel bundles and cells, from the population in column 2, that had bundle average exposures greater than the testing minimum of 45,000 mwd /MT at the time this issue was discovered.
Column 4: approximate date of first follow-up scram time testing since the time the issue was discovered.
Column 5: estimate of the number of fuel bundles and cells, from the population in co;umn 2, that will have bundle average exposures greater than the testing minimum of 45,000 mwd /MT at the time of column 4 testing.
Column 6: estimate of the number of fuel bundles and cells, from the population in column 2, that wili have bundle average exposures greater than the testing minimum of 45,000 mwd /MT at end-of-cycle.
We would also sike to inform the NRC that PECO Energy plans to use the BWROG's Channel Bow Monitoring Plan once it is finalized. We currently have a monitoring plan in place that was used as the basis for the BWROG's plan.
Please contact us if you have any questions on this material or require additional information.
Sincerely yours, Garrett D. Edwards Director-Licensing cc:
H. J. Miller, Administrator, Region 1. USNRC A. L. Burritt, USNRC Senior Resident inspector, LGS A. C. McMurtray, USNRC Senior Resident inspector, PBAPS
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