ML20117M643
| ML20117M643 | |
| Person / Time | |
|---|---|
| Site: | Byron  |
| Issue date: | 09/11/1996 |
| From: | Wozniak D COMMONWEALTH EDISON CO. |
| To: | NRC (Affiliation Not Assigned), NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| BYRON-96-5145, NUDOCS 9609170587 | |
| Download: ML20117M643 (2) | |
Text
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- g Commonwealth Ediwn Company liyron Generating Station 4 450 North German Church Road
- 11) ron. IL 61010-9791 Tel H15-23 444 4 i September 11,1996 LTR:
BYRON-96-5145 FILE: 3.11.0530 Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Washington, DC 20555-0001 Attention: Document Control Desk
SUBJECT:
Steam Generator (SG) Tube Repairs Resulting from Byron 2 Forced (B2F17) and Refueling (B2R06) Outages Byron Nuclear Power Station Unit 2 Facility Operating License NPF-66 NRC Docket No. 50-455 This letter is to inform the staff of SG tubes plugged during the B2F17 and B2R06 inspections conducted between August and September 1996. This information is being reported pursuant to Technical Specification 4.4.5.5a.
All tubes in each SG were inspected from the hot leg tube end to the cold leg tube end for the bobbin eddy current inspection. The following additionalinspections were performed during this outage: 25% top of tubesheet (Hot Leg) Rotating Pancake Coil (RPC) 25% row 1 and row 2 U-Bend Plus Point, and 25% Preheater expansion region RPC in SG A. Based on the composite results of these inspections, it was determined that each steam generator would be classified as C-2 category pursuant to Technical Specification 4.4.5.2.
As a result of the above inspections, a total of 30 tubes will be plugged during these outages (B2F17 and B2R06). Four tubes were plugged as a result of the forced outage due to leakage in SG A (B2F17). Tube plug distribution between the steam generators is o
summarized in the following table.
58' 00 l0 8.o
Tubes Plugged This -
Tubes Plugged in Total Tubes Plugged g
~ Outage Previous Outages g
2A 11 (*)
31 42
)))
oo 2B 10 65 75 7
2C 6
27 33 y
2D 3
14 17 40 Totals 30 137 167 o u.0 n36
- 4 of the 11 tubes were plugged as a result of the forced outage (B2F17) during August.
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4 If there are any additional questions, please contact Marcia i.esniak, Nuclear Licensing Administrator at (630) 663-6484.
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'4 David B. Wozniak Site Engineering Manager Byron Nuclear Power Station f
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cc:
A. B. Beach, NRC Regional Administrator-Rill i
G. F. Dick, Jr. Byron Project Manager - NRR Sonia Burgess, Senior Resident inspector, Byron Office of Nuclear Safety-lDNS j
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