ML20003B448
| ML20003B448 | |
| Person / Time | |
|---|---|
| Site: | LaSalle  |
| Issue date: | 02/09/1981 |
| From: | Delgeorge L COMMONWEALTH EDISON CO. |
| To: | Youngblood B Office of Nuclear Reactor Regulation |
| References | |
| LOD-81-40-11, NUDOCS 8102120085 | |
| Download: ML20003B448 (2) | |
Text
Commonwealth Edison One First Nat. oral PiaZ8. Ch'Cago. ffhncis Address Reply to: Post Off:ce Box 767 Chicago, minois 60690 February 9, 1981 Mr. B.J. Youngblood, Chief Licensing Branch 1 Division of Licensing U.S. Nuclear Regulatory Commission Washington, D.C.
20555
Subject:
LaSalle County Station Units 1 & 2, Fuel Element-Water Side Corrosion, NRC Docket Nos 50-373/374 LOD 81-40-11
Dear Mr. Youngb!ood:
The issue of fuel element water-side corrosion has been reviewed by the NRC and General Electric Company generically. As indicated in a generic meeting in December, 1979, the failures identified on one operating BWR facility appear to have been associated with a metallic incursion in the feedwater. A review of the issue was also conducted by the BWR Licensing Review Group and a group position submitted to the NRC Staff in December, 1981 which discusses the resolution bases for each BWR NTOL facility, it was concluded in that LRG working paper, based on the studies conducted by GE and observations made on operating BWR facilities, that plants with non-copper bearing main condensor tubes are not expected to experience the clad perforations resulting from the subject water side corrosion.
The LaSalle County units do not have copper bearing condensors and, therefore, are not expected to experience the problem.
it is judged that this discussion will resolve any questions your staff may have had related to the adequacy of the LaSalle County Fuel element design. A copy of the LRG Position Paper on water-side corrosion is attached for your information.
If there are any further questions in this regard, please direct them to this office.
Very truly yours,
/
L.O. DelGeorge Nuclear Licensing Administrator Attachment
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LRG tl0RXIrlG PAPER
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. CPB-4 llater Side Corrosion l
The applicant has not addressed the potential for fuel corrosio
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Position Unique
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As. indicated in the General Electric presentation given to the flRC in December 1979, the failures appeared to be associated with a retallic incursion in the feedwater. This event has occurred only once in the BWR operating history and is unlikely to occur.
1.
Plants with non-copper bearing main condensor tubes are not expected to experience the clad perfaratiens of this concern. La Salle, Shoreham j
.. and Susquehanna do not have copper bearing condensors.
- s 2.
Plants with adequately designed filters demineralizers are not expected to experience the clad perforations of this concern even with copper bearing condensor. tubes.
Zimner, Fermi 2 and.)tanford 2 are designed accordingly.
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