ML18043A648
| ML18043A648 | |
| Person / Time | |
|---|---|
| Site: | Palisades  |
| Issue date: | 04/19/1979 |
| From: | Ziemann D Office of Nuclear Reactor Regulation |
| To: | Bixel D CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| References | |
| NUDOCS 7905080158 | |
| Download: ML18043A648 (3) | |
Text
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- Oo~ket No. 50-255 Mr. David Bixel Nucfear Licensing Administrator Consumers ~ower Company 212 West -Michigan Avenue*
- Jackso~, Michigan 49201
Dear Mr. Bixel:
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APR -1 ~ 1979 We are co.ntfnuing. our revie11i of the Palisades steam generator replace-
. rnent program submitted by your letter of January 3-; 1979, and have several questions, enclosed, related to the design of the replacement *
- steam generators.* To maintain our review schedule we request your
- 1 reply within 60 days.of the date of this lefter.
Addition~l questions, related to thi~ or other sections of the report,:- may develop as the review proc~eds and we will transmit such,partial set of questions *when they arise.
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. Enc 1 osure:
sini::ere)y,
' Origtrial Stgn~d by:;
Dennis ~. Ziemann Dennis l. Ziemann, Chi,ef Operating Reactors Branch #2
- Pivision of Operating Reactors DISTRIBU.TION*:
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Mr. Da*.'id Bixel cc M. I. Miller, Esquire Isham, Lincoln & Beale Suite 4200 One First National Plaza Chicago, Illinois 60670 Mr. Paul A. Perry, Secretary Consumers Power Company 212 West Michigan Avenue Jackson, Michigan 49201 Judd L. Bacon, ~squire Consumers ?m*:er Company 212 West Michigan Avenue Jackson, Michigan 49201 Myron r*'.. Cherry, Esquire Suite 4301 One IBM Plaza Chicago, Illinois 60611 Kalamazoo Public Library 315 South Rose Street Kalamazoo, Michigan 49006 KM C Inc.
ATIN:
Mr. Jack McEwen 1747 Pennsylvania Avenue, N. W.
Suite l 050 Washin~ton, D. C.
20006
.. ' April 19, 1979
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A.
- Q PALISADES REVIEW OF STEAM GENERATOR REPAIR REPORT REQUEST FOR ADDITIONAL INFORMATION
- l. The original Palisades steam generators appear to be unusually prone to promoting hideout of impurities from the coolant. This may be a result of the extremely dense forest of tubes and relatively small tube-to-tube spacing. Therefore, indicate:
(a) The number and spacing of tubes in the replacement generators and how they compare with the existing generators, (b) Details of design changes made to improve the flow charac-teristics to eliminate or reduce the potential for sludge accumulation, and (c)
What water chemistry controls you plan to use to minimize degradation of the replacement generators.
- 2.
The eggcrate tube supports in the replacement steam generators will be fabricated of Type 409 stainless steel. Since Type 409 is only marginally a stainless steel, provide documentation of technical data showing its behavior under off normal water chemistry conditions.
- 3.
Indicate what materials will be used for the batwing strips in the replacement generators.
- 4.
Discuss what effects the thinner tube walls will have on the existing plugging criteria.
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