ML20031F196
| ML20031F196 | |
| Person / Time | |
|---|---|
| Site: | Indian Point  |
| Issue date: | 05/16/1979 |
| From: | Weeks J BROOKHAVEN NATIONAL LABORATORY |
| To: | Almeter F Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML13319A640 | List:
|
| References | |
| FOIA-81-313 NUDOCS 8110190338 | |
| Download: ML20031F196 (2) | |
Text
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BROOKHAVEN NATIONAL LABORATORY
,r m MEMORANDUM DATE: May 16, 1979 To:
Prank M. Almeter FROM:
John R. Wee g
SUBJECT:
Review of PASNY
'ittal of April 20, 1979 In general, I think the response of PASNY is satisfactory. Their anrlysis of the cause of denting at Indian Point 3 is consist nt with my understanding of the causes, and they have proposed increased surveillance for and improved response to condenser tube leaks, and the Westinghouse boric acid program, which are acceptable, in my opinion.
l T think, however, it is unfortunate that the PWR operators with
. minor denting problems are not avidly pursuing chemical cleaning at this stage; whereas, PASNY says chemical cleaning is under long-term evaluation, I think it should be given a high priority.
Dan van Rooyen and I both feel strongly that che'mical cleaning
~
would be most beneficial to those units in which denting is only slight. By the time denting becomes moderate and support plate damage has occurred, it is already too late for chemical cleaning, as was learned at Indian Point 2.
JRW/rb cc W. Y. Kato V. S. Noccan W. S. Hazelton B. D. Liaw /
- 3. van Rooyen 1
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MEMORANDUM tM
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DATE:
06/02/78
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To:
Files f
FROM:
J. R. We ks
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SUBJECT:
Trojan Steam unerator Inspection Spring, 1978 Cn May 3, 1978, I met with Carl Shaw in the Portlar.d General Electric offices in Portland, Oregon to discuss tse results of the recent steam generator inspec-tion. This inspection was the second since the base line and the results were ctill in the raw data stage at that time.
The first inspecti'on, in 1977, looked at the A and C steam generators, which were considered the best and the worst from a chemist.ry point of view at that time. Nothing reportable was fovnd. There were some permeability variations.
Visual inspection of the tubes showed them to look. clean. No sludge was found on the tube sheet on steam generator A, and less than la in steam generator C.
During the second year of operation a small (1 gallon per day) steam generator leak developed in steam generator B.
This leaking tube was very difficult to iden-tify during shutdown since no leakage occurred ~at ail 7tithout pressurir.ation. 'fhe (.;
feak was found tote on one of"the tight radius U-bend tubes on th'e cold leg side.
PGTE 'surmized it is in the' Eube sheet area although the eddy current inspection could not identify the source. The tubes at Trojan were expanded part way into the tube sheet in the factory and then further expanded to the full depth of the tube sheet at the Trojan site before startup.
Eddy current inspection of steam generator B identifial two small dents each less than 1/2 mil in the #1 support plate region (row 1, column 32 and row 24, column 14).
These dents were not there during the baseline inspection. Sludge lancing was performed in all four steam generators at Trojan. Photographs of the tubes taken through the hand holes showed a significant increase on the amount of scale on the secondary side.
l Distribution:
F.M. Almeter -
W.S. Hazelton C.M. Trammell #p M K.
Herrinq_
l N.F. Conrad D.
van Rooyen W.Y. Kato' O
JRW/bMc
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