ML20126B337
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UNITE] STATES NUCLEAR REGULATORY COMMISSION
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WASHINGTON, D. C. 20555 v
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March 30, 1984 e
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R. Conte, Senior Resident Inspector, TMI-1 3/
FROM:
F. Young, Resident Inspector, TMI-1
SUBJECT:
Once Through Steam Generator Sulfur Corrosion and Eddy Current Testing This is in response to your inquiry on the status of Once Through Steam Generator (OTSG)EddyCurrentTesting(ECT)inserviceinspectionatTMI-1and dissemination of OTSG Sulfur Corrosion information as addressed in the sta enclosures.
InregardtotheSteamGeneratorECTinserviceinspection(ISI),thesubject was discussed in enclosure 1. The subject was also addressed for TMI-1 in the Based on this SER, the staff's Safety Evaluation Report (SER) NUREG 1019.
staff concluded that a specific extended post-repair eddy current inservice inspection plan would be required. The scope of the ECT would include inspection of the full length of the tube.
Even though the referenced memorandum to NRR did not generate the TS change that was desired, requirements to be imposed on TMI-1 (from NUREG 1019) will address the I assume that the referenced memorandum that was fomarded to the concern.
NRR will be properly addressed generically.
With respect to the NRC dissemination to the industry of OTSG Sulfur Corrosion information, the subject was briefly addressed in IE Information Notice 82-14, (Enclosure 2). The IE infonnation notice is somewhat outdated.
In addition, the problem was discussed in a AEOD Engineering Evaluation Report Number The AEOD engineering evaluation addressed sulfur AE0D/E313(Enclosure 3).
induced stress corrosion cracking (SCC) of fuel assembly nozzles stored in the This Prairee Island spent fuel pool and briefly mentioned the TMI-1 case.
engineering evaluation appears to indicate that sulfur SCC may be symptomatic Apparently due to the unavailability of of a potential generic issue.infonnation at that time, the AE0D evaluation co The unique aspects of sulfur induced SCC that were noted in the THI proble most important of these aspects appear to be: treatment, resulting temperature of the environment and (5) type or species of sulfur that causesO SCC and how that species is fonned in the plant.The unique aspects about this ty sulfur induced SCC is more complete.
corrosion as described in NUREG 1019 in conjunction with later AE00 evaluations, if any, should be highlighted to other licensees.
8506140073 850125
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2 R. Conte Based on the above, it appears that NRC staff should update the industry (probably by IE Information Notice) on these and any other similar events known to date.
I will be glad to respond to any comments you may have.
O 9-F. Y
,R dent Inspector I-l cc:
A. Fasano E. Conner R. Keimig R. Starostecki
Enclosures:
(1) Memorandum from E. Jordan, Director, Division of Engineering and Quality Assurance, IE to D. Eisenhut, Director, Division of Licensing, NRR, dated July 19,1982.
(2)
IE Notice 82-14, dated May 12,1982.
(3) AE00 Engineering Evaluation Report Number AE0D/E313, dated June 15, 1983 9
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