ML20050A008
| ML20050A008 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 03/18/1982 |
| From: | Mroczka E NORTHEAST NUCLEAR ENERGY CO. |
| To: | Haynes R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| MP-2-5096, NUDOCS 8203290537 | |
| Download: ML20050A008 (1) | |
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q March 18, 1982 MP-2-5096 a
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Mr. Ronald C. Haynes Regional Administrator, Relion I f
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Office.of Inspection and, Enforcement E
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'U'.S. Nuclear Regulatory Commission a
631 Park Avenue '
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. King,of. Prussia, Pennsylvania 19406 m-margau be Referencef Facility Operating License No. DPR-65.
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Dock'et No.' 50-336-w
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De'ar Mr. Haynes:
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e This letier is submitted pursuant to Millstone Unit 2 Appendix A
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Te'chnicai Specification Section 4.4.5.1.5.A, Report of Steam Generator Tube Pl.ugging.
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'Ni' min accordance ewith Technical Specification Section 4.4.5.T.4, all-steam
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generator stubes with degradation'in excess of the plugging limit were u
. remobed,froni service by plygging.
Four tubes in Steam Generator No.1
'were removed from seFvice because:they were cut to allow removal of tube samples for investigation of the cause of degradation.
Four tubes would no pass a 0.540 inch diameter e y current probe'. A total of 425 tube (were plugged in., Steam Genera @ tor No. I and 284 tubes in Steam s
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-Generator No72:
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The degradation which,r'sulted in tube plugging is chgracterized by
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localizqdareasofsmQ1pitsonthetubeoutsidediameter.
Investigation of the causes of this corrosion is continuing. A final report of the
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results of this investigation.and the, corrective actions proceeding from it will be provid'i.
Yours truly, NOR HEAST NUCLEAR ENERGY COMPANY IJ.Mroczka'l
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Station Superintendent Millstone Nuclear Power Station D
EJM/JJK:mo cc: Director, Office of Inspection and Enforcement Washington, D.C.
0203290537 020310 f6gp PDH ADOCK 03000336 0
PDH
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