View source for B10835, Interim Significant Deficiency Rept SD-34 Re Interference & Possible Binding of Itt Grinnell Mechanical Snubbers. Initially Reported on 830304.Extension for Submittal of Final Rept Until 830801 Requested

{{Adams
| number = ML20072N189
| issue date = 07/07/1983
| title = Interim Significant Deficiency Rept SD-34 Re Interference & Possible Binding of Itt Grinnell Mechanical Snubbers. Initially Reported on 830304.Extension for Submittal of Final Rept Until 830801 Requested
| author name = Counsil W, Sears C
| author affiliation = NORTHEAST NUCLEAR ENERGY CO., NORTHEAST UTILITIES
| addressee name = Murley T
| addressee affiliation = NRC OFFICE OF INSPECTION &amp; ENFORCEMENT (IE REGION I)
| docket = 05000423
| license number = 
| contact person = 
| document report number = 10CFR-050.55E, 10CFR-50.55E, B10835, SD-34, NUDOCS 8307150240
| document type = DEFICIENCY REPORTS (PER 10CFR50.55E &amp; PART 21), TEXT-SAFETY REPORT
| page count = 1
}}

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* Seldon Street. Berlin. Connecticut N UTILITIES   co c,cd "' "* *''"" **
P.O. BOX 270 C Z,"*'j "~                                                       H ARTFORD. CONNECTICUT 06141-0270 wo , ,u,o         .,a w .                                         (203) 666-6911 L '    J     o,-...--
July 7,1983 Docket No. 50-423 B10835 Dr. Thomas E. Murley, Regional Administrator Region i U. S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, PA 19406

==Dear Dr. Murley:==

Millstone Nuclear Power Station, Unit No. 3 Reporting of Potential Significant Deficiencies in Design and Construction: Interference and Possible Binding of ITT Grinnell Mechanical Snubbers (SD-34)
On March 4,1983, Northeast Nuclear Energy Company (NNECO) reported a potential significant deficiency in the construction of Millstone Unit No. 3 as required by Title 10, Code of Federal Regulation Part 50, Paragraph 55(e). The potential significant deficiency involves ITT Grinnell snubber hardware interference which may limit the angle of action of the snubbers. The interference restricts snubber movement with the possibility of binding which could cause excessive piping loads. It is presently believed that the deficiency exists in ITT Grinnell snubber hardware manufactured prior to April 1980.
In our {{letter dated|date=April 8, 1983|text=April 8,1983 letter}} to Mr. James M. Allan, we stated that we would provide a final report to you describing the corre.;tive and preventive measures to be taken for this potential significant deficiency by July 1,1983. Based on a June 30,1983 telephone conversation between your Mr. T. Elsasser and our Mrs.
P. C. Bandzes, we have requested an extension of this date mtil August 1,1983.
Very truly yours, NORTHEAST NUCLEAR ENERGY COMPANY W . b . Ocv W. G. Counsil Senior Vice President Q
By: C. F. Sears Vice President Nuclear and Environmental Engineering 8307150240 830707 PDR ADOCK 05000423 S                     PDR                                                                                           Ig3}}