ML20065P761
| ML20065P761 | |
| Person / Time | |
|---|---|
| Site: | Seabrook  |
| Issue date: | 10/18/1982 |
| From: | Devincentis J PUBLIC SERVICE CO. OF NEW HAMPSHIRE, YANKEE ATOMIC ELECTRIC CO. |
| To: | Starostecki R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, SBN-343, NUDOCS 8210260330 | |
| Download: ML20065P761 (2) | |
Text
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M8m SWON IPUEBLIC SERVICE Engin ine om=
Companyof New Hampshire 1671 Worcester Road Fromingham, Massachusetts 01701 (6!7). 872 8100 Octobe r 18, 1982 SBN - 343 T.F. Q2.2.2 United States Nuclear Regulatory Commission Region 1 631 Park Avenue King of Prussia, PA 19406 Attention:
Mr. Richard W. Starostecki, Director Division of Resident and Project Inspection Ref e re nces :
(a) Construction Permits CPPR-135 and CPPR-136, Docket Nos. 50-443 and 50-444 (b) Telecon of August 5, 1982, H. E. Wingate (YAEC) to Eugene Kelly (NRC Region I)
(c) PSNH letter, dated September 2,1982, " Interim 10CFR50.55(e) Report; Sheared Pinion Keys", J. DeVincentis to R. W. Starostecki
Subject:
Interim 10CFR50.55(e) Report; Sheared Pinion Keys
Dear Sir:
On September 2,1982, we filed an interim 10CFR50.55(e) report rega rding sheared pinion keys in Limitorque Model SB-0-25 motor operators
[ Reference (c)]. Since the time of our initial telephone report of a potential 10CFR50.55(e) deficiency [ Reference (b)], Westinghouse and Limitorque have been investigoting the causes of the sheared pinion keys. The investigations have yielded the following information:
Metallurgical evaluations of the sheared pinion keys have indicated that the keys were made of a resulfurtized carbon steel (1100 series) in lieu of the required 1018 carbon steel material. Additionally, Limitorque has conducted extensive stall tests of the SB-0-25 motor CfDW operator with the 1018 pinion key material and verified EU the adequacy of this material for its intended use.
Based O
on the currently available information, it appears that b&
the previously reported sheared pinion keys were a result 88 of the uns of inappropriate key material.
N gg Westingnouse and Limitorque are continuing to investigate this item to qu identify the Motor Operators affected and to determine what long-te rm f3 corrective actions may be required.
no w-ts bW 2HJ The applicability of this item to Seabrook [and thus its reportability or non-reportability under 10CFR50.55(e)] is contingent on the results of the
.t on going investigation by Westinghouse and Limitorque. Region I will be
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United States Nuclear Regulatory Commission October 18, 1982 Attention:
Mr. Richard W.. Starostecki, Director Page 2 notified by January 15, 1983, as to the status of the investigation. This report is being filed pursuant. to the interim reporting provision of 10CFR50.55(e)(3).
Very truly yours, YANKEE ATOMIC ELECTRIC COMPANY J. DeVincentis Project Manager JDV/ba ec: Director, Office of Inspection and Enforcement Washington, DC 20555
.