ML20010E953
| ML20010E953 | |
| Person / Time | |
|---|---|
| Site: | Pilgrim |
| Issue date: | 08/19/1981 |
| From: | Ippolito T Office of Nuclear Reactor Regulation |
| To: | Morisi A BOSTON EDISON CO. |
| References | |
| NUDOCS 8109090177 | |
| Download: ML20010E953 (2) | |
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Docket No. 50-7.93 y
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AUG 191981 g
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Mr. A. Victor Marisi 4
Boston Edison Company j
M/C NUCLEAR
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9 800 Boylston Street C
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Boston, Massachusetts 02199
Dear Mr. Motisi:
In our-letter of May 1980 we reconnended that you initiate a -program to inspect the keyway ar.l bore areas of your low pressure discs for stress corrosion cracking. This action was prompted by the discovery of such l_
cracks in Westinghouse turbines.
So far, the inspection program has covered one or more low pressure rotors at 15 nuclear plants using GE turbines. No clear indication of stress corrosion cracking has been discovered, although indications of water cutting and/or erosion have been observed in several turbines.
In view'of these findings, we have decided to discontinue the NRR staff-mcnitoring of these inspections. Normal activities of the Office of Inspection and Enforcement will continue of course.
We reconsnend that you continue to perform disc inspections, as appropriate, and continue to work with the General Electric Company to' establish safe inspection schedules. Should you find any significant degradation, such as stress corrosion cracking, we would expect you to promptly report it in the normal manner.
L Sincerely, t
orlainal signed t,y I. A. Ippolito Thomas A. Ippolito, Chief Operating Reactors Branch #2 cc See next page Division of Licensing Distribution Docket File M. Williams NRC PDR Ot' D Local-PDR IE (3)
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Mr. A. Victor Morisi Boston Edison Company cc:
Mr. Richard D. Machon Pilgrim Station Manager Boston Edison Company RFD #1, Rocky Hill Road Plymouth, Massachusetts 02360 Henry Herrmann, Esquire Massachusetts Wildlife Federation 151 Tremont Street Boston, Massachusetts 02111 Plynouth Public Library f6rth Street Plymouth, Massachusetts 02360 Resident Inspector c/o U. S. NRC P. O. Box 867 Plymouth, Massachusetts 02360
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