ML19247A943
| ML19247A943 | |
| Person / Time | |
|---|---|
| Site: | Maine Yankee |
| Issue date: | 07/05/1979 |
| From: | Harold Denton Office of Nuclear Reactor Regulation |
| To: | Roth M AFFILIATION NOT ASSIGNED |
| References | |
| NUDOCS 7908030589 | |
| Download: ML19247A943 (1) | |
Text
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July 5,1979
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Distribution Docket files 50-309 TSB r/f f
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PCFine e sen lir. l'cKie Wing Roth, Jr.
P. O. Box 50 Eath, ME 04530
Dear Mr. Roth:
11, 1979 about the seismic instrur.ents This is in reply to your letter of Juneat the Maine Yankee Atomic Powe 1979.
The following infomation was reported to the NRC staff c'uring telephone conversations with !!aine Yank.ee personnel on April 18 and 19,1979:
operation of the accelerograohs was t
18, 1979, On April Due to corrosion of contacts, it was detemined checked.
that control room annunciation would not have occurred if Furthemore, the upper either recorder had triggered.
i recorder my not have operated during the earthquake for the Proper operation of the icwer recorder was same reason.
The film sas developed and confimed that the i
demonstrated.
l instrument had not triggered.
i l
The recorders were set to trigger for a vertical acceleration of 0.01 g or i
more.
I I nope this clarifies the matter.
Sincerely, c:
<~
h. '. - :.1 Harold R. Centon, Director Office of Nur' ear Reactcr Regulation bcc:
Commissicner Bradford f
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