ML19350B302
| ML19350B302 | |
| Person / Time | |
|---|---|
| Site: | FitzPatrick  |
| Issue date: | 03/02/1981 |
| From: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Pasternak R POWER AUTHORITY OF THE STATE OF NEW YORK (NEW YORK |
| References | |
| NUDOCS 8103200231 | |
| Download: ML19350B302 (1) | |
Text
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'o UNITED STATES g g}g 8
NUCLEAR REGULATORY COMMISSION y
REGION I oo i 631 PARK AVENUE
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- D KING OF PRUSSIA, PENNSYLVANIA 19406 Docket No. 50-333 MAR 2 1981
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Power Authority of the State of New York
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N,,/!R j g IS8 p3 James A. FitzPatrick Nuclear Power Plant
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p ATTN:
Mr. R. J. Pasternak im">3,sDfugr,fg Resident Manager -
pg P. O. Box 41 cc e
B 4' 7 Lycoming, New York 13093
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N7 Gentlemen:
The encloced IE Circular No. 81-03, " Inoperable Seismic Monitoring Information" is forwarced to you information.
No written response is required.
If you desire adcttional information regarding this matter, please contact this office.
Sincerely, g
Boyce H. Grier Director
Enclosures:
1.
IE Circular No. 81-03 2.
List of Recently Issued IE Circulars CONTACT:
S. D. Ebneter (215-337-5266) cc w/encls:
George T. Berry, President and Chief Operating Officer J. P. Bayne, Senior Vice President-Nuclear Generation A. Klausmann, Director, Quality Assurance M. C. Cosgrove, Site Quality Assurance Engineer J. F. Davis, Chairman, Safety Review Committee C. M. Pratt, Assistant General Counsel G. M. Wilverding, Manager-Nuclear Licensing
'B'10320 0 W 1-9
SSINS No.: 6330 Accession No.:
6008220271 IEC 81-03 UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C.
2055E March 2, 1981 IE Circular No. 81-03: INOPERABLE SEISMIC MONITORING INSTRUMENTATION Description of Circumstances:
On November 8, 1980, an earthquake occurred off the coast near Eureka, California.
The earthquake was reported to have a magnitude of 7.0 on th.
chter Scale at the epicenter, approximately 25 to 75 miles from the Hu.'
.y Power Plant facility.
There were 12 separate seismic events above a
,nitude of 3.5 that occurred within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> of the earthquake, the largest event measuring 5.2.
Reported damage to structures included several houses that were moved off supporting posts, various chimneys that were knocked down, one highway overpass that collapsed, and unspecified damage that occurred at two pulp mills.
There were three potentially different sources of plant response data: three sets of magnetic tape triaxial accelegraph recorders; three sets of triaxial film recorders (passive device); and one set of triaxial response spectrum recorders (passive device). A review of the records from these instruments indicated the following: the magnetic tape triaxial recorders did not produce useful records due to a degraded low-voltage power supply in the recording system (previously scheduled for routine servicing one week after the earthquake);
a buildup of dirt and dust appeared to make inoperable six of the nine film recorders (the readings from the other three are considered highly unreliable and were not obtained from the same set of triaxial recorders); the triaxial response spectrum recorder was the only instrument believed to produce reliable data.
On January 24, 1980, an earthquake measuring 5.5 on the Richter Scale occurred about 10 miles north of Lawrence Livermore. Laboratory (near San Francisco, California). Numerous aftershocks also occurred with one measuring 5.2 on January 26. The damage to civil structures was considered minor.
Rancho Seco Nuclear Plant, located approximately 45 miles northeast of the earth-quake area, reported no physical damage, although plant personnel felt slight building motion.
Rancho Seco was shutdown for refueling during these earthquakes.
During this period, the electrical seismic. instrumentation system was inoperable because portions of the system were out for calibration.
For the other instruments, power was not being supplied due te -? - 'r'-
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seismic instrumentation would have DUPLICATE DOCUMENT U.S. Geological Survey equipment cl from a passive recorder showed pea Entire docurent previously entered into system under:
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