ML19256C895
| ML19256C895 | |
| Person / Time | |
|---|---|
| Site: | Duane Arnold  |
| Issue date: | 07/19/1979 |
| From: | Bryan S, Klingler G, Stone J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| To: | |
| References | |
| PNO-79-263, NUDOCS 7910150706 | |
| Download: ML19256C895 (1) | |
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PRELIMINARY NOTIFICATION
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July 19,1979 PREL1HIRARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE--PNG-79-263 This preliminary notification constitutes EARLY notice of events of POSSIBLE safety or public interest sienificance.
The information presented is as
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initially received without verification or evaluation and is basically all that is Known by IE staff on this date.
Facility:
Iowa Electric Light and Power Company Duane Arnold Energy Center, Palo, Iowa (DN 50-331)
Subject:
REACTOR SCRAM ON TURBINE TRIP-REACTOR SHUTDOWN FOR GREATER THAN 48 HOURS The licensee telephoned RIII at 9:30 a.m., on July 18, 1979, to report that the reactor had scramed from 100% power at 8:04 a.m. on the same day.
The reactor scram resulted from a turbine trip which was caused by an exhaust hood high temperature.
Subsequent to the turbine trip a low low vater level spike occurred (normal evolution on a turbine trip from high power level).
The level transient resulted in a Group I isolation and initiation of HPCI and RCIC.
All safety related equipment performed as required in response to a Group I isolation transient.
The licensee has decided to keep the unit shutdown to effect repairs te some steam leaks in the heater bay and to make a drywell entry to complete to valve alignment check required by IE Bulletin No. 79-08.
Scheduled startup of the unit is the evening of July 21, 1979.
News media has shown interest and Iowa Electric has issued a press release.
The State of Iowa has been informed.
The above information is correct as of 2:00 p.m., July 18, 1979.
Contact:
J. Stone, IE x28019 G. Klingler, IE x28019
- 5. Bryan, IE x28019 Distribution:
Transmitted H St Chairman Hendrie Commissioner Bradford S. J. Chilk, SECY Commissioner Kennedy Commissioner Ahearne C. C. Kammerer, CA Commissioner Gilinsky ACRS (For Cistribution) iransmitted:
KNBB P. Bldg /4.hD I V. Stello, IE L. V. Gossick, EDO H. R. Denton, NRR Region H.
L. Ornstein, EDO R. C. DeYoung, NRR J. J. Fouchard, PA R. J. Mattson, NRR N. M. Haller, MPA D. Vassallo, NRR (MAIL)
R. G. Ryan, OSP D. Eisenhut, NRR J. J. Cummings, DIA H. K. Shapar, ELD SS Bldg R. Minogue, SD r
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W. J. Dircks, NHSS S. Levine, RES 2no0o 1nA1 PRELIMINARY NCTIFICATION 7910'.50 N j/fg
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