PNO-I-80-168, on 801117,reactor Tripped Due to Low Steam Pressure Signal.Caused by Placing Wrong Channel in Trip When Intermittent Fault Became Evident on Another Instrument. Outage Expected to Last Two Days for Reboration & Repairs
| ML19345A987 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 11/17/1980 |
| From: | Brunner E, Mccabe E NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | |
| References | |
| PNO-I-80-168, NUDOCS 8011250542 | |
| Download: ML19345A987 (1) | |
PRELIMINARY NOTIFICATION Date:
November 17, 1980 PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE--PNO-I 168 This preliminary notification constitutes EARLY notice of events of POSSIBLE safety or public interest significance.
The information presented is as initially received without verification or evaluation and is basically all that is known by IE staff on this date.
Facility:
Duquecne Light Company Beaver Valley, Unit 1 (CN 50-334)
Shippingport, PA Subiect:
REACTOR TRIP AND SAFETY INJECTION At 2:03 p.m., November 17, 1980, the reactor tripped due to a low steam pressure signal. Cause appears to have been the placing of the wrong channel in trip when an intermittent fault became evident on another instrument. Since the HPSI pump shutoff head is above operating pressure, s'ater was injected. After completing required checks, safety injection was secured at 2:11 p.m.
Before the trip, reactor power was E-6 amps in the intermediate range (1 decade below the power range). There is no significant power history on the core. There were no radiation alarms or primary pressure decreases.
The outage will last at least 2 days while boron injection tank reboration and equipment repairs required before mode change are effected.
Neither the licensee nor the NRC plans a press release.
Region I will respond to media inquiries. Tt.a Commonwealth of Pennsylvania has been informed.
NRC, Region I. received notification of this event by telephone from the SRI in the control room at 2:26 p.m., November 17, 1980.
An ENS report was made to the NRC duty officer about 2:30 p.m.
Contact:
E. C. ficCabe 488-1251 E. J. Brunner 488-1240 DISTRIBUTION:
(Facsmile Transmission Times Noted)
H ST BLDG MARYLAND NATIONAL IE:XOOS Chairman Ahearne BANK BUILDING
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NRC/TMI Program Comissioner Gilinsky W. J. Dircks, EDO Office Commissioner Bradford C. Michelson, AE00 Comissioner Hendrie J. J. Fouchard, PA Region II ACRS N. M. Haller, MPA Region III -
S. J. Chilk, SECY G. W. Kerr, OSP Region IV C. C. Kammerer, CA H. K. Shapar, ELD Region V WILLSTE BLDG RI Resident Sites J. G. Davis,I#ET
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PHILLIPS BLDG H. R. Denton, NRR R. H. Vollmer, NRR LANDOW BLDG (Fax by HQ)
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F. Schroeder, NRR (6 MIN /PAGE)
R. Minogue, 50 D. F. Ross, NRR J. J. Cummings, OIA IE:XOOS D. Eisenhut, NRR
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S. H. Hanauer, NRR j g w " [ S. Ebbin, NSOC PRELIMINARY NOTIFICATION Region I Form 83 (Rev. October 1980) 3 011250 SD
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