PNO-III-86-154, on 861222,reactor Tripped from 15% Power During Testing of Integrated Control Sys.Caused by Decrease in Steam Generator Water Level Due to Feedwater Sys Control Valve Closure.Licensee Investigating Cause of Valve Closure: Difference between revisions
StriderTol (talk | contribs) StriderTol Bot insert |
StriderTol (talk | contribs) StriderTol Bot change |
||
| Line 14: | Line 14: | ||
| page count = 1 | | page count = 1 | ||
}} | }} | ||
{{#Wiki_filter:: PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE--PNO-III-86-154 Date December 23, 1986 This preliminary notification constitutes EARLY notice of events of POSSIBLE safety or public interest significance. The information is as initially received without ~ | {{#Wiki_filter:: PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE--PNO-III-86-154 Date December 23, 1986 hyh This preliminary notification constitutes EARLY notice of events of POSSIBLE safety or public interest significance. The information is as initially received without ~ | ||
Facility: Toledo Edison Company | v;rification or evaluation, and is basically all that is known by the Region III staff on this date. | ||
Davis-Besse Nuclear Plant | Facility: Toledo Edison Company Licensee Emergency Classification: | ||
Davis-Besse Nuclear Plant Notification 'of an Unusual Event Oak Harbor, OH 43449 Alert Site Area Emergency Docket No. 50-346 GeneralEmergencyh Not Applicable X | |||
==Subject:== | ==Subject:== | ||
| Line 23: | Line 24: | ||
The licensee is investigating the cause of the control valve closure. Once the cause is identified and corrected, the licensee plans to take the plant to a level not exceed 40 percent power and stabilize the plant at that point through the Christmas holiday. The augmented inspection team is on site and monitoring the licensee's evaluation of the reactor trip. | The licensee is investigating the cause of the control valve closure. Once the cause is identified and corrected, the licensee plans to take the plant to a level not exceed 40 percent power and stabilize the plant at that point through the Christmas holiday. The augmented inspection team is on site and monitoring the licensee's evaluation of the reactor trip. | ||
The State of Ohio will be notified. | The State of Ohio will be notified. | ||
R:gion III (Chicago) was notified of the reactor trip about 11:15 p.m. (EST), December 22, 1986, by the Headquarters Duty Officer. This information is current as of 10 a.m. (EST), | R:gion III (Chicago) was notified of the reactor trip about 11:15 p.m. (EST), December 22, 1986, by the Headquarters Duty Officer. | ||
This information is current as of 10 a.m. (EST), | |||
December 23, 1986. | December 23, 1986. | ||
fh y | fh y | ||
W. G. Guldemond FTS 388-576/ | f&k./hwn | ||
l | ~ | ||
Conn. Bernthal Com. Carr | CONTACT: R.DeFayetke W. G. Guldemond FTS 388-576/ | ||
FTS 388-5574 1 | |||
DTSTRIBUTION: | |||
l H. St. | |||
EDO NRR E/W Willste Mail: | |||
ADM:DMB l | |||
Chairman Zech PA IE NMSS 00T:Trans only l | |||
Com. Roberts ELD OIA RES Com. Asselstine AE00 NRC Ops Ctr | |||
/ /,' k ? | |||
Conn. Bernthal Com. Carr SP M 27 7 Regional Offices ACRS SECY INP0 )[,*/). | |||
NSAC //,/4 M3h CA RIII Edsident OffLct PDR Licensee: | |||
///.L3 | |||
,(Corp. Office - Reactor Lic. Only) 87011ho194861223 3 | |||
Region III ggggbe6-154PDR Rev. November 1986}} | |||
{{PNO-Nav|region=III}} | {{PNO-Nav|region=III}} | ||
Latest revision as of 07:14, 4 December 2024
| ML20212F858 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 12/23/1986 |
| From: | Defayette R, Guldemond W NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | |
| References | |
| PNO-III-86-154, NUDOCS 8701120194 | |
| Download: ML20212F858 (1) | |
- PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE--PNO-III-86-154 Date December 23, 1986 hyh This preliminary notification constitutes EARLY notice of events of POSSIBLE safety or public interest significance. The information is as initially received without ~
v;rification or evaluation, and is basically all that is known by the Region III staff on this date.
Facility: Toledo Edison Company Licensee Emergency Classification:
Davis-Besse Nuclear Plant Notification 'of an Unusual Event Oak Harbor, OH 43449 Alert Site Area Emergency Docket No. 50-346 GeneralEmergencyh Not Applicable X
Subject:
REACTOR TRIP At 10:15 p.m. (EST), on December 22, 1986, the reactor tripped from 15 percent power during testing of the Integrated Control System. The startup feedwater system control valve closed during a test that was intended to demonstrate that the startup feedwater system would control steam generator level. Steam generator water level decreased, causing the reactor trip.
An NRC inspector was in the control room during the incident and determined that all safety systems functioned as expected. Operator response was good.
The licensee is investigating the cause of the control valve closure. Once the cause is identified and corrected, the licensee plans to take the plant to a level not exceed 40 percent power and stabilize the plant at that point through the Christmas holiday. The augmented inspection team is on site and monitoring the licensee's evaluation of the reactor trip.
The State of Ohio will be notified.
R:gion III (Chicago) was notified of the reactor trip about 11:15 p.m. (EST), December 22, 1986, by the Headquarters Duty Officer.
This information is current as of 10 a.m. (EST),
December 23, 1986.
fh y
f&k./hwn
~
CONTACT: R.DeFayetke W. G. Guldemond FTS 388-576/
FTS 388-5574 1
DTSTRIBUTION:
l H. St.
ADM:DMB l
Chairman Zech PA IE NMSS 00T:Trans only l
Com. Roberts ELD OIA RES Com. Asselstine AE00 NRC Ops Ctr
/ /,' k ?
Conn. Bernthal Com. Carr SP M 27 7 Regional Offices ACRS SECY INP0 )[,*/).
NSAC //,/4 M3h CA RIII Edsident OffLct PDR Licensee:
///.L3
,(Corp. Office - Reactor Lic. Only) 87011ho194861223 3
Region III ggggbe6-154PDR Rev. November 1986