PNO-III-87-118C, on 870911,augmented Insp Team Completed Review of Circumstances Surrounding 870906 Reactor Trip & Subsequent Equipment Problems.Meeting Scheduled for 870915 to Discuss Issues Re Plant Startup & Results of Review

PNO-III-87-118C:on 870911,augmented Insp Team Completed Review of Circumstances Surrounding 870906 Reactor Trip & Subsequent Equipment Problems.Meeting Scheduled for 870915 to Discuss Issues Re Plant Startup & Results of Review

ML20239A584
Person / Time
Site:	Davis Besse
Issue date:	09/14/1987
From:	Defayette R, Guldemond W NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
To:
References
PNO-III-87-118C, NUDOCS 8709170492
Download: ML20239A584 (1)

_ _ _.

e b m LS PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE--PNO-III-87-118C Date September 14, 1987 This preliminary notification constitutes EARLY notice of events of POSSIBLE safety or public interest significance. The information is as initially received without [

verification or evaluation, and is basically all that is known by the Region III staff on this date. 1 l

Facility: Toledo Edison Company Licensee Emergency Classification:

Davis-Besse Notification of an Unusual Evert i Oak Harbor, OH 43449 Alert I Site Area Emergency Docket No. 50-346 General Emergency l X Not Applicable

Subject:

REACTOR TRIP DUE TO EQUIPMENT MALFUNCTION; AIT DISPATCHED TO PLANT (THIRD UPDATE) l l On September 11, 1987, the Augmented Inspection Team (AIT) completed its review of the l circumstances surrounding the September 6,1987, reactor trip and subsequent equipment

problems.

l As a followup to AIT inspection, the resident inspectors and an inspector from Region III (Chicago) reviewed the status of maintenance on several systems involved with the reactor trip and related problems on September 12-13. Six systems were selected at random to determine their readiness to support plant restart and power operation. The systems were main feedwater, l auxiliary feedwater, integrated control system, station instrument air, generator hydrogen, l and generator seal oil. The special review included examination of outstanding maintenance l requests and a complete walkdown of the six systems. Additional systems were subjected to a partial walkdown.

l The inspectors concluded that the maintenance backlog for the systems should not affect the l

continued ability of the systems to perform their functions and that the backlog records ,

accurately reflect the condition of the systems examined. l A meeting is scheduled between the NRC staff and licensee management on September 15, 1987, i in Bethesda, Maryland, to discuss issues relating to the startup of the unit, including the results of the licensee's review of the September 6, 1987, reactor trip.

The State of Ohio will be informed of this updated information.

This information is current as of 4 p.m., September 14,19 7.

l CONTACT: N.DeFayettekFTS 388-5767) ,

ifiIfemond(FTS3 - 574)

DIST7.IBUTION:

1 H. St. ED0 NRR E/W Willste Mail: ADM:DMB l Chairman Zech PA IE NMSS DOT:Trans only i

! Comm. Roberts ELD OIA RES l l Comm. Bernthal AE0D NRC Ops Ctr 8 f cp

! Comm. Cair i Ccmm. Rogers ACRS SP Regional Offices 87 a : 31 INP0 g 5 NSAC I PDR RIIIResidentOffige Licensee: 75 E (Corp. Office - Reactor Lic. Only) 8709170492 870914 I

N-IhB7-118PDR Region III Rev. August 1987 L6Jf a

_ ____