ML20132G738

Forwards Rev 1 to Procedure 1A,1B, Auxiliary Feed Pumps Overspeed Trips, Rev 0 to Procedure 10, Review of Operation of PORV & Rev 2 to Procedure 12, Auxiliary Feedwater Sys Valve Problem Analysis (AF 599 & AF 608)

ML20132G738
Person / Time
Site:	Davis Besse
Issue date:	06/27/1985
From:	Rossi C NRC - TEAM ON DAVIS-BESSE EVENT
To:	Holahan G, Jordan E NRC OFFICE OF INSPECTION & ENFORCEMENT (IE), Office of Nuclear Reactor Regulation
Shared Package
ML20132G743	List: ML20132G738 ML20132G745 ML20132G750 ML20132G756
References
NUDOCS 8508050126
Download: ML20132G738 (1)

Text

r NN 2 7 35 NOTE T0: Edward L. Jordan, Director DISTRIBUTION Division of Emergency Preparedness NRC PDRV and Engineering Response, IE AE00 S/F E. Rossi Gary M. Holahan, Chief J. T. Beard Operating Reactors Assessment Branch, DL, NRR W. Lanning L. Bell FROM: Charles E. Rossi, Davis-Besse Event T. Ippolito Fact Finding Team Leader

SUBJECT:

LICENSEE TROUBLESHOOTING PLANS TO DETERMINE EQUIPMENT MALFUNCTION CAUSES ,

Attached are three equipment troubleshooting plans obtained from the Davis-Besse licensee:

1) Auxiliary Feed Pumps Overspeed Trips

2) Review of the Operation of the PORV

3) Auxiliary Feedwater System Valve Problem Analysis (AF 599 & 608)

These plans discuss the hypotheses identified to date by the licensee for the causes of equipment problems which occurred during the June 9,1985 event. These are being forwarded to you for your consideration in any generic communications to be issued on the event.

It should be noted that the fact finding team has not at this time reached any definite conclusions on root causes for the various equipment problems.

Conclusions will not be reached until the licensee has completed the trouble-shooting and the team has reviewed the licensee's test results and analyses for identifying root causes.

As/

Charles E. Rossi, Davis-Besse Event Fact Finding Team Leader

Attachment:

As Stated cc w/

Attachment:

W. Dircks H. Denton J. Taylor V1 J. Keppler '

7 H. Thompson ,.

J. Heltemes y' FFT ERossi:kb 6/y85 8500050126 850627 PDR ADOCK 05000346 P pop