PNO-IV-89-052C, updates 890818,21 & 23 Unplanned Reactor Shutdowns Due to Inoperable Control Rod.Control Rod Assembly Will Be Removed Using Bldg Crane.Aluminum Shutter Will Be Remotely Placed on Bottom of Canister

PNO-IV-89-052C:updates 890818,21 & 23 Unplanned Reactor Shutdowns Due to Inoperable Control Rod.Control Rod Assembly Will Be Removed Using Bldg Crane.Aluminum Shutter Will Be Remotely Placed on Bottom of Canister

ML20246G168
Person / Time
Site:	Fort Saint Vrain
Issue date:	08/25/1989
From:	Mullikin R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
To:
References
PNO-IV-89-052C, PNO-IV-89-52C, NUDOCS 8908310238
Download: ML20246G168 (2)

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+ August 25, 1989 l PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE -- PNO-IV-89-52C This preliminary notificatica 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 IV staff on this date.

FACILITY: Public Service Company of Colorado Licensee Emergency Classification:

Fort St. Vrain Notification of Unusual Event Docket: 50-267 Alert Site Area Emergency General Emergency X Not Applicable

SUBJECT:

UPDATE OF UNPLANNED REACTOR SHUTDOWN DUE TO INOPERABLE CONTROL R0D This is a further update to the preliminary notification issued on August 18, 1989, and updated on August 21 and 23, 1989.

The licensee is planning to remove the control rod assembly using the building crane. The control rod will be shielded during removal by a lead filled, shielded canister which will be attached to the crane I-beam using chain falls.

The control rod assembly will be lifted free and the assembly and shielded canister will be moved together to the licensee's hot service facility. An aluminum shutter will be remotely placed on the bottom of the canister to contain any loose parts during transfer.

At approximately 5 p.m. MDT, August 25, 1989, the licensee will perform a dry run using a spare control rod drive assembly and the personnel which will do the actual removal. If this evolution is successful, the actual removal will commence after the dry run.

The removed control rod assembly will be inspected in the licensee's hot service facility. The licensee has committed by letter to meet with the NRC staff to discuss the apparent csuse of the control rod failure prior to any attempt to restart.

Additional regional personnel are assisting the resident inspectors in observing the licensee's actions.

Neither the licensee nor the NRC plans to issue a press release. The licensee and the NRC are prepared to respond to news media inquiries.

The state of Colorado will be informed.

This information has been confirmed with a licensee representative.

CONTACT: R. Mullikin, FTS 728-8250 o\

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Chmn. Carr CA NM55 7E07 RES DOT (Transp. Only)

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Comm. Curtiss PA OI TWO Te~gions & HQ) '

ACRS ED0 SLITP H-St PDR DE TDT NSAC EW-W RRI ISIXP NRC Ops Ctr Licensee (Reactor)

DISTRIBUTION:

NRCRES, RESPli Research (Paula Dorm)

NRCRM, AE0D AE0D (Patty Wilson)

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NRCRMP, OIGDW Inspector & Auditor (Displaywriter/PC)

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INRC02, OPAPN GPA:Public Affairs (Glady Ordaz)

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INRC0708, OEPN Enforcement (Betty Summers)

INRC1112, NRRPN Nuclear Reactor Regulation (Donna Berean)

INRC1516, OGCPN General Counsel (Edna Downs)

INRC1718, CARRPN Chairman (Lois Altoft)

INRC1718, ED0PN Executive Director for Operations (Doris Day)

INRC1718, OCAPN GPA: Congressional Affairs (Janice Hester)

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