PNO-III-89-058B, on 890922,licensee Took Initial Steps to Restart UF6 Conversion Process Shutdown Since 890829.Util Upgraded Safety of Conversion Process,Including Usage of Vital Equipment Repair Statusboard.New Stack Sys Designed

PNO-III-89-058B:on 890922,licensee Took Initial Steps to Restart UF6 Conversion Process Shutdown Since 890829.Util Upgraded Safety of Conversion Process,Including Usage of Vital Equipment Repair Statusboard.New Stack Sys Designed

ML20248C126
Person / Time
Site:	07000036
Issue date:	09/22/1989
From:	Mallett B, Sreniawski D NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
To:
References
PNO-III-89-058B, PNO-III-89-58B, NUDOCS 8910030373
Download: ML20248C126 (2)

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PRELIMINARY NOTIFICATION0F EVENT OR UNUSUAL OCCURRENCE PHO-III-58B Date Stptember 22,.1989

.c .

B This preliminary notification constitutes EARLY. notice of events of POSSIBLE.

'p i safcty or public interest significance. The information is as initially received d without' verification or evaluation, and is. basically all that is known by the RegionIII staff on this date.

Fccility: Combustion Engineering, Inc. Licensee Emergency CE Hematite:- Classification:

liematite, Missouri Unusual Event -l Alert i

' Docket No. 7 M036 Site Area Emergency _!

L General Emergency 1 X Not' Applicable

]

Subjecti POTENTIAL UF6 RELEASE-(SECOND UPDATE) l l

On September 22,-1989, the licensee took the latt1a1 steps to restart its i uranium-hexafluoride (UF6) conversion process, which has.been shut down since

August 29,:1989, as the result of an unplanned UF6 stack release on

. August 28,.1989. (See PNO-III-89-58A) A Region III (Chicago) fuel facility j

-inspector is on site monitoring the restart.  ;

During the downtime, the licensee upgraded the safety of the conversion process, including usage of a vital equipment repair status board for all citems which are required to be operational. The board item must be reviewed and signed off by'the shift supervisor before start-up of the system. On_1y the shift supervisor has the key to unlock the control for start-up..

The nitrogen feed control-valve, whost failure resulted'in the release, ~'

J has been interlocked to the UF6-feed line so that the conversion process cannot;takel place unless the valve.is operational. A position indicator

. light has been instelled on-the control panel to show the_ status of each' of the nitrogen valves, j i

1A new, improved stack monitoring system also has been designed, installed

, and tested. The NRC inspector verified that all these systems and procedures were in place as of 1:00 p.m. (CDT), September 22, 1989.

,:The State"of Missouri will be notified.

This information is current as of 3:30 p.m. (CDT), September 22, 1989.

c 4 0 %.k D. i If%.S.Mallett i

CONTACT:' reniawski FTS 388-5611 FTS 388-5612 ef / '

1 o \  ;

i -!

i 8910030373 890922

.PDR 18cE

, .PNO-III-05BB PNU .-. .

3

PR ARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE--PNO-III-58B Date Septcmber 27, 1989

/ _,_

. DISTRIBUTION:

HEAD 00ARTERS OFFICES Ehairman Carr tlilRC1718/CARRPN) NM55 (TNRC0506 &

Comm. Roberts (lNRC1718/ WRIGHT) 1NRC0304/NRRPN)

Comm. Rogers (lNRC1718/ VAN CISE) GPA: SLIP (lNRC0304/SLIPN) i l

Comm. Curtiss (lNRC1718/CURTISPN) GPA:PA (1NRC02/0PAPN)

ED0 (1NRC1718/ED0PN) AEOD (NRCRH/AE0DPN) i G:n.' Counsel (lNRC1516/0GCPN) *01G (NRCRMP/0IGDV)

NRR (lNRC1112/NRRPN) *ASLAP (NRCRMP/ASLAPDW)

GPA:CA (lNRC1718/0CAPN) Research (NRCRES/RESPN) 1NRC1718/GRIGGS)  !

Enforcement (lNRC0708/0EPN)

REGIONS MAIL T0: FAX T0:

~

R gion I (NRCRI/RIPN) DCS (Orig.) INP0 R:gion II (NRCRII/RIIPN) DOT (Trans. NSAC -

R;gion III (NRCRIII/RIIIPN) Only) LIC -

Region ~IV (NRCRIV/RIVPN) NRC OPS CTR WO3 Region V (NRCRV/RVPN) PDR (8/634-3R3 T 4/1 0 I cDenotes a Displaywriter/PC not an IBM 5520 Terminal. '

Rev. 07/20/89 I

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