05000346/LER-1980-047-03, /03L-0:on 800608,shift Supervisors Discovered Doors 306 & 401a Blocked Open.Apparently Caused by Lack of Administrative Controls When Temporary Signs on Doors Were Prematurely Removed Before All Permanent Signs Installed

/03L-0:on 800608,shift Supervisors Discovered Doors 306 & 401a Blocked Open.Apparently Caused by Lack of Administrative Controls When Temporary Signs on Doors Were Prematurely Removed Before All Permanent Signs Installed

ML19329F993
Person / Time
Site:	Davis Besse
Issue date:	07/03/1980
From:	Cech L TOLEDO EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19329F989	List: 05000346/LER-1980-047, Forwards LER 80-047/03L-0 05000346/LER-1980-047-03, /03L-0:on 800608,shift Supervisors Discovered Doors 306 & 401a Blocked Open.Apparently Caused by Lack of Administrative Controls When Temporary Signs on Doors Were Prematurely Removed Before All Permanent Signs Installed
References
LER-80-047-03L, LER-80-47-3L, NUDOCS 8007110448
Download: ML19329F993 (2)

LER-1980-047, /03L-0:on 800608,shift Supervisors Discovered Doors 306 & 401a Blocked Open.Apparently Caused by Lack of Administrative Controls When Temporary Signs on Doors Were Prematurely Removed Before All Permanent Signs Installed

Event date:
Report date:
3461980047R03 - NRC Website

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63 61 DOCKET NUMB ER 6d 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h l (NP-33-bO-56) On 6/8/80 at 1300 hours0.015 days <br />0.361 hours <br />0.00215 weeks <br />4.9465e-4 months <br /> during a routine plant tour, the Shift Supervisot o 2 l discovered doors 306 and 401A blocked open.

Both are negative pressure boundary doors!

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• ITT71 I and must be closed to insure the operability of the emergency ventilation system.

I loisl l This placed the station in violation of Technical Specification 3.9.12.

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.loIsl ldcoger to the health and safety of the pullic or station personnel.

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36 31 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h g lThe apparent cause was the lack of administrative controls when temporary signs on thel l doors were prematurely removed before all permanent signs were available for installa-I i i g l tion.

Permanent signs are now installed.

The doors were closed as soon as they were l

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TOLEDO EDISON COMPANY DAVIS-BESSE NUCLEAR POWER STATION UNIT ONE SUPPLEMENTAL INFORMATION FOR LER NP-33-80-56 DATE OF EVENT:. June 8, 1980 FACILITY: Davis-Besse Unit 1 IDENTIFICATION OF OCCURRENCE:

Speut Fuel Pool Negative Pressure Boundary Violoced By Blocked Open Doors 1

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~ Conditions Prior to Occurrence: The unit was in Mode 6, with Power (MWT) = 0, and Load (Cross MWE) = 0.

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Description of Occurrence: On June 8, 1980 at 1300 hours0.015 days <br />0.361 hours <br />0.00215 weeks <br />4.9465e-4 months <br />, during a routine plant tour, the Shif t Supervisor discovered that door 306, Fuel Handling Area Room 300 en the 585'. elevation, and door 401A, Fuel Handling Exte.aust Unit Room 401 on the 1

603' elevation, were blocked open.

Both are negative pressure boundary doors and l

nist be closed to insut a the operability of the Emergency Ventilation Systems i-

. servicing the fuel storage pool area. Therefore, the station was in violation of

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Technical Specification 3.9.12 which requires two independent emergency ventilation systems servicing the storage pool area to be operable whenever irradiated-fuel in in the storage pool. The action statement prohibit 7 any operations involving move-ment of fuel within the storage pool or crane operations with loads over the pool during this time. There is irradiated fuel in the pool. There were no above men-tioned operations taking place at this time.

j Designation of Apparent Cause of Occurrence: The apparent cause was the lack of j

(dministrative controls when temporary signs on the doors were prematurely removed before all the permanent signs were available for installation.

.1 Analysis of Occurrence: There was no danger to the health and safety of the public

_cr to station personnel. Had the emergency ventilation system been needed, these doors could have been closed. There were also no operations involving the movement 4

of the' fuel within the storage pool or crane operations with loads over the. storage 1

pool during this time.

Corrective Action

The doors were closed as soon as they were discovered open. Per-manent signs are now installed on the doors reading, " NEGATIVE PRESSURE BOUNDARY -

1 KEEP CLOSED".

j Failure Data: There have been no preceiously reportable similar occurrences..

4 LER #80-047 d.

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