05000346/LER-1981-022-03, /03L-0:on 810316,NRC Site Inspector Reported Finding Four 0.5-inch Holes Through Control Room Equipment Room East Fire Wall.On 810403,two Holes Found in Wall of Room 427B.Caused by Personnel Error

/03L-0:on 810316,NRC Site Inspector Reported Finding Four 0.5-inch Holes Through Control Room Equipment Room East Fire Wall.On 810403,two Holes Found in Wall of Room 427B.Caused by Personnel Error

ML20003H977
Person / Time
Site:	Davis Besse
Issue date:	05/04/1981
From:	Melstad K TOLEDO EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20003H975	List: 05000346/LER-1981-022, Forwards LER 81-022/03L-0 05000346/LER-1981-022-03, /03L-0:on 810316,NRC Site Inspector Reported Finding Four 0.5-inch Holes Through Control Room Equipment Room East Fire Wall.On 810403,two Holes Found in Wall of Room 427B.Caused by Personnel Error ML20003H977
References
LER-81-022-03L, LER-81-22-3L, NUDOCS 8105080264
Download: ML20003H977 (2)

LER-1981-022, /03L-0:on 810316,NRC Site Inspector Reported Finding Four 0.5-inch Holes Through Control Room Equipment Room East Fire Wall.On 810403,two Holes Found in Wall of Room 427B.Caused by Personnel Error

Event date:
Report date:
3461981022R03 - NRC Website

text

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EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h

@ lOIP-33-81-24) On 3/16/81, at 1300 hours0.015 days <br />0.361 hours <br />0.00215 weeks <br />4.9465e-4 months <br /> the NRC Site Inspector reported finding four j 4/3/81 inch unsealed holes through the Control Room Equipment Room east fire wall. on [o l3l [

lat 1440 hours0.0167 days <br />0.4 hours <br />0.00238 weeks <br />5.4792e-4 months <br />, the NRC Site Inspector found two inch unsealed holes in the north j

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g l wall of room 427B.

In each case, There was no danger to the health and safety of the public or l

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CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h The personnel involved I

lThe cause of these occurrences was due to a personnel error.

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When the holesI lshould have filled the holes with knowool when they i i Under Maintenance work I

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I i 3 l orders 81-1837 and 81-2200 the holes were permanently filled with greut.

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70LEDO EDISON CDIPANY DAVIS-BESSE NUCIEAR PGER STATICN UNIT ONE SUPPLDIENIAL INFORMATION EUR LER NP-33-81-24 DATE OF EVENT:

March 16, 1981 and April 3, 1981 FACILITY:

Divis-Besse Unit 1 INDENTIFICATICN OF OCCURRENCE:

Unsealed half-inch holes through fire walls Conditions Prior to Occurrence: The unit was in Mode 1, with Power (Mfr) = 2042.9 and Load (Gross ME) = 684 Description of Octmrrence: On March 16,1981 at 1300 -hours, the NRC Site Inspector -

reported finding four h inch unsealed holes through the Control Rocm Equignent Focm east fire wall. The holes open into the stairway east of the 03ntrol Ibcm and appear to have been left by the rcmoval of a plate frca the wall. The holes were Wintely filled with Kav.w3ol.

On April 3, 1981 at 1440 hours0.0167 days <br />0.4 hours <br />0.00238 weeks <br />5.4792e-4 months <br />, the NFC Site Inspector found two 15 inch unsealed loles in the north wall of rocm 427B, Ioa Voltage Switchgear Room. A firewatch was es-tablished until the holes were packed with Kaowool at 1535 hours0.0178 days <br />0.426 hours <br />0.00254 weeks <br />5.840675e-4 months <br />.

In each case, the Station had entered the action statenent of Ibchnical Specification 3.7.10.

The Technical Specification requires all penetration fire barriers protect-ing safety related areas to in functional at all times. The action statement re-quires that with a penetration fire barrier inoperable, establish a continuous fire watch on at least one side of the affected penetration within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />. Both of these incidents were written up on DVR's and sulraitted April 3,1981.

Designation of Apparent Cause of Occurrence: The cause of this was personnel error as the holes should have been filled with Kaowool when they were first opened and the proper people should have been informed so the appropriate actions could have been taken to log the holes in the penetration log and to have the holes permanently filled with grout.

Analysis of Occurrence:

There was no danger to the health and safety of the public l

or to unit personnel. There was no fire which required the fire wall to have its integrity intact.

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Corrective Action

The holes were ir:frediately filled with Kaowool and under Main-tenance Work Order's 81-1837 and 81-2200, the holes were permanently filled with I

grout.

Failure Data:

Previous violations of penetration fire barriers were reported in NP-33-80-11 (80-008), NP-33-79-63 (79-060), NP-33-79-61 (79-059), and NP-33-78-137 (78-117).

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