ML20041B800

LER 82-004/03L-0:on 820122,door 108 to Detergent Waste Drain Tank & Pump Room Found Open.Caused by Worker Disregarding Sign on Door.New Signs Will Be Added to Elaborate Requirement to Close Door

ML20041B800
Person / Time
Site:	Davis Besse
Issue date:	02/19/1982
From:	Stolz J, Wolfe R TOLEDO EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20041B796	List: ML20041B795 ML20041B800
References
LER-82-004-03L, LER-82-4-3L, NUDOCS 8202250214
Download: ML20041B800 (1)

Text

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7 8 60 61 DOCK ET NUMB ER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h lo121 l (NP-33-82-05) On January 22, 1982, an operator found door 108 to the Deternent waste 1

[ o ; 3 g ] Drain Tank and Pump Room lef t open. This is a watertight fire door which forms part I g l of the negative pressure boundary for the Emer;:ancy Ventilation System (EVS) . With l lois; j the door open, the effectiveness of the EVS would be reduced. Technical Specificationi lo is I i 3.6.5.1 requires the EVS to be operable in Modes 1, 2, 3, and 4. There was no danner l l 0 l 7 l l to the health and safety of the public or station personnel. The door is normally l 1OfiR I accessible and could have been closed had the EVS been needed. I 7 8 9 80 SYSTEM CAUSE CAUSE COMP. VALVE CODE CODE SUBCODE COMPONENT CODE SUBCODE SUBCODE l o l '3 l

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44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h 1 i l o l l The door was open because a worker did not close it and latch the dons. This is a l li li l l personnel error in that the worker disregarded the signs on the door stating that it I

, 7 lmust remain closed at all times except for normal passage. The importance of closing I jil3l l doors will be addressed in General Orientation Training. New signs will be added to j l

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[ TOLEDO EDISON COMPANY DAVIS-BESSE NUCLEAR POWER STATION UNIT ONE SUPPLEMENTAL INFORMATION FOR LER NP-33-82-05 DATE OF EVENT: January 22, 1982 FACILITY: Davis-Besse Unit 1 IDENTIFICATION OF OCCURRENCE: Emergency Ventilation System (EVS) door 108 left open Conditions Prior to Occurrence: The unit was in Mode 1 with Power (MWT) = 2422 and Load (Gross MWE) = 780.

Description of Occurrence: On January 22, 1982, an operator making his evening rounds found door 108 to the Detergent Waste Drain Tank and Pump Room left open.

This is a watertight fire door which is part of the negative pressure boundary for the EVS for the Auxiliary Building. Had the EVS been needed, its effectiveness would have been reduced. Technical Specification 3.6.5.1 requires two systems to be operable in Modes 1, 2, 3, and 4. When the operator closed this door, it re-stored the operability of the system, meeting the Technical Specification require-ments.

Designation of Apparent Cause of Occurrence: This door was left open by a worker going through and not pulling it closed and latching the dogs. This occurrence was personnel error in that the workers disregarded signs on the door stating that this door must be closed at all times except for normal passage.

Analysis of Occurrence: There was no danger to the health and safety of the public or to station personnel. The plant was in Mode 1 so the EVS was required to be operable. The operator met Technical Specifications by closing this door and re-instating thin system's operability. The door could have been closed had EVS been l started.

1 Corrective Action: This watertight fire door requires a worker to pull it closed and latch it. This will be addressed in General Orientation Training and new signs will be made up and attached to the doors informing personnel to pull it closed and not leave it open unattended.

l Faj1ure Data: Previous similar failures were rcported in Licensee Event Reports NP-33-82-04 (82-003), NP-33-81-91 (81-076) , NP-33-81 -67 (81 -05 5) , NP-11-81 -4 7 (81-042) and NP-33-81-06 (81-007).

LER #82-004 I

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