05000346/LER-1978-117-03, /03L-0:on 781124,during Installation of Security Sys,Const Procedure Failed to State Tech Specs.Caused by Failure of Maint Instructions in Facility Change Request 78-083 to State Requirements of Tech Spec 3.7.10

/03L-0:on 781124,during Installation of Security Sys,Const Procedure Failed to State Tech Specs.Caused by Failure of Maint Instructions in Facility Change Request 78-083 to State Requirements of Tech Spec 3.7.10

ML20027A577
Person / Time
Site:	Davis Besse
Issue date:	12/22/1978
From:	Naylor R TOLEDO EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20027A576	List: 05000346/LER-1978-117, Forwards LER 78-117/03L-0 05000346/LER-1978-117-03, /03L-0:on 781124,during Installation of Security Sys,Const Procedure Failed to State Tech Specs.Caused by Failure of Maint Instructions in Facility Change Request 78-083 to State Requirements of Tech Spec 3.7.10
References
LER-78-117-03L, LER-78-117-3L, NUDOCS 7812290208
Download: ML20027A577 (2)

LER-1978-117, /03L-0:on 781124,during Installation of Security Sys,Const Procedure Failed to State Tech Specs.Caused by Failure of Maint Instructions in Facility Change Request 78-083 to State Requirements of Tech Spec 3.7.10

Event date:
Report date:
3461978117R03 - NRC Website

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EVENT DEScalPTION AND PROBABLE CONSECUENCES o 12 l l On 11/24/78, it was discovered that during the installation of the new security sys-l tem, that the procedure used by construction did not state the requirements of Tech-l o#3j l o 141 I nical Specification 3.7.10, which requires a fire watch be established if a fire bar-l 01s1 I rier is not functional. A fire watch was not established when a 6" penetration reducqd i o is l l the integrity of the fire wall. No fires occurred during this tire ceriod. and no i

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C TOLEDO EDISON COMPANY DAVIS-BESSE NUCLEAR POWER STATION UNIT ONE SUPPLEME'1TAL INFORMATION FOR LER NP-33-78-137 DATE OF EVENT: November 24, 1978 FACILITY: Davis-Besse Unit 1 IDENTIFICATION OF OCCURRENCE: Failure of procedure to state a technical specifica-tion requirement The unit was in Mode 1, with Power (MWT) = 2772, Conditions Prior to Occurrence:

and Load (Gross Mile) = 930, 1

( 1escription of Occurrence: On November 24, 1978, it was discovered that during the implementation of Facility Change Request (FCR)78-083, which was the installation of the new security system, that the procedure did not state the requirements of Tech-nical Specification 3.7.10, which states:

"All penetration fire barriers protecting safety related areas shall be functional at all times. When one or more of the above required pene-tration fire barriers are non-functional, establish a continuous fire watch on at least one side of the affected penetration within one hour".

This resulted in a fire Construction personnel were not aware of this requirement.

watch not being stationed when a six inch penetration (hole) reduced the integrity of the fire wall of Room 428, the low voltage switchgear room which supplies plant The hole remained unblocked from November 17 to November 21, 1978.

essential loads.

This occurrence is being reported under administrative centrols 6.9.1.9(c).

• - Designation of Apparent Cause of Occurrence: The maintenance instructions of FCR 78-083, used by construction personnel, f ailed to state the requirements of Techni-cal Specification 3.7.10.

There was no danger to the health and safety of the public Analysis of Occurrence: No fires occurred during this time period, and no hot work or to unit personnel.

The fire barrier af fected only provides protection for one of two of was performed.

the separate essential busses.

Corrective Adtion: A maintenance instruction, MI-M-87, for core drilling was prepared to assure Technical. Specification requirements are met whenever core drilling is perfor:ed in the future.

Failure Data: There have been no previously reported similar occurrences.

LER #78-117