05000296/LER-1979-013-03, /03L-0:on 790816,carbon Dioxide Pilot Valve Line Was Cut.Caused by Drawing Error in Which Embedded Pipe Did Not Appear.Damaged Pipe Repaired.Drawing Will Be Corrected

/03L-0:on 790816,carbon Dioxide Pilot Valve Line Was Cut.Caused by Drawing Error in Which Embedded Pipe Did Not Appear.Damaged Pipe Repaired.Drawing Will Be Corrected

ML18024B011
Person / Time
Site:	Browns Ferry
Issue date:	09/14/1979
From:	TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML18024B010	List: 05000296/LER-1979-013, Forwards LER 79-013/03L-0 05000296/LER-1979-013-03, /03L-0:on 790816,carbon Dioxide Pilot Valve Line Was Cut.Caused by Drawing Error in Which Embedded Pipe Did Not Appear.Damaged Pipe Repaired.Drawing Will Be Corrected
References
LER-79-013-03L-01, LER-79-13-3L-1, NUDOCS 7909190403
Download: ML18024B011 (4)

LER-1979-013, /03L-0:on 790816,carbon Dioxide Pilot Valve Line Was Cut.Caused by Drawing Error in Which Embedded Pipe Did Not Appear.Damaged Pipe Repaired.Drawing Will Be Corrected

Event date:
Report date:
2961979013R03 - NRC Website

text

INHC FORM 366 I7 77)

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S. NUCLEAR REGULATORY COMMISSION t

LICENSEE EVENT REPORT

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9 LICENSEE CODE 14 '6 IPLEASE PRINT OR TYPE ALLREQUIRED INFORMATIONI 0

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7 9 0 60 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABI.E CONSEQUENCES QIO Durin normal o eration while core drillin in the U-3 diesel enerator building the carbon dio'xide pilot valve line for FCV-39-36 and FCV-39-27 was cut.

The carbon diox-s

~O4 ide system for board rooms 3EA and 3EB was made inoperable T.

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There was no hazard to the public health or safety.

There have been no previous occurrences.

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There are no redundant systems.

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COMPONENT TAKEN ACTION ON PLANT METHOD HOURS +22 SUBMITTED FORM SUB.

SUPPLIER MANUFACTURER

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~026 026 33 34 35 36 37 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS 027 o

The embedded i in drawin was in error.

The embedded pipe did not appear on the drawin The safet en ineer was notified and a fire watch establihhed while the s s-tern was inoperable.

The damaged pipe was repaired.

The drawing will be corrected to 3

prevent recurrence.

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9 FACILITY STATUS

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10 12 13 44 ACTIVITY CONTENT RELEASED OF RELEASE AMOUNTOF ACTIVITYQ 033

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11 12 13 PER SO NNE L INJURIES NUMBER DESCRIPTION041 s

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11 12 LOSS OF OR DAMAGE TO FACILITYQ43 TYPE

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10 PUBLICITY ISSUED DESCRIPTIONQ NQ NA 7

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NAME OF PREPARERN 80 80 80 80 80 PHONE 68 69 80 NRC USE ONLY o

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METHOD OF DISCOVERY DISCOVERY DESCRIPTION Q32

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'I'enncssee Valley Authority Brnivns Ferry Nuclear Plant

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k LER SUPPLEMFNTAL INFORYiAr ION Form BF-17 BF 15. 2 1/10/79 BFRO-.50-296 /

7913 Technical Specification Involved 3.11.B.1 Reported Under Tcchnical Specification 6

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Date of Occurrence g/16/79 Time of Occurrence 10:0<<m Unit Identification and Descri tion'of Occurrence:

During a core drilling operation in the U-3 diesel generator building a carbon dioxide line was cut.

Conditions Prior to Occurrence:

. Normal operation.

Action specified in the Technical Specificaticn Surveillance Requirements met due to ino erable e ui ment.

Describe.

A fire watch was established until repairs were made.

~Aarent Cause of Occurrence:

Drawing Error.

The responsible engineer searched the general embedded piping drawings.

The pipe involved does not'ppear on the drawing in the location drilled.

Corrective Action

Repaired the damaged line.

The drawing will be corrected.

Failure Data:

None

+Retention:

• Revision:

eriod - Lifetime; Responsibility

- Administrative Supervisor

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