05000260/LER-1979-012-03, /03L-0 on 790528:during post-refueling Startup Testing of RCIC Turbine, Electronic Overspeed Device Could Not Be Reset.Caused by Failure of Electronic Overspeed Device,Airpax Model FSS 406.Overspeed Device Replaced

/03L-0 on 790528:during post-refueling Startup Testing of RCIC Turbine, Electronic Overspeed Device Could Not Be Reset.Caused by Failure of Electronic Overspeed Device,Airpax Model FSS 406.Overspeed Device Replaced

ML18024A864
Person / Time
Site:	Browns Ferry
Issue date:	06/26/1979
From:	TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML18024A863	List: 05000260/LER-1979-012, Forwards LER 79-012/03L-0 05000260/LER-1979-012-03, /03L-0 on 790528:during post-refueling Startup Testing of RCIC Turbine, Electronic Overspeed Device Could Not Be Reset.Caused by Failure of Electronic Overspeed Device,Airpax Model FSS 406.Overspeed Device Replaced
References
LER-79-012-03L, LER-79-12-3L, NUDOCS 7906290152
Download: ML18024A864 (4)

LER-1979-012, /03L-0 on 790528:during post-refueling Startup Testing of RCIC Turbine, Electronic Overspeed Device Could Not Be Reset.Caused by Failure of Electronic Overspeed Device,Airpax Model FSS 406.Overspeed Device Replaced

Event date:
Report date:
2601979012R03 - NRC Website

text

FORM 366 7.77 I LICENSEE EVENT R E PORT U. S.

EAR REGULATORYCOMMISSION

~01 7

8 CON'T

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8 CONTROL BLOCK:

QI IlPLEASE PRINT OR TYPE ALLREQUIRED INFORMATION)

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LICENSEE CODE 14 LICENSE NUMBER 25 26 LICENSE TYPE 30 57 CAT 58

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OB SOURCE 60 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DFSCRIPTION AND PROBABLE CONSEQUENCES OIO While conducting post refueling startup testing of the RCIC turbine, the electronic overspeed device could not be reset.

Operability of the RCIC system, as required by T,

ST 3 ~ 5 ~F.l, was not proven.

Redundant operable systems:

HPCI.

There was no haz-ard to the public health or safety.

Previous occurrence:

None.

~OB

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8 SYSTEM

CAUSE

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VALVE CODE CODE SUBCODE COMPONENT CODE SUBCOOE SUBCODE

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10 11 12 13 18 19 20 SEOUENTIAL OCCURRENCE REPORT REVISION LERIRO EVENT YEAR REPORT NO.

CODE TYPE NO.

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+0 21 22 23 24 26 27 28 29 30 31 32 ACTION FUTURE EFFECT SHUTDOWN Q

ATTACHMENT NPRDQ PRIME COMP.

COMPONENT TAKEN ACTION ON PLANT METHOD HOURS

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SUPPLIER MANUFACTURER

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.,CAUSE DESCRIPTION AND CORRECTIVE ACTIONS Q27 o

Failure of the RCIC turbine electronic overs eed device Air ax Model FSS 406.

U on installation of a replacement overspeed

device, the RCIC turbine w'as satisfactoril 2

tested and returned to service.

The failure was random and no recurrence control 3

action is required.

4 7

8 9

FAG I0TY STATUS IIPOWER OTHER STATUS Q

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Q29 NA 7

8 9

10 12 13 44 ACTIVITY CONTENT REI.EASED OF RELEASE AMOUNTOF ACTIVITYQ

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10 11 44 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION Q39

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11 12 13 PERSONNEL INJURIES NUMBER 'ESCRIPTIONO41 00 Q49 NA 9

11 12 LOSS OF OR DAMAGETo FACILITYQ43 TYPE

DESCRIPTION

Z Q42 NA 9

10 PUBLICITY ISSUED DESCRIPTION ~B

~NQ44 NA 9

10 METHOD OF DISCOVERY DISCOVERY DESCRIPTION

+32

~B Q31 Post Refueling Startup Testing 45 LOCATIONOF RELEASE 036 NA 45 80 80 80 80 7

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NAME OF PREPARER V906S90 /94 PHONE:

68 69 80 80 NRC USE ONI.Y 45 ER 80 45 0

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Form BF-17 BF 15.2 6/09/78 LER SUPPLEMENTAL INFORMATION BFRO 260 /

7912 Technical Specification Involved

> 5.F l Reported Under Technical Specification 6

7 2 b 2 Date of Occurrence

>/28/79 Time of Occurrence o330 Unit Identification and Descri tion of Occurrence:

While performing post refueling startup testing of the RCIC turbine, the electronic overspeed device could not be reset.

Conditions Prior to Occurrence:

Post refueling startup testing.

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

Describe.

HPCL system demonstrated operable.

A arent Cause of Occurrence:

Failure of the RCIC turbine electronic overspeed device.

Anal sis of Occurrence:

There was no hazard to the public health or safety.

Corrective Action

The electronic overspeed device was replaced and the RCIC system returned to operation.

Failure Data:

None previous.

Tennessee Valley Authority - Browns Ferry Nuclear Plant