ML18024A864

LER 79-012/03L-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

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: ML18024A862 ML18024A864
References
LER-79-012-03L, LER-79-12-3L, NUDOCS 7906290152
Download: ML18024A864 (4)

Text

FORM 366 U. S. EAR REGULATORY COMMISSION 7.77 I LICENSEE EV ENT R E PORT CONTROL BLOCK: QI IlPLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

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~01 A L 9 R 9 2 14 QE 0 0 0 0 0 0 LICENSE NUMBER 0 0 0 25 Qo 26 4 1 1 LICENSE TYPE 1 1 30 QR~QE57 CAT 58 7 8 9 LICENSEE CODE CON'T

~L~B 0 5 0 0 0 2 6 0 7 0 5 2 8 7 9 QB 0 6 2 6 7 OB

~O SOURCE 7 8 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.

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~OB 80 7 8 9 SYSTEM CAUSE CAUSE COMP. VALVE

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~QP CODE 10 Qll CODE R

11 QIE SUBCODE

~AQIE 12 SEOUENTIAL 13 1

COMPONENT CODE N 0 2 R 0 OCCURRENCE 18 QI4 SUBCOOE

~ZQIR 19 REPORT

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SUBCODE 20 Qlo REVISION QIT LERIRO REPOIIT EVENT YEAR

~79 + ~01 REPORT NO.

2 +w ~09 CODE

+

TYPE Q 32+0 NO.

21 22 23 24 26 27 28 29 30 31 PRIME COMP. COMPONENT ACTION FUTURE TAKEN ACTION EFFECT ON PLANT SHUTDOWN METHOD HOURS @22Q~ ATTACHMENT SUBMITTED NPRDQ FORM SUB. SUPPLIER l

MANUFACTURER

~AQIB ~ZGB 33 34

~cQzo 35

~ZQ21 36 37 40 Ll0" 41

~02'~JQzs 42 43 44 A

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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 tested and returned to service. The failure was random and no recurrence control 2

3 action is required.

4 7 8 9 80 FAG I 0TY STATUS IIPOWER OTHER STATUS Q METHOD OF DISCOVERY DISCOVERY DESCRIPTION +32 Post Refueling Startup Testing

~l5 ~0 Q29 ~00 1 Q29 NA 44

~B 45 Q31 80 7 8 9 10 12 13 ACTIVITY CONTENT REI.EASED OF RELEASE NA AMOUNT OF ACTIVITY Q NA LOCATION OF RELEASE 036

~Z 033 ~ZQ34 7 8 9 10 11 44 45 80 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION Q39

~00 0 QRT Z Qoo 13 NA 80 7 8 9 11 12 PERSONNEL INJURIES NUMBER 'ESCRIPTIONO41 00 Q49 NA 80 7 8 9 11 12 LOSS OF OR DAMAGE To FACILITY DESCRIPTION Q43 TYPE Z Q42 NA 80 7 8 9 ISSUED 10 PUBLICITY DESCRIPTION ~B V906S90 /94 NRC USE ONI.Y 45 ER o ~NQ44 NA 7 8 9 10 68 69 80 45 0

NAME OF PREPARER PHONE:

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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