ML18283B476

Abnormal Occurrence Report BFRO-50-296/767 Rupture Disk Located on the Steam Discharge Line That Ruptured During a Startup Test Run on the Unit 3 HPCI Turbine

ML18283B476
Person / Time
Site:	Browns Ferry
Issue date:	09/22/1976
From:	Fox H Tennessee Valley Authority
To:	Moseley N NRC/IE, NRC/RGN-II
References
LER 1976-007-03
Download: ML18283B476 (10)

Text

NllC p 7ifl 'lll6 U.OI.NUCLEAfl AEOULATOflYCOMM'"SION DOCKET NUMOEfl l2-7OI j So->st f:ILC NUMOEB NRC~DISTRIDUTION Foll PART 60 DOCI(ET MATERIAL INCIDENT REPORT TO: MR.R C MOSELEY FROM: TVA OATC OF OOCUMFNT CHATTANOOGA'ENN.. l-X>- l4 HS H)X OATC AECCIVEO 9-x1" l4 LCTTEB ONOTOAIZEO PAOP INPUT FOAM NUM0L fl OF COPIES flECE I V F 0 OOAIOINAL +NC LASSIF IE 0

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HOnC KI a~a OESCBIPTION ENCLOSU BF LTR TRANS THE POLIDWING........ LXCENSEE EVENT REPORT 50-296/767 ON 8 2II.>>76 REF DURING STARTUP TEST ON UNIT $ 3 RUPTURE DISK LOCATED ON THE STEAM DISCHARGE LINE RUPTURED ACKN0%LED'HD gpss~

DO NOT REMOVE R(Lowers PLANT NAML" NOTE: IP PERSONNEL EXPOSURE IS INVOLVED SEND DIRECTLY TO KREGER/J..COLLINS ACTION/INFORMATION RANCH CHIEF:

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TENNESSEE VALLEY AUTHO . Y eW/a j)

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u.S. NVCNAR MCU;AjORY September .22,'.Pg CO<<ju EE le MGjl SSCtloE g

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Nr. Gorman C. Moscley, Director ~

U,S. Ifuclcar RegQatory Comniss9.on Office of Xnsoection and, ZnCorcment SEPgyQ@s Re+on XX g g ~Q gfjQLRATO~

230 Peachtx'ee Street> Rt.~ 8th Z1oo>

Atlanta j Geor Q a, 3 03 03 Deax 5h'. Noseley:

HKKSBEH VALLEY AUKOBXTE>> 3EO'i'QQ XHRHXKELHARPXAHT QHXT 3-DOKHMA If0. 50 2/6 -, PACXLEYS OPZRA2+Yv XXClRBL'PR REPORTAKZ>>

OCCUBKufCS RCPT. 3PBO-50"W/767 The enclosed jreyorb is to provide details concexnlug the ruoture dish located on thc sterna discharge line that ruotured dustup a starts test run on the uxd.t 3 HPCX turbine. Sd.s report is submitted.

in accordance xrlth Rvotms Perry Techaica1 Specifications Section 6.

5his e~t occurred on 3rcems Zerry Ifuclcar X'lant unit 3.

Vary tnt yours, I

TREES~ VAXZZX ALRKORXKY H. Si Pox Director of Potter Production Enclosure (3)

CC (Enclosure): .

Director (3)

Office of lhnagement Xnfo~tion and Progrm Control U.S. nuclear RepQatory Ccemaission Uashfin&on~ D,C.. 20555 A

Office of Xnspcction and Znforcenant U.S. nuclear Re+ulatory Cmxd.ssion

$ fas~on, D.C. 20555

'n Equal Opportunity Employer

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~ 1 6 rY LYJ EtRXEE LICENSE EVENT tdAME LCENSE NURSER TYPE TYPE L B R ~IF 3 0 0 0 0 0 0 0 0 0 4 1 14,1

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8 9 25 26 30 31 32 REPORT REPO4T CATEGORY TYPE SOUIICE DOCKET NUMSER EVENT DATE REPORT DATE

~o~ CCN'T L ~L 0 5 0 0 2 ~os z d y 8 57 58 59 60 61 ~ 6B 69 74 75 80 EVENT DESCRIPTION ggB.S I Outing a startup test 'run on the unit 3.HFCl turbine, the rupture disk located on the 60 03 steam discharge line ruptured. High exhaust pressure turbine trips occurred on 7 09 T~ ',

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'~04 subsequent runs. BFRO-50-296/767.

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7 8 9 7 89 PRME e ~ BO SYSTEhI CAUSE COMP03IENT CC!APO'I94T CODE COOL COMPONENT CODE SU~>> MAtIUFACTUturR VCLATON

~cr ~cJ F x z xl xl x x X 9'9 9 N 7 8 9 10 11 12 17 43 44 47 48 CAUSE DESCRIPTION

'I)Qo A swing/check and/or a stop check valve in the exhaust line were binding which caused 7 8 9

~o 9 Qa pressure buildup in the exhaust line.

7 09 7 89 ~

FACILITY METHOD OF SO STATUS Xi POWER OTHER STATUS OLSCOVERY DISCOVERY OESCR PTION EH. ~B ~oo 3 NA B Control Room Annunciation 7 8 9 10 12 13 44 45 46 ao FORL1 OF ACTIVITY CONTENT RLLEASEO OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE NA 7 8 9 10 11 44 45 BC PERSONNEL EXPOSURES

~3 I~CO' ~Z NA 7 69 11 12 13 EC

~ PERSONNEL INJURIES NUMBER DESCRIPTION NA 7 0 9 11 12 Bi OPFSITF CONSEQUENCES 7 09 LOSS OR DAMAGE TO FACILITY DESCRIPTION

)s ~z NA 09 10 PUQLICITY

[ll/) NA 7 89 ADDITIONAL FACTORS Q1uol Thr Hfol vss run satisfactorily after repair of valves ~

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~o~oTloy O m TENNESSEE VALLEY AUTHORITY CHATTANOOGA. TENNESSEE 3'7401 b.

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September'2, 1976 Mr. Norman C. Moseley, Director U.S. Nuclear Regulatory Commission Office of Inspection and. Enforcement Region II 230 Peachtree Street, NW., 8th Floor Atlanta, Georgia 30303

Dear Mr. Moseley:

TENNESSEE VALLEY AUTHORITY

- BROWNS FERRY NUCLEAR PIANT UNIT 3-DOCKET NO. 50-296 FACILITY OPERATING LICENSE DPR-68 - REPORTABLE OCCURRENCE REPORT BFRO-50-296/767 The enclosed report is to provide details concerning the rupture disk located on the steam discharge line that ruptured during a startup test run on the unit 3 HPCI turbine. This report is submitted in accordance with Browns Ferry Technical Specifications Section 6.

This event occurred. on Browns Ferry Nuclear Plant unit 3.

Very truly yours, TENNESSEE VALLEY AUTHORITY S. Fox Director of Power Production Enclosure (3)

CC (Enclosure):

Director (3)

Office of Management Information and Program Control U.S. Nuclear Regulatory Commission Washington, D.C. 20555 Director (IlO)

Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C. 20555 An Equal Opportunity Employer

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~ 1 6 LICEttSEE as~~ LtCENSE EVENT tdhtAE LICFNSE NUtJ!UER TYPE 01 A L B R F 3 0 0 0 0 0 ol0 0 0 7 89 14 15 25 26 30 31 32 REPORT REPOt2T CATEGORY TYPE SOURCE DOCKET NUMOER EVEttT DATE REPORT DATE

[oO]ton' 0 5 0 0 2 ~08 2 4 7 6 8 57 58 59 60 61 68 69 74 75 80 EYENT OESCRIPTION IonsI I During a startup test 'run on the unit 3 HPCl turbine, the rupture dish located on ths 7 89

[QQ3). steam discharge line ruptured. High exhaust pressure turbine trips occurred on 7 0 9 60

~0 4 subsequent runs. BFRO-50-296/767.

7 8 9 80 Qog 89 Jog 7 89 PRME ~ ~ eo SYSTEM CAUS'E COBd PQhgENT CQ!APCNEtdT CODE CODE COMPONENT CODE SUPP'& hlhtIUFACTUr~

[0D~j ~CJ F X X I X I XI 2 X X 9 I 9 9 7 8 9 10 11 12 17 43 48 I

CAUSE QESCRIPTION l00' swing/check and/or a stop check valve in the exhaust line were binding which caused 7 8 9 I

a pressure buildup in tha exhaust line.

7 8 9

%=1 i 7 89 I FACILITY METHOD OF STATUS  % POWER OTL1ER STATUS DISCOVERY OISCOVEfIY OESCR.PTFQN ting . B ~oo 3 NA B Control Room Annunciation 7 8 9 10 12 13 44 45 46 FORtA OF ACTIVITY CONTENT RLLEASEO OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE NA-7 8 9 10 11 44 45 GC PERSONiNEL EXPOSURES

[>is] I~Do z 7 89 11

'I2 13 .Bi PERSONNEL INJURIES NUhIBER DESCRIPTION NA 7 8 9 11 12 OFFSITE CONS EOUEN C ES NA 7 89 BL LOSS OR DAMAGE TQ FACILITY TYPE DESCRIPTION

~z NA 09 10 PUDLICITY NA 8 9 AOO! TIOblAL FACTOPS Qtg Thr 11pcl uas run satisfactorily attar repair ot valves.

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