ML20084T887

LER BFRO-50-259/7617:on 760922,heatup Rate of 100 Degrees Per Hour Exceeded While Bringing Reactor to Rated Pressure & Temp.No Cause Stated

ML20084T887
Person / Time
Site:	Browns Ferry
Issue date:	09/30/1976
From:	Fox H TENNESSEE VALLEY AUTHORITY
To:	Moseley N NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20084T892	List: ML20084T887 ML20084T893
References
LER-BFRO-50-259-761, NUDOCS 8306240247
Download: ML20084T887 (3)

Text

.

. LICENSEE EVENT REPORT l l l l LEA".E PR1 hit ALL REQUIRED INFORMATION)

CONTROL BLOCK:l l 1 6 TYPE AME UCENSE NUMBER o1 l AlL lB lR lF l114l l0 l0 l-l0 l 0 l 0 l 0 l 0 l-l 0.l 025l l 4 l 1 l1 l1 l1 l lOl1l 26 30 31 32 7 89 15 EVENT OATE RE OATE CATECORY TvYE 5J OCCKET AUV8ER O 1 CGNT l l l lTl lL l [0 l5 j0 l-l Ol 215 l968l l0 69 l9 l2 l217 l674l l 75 l l l l l 80 l

7 8 57 58 59 60 61 EVENT DESC;tPTION While bringing the reactor to rated pressure and temperature, the heatup l gl 80 7 89 l

' rate of 100 degrees per hour as specified in Technical Specification 3.6.A.1 7 39 l 80 l

ll l was exceeded.' (BFRC-50-259/761% 80 7 89 l

@l 7 89 83 I

@l 7 89 pp:ve 60

$ R MA t U R VOLATON dEE COMPONENT CODE

@ lC l A l W CODE lV l E I SI Sl ElL l lN l lBl0l1l5l47 44 -

l,][]

48 12 17 43 7 89 10 11 CAUSE DESCR'PTION l

3 l See attachment. 80 7 89 l

@l 7 89 83 l

bl 7 89 O SCO ERY OfSCOVERV OESCRPTON

TA s  % FOWER OTHER STATUS lOlOl1l l NA l Al l Routine startup surveillance l h

7 8 9 b ,

10 12 13 44 l

45 46 80 LOCATON OF F.ELEASE A LE SED CF LEASE AMOUNT OF ACTMTV I

B 7 8 LzJ 9

LZJ 10 l ta 11 l

44 I

45 ta 80 FERSONNEL EXPOSURES NUMBER TYPE DESCA.PfiON l

DE lO (O lOl l zl l ?M 60 7 89 11 12 13 V.

PERSONNEL INJUA.ES .

PauMetR CESCR F TON l

DE I lo lo l I ra 7 89 11 12 OFFSITE CONSECUENCES l

8l 7 89 NA 1

LOSS CR OAMACE TO FACILITY 8306240247 760930 Tvrt DEsCmPTON PDR ADOCK 05000259 .

j S PDR Qyl NA 7 89 10 DUBLICITY

! f bl 7 69 IE so 1 l

ADDITIONAL FACTCPS l

@l

'l US See attachment. 60 6

7 89 w -

~

O Q. "

ATTACIDENT CAUSE DESCRIPTION ,

As control rods were being pulled and bypass valves were opening, the operator noticed the pressure was reaching a point where the condensate booster pumps could not supply water to the vessel. The reactor pressure was not high enough to get reactor feed pump in service. The operator increased the pressure regulator setpoint to reduce the steam flow and maintain proper water level.

This resulted in a heatup rate that exceeded the technical specifications value of 100 F/ hour.

ADDITIONAL FACTORS ine Technical Specifications and Operating Instructions associated with reactor heatup will be reviewed by all licensed personnel.

An analysis will be performed and vesselusage not considered in the original design will be added 1,o I,he cumulative usage for the vessel.

e o

e e

= w s v *- o o e-- , e w -w , en ,v-m y w w '-- ,-v, ,

. y o

- =

,.. ; - .wJ 9

otuncm a- TENNESSEE VALLEY AUTHORITY 5

g $ CHATTANOOGA. TENNCSSEE 374ot t> #e 4 5

%e n,s g Qjgg C septo:.tber 30, 1976

$ DCT 5 1976 4 MMWu7 esiksens 2

Cb Mr. lior an C. Monoloy, Director U.S. I?nclear Ec3nlatory Corsiasion 4 6 Offico of Inapection and Enforcenent N 1 Region II 230 Feachtree Street, IM., 8th Floor

'ta, Georcia 30303 Doe Mr. Moseley:

T.CEIESSEE VALLEY AUDIORITY - BRtNH3 FERRY ITUCLEAR FIAITf UNIT 1 -

DOCKET 110 50-253/ - FACILTW n%ATIIU LICEIi3E DPR REPORTABLE OCCURREiCE REPORT Ba M -25)/7blD Tho enclosed report is to provido de' tails concerning the heatup rate of 100 decrees por hour as specified in the technical speci-fications that was exceeded while bringing the reactor to rated prosauro and toaporature. Ulia report is sui.:itted in accordance with Hro.ma Furry Technical Grecifications section 6. itlia event occurred on Browns Ferry Ifuelcar Plant unit 1.

j Very truly yours, TEIRESEE VALLEY AUDICRITY I

I I

H. 8. Fox Director of Power Production Enclosure (3) i CC(Enclosure):

Director (3)

Offico of Manag acnt Infomation and FrogInn Control

! U.S. Huclear P ;ulatory Coanission Washington, D.C . 20555 d Director _(ho)k Offico of Innpoetion and Enforcoaont U.S. Iluclear Regulatory Couraission Washington, D.C. 20555 1 10114 I

copy SENT REGION

{ An Equal Opportuoity Employer I 1 i

_ _ . _ _ _ _ _ _ _ _ _ . . _ _ _ _