05000321/LER-1979-082, Updated LER 79-082/03X-2:on 790825-27,attempt to Perform RCIC Pump Operability Procedure Unsuccessful When Turbine Failed to Trip Upon Manual Signal.Caused by Burned Out Turbine Trip Actuator Coils & Binding Assembly

Updated LER 79-082/03X-2:on 790825-27,attempt to Perform RCIC Pump Operability Procedure Unsuccessful When Turbine Failed to Trip Upon Manual Signal.Caused by Burned Out Turbine Trip Actuator Coils & Binding Assembly

ML20070A747
Person / Time
Site:	Hatch
Issue date:	11/23/1982
From:	Tipps S GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20070A705	List: 05000321/LER-1979-082, Updated LER 79-082/03X-2:on 790825-27,attempt to Perform RCIC Pump Operability Procedure Unsuccessful When Turbine Failed to Trip Upon Manual Signal.Caused by Burned Out Turbine Trip Actuator Coils & Binding Assembly
References
LER-79-082-03X, LER-79-82-3X, NUDOCS 8212090341
Download: ML20070A747 (1)

LER-2079-082, Updated LER 79-082/03X-2:on 790825-27,attempt to Perform RCIC Pump Operability Procedure Unsuccessful When Turbine Failed to Trip Upon Manual Signal.Caused by Burned Out Turbine Trip Actuator Coils & Binding Assembly

Event date:
Report date:
3212079082R00 - NRC Website

text

NRC FORM 366 U. S. NUCLE ATJ RE'; ULATORY COMMISSION (7 7h

• UPDATE REPORT - PREVIOUS

, LICENSEE EVENT REPORT REPORT DATE 11/2/82 CONTROL BLOCK: l l l l l (PLEASE PRINT CR TYPE ALL RELUllED INFC.MATION) 7 o

U 9 l Gl Al El Il Hl 1l@l LICENSEE CODE 14 0

15 l 0 l -l 0 l 0LICENSE l 0 lNUMBER 0 l 0 l -l O l O25 l@l26 4 lLICENSE 1 l l lTYPE1l 1l@l JO l

57 CAT 58 l@

CON'T lOl>l S$Ry

@l0 l5 l0 l0 -l0 l3 12 l1 l@l 0 l 8 l 2 l 5l 7l 9 l@l1 74 l 1 l 2 l 3 l 8 l 280l@

75

'I 8 60 61 DOCKET NUMBER 68 69 EVENT DATE REPORT DATE EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h O 2 lOn August 25, 1979, with Unit 1 at hot standby, an attempt to perform t-h d O 3 l"RCIC PUMP OPERABILITY" procedure was unsuccessful when the turbine l O 4 l failed to trip upon manual signal. On August 27, 1979, the turbine trio 1 I O l s i land throttle valve again failed to respond to a trip signal. The RCIC l O s Isystem was declared inoperable. This event is contrary to T.S.3.5.E.1. Al l0l7]l7-day LCO was initiated as per Tech. Specs. 3.5.3.E.2. The health and I l O ;g i l safety of the public were not affected by this non-repetitive event. I DE CODE SUBC E COMPONENT CODE SUBCOdE SU F 0 9 l Cl El@ [Ej@ [_B_j @ lV l A l L lV l E l X l@ [_Ej@ (_Dj @

7 8 9 10 11 12 13 18 19 20

_ SEQUE NTI AL OCCURRENCE REPORT REVISION LER/RO EVENT YE AR R EPORT NO. CODE TYPE N O.

@ ,R l7l9l l-l l018l2l d l 0l 31 l Xl [ _j [_,2,J

_ 21 22 23 24 26 27 8 a 30 31 32 K N AC ON L T MET HOURS SB IT FOR B. SUPPLI MANUF CTURER l3JA lgl34Bl@ lZl@

36

[_Z_j@

36 l0l0l0l0l 31 40

]@

di lN 42 l@ d@

43 lT 44 l1 l4 l747l@  !

CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h g lThe August 25, 1979, failure was due to burned out turbine trip actuatorI i i l coils. The burned out coils were replaced. The system was satisfactorily I

, , l tested and returned to service. The August 27, 1979, failure was caused I

, ., lby binding in the spring cylinder assembly. The spring cylinder assembly l

, , lwas replaced and the valve tested satisfactorily and returned to servicd 7 8 9 80 ST S  % POWER OTHER STATUS ISC RY DISCOVERY OESCRIPTION i 5 (G_j @ l0l0l0l@l NA l l3J@l Surveillance Test l A TIVITY CO TENT RELEASED OF RELEASE LOCATION OF RELE ASE i o Lz_1@ ' LtJ@l AMOUNT NA OF "

ACTIVITY I n^ @I **

l PEnSO~NE1 ExPOSSES NUM En TvPE DESCRIPTION @

i 7 l0 l0 10 l@[zj@l NA l

' PERSO~NEL l~;ULS NUMeER otSCniPriO~@

I ITT 81910 l0 l0 l@l12 F 11 NA ,

80 LOSS OF OR DAMAGE TO FACILITY h TYPE DESCRIPTION v i o lz_j@l NA 1

' 8 ' ' 8212090341 821123 80 PDR ADOCK 05 COO 321 NRC USE ONLY ,

S PDR llll[llllllllj F

2 o 8 9 ISSUE @DESCRtPTION @

l 10 NA l 68 69 80 g NAME OF PREPARER S. B. TiDDs PHONE: I9I2I M 7-7R5l