ML19261B488

LER 79-005/03L-0 on 790129:during Operation,Flow Transmitter Output Was Found Pegged High & Was Bypassed.Caused by Packing Leak in Transmitter Equalizing & Reference Leg Isolation Valves

ML19261B488
Person / Time
Site:	Calvert Cliffs
Issue date:	02/22/1979
From:	Carroll J, Miernicki M BALTIMORE GAS & ELECTRIC CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19261B486	List: ML19261B485 ML19261B488
References
LER-79-005-03L, LER-79-5-3L, NUDOCS 7902260339
Download: ML19261B488 (2)

Text

....w-.. an v6 n m nasium LICENSEE EVENT REPORT h .

CONTROL BLOCK: l 1

l l l l l 6

lh (PLE ASE PRINT OR TYPE ALL REQUIRED INFORMATION) lo lil8 l9 Ml Dl Cl Cl Nl 2lgl 0[ 0l -l 0l 0l 0 0l 0l - 0l0l@l4 1l1l1l1lgl l lg 7 LICENSEE CODE 14 15 LICENSE NUMBER 26 26 LICENSE TYPE JD 57 CAT $8 CON'T I0lil 7 8 3$s%60l Ll@l0 61

[5 l0 DOCKET l0 l0NUMBER l3 l1 l8 lG)l 66 0 69] 1 l EVENT 2 l 9DATE l 7 l 9 l@l 74 07b l 2 REP l 20HTl 21 DATE 7 l 980l@

EVENT DESCRIPTION AND PROBA8t.E CONSEQUENCES h

, O 2 l During nonnal operation RPS Channel D flow transmitte output was found l o 3 l pegged high and was bypassed at 0855. Per requirements of T.S. 3.3.1.1, I i io 14 l l Channel D flow trip unit was placed in tripped condition at 0755 on 1/31/79.

IoIsl Corrective action was completed and the channel returned to service at 0900 l loisll on 1/31/79. Three redundant flow channels remained operable throughout the gol7ll event. This is not a repetitive occurrence. l 0 8 l  !

t 7 8 9 80 C DE SUSC E g hEg CO S BC E COMPONENT CODE SU o 9 lI l A @ @@ l El@ lIlNl S TlR p lg 7 8 9 10 11 12 13 18 19 20 SEQUENTIAL OCCUR R E NCE REPORT RE VISION LER EVENT YE AR REPORT NO. CODE TYPE NO.

O ,ag/RO l7l9l 22

[--J 23 24 0l 0l 5l y l0l3l M M LLj 30 ,

[--J [0j i

_ 21 26 27 31 32 KEN AC ON ON PLANT MET HOURS 22 SB I FOR B. SUP IER MA UA RE 33 34 35 36 37 40 41 42 43 44 47 CAUSE DESCRi' TION AND CORRECTIVE ACTIONS 27 i O Discovered that the transmitter's equalizino and reference leg isolation i i l valves had packing leaks. The packing leaks caused flow in these lines l

, 7 l resulting in high temperatures which warped the transmitter bellows. The l i 3 l packing of the two isolation valves was adjusted which stopped the leakage, i' 3 3 ig L ransmitter T 2-PDT-111D was replaced, calibrated, and returned to service. (CONT) I' 7 8 9 sto ST  % POWER OTHER STATUS DIS OV R DISCOVERY DESCRIPTION i s J@ l 0l 9l .8l@l NA l W gl Troubleshooting equipment l A TIVITY CO TENT RELEASED OF RELEASE AMOUNT OF ACTIVITY . LOCATION OF RELEASE It 16 l d @ ggl NA l NA l PERSONNEL EXPOS ES NUMBER TYPE DESCRIPTION 1 7 l 0l 0l0l@ ] @l NA l PERSONNE L INJURIES NUMBER DESCRIPTION i a l 0l 0l0lgl NA l 7 8 9 11 12 80 LOSS OF OR DAMAGE TO FACILITY TYPE DESCRIPTION 1 9 NA 8 9

@l10 7 80 PUBLICITY NRC USE ONLY 2 o '*]* @f'*"'"' " NA 7902260339 i u i iiiiiiiilj 7 8 9 to 68 69 80 s NAME OF PREPARER PHONE:

LER 79/05/3L DOCKET No. 50-318 EVFNT DATE 01/29/79 REPORT DATE 02/22/79 ATTACHMENT CAUSE DESCRIPTION AND CORRECTIVE ACTIONS (CONTINUED):

No further corrective action is necessary.

.