ML20040E258

LER 81-037/03L-0:on 811227,while Attempting to Start RHRSW Pump P-8-1A,breaker Tripped Contrary to Tech Specs.Caused by Worn Bushings on Operating Mechanism.Circuit Breaker Replaced.Breaker Mfg by Ge,Model Am 4.16 250-8HB

ML20040E258
Person / Time
Site:	Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date:	01/26/1982
From:	Murphy W VERMONT YANKEE NUCLEAR POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20040E255	List: ML20040E254 ML20040E258
References
LER-81-037-03L, LER-81-37-3L, NUDOCS 8202040082
Download: ML20040E258 (1)

Text

Erc:

(7 77)

M 366 U. S. NUCLEAR REGULATCY COMMISSION LICENSEE EVENT REPORT LER 81-37/3L CONTROL BLOCK: l I

l l l l l lh 6

(PLEASE PRINT OR TYPE ALL REQUIRED INFORMATIONI Io Iil8 I9 vl Tl 7

vi YiS l 1 l@l 0 l 01 -101010I LICENSEE CODE 14 15 LICENSE NUMBER al 0l _l 0l Ol@l 41 25 26 il il il 1]@l 57 GAl T 68l@

LICENSE TYPE 40 CON'T lol1l S[,CE l L@l 0 l 5 l 0 l 0 l 0 l 217 l 1 @l 1l 212 l 7l 8I 1l@l0 l1 l 2 l 6 l 8 l 280l@

7 8 60 61 DOCKET NUM8 ER 68 69 EVENT DATE 74 75 REPORT DATE EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h ITl 21 l While attempting to start the RHRSW pump P-8-1A the breaker trioned contrarv en I i o i 31 l T.S. 3.5.C.2. All other components of the RHRSW were determined to be onernblo- I l o 14 I [The circuit breaker was replaced and the system tested satisf actorilv Rn cod . - I lo isi l the above, there were no adverse consequences to the public health nnd s n f o h- A I lo l6 l l similar event was reported as LER 81-15 '3L I lo l7] l l 10181l  !

80 CE CODE S BC E COMPONENT CODE S 8C00E SU E lo191 7 8 l Cl F] h l El h j h l ClIJ Kl Tl Bl Rl Kl h lA l h d h 9 10 11 12 18 19 20 SEQUENTI AL OCCL:RRENCE REPORT REVISION LER EVENT YE AR REPORT NO. CODE TYPE N O.

a

@ sy,RO g I 81 11

,,_ 21 22 l-l 23 l 01 31 7 l 24 26 I/]

27 I 01 31 28 29

[30 t.] [.-j 31 W32 T K N A ON ON PL NT ME HOURS S8 i FOR 8. SUPPLI E MANUFACTURER W @lZl@ lZl@ lJ6Z l@ l0l0l0l0l lNl@ lY l@ l A lh l44G l 0 l 8 l470lh 33 34 J5 37 40 41 42 43 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h ji jo;lThis event was caused by worn bushings on the operating mechanism causine rho I li ;i j l breaker to trip. The breaker was manufactured by G.E. model W 6 1A "n_ mm l l

g The corrective action was to replace the circuit breaker and demonstrate i r

l ,,,3, satisfactory operation of the RHRSW pump. An evaluation of this event is in progress l 1 i I41 I to determine the need for additional corrective action. l 7 d 9 80 STA $  % POWER OTHER STATUS DIS O RY DISCOVERY DESCRIPTION Fig lG l@ l 0l 0[ 0l@l NA l l A l@l operator observation l ACTIVITY CONTENT aELE ASe0 cF RELE ASE AMOUNT OF ACTIVITY LOCATION OF RELEASE 11 16 8 9 l ] @ l 2]gl NA l l 45 NA l 7 10 11 44 80 PERSONNEL FXPOSURES NUMBER TYPE DESCRIPTION y l0 l 0 l 0 l@l Z l@l NA l 80 PERSONNE L INJU IES NuMsER meSCRipricN @

11 la3 l9 l 0l 0l OJ@l12 NA l 7 11 83 LOSS OF CA DAVACF TO F ACIL!Ty (

TvPE CESCRIPTION NA l2191 d @l 8 PuBJTY O202040002 820126 NRC USE ONLY iS O PDR ADOCK 05000271 .

12101 lggaIh] ESCRIPTICN NA hS PDR } l1 !ljlll ll !![]

7 8 3 to 6S 69 30 3 NAME OF PREPARER W. P. Murphy pHCNE: 802-257-7711 2

. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ - _ _ _ _ _