ML20062B139

Forwards Rev to Design Assessment Rept

ML20062B139
Person / Time
Site:	LaSalle
Issue date:	10/16/1978
From:	Reed C COMMONWEALTH EDISON CO.
To:	Parr O Office of Nuclear Reactor Regulation
Shared Package
ML20062B143	List: ML20062B139 ML20062B186
References
NUDOCS 7810230181
Download: ML20062B139 (1)

Text

. . .

COpiT90L BLOCK: l 1

l l l l l 6

lh IPLEASE PRINT.OR TYPE ALL REQUIRED INFORMATION)

M' lN8 9lC lBLICENSEE lE lPCODE l2 l@l0 l 0 l -l 0 l 0 lLtCENSE 14 15 0 l 0NUM8tRl 0 l - l 0 l 0 l@l 25 26 4 l 1LICENSEl 1 lTYPEl l 1JO lh!57 LAT l

58 l@

CON'T IOlll 7 8 sO[RC 60 ILGLo15 DOCK GI l0 l-ET NUMBER 10 13 12 68l4 l@l0 63 l9 10 h 17 18 l@lllOl0I4l7lR EVENT DATE 74 75 REPORT DATE 80 l@

EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h lo l2l l RCI_C isolation channel "A" tripped momentarily causine the RCTC wstem en ho l l O 13 l l inoperative. A control room annunciator indicated the trip was caused by a steam l l o 14 l l leak detector signal. (Technical Specification 3.7.4) l 10151l l I o is l l l 10171I l 0181 l l

, 8 9 80 SYSTEM CAUSE CAUSE COMP. VALVE N CODE CODE SUSCODE COMPONENT CODE SUSCODE SUSCODE a

s l Cl El@ Wh l A lh lR l El Ll Al Yl Xl h W h [2_l h 9 10 11 12 13 18 13 20 SEQUENTIAL OCCURRENCE REPORT REVISION LE R/Ro EVENT YEAR REPORT NO. CODE TYPE N O.

h Rtggu

,,, l217 22l8 l l-l 2J l0 l5 l9 l 24 26 Z

27 l0 l3 l 28 29 lLl 30 l-l 31 lo l 32 KN AC ON ON PL NT ME HOURS S8 IT FOR b B. SUPPLIE MANLFA T cA lCl@ d @

33 34 lZl@

35 l36Z l@ 31l0 l0 l0 l0 40l l Nlh 41 l42 Yl@ dh l Pl ?! 9l 7lh 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS 1110 l l The RCIC system was reset and onerable within six minutes af*.:r the isolation l

[ijil l occurred. A defective RX-2 relay caused the false isolation and uns ronincod. TW l i,i7; l 1s considered an isolated incident and no further corrective action is roauired. l u_L4_j i I F 8 9 80 ST S  % POWER OTHER STATUS 015 O RY DISCOVERY DESCRIPTION NA l1 l 5 l Wh l1 l 0 l 0 l@l l lB l@lODeratorobservation l A TlVITY CO TENT RELE ASED OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE l1 l6 l 1 8 9

@ ]@l to 11 NA 44 l l NA 45 80 l

PEH50NNEL EXPOSURES NUMBER TYPE DESCRIPTION 1 7 l0l0l0l@lZl@l ' ' '

NA l

' PERSONNEt,'INJU IES

• NUM8ER DESCRIPTION l 1 l H l l 0 l 0 l 0 l@l NA l 7 8 9 11 12 80 LOSS TYPE OF OR DAMAGE DESCRIPTION To FACILITY h v

NA l 1191 7 8 9 l Z lhl10 l 80

/,,, PUBLICITY 45 NRC USE ONLY

• ISSUED g W@ DESCRIPTION l NA l lllllllllllll2

'o o c*:. 7 h o o y68 SS 8o4 7r'/o13g{.gj ,,o,,,,,,,,,

pp(A.p.TomsOn,R.osru -32.y S ,g ny g. (919) 457-6701 2

. _ . , _ , _ . _ _ . . _ . _ _ . . _ _ . _ .._. . _ _ _ _ . . . . _ _ _ . _ .