ML20039G057

LER 81-049/03L-0:on 811208,both Torus Level Indications Momentarily Out of Svc.Caused by Failure of Technicians to Obtain Shift Supervisor Authorization Prior to Starting Calibr Test.Instrument Calibr & Employee to Be Disciplined

ML20039G057
Person / Time
Site:	Duane Arnold
Issue date:	01/06/1982
From:	Van Sickel J IES UTILITIES INC., (FORMERLY IOWA ELECTRIC LIGHT
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20039G052	List: ML20039G051 ML20039G057
References
LER-81-049-03L, LER-81-49-3L, NUDOCS 8201150238
Download: ML20039G057 (3)

Text

,

Nnc pcru 344 U.S. NUCLEAR ME!uLATERY cOMMSSSICM mm

. LICENSEE EVENT REPORT coNTaot acccx: l i

l l 1 1 I l@ IPt:Asa PRINT OR TY*d AU.rEQUIKE3 INFOIMARCM fo# T 1 1 IIA lo la !c 11 !@l 0101 -10101010 I o I UC3%584C:og i. 15 UCthat Nuwt&A I a i o29 l@l 7e a IUCEMst i l i iTYPE i i i40l@lSi CAT i H

I@

3 4 9 CCN'T IoIiI ey,C l L @l0 15 10 fu I O I 3 l 3sa l 1et @l1 1 2 1 0l8l8l1 gj0l110]6l8]21@

EVENT oATR 7. 7S ASPoRT cATE 40 7 8 60 68 coCEET Nuutta EVENT QEscRIPT!oN AND PRC8A8LE CONSECUENcES h t o 121 1 During surveillance testing both torus level indications were momentaril I to # 2 I y out of service. LT 4363B was being returned to service following desig i io 9: I n change work. Following calibration of LT 43638, calibration of LT 2325 I io # s i l was begun. A fuse was inadvertently opened which f ailed the torus level I io is i i indication provided by LT 2325. A control room operator found the recor I

~

lo 1711 der associated with LT 43638 readina unscale and the recorder associated I t o is i 1 with LT 2325 readina downscale. 7 Day LCO entered. See T.S. Table 3.2-F. I so r as "oTa" C To$ sueCEs C:= Pome =T Coos susEo's ssCoos loist I I 10 l@ [ Aj@ (,,,G,j@ l I I N I S I T l R I Ul@: [IJ@ 20[]J @

F S S 30 18 12 32 IS IS S$QudpsTIAL QCCUARENCE AGPCRT AEVIS80N tytNTYEAA REPomT set lL Coo 8 TYPt eso.

@ y*Ltprac y$

t h Il I l-l lo 1419 l [f_] I ol 31 lLl (--J l0l a  :: :2 2 as as 2: 2s so si 22 E'N ?CW!! o!N5!T 57tTXo" ouas ^E!?r"TE' ,8l"i0.. '"!"Atf.7 '

,..T0!#lta LEj@L.BJ@ 1.2-.]@

23 l.Z.J@

a. v IoIoI o0 @I l.YJ@ o I IN 2 l@ L.2ti l@lGl0I8lOl@ _

.T 22 2 i causs oEscaiPmoN ANo ccanEcrivE AcTroNs @

l 6oIlpnrennnoi nrrnr Tan +newntriane nnrrnr-<nn +hn cim otil,nco +nr+ ata nn I i,e,ii t obtain shift supervisor authorization prior to beginning the calibrati

~

t i,,2,'i on of LT 2325. Had this been done, the operability of LT 43638 and its as I sie3i l sociated recorder would have been verified prior to granting authorizati i m l on. Indication lost 5 min. Instruments cal'ed. Pers. to be disciplined. no I

s a s STA  % Powf R oT**EP STATUS So R otScovinv otSCAiPTION liisILF_j@ 101510l@lNA l l A l@l Operator Observation l ACTIVITY Co TENT atLEAtto cPmittAss AMOUNT CP .CT1veTY LeCATICM cF adLEAst l1 { 6 I (J_,j @ ll,j@l NA I l NA l 7 4 9 10 11 .S 3a

= *t#5CNNEL 88PC3umt3 Nuusta Tvrt otsCRIPTICM I:171 in h h l@LIJ@l n I

Plaso w tt.=au'n'its Muutta OESCm:PT1om M I n I n l n Ihl ya l

> e 9 is i: 30

'T$*t " "c Es'Cn'Mo' '"" @

l Lua.1

• S Lz_l@l-7 '0" 8201150238 820106 80 NRC USE oNLY issut"*'((Cn o PTio @ [DRADOCK 05000331 PDR u.LJ L,.l@l g g ggg;99;;g,,9lg 7 8 9 to 48 69 30 3 NAME Of PREPARER 1 Van Sirt ni PMcNE: 319-851-5611 f,

i

- DUANE ARNOLD ENERGY CENTER Iowa Electric Light and Power Company Licensee Event Report - Supplemental Data Docket No. 050-0331 Licensee Event Report Date: 1-6-82 Reportable Occurrence No: 81-049 Event Description During surveillance testing, both torus level indications in the control room were momentarily out of service. LT 4363B was being returned to service following design change work which required the instrument be isolated. LT 4363B was providing a downscale indication on its associated recorder, LR 4384C, due to water which had accumulated in the instrument "high side following completion of a hydrostatic test associated with the design change work. The water was drained from the instrument line and the instrument spanned and calibrated. Since the normal surveillance was due for both torus level instrument channels, the technicians doing the work then began preprations to calibrate the redundant torus level transmitter, LT 2325. While connecting test instrumentation a fuse was inadvertently opened which f ailed the torus level indication provided by LT 2325 and its associated recorder, LR 4385B. At approximately the same time, a control room operator checking the back panels found LR 4385B indicating downscale due to the open fuse and LR 4384C reading upscale. The technicians were alerted and the fuse was replaced which restored torus level indication in the control room. Level indication was lost for approximately 5 minutes.

The control room operator jiggled LR 4384C and the recorder pen dropped to approximately 42% indication. The pen had apparently stuck upscale during the spanning and calibration of LT 4363B. The recorder should have been indicating approximately 50%. The technicians then drained an additional slight amount of water from the high side of LT 4363B which resulted in the expected level indication being restored on LR 4384C. The surveillance test was later completed with no additional problems noted. Technical Specification Table 3.2-F requires two torus water level indications in the control room. This specification was not met for approximately five minutes and a 7 day LC0 was entered. There has been one previous occurrence in which both torus level transmitters were inaccurately calibrated with a similar cause (see R0 80-062).

Cause Description The cause of this event was determined to be personnel error. The technicians performing the surveillance test did not obtain authorization from the shif t supervisor prior to beginning the calibration of the redundant torus level indication channel (LT 2325/LR 4385B) after completing calibration of the level transmitter (LT 43638) for the first channel as is Had this been done the operability of LT required by the test procedure.

4363B and LR 4384C would have been verified in the control room prior to the granting of autnorization to begin the calibration on the redundant channel.

Page 1 of 2

'DUANE ARNOLD ENERGY CENTER

. lowa Electric Light and Power Company Licensee Event Report -' Supplemental Data Docket No. 050-0331 -

Licensee Event Report Date

~1-6-82

-Reportable Occurrence No: 81-049 Corrective Action The personnel involved will be disciplined.. In' addition, the procedure will be reviewed and changes made to organize the test format in a more practical manner and to provide stronger direction that shift supervisor approval nJst--

be obtained prior to beginning work on either-torus level indication channel.

Page- 2 of 2