ML19224D819

LER 79-014/03L-0 on 790509:chamber Vent Valve for Torus Level Transmitter Was Left Closed.Caused by Technician Error.Vent Valve Opened & PC-LT-12 Placed Back Into Svc

ML19224D819
Person / Time
Site:	Cooper
Issue date:	06/08/1979
From:	Lawrence L NEBRASKA PUBLIC POWER DISTRICT
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19224D817	List: ML19224D816 ML19224D819
References
LER-79-014-03L, LER-79-14-3L, NUDOCS 7907170082
Download: ML19224D819 (1)

Text

NRC FOAM 366 U. S. NUCLE AR R EGULATORY COMMISSION 17271 '

LICENSEE EVENT REPORT CONTROL sLOCx: l l l l l@ (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) o i NlE l C l P l R l 1to l@l15 0 l 0 l - l 0 l LICEN5E 0 0 NuM8EH 0 l- l0 1 0 25l@l 264 1LtCENSE l1 l1 1l@l37 CAT 68l@

T4 PE 30 7 6 3 LICENSEE CODE CON'T o

O RCI I L @l o l 310 l o 1012 l 9 l b j@l 01510 l9 l 719 hl 74 1 nl REPORT 61 nlD ATE Al ?! oI@ 30 d,

3 ed 61 COCKET NUVSER bd 63 EVENT DATE EVENT DESCRIPTION xND PROS ABLE CONSEQUENCES h o 2 lThe reference chamber vent valve for torus levn1 *m ,wie n- (ur-T T 1 M m loc- I o 3 l closed af ter performing a special checic verifying HPCI-LS-913 upner shutoff valve o 4 l was open and free of obstruction. Torus water level was normal at all times and the 1 o s iredundant level indicator was available and operable. There was no effect upon 1 o ;s lpublic health and safety.

o 7 l l 0id l  !

7 a9 U SYSTEM CAUSE CAUSE COVP V A LV E CCCE CODE SUSCOCE COMPONENT CODE SUFCODE SUSCOCE o 9 I S l Al@ A j@ l Cl@ l Vl Al Ll Vl E j Xl@ l F l@ l L l@

7 8 9 10 11 12 13 IS 19 20

• E QUENTI AL OCCURRENCE REPORT REVISION LE R RO EVENT YE AR REPORT NO. CODE TYPE N O.

O aEg; I 71 91 21 22

-l 23 I 0111 sl 24 26 I/

27 Inl31 23 29 LLJ 30 I-I 31 W32 ACTION FUTURE E88ECT SHUTDOWN A'*ACHMENT N P R O-4 P AIVE COUP. COMPONENT TAKEN ACTION ON PLANT YETHCC HOURS SU9VITTED FORMbOB. SU PP LI E R MANUFACTURER l33Hl@ 34 Zl@ l35 Zl@ lZ 36 l@ l0l0l0l0l 31 .o l Nl@

41 l@ l43L l@ lD 2l 3 247 l@

42 44 CAUSE CESCRIPTION AND CORRECTIVE ACTIONS i o j l A technictan failed to open the reference chamber vent valve for torus PC-LT-12 af ter I i i icompletion of a soecial test. The reference chamber vent valve v,q orn-nd ,-a or-TT 19 i > lplaced back into service. This occurrence has been discussed with the eersonnel in-ii 3 l volved and a copy of the NCR hss been routed to all Instrument Technicians. I i i4 l l 7 3 3 80 ST S  % POWER OTHER STATUS IS OV RY OISCON ERY DESCRIPTION 7

1 5 8 9 lEl@ l0l5l0l@l to 12 11 NA 44 l45A l@l 46 Operator Observation 80 AC TIVI TY CONTENT RELEASED OF RELE ASE AYOUNT OF ACTIVITY #

LOCATION OF RELEASE '

i e NA l NA l 3 9 I Z l @ l Zl@l 10 11 44 45 30 PERSONNEL E XPOSLR ES NuvaER TYPE OESCRIPTION

• 7 i 7 3 3 l0l0l0l@lZl@l 11 12 13 NA E-l PERSONNE y :NJUR:E$

NUVBER CESCRIPTION

4 d 3 0l0 01@l ii 12 NA MB 80 l

LOSS OF OR OAYAGE TO FACILITY TvPE O E SC RIP'IC N u ee 717 OMK 1 9 6 3 lZl@l'O NA 30 PU s u Ci TY NRC USE ONLY Q(7 h 7

2 o g 3 lN[ El D@NADESCR:P TION

SSL la JJ) V 'r 68 69 Qlll))l l1l1 l$I 80 ;

NAME OF P9EPARER

. . a ence PHCNE: 402-825-3811 2,