ML19259B790

LER 79-029/01T-0 on 790306:during Valve Lineup,Auxiliary Operator Mistakenly Closed Borated Water Storage Tank Isolation Valves DH7A & DH7B.Caused by Personnel Error. Valves Opened Immediately

ML19259B790
Person / Time
Site:	Davis Besse
Issue date:	03/16/1979
From:	David Brown TOLEDO EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19259B789	List: ML19259B788 ML19259B790
References
FOIA-79-98 LER-79-029-01T, LER-79-29-1T, NUDOCS 7903230162
Download: ML19259B790 (3)

Text

U. S. UL NRC FnHM 366 (7 77, LICENSEE EVENT REPORT CONTROL BLOCK: l l l l l l l (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) 1 6 to 1 l0 lH lp lB lS l1 l@l 0l 0l -l 0lLICENSE 0] Nl Pl F] -l 0] 3l@l4 NUMBER 25 26 l1 l1 l1l1 @l$7 C lA r 68lg LICENSE TYPE Jo 7 8 9 LICENSEE CODE 14 15 CON'T 7

o 1 8

S$RC[ 60 l L l@l 0 DOCKET 61 l 5 10 l- 10 13 NUMBE R 68 l 4 69 l 6EVENT

@lDATE 0 l3 l 0 l6 (7 l9 74 75 l@l0 REPORT DATE l 3 80 l1 l 6 l 7l 9l@

EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h l o l 2 ] lDuring a valve lineup on 3/6/79, an Auxiliary Operator (AO) mistakenly closed Borated l l o 131 l Water Storage Tank (BWST) Isolation Valves DH7A and DH7B. The A0 returned and informecl The RO realizing that l ggg,y lthe Reactor Operator (RO) that he had closed DH7A and DH7B.

gelosing DH7A and DH7B placed the unit in violation of a Tech Spec, immediately opened l ggg3, gy gg ; lDH7A and DH7B, removing the unit from the violation. There was no danger to the healtli l

<0 gj land safety of the public or station personnel. A safety actuation signal from the ,

l 0 lg ] l Safety Features Actuation System would have opened DH7A and DH7B. (NP-32-79-02) l 80 S BC E COMPONENT CODE SUSCODE SU DE DE CODE lol9l8 l S l F lh W h l B l h l V l A l L l V l E l X l@ [E_J 9 10 tt 12 33 la 19 @ LDJ 20 @

7 OCCURRENCE REPORT REVISION SE QUENTI AL

,,, EVENT YEAR CODE TYPE N O.

REPORT NO.

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@ ,agg/RO 17l9l [-j j 0l 2l 9l d 1011 l Tl l-l [0_j 26 27 28 23 30 31 32

,, , 2 ) 22 23 24 HOURS SS IT SUPPLIE YAN FACTUfER AK N ACT O ON L NT ET Lx J@LZ]@ LZ_J@ I36z l@ 101010 01 40 LIJ@ FO 41 l

42 lY @8. L N_j h 43 lZ b lZlZl@

44 47 JJ 3* _ 35 3/

CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h i o iThis incident was caused by personnel error. An onerator nistakonly closed ET nt+ 1 erl o, -- n 11 v,1,m hv (

i i Ivalves DH7A and DH7B instead of BWST to Borateu Water Recircu1ntinn g

, 7 g 0415 hours0.0048 days <br />0.115 hours <br />6.861772e-4 weeks <br />1.579075e-4 months <br />, the RO discovered that both DH7A and DH7B were closed and immediately iij.,g l opened them from the Control Room. Disciplinary action was taken against the AO. j l

l'i 14 l 1 80 7 8 9 OTHER STATUS DISCO F DISCOVERY DESCRIPTION ST S 4 POWER l l Al@l Operator Observation l l1 l5 l b@ l 0 l 8 l 6 l@l NA ACTIVITY CO TENT LOCATION oF RELE ASE RELEASED OF RELE ASE AMOUNT OF ACTIVITY NA l 1 6 y @ l Z l@lNA 44 l l 45 80 1 8 9 10 tt PERSONNE L EXPOSURES N .MBE R TYPE DESCRIPTION i 7 101010 l@l zl@l NA

' PERSONNEL INJU IES NUMBE R DESCHIPTION@ l i a 101010 l@l12 NA 80 7 8 9 11 LOSS Of oH DAMAGE TO f ACILtiY TYPE DE SCRIP T ION l

1 9 (Zj@l NA

, 8 e io PUHL ICIT Y NRC USE ONLY 4r3 "g O N2- IIlIIllllIl 2 o [fLj l NA ISSUE D@DE SCHiP TION

• 1 68 69 80 ;

7 8 0 10 DVR 79-046 NAME OF PREPAHEn PHONE: