05000315/LER-1979-035-03, /03L-0 on 790705:while Cleanup of Demineralized Water Sys Was in Process,Rcs Passed from Operational Mode 5 to Mode 4 & Isolation Valves Closed.Caused by Breakdown of Communication Between Cleanup Crew & Reactor Operator

/03L-0 on 790705:while Cleanup of Demineralized Water Sys Was in Process,Rcs Passed from Operational Mode 5 to Mode 4 & Isolation Valves Closed.Caused by Breakdown of Communication Between Cleanup Crew & Reactor Operator

ML17317B413
Person / Time
Site:	Cook
Issue date:	07/31/1979
From:	Lease R INDIANA MICHIGAN POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML17317B411	List: 05000315/LER-1979-034, /03L-0 on 790705:during Plant Tour,Two Ice Condenser Intermediate Deck Doors Were Found Frozen Shut. Cause Not Determined.No Further Action Planned.Formerly Numbered Incorrectly as LER 79-034/03L-0 05000315/LER-1979-035-03, /03L-0 on 790705:while Cleanup of Demineralized Water Sys Was in Process,Rcs Passed from Operational Mode 5 to Mode 4 & Isolation Valves Closed.Caused by Breakdown of Communication Between Cleanup Crew & Reactor Operator ML17317B410
References
LER-79-035-03L, LER-79-35-3L, NUDOCS 7908060430
Download: ML17317B413 (2)

LER-1979-035, /03L-0 on 790705:while Cleanup of Demineralized Water Sys Was in Process,Rcs Passed from Operational Mode 5 to Mode 4 & Isolation Valves Closed.Caused by Breakdown of Communication Between Cleanup Crew & Reactor Operator

Event date:
Report date:
3151979035R03 - NRC Website

text

NRC FORM 366 I7.77)

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U.

UCLEAR REGULATORY COMMISSION LICENSEE EVENT REPORT [001 7

8 CON'T

~01 7

8

~0 CONTROL BLOCK:

9 LICENSEE CODE

,Q 14 15

{PLEASE PRINT OR TYPE ALLREQUIRED INFORMATION)

Q Q4LLJ Qo 25 26 LICENSE TYPE 30 57 CAT 58 LICENSE NUMBER SOURCE L~lQ 60 61 DOCK ET NUMBER EVENT DESCRIPTION AND PROBABLE CONSEQUENCES THE DEMINERALIZED WATER SYSTEM WA 68 69 EVENT DATE Q10 74 75 REPORT DATE 80 0

7 B

Qg

~03 THE CONTAINMENT.

THIS RE UIRES THAT THE TWO MANUAL CONTAINMENT ISOLATION VALVES

~04 DW-209 AND DW-210 IN THE SUPPLY" HEADER BE OPEN.

WHILf THIS CLEA P

~os GOING ON, REACTOR COOLANT SYSTEM HEATUP WAS IN PROGRESS AND THE RCS PASSED FROM

~06 OPERATIONAL MODE 5 TO 4.

THE TWO ISOLATION VALVES HAD E

N C

~07 CONTAINMENT ISOLATION VERIFICATION 'PRIOR TO START OF HEATUP AND WERE OPENED UNDER

~os ADMINISTRATIVE CONTROL.

THf VALVES WERf CLOSED 3

HOURS AND 58 MINUT ONTINUED 7

8 9

80

~Og SYSTEM

CAUSE

CAUSE COMP.

VALVE CODE CODE SUBCODE COMPONENT CODE SUBCOOE SUBCODE

~NC Qll

~AQ2

~AQ13 Z

Z Z

Z Z

Z Q4

~ZQ>>

Z Qlo 7

8 9

10 11 12 13 18 19 20 SEQUENTIAL OCCURRENCE REPORT REVISION LER/RP EVENT YEAR REPORT NO.

CODE TYPE NO.

Q77 "lao "7 ~79

+

~03 5

+~

+~+

+L 21 22 23 24 26 27 28 29 30 31 32 ACTION FUTURE EFFECT SHUTDOWN ATTACHMENT NPRDK PRIME COMP.

COMPONENT TAKEN ACTION ON PLANT METHOD HOURS Q22 SUBMITTED FORM SUB.

SUPPLIER MANUFACTURER GB~Q>>

~Q20 LJQ21 0

0 0

0 Y Q

~NQ24

~ZQ26 Q

33 34 35 36 37 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS Q27 o

COMMUNICATION BETWEEN THE CLEANUP CREW AND THE R A T PERATOR ROK WN THE CLfANUP EFFORT WAS NOT DISCONTINUED PRIOR TO ENT RING M

REOCCURENCE A DESIGN MODIFICATION HAS BEEN RE UESTED TO E UIP THIS LINE WITH 3

AUTOMATIC ISOLATION VALVES~

METHOD OF OTHER STATUS ~

DISCOVERY

~AQ31 45 46 45 7 90806~8 ~

4 7

8 9

FACILITY STATUS

% POWER 8

C Q28 ~00 0Qw NA 7

8 9

10 12 13 44 ACTIVITY CONTENT RELEASED OF RELEASE AMOUNTOF ACTIVITYQ 6

~Z Q33

~ZQ34 NA 7

8 9

10 44 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION Q39 7 ~00 0

Q37~ZQ38 NA 7

8 9

11 12 13 PERSONNEL INJURIES NUMBER DESCRIPTIONQ1

~l8 ~00 0

Q4o NA 7

8 9

11 12 LOSS OF OR OAN'IAGE TO FACILITY Q43 TYPE

DESCRIPTION

g

~ZQ42 NA 7

8 9

10 PUBLICITY ISSUED DESCRIPTIONQ

~20

~N Q44 NA 8

9 10 DISCOVERY DESCRIPTION

+32 OPERATOR KNOWLEDGE LOCATIONOF RELEASE Q NA NRC USF. ONLY 68 69 80 80 80 80 80 80

'0 7

80 o

NAMF OF PREPARER R.

S

~

LEASE (616) 465-5901 X-313;

ATTACHMENT TO LER 0 79-035/03L-0 PAGE 2

EVENT DESCRIPTION

AND PROBABLE CONSEQUENCES:

AFTER ENTRY INTO NODE 4.