05000336/LER-1979-007-03, /03L-0 on 790228:both Control Room Chlorine Detection Sys Declared Inoperable.Caused by Improper Calibr of Detectors Due to Use of Inaccurate Calibr Gas.Sys Returned to Svc After Recalibr

/03L-0 on 790228:both Control Room Chlorine Detection Sys Declared Inoperable.Caused by Improper Calibr of Detectors Due to Use of Inaccurate Calibr Gas.Sys Returned to Svc After Recalibr

ML19273B564
Person / Time
Site:	Millstone
Issue date:	03/30/1979
From:	NORTHEAST UTILITIES
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19273B559	List: 05000336/LER-1979-007, Forwards LER 79-007/03L-0 05000336/LER-1979-007-03, /03L-0 on 790228:both Control Room Chlorine Detection Sys Declared Inoperable.Caused by Improper Calibr of Detectors Due to Use of Inaccurate Calibr Gas.Sys Returned to Svc After Recalibr
References
LER-79-007-03L-01, LER-79-7-3L-1, NUDOCS 7904090173
Download: ML19273B564 (1)

LER-1979-007, /03L-0 on 790228:both Control Room Chlorine Detection Sys Declared Inoperable.Caused by Improper Calibr of Detectors Due to Use of Inaccurate Calibr Gas.Sys Returned to Svc After Recalibr

Event date:
Report date:
3361979007R03 - NRC Website

text

'

..... ~

LICENSEE EVENT REPORT

~ COr TROL 8 LOCK: l l

l l

l l

l (PLE ASE PRINT On TYPE ALL REQUIREO INFORMATION) 1 6

B l cl Tl til til sl 21@l 010 l-lo 0 l0 0l0l-]0]o gj4l1l1(1l1l@l l

[g 25 26 LICt%E T vrg JO 31 C A f SS d 3 LICENSEE CODE 14 15 LICENSE NUvM H

"'" 'y l L }@l 0 ] 5 l 0 l 0 l 0 l 3 l 3 16 l@l0 l 2l 2 ] 8] 7 l 9 j@l 0 l 3 l 3 l 0 l 7 l 9

• T

]

60 61 DOCKET P.Uvein 64 63 EVta4T D AT E T4 75 REPOR T DATE 83 cn 8

EVENT DESCRIPTION AND PROBAGLE CONSEQUE*JCES h y l Following a scheduled surveillance on the control roon chlorine detection system y ; both systens were declared inoperable when the detectors failed calibration The control roon emergency ventilation system was immediately placed g

E L procedures.

ifications j

in the recirculation mode of operation in accordance with Technical Spec g(

Following recalibration, the detectors were g [ Section 3.3.3.6 action statenent b.

returned to service and control roon ventilation restored to normal.

[7] l l

60 Ta~1 1 COY P.

VALVE SYSTEM

CAUSE

CAUSE CODE CODE SUBCorE COMPO).E NT CODE SUSCOOf Su s CO D c.

T67 II IF l@ l Xl@ ( Z l@ l Zl Z Z j Z j Z l Z l@ l Z l@

Z[@

9 9

10 11 12 TJ 18 19 20 REVISION SEQUF NTI AL OCCUARENCE REoORT

,,,,, EVENT YEAR REPORT NO.

CODE TYPE N O.

@ yg'RO l7l9l l-l l0 0 l7 l y

10l3]

lL l l-l0 l LER R

2l 22 23 24 26 27 28 2')

30 31 32 t h1 O FO ?

D.

5 plt mar FA T TCR TAKE?

A Oa O4PLA T P T O HOURS 22 SB [E_J@lZ]@

l Z ]@

W@

l 0 l0 l0 lU l jftl@

W@

lZl@

l Z (9 l9 [9 l@

33 34 3S 26 31 40 41 42 43 44 47 CAUSE DESCRIPTION AND CONNECTIVE ACTIONS h l The detectors were declared out of calibration as a result of using inaccurate l

o Recalibration using new calibration gas restored the detectors 1, j l calibration gas.

The cause of the gas inaccuracy is not known at this tine and

,,73l to operable status.

Results will be j

the container has been returned to the vendor for analysis.

3 )

j included in an update report.

i i

80 8 9 bl5CO Y

DISCOVERY DESCRIPTION si

% POWER OTHER STATUS l E l@ l ll 0 l O l@l NA l

lB l@l Operator surveillance l

i s

AC TIVt TY COeTENT LOCATION OF FiELE ASE t'^

l I

t'^

l RELE ASED OF RELE ASE AMOUNT CF ACTIVITY iJc] [7J @ l zl@l 80 44 45 8 3 no PERSONr4EL E XPOSURES

}

WUMBER TYPE DESCRlPTICN 0l0l0j@ W @l fla 1

7 6

S0 IES OcsCniPriON@

I PER50P '4EL INJU 4

NuveER l0l0l0l@l flA 80 i

x 8 9 11 12 LOM OF OH DAf TAGE TO FACILtTY Q l

TYPE OCSCniPTION

%/

LZJ@l t'^

80 i

o 7004090 /U NRC USE ONLY B 9 10 PUBL ICI T Y l

tlA l

ll1ifIIIIIIIl~

[ 2 l o l [ rij@ DESCRIPTION ISSUE D 80*

68 61 10

• MA O