ML19308C780

LER 79-118/03L-0:on 791231,drywell Atmosphere Monitor a Failed While Monitor B Was Out of Svc,Resulting in Degraded Mode.Apparently Caused by Presence of Moisture in Sample Lines Causing Failure of Sample Pumps & Monitor Detector

ML19308C780
Person / Time
Site:	FitzPatrick
Issue date:	01/28/1980
From:	W. Verne Childs POWER AUTHORITY OF THE STATE OF NEW YORK (NEW YORK
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19308C779	List: ML19308C778 ML19308C780
References
LER-79-118-03L, LER-79-118-3L, NUDOCS 8002010331
Download: ML19308C780 (2)

Text

NRC FOf4M 3G6 am y LICENSEE EVENT REPORT

, CostRot aLOCx: l i

l l l l l l@

(PLE ASE PRINT OR TYPE ALL REOUIRED INFORMATION) 1011 l l N l Y l J l A l F l 1 l@l O l 0l -l 0 l LICErdsE 0l 0 tauvstM l 0 l - l n lJ'JO I26n l@l 4 LICENSE lTIYPEl i l JO 1 l l

$11LAl@l T b6 l@

.,7

, 8 9 LICEN5EE CODE le 15 CON'T

, 4,47 <goS O $ sE l" I60 l@l015 63 10 10 101313 681 31@l DOCKE T NUMBER 69 112DATE EVENT l 3 l 117 74 l759 l@l HEPOHT 0DATE l 1 l 280] 8 l 8 l ffAfI. tI9 > EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h I O 2 l SEE ATTACHMENT

, h, l

O 3 l l

r lo id l I 7, ..

l ITITl I G >

Y o 6 l l

l 10171 l I

101811 80 SYSTf *1 CAUSE CAUse COvP. VALVE CODE CODE SUBCODE CDP.tPONE N T C006 $U6 CODE SUSCODE 10191 p a I B I B IO LxJ@ LZ_JO Iz Iz I z Iz Iz Iz l@ L2_l@ l 20zJ @

9 to li 11 13 18 19

$f GUFNil AL OCCURRENCE REPORT REVISION

. EVENT YF AH nEPORT NO. CODE TYPE NC.

@,a('ggno

• u,.g r 17 19 I 46 21 l-l 11 11 11 18 ]

74 10 W

21 10131 28 2')

ILl JJ l-l 3i

[0]

J2 TA E ACT6) ON Pt of 14 HOUR 5 22 S H ITT D FOf bus. 50 PLIE i MAN F LTURER L xj@lJ4x i@ I Z IO l o lo lo lY i LYj@ [Nj@ l43 Zl@ lZ l9 l9 l9 lj JJ 121@

J'a 3G 31 40 4i 42 44 47 CAUSE OESCHIPilON AND COHHECTIVE ACTIONS li j ol l SEE ATTACNMENT l

~

i t i I __

I li I l i i

1 lilti l

- li p I l 80 7 g 9 ST lt i  % POWI. R OTH[HSTAiUS DISC HY O'5COVERY DESCniPTION l8 I s l [E,J@ l 0l 3l 6l@l NA l y @l Operator Observation l l ' '

' A Tivity CONTENT l nEtt Ann Of HELE Asr AuGUNT OF Activit y LOCAtlON OF f1 ELE ASE i o

[zj @ W@l '

NA l l NA l

pen .oNNel r oosE'iEs NuYar n im g l0 l0 l0j@lZl@l"oE:CnwrioN @N A **

l

' *

• eEnsoNN,l'.NJu'd,Es N o.,n i i.

OEstn Prion @

NA l l' I aH l9lo lo 10 l@l12 80

! 11 t O*5 Or C9 tMVAGE TO UQUTV .s 1YPE DESCAPflON Q l Zl@l 7 8 9 to NA 80 l

Pun E 6ctiv NRC USE ONLY

@ ISSUED U lto @DESCRIPisON NA

'. 800 2 010 33f sal n9lllll1lllll!l80 8 e 9

-l l'

NA?JE OF PREPARER PHONE:

L

, . 1e POWER AUTHORITY OF THE STATE OF NEW YORX JAMES A. FITZPATRICK NUCLEAR POWER PLANT DOCKET NO. 50-333

. ATTACHMENT TO LER 79-Il8/03L-0 Page 1 of I c M . ,c  :

- 't

,' - During normal operations, Drywell Atmosphere Monitor "A" failed while the 1

I"B" .moni tor was out of service. This resulted in operation in a degraded mode

. allowed by Technical Speci fications Appendix A, Paragraph 3.6.D.3 Failure was apparently caused by the presence of moisture or condensation in the sample lines-resulting in failure of the sample pumps and the monitor's detector. To meet _the Technical Speci fication requirenent to obtain a grab sample each 96-hour period, when'the permanently-installed equipment is not available, a

., portable-moni tor-was placed in service in parallel with the permanently installed 1 equipment. 4This por' table equipment provides continuous monitoring of the drywell

atmosphere .therefore the event does not represcnt any signi ficant hazard to the

~

public health and safety.

1.

-Repair and modification of the heat tracing associated with the sample lines is currently being performed to eliminate excessive concentrations of moisture or condensation. in addition, the source of the moisture or condensation could be the result of.a small steam leak inside primary containment in- the general vicinity of the sample point. A special review of the unidenti fied leakage data I for the primary containment has been conducted. This review indicates that such j; ~

leakage (within the limits of Technical Specifications) exists however, the location of the leaks and their possible effect on the monitoring system can not be verified until the next shutdown and cooldown of the plant permitting entry into the primary j con tainnen t . When repair / modification and the investigation into the source of-the

.j moisture Is complete and the permanently installed equipment has been returned to

!j service, a follow-up report will be~ submitted.

L l

i r

. -- _