ML19262C230

LER 80-003/03L-0:on 800107,discovered That Air Sample Station 3.3 Was Not Drawing Continuous Sample.No Sample Obtained 791230-800107.Caused by Tygon Tube Being Disconnected from Gas Flow Meter to Air Sampling Head

ML19262C230
Person / Time
Site:	Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date:	02/04/1980
From:	Conway W VERMONT YANKEE NUCLEAR POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19262C228	List: ML19262C227 ML19262C230
References
LER-80-003-03L, LER-80-3-3L, NUDOCS 8002080418
Download: ML19262C230 (2)

Text

~, ~,. _ . . . . . . . _ _ . . . . . _ _ _ _ . .. ..

(7477 UCENSEE EVENT REPORT LER 80-3/3L CONTROL BLOCK: l l l l l l l (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) i o o i IV ITIV Iv is il@l0101-l01010 14 LICENSg No esR 0 1 01 - 01 O l@l a l il 11 1 Il@l I 25 26 LICENSE TYPE J0 57 GAT 5a 7 d 3 UCENSEE C00E 15 CON *T 0l' 3

" 7RCE IL hl01510l0l0l2l7 11 hl011 l0 17 l8 10 @loloRE8CRT O

60 61 OOCKET NUMBER os 69 EVENT D ATE 74 75 lo is DATEla lo @ 80 EVENT OESCRIPTION AND PROBABLE CONSEQUENCES h oI2 l l o 3 i See attached sheet I o 14 l l 0 65 i I o 6 l l o 7 l l G is i 1 80 7 s9 SYSTE M CAUSE CAUSE COMP. VA LV E CODE CODE SUSCODE COMPONENT CODE SUSCODE SUSCOCE 7

o 9 8

l B l B lh Wh lB l@ l Pl Il Pl El Xl Xlh l A l@ ]@

9 10 11 12 13 18 19 20 SECUENTIAL OCCURRENCE REPORT REVISION L EV ENT YEAR REPORT NO. CODE TYPE NO.

O .a'E "

uMBU R 'RO l 8I OI l-l l Ol 01 31 l'l IOI3329 -- IL I l-I IOl 21 22 23 74 26 27 23 30 31 32 TAK N AC ON ONP NT ME HOURS S8 I E PCR 8. SU LE MANUPAC RER lFl@(_Z]@

33 34 l Zl h 35

[36Z_j h 37l Ol Ol 01 0l 40 lY@

41 l42N I@ l Xl@

A3 l Xl 9 l 919l@

44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h 1 0 l 1 1 9ee ,renched Rhee* l t 2 l 1 3 l l 1 4 l l 7 8 3 80 STA  % POWER OTHER STATUS 015 O RY OtsCOVERY DESCRIPTION i 5 Wh l Ol 7l 5lhl NA l lB lhl Technician Observation l ACTi% 'TY CO$ TENT RELEASEO CP RELEASE AMOUNT OP ACTIVITY LOCATION OP RELEASE 7

1 6 4 3 dh to Ql it NA 44 l l 45 MA 1 (J A A 1Q\ SO l

8ERSONNEL EXPOSURES NUM8ER DESCRIPT1CN l / Li 9 1 () i i '

1010101@lZTYPE l @l NA l

' ' ' S 8ERSO~~ ENu2 ES NUV8ER D 1 3 l 0 l 0 l O !h[ESCRIPTIONNA l IOSS cP OR oNacESO PACiuTY TYPE OESCalPTION c SOO208of/7*

7 i 3 d h!

) 10 NA SO l

'SSUE DE CRIPTION e i

2 o d 3 hl 'O u l 68 69 ll llllll lIlJlj 80 ;

NAME OF PREPARER 7 # NW'" PHONE: 802-257-7711 {

. . VTVYS1 05000271 LER 80-3/3L EVENT DESCRIPTION AND PROBABLE CONSEOUENCES During weekly routine environmental air sample changeout on January 7, 1980, at 1115, it was discovered by the technician that Air Sample Station 3.3 was not drawing a continuous sample as specified by Technicial Specifications 3.9.D.2 and Table 3.9.1. As a consequence of this failure, no sa=ple was obtained for the sampling period from December 30, 1979, at 1223 to January 7, 1980, at 1115 which constitutes a missed surveillance according to Technical Specifications 3.9.D.2 and Table 3.9.1.

Although the plant underwent a shutdown and started up during this period of missed surveillance, vent stack monitoring of releases indi-cated normal low levels of <100 uci/see noble gases for the period, ex-cept for the period of January 5 at 0800 to January 6 at 0800 when a peak of 900 pei/see on January 5, 1980 gg 1700 caused by the daily average to increase to 300 uci/sec. I releases for the above period were 4.49 x 10 " uci/sec. Since all other eight air monitoring a.tations indicated normal environmental conditions during the above period, it was concluded that there were no consequences or potential consequences to the heelch and safety of the public. Previous occurrences involving missed environmental surveillance have been reported to the Commission as RO 76-39, RO 78-18, RO-78-1, and RO 79-19/3L.

CAUSE DESCRIPTION AND CORRECTIVE ACTIONS At the air sampling station, it was discovered that the tygon tube which connected the air sampling head to the gas flow meter had become disconnected from the gas flow meter. This event terminated air flow through the sampling head, which contains the charcoal cartridge and the glass fiber filter.

Corrective actions consisted of immediately reconnecting the tygon tube to the gas meter and iniciating a new weekly sample at the above date and time. Subsequently, stainless steel hose clamps were installed at the inlet to the gas meter to prevent a future recurrence.

I944 182