ML19312E138

LER 80-019/01T-0:on 800516,AEOG Rad Monitors17-150 a & B Made Inoperative Under Controlled Conditions While Evaluating Augmented Offgas Sys (Aog) Recombiner Temps. Caused by Dihydrogen Recombination Before Aog Recombiner

ML19312E138
Person / Time
Site:	Vermont Yankee
Issue date:	05/30/1980
From:	Murphy W VERMONT YANKEE NUCLEAR POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19312E134	List: ML19312E133 ML19312E138
References
LER-80-019-01T, LER-80-19-1T, NUDOCS 8006030333
Download: ML19312E138 (1)

Text

NRC FORM 366 u. d Nut;Lk AH H ebuLa t uM y UuMMisseum_ _ _ ,

(7-77)

LICENSEE EVENT REPORT LER 80-19/1T CONTROL eLOCx: l 1

l l l l l l@

6 (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) lo li 8l l9 Vl TLICENSEE 7

l v l YCODE l S l 1 l@l 14 15 0 l 0 l- l 0LICENSE l o 10 l 010 l- l01025l@l264 l1LICENSE NUY8EH l111TYPE l l 1JOl@l b7 CAT $8 l@

CON'T 10111 3$"c[ 60l L l@l61 0 ] 5 DOCK ] 0 lET0NUMBER l 0 l 2 l 768l 169@l 0EVENT l 5DATE l 1 l 6 l 8 l 075 l@lREPORT 0 l DATE 5 l 3 l 080 l 8 l 0 l@

i 8 74 EVENT DESCRIPTION AND PROB A8LE CONSEQUENCES h o 2 l AEOG Rad Monitors17-150 A & B were made inoperative under controlled conditions whilel

,oi3; ] evaluating low A0G recombiner temps. This was contrary to Tech. Spec. Table 3.2.4 l gol4l l requirements. Based on Off Gas System samples and Stack Monitors, there were no l

[ g ; ,, l l adverse consequences to the public health or safety. No previous reportable occur- l l 0 l6 l l rences of this type have been reported to the commission. l I

1o 171 I I

10181 I 80

/ 8 9 C DE CODE SUBCO E COMPONENT CODE SUBC DE SU E l0l9l l Ml Bjh Wh Wh lZ lZ lZ lZ lZ lZ lh l Zlh l Zlh 20 7 8 9 qo 11 12 13 18 19 REVISION

_ SEQUENTI AL OCCUR R E NCE REPORT LER RO EVENT YE AR REPORT NO. CODE TYPE No.

O reg _ l218 22 l0 l [--J 23 l0 l1 l9 l 24 26 l/l 27 l0 l1 l 28 73 lTl 30 l-l 31 l 0l 32 AKE ACT OP O L NT MET HOURS 22 S8 IT FO 4 B. SUPPLIE MAN FACTURER lXl@lZl@ W@ y@ l0 l0 l0 l0 l 40 y@

41 y@ lZ 43 l@ lZ l9 l9 l9 47l @ '

44 JJ 34 35 36 3/ 42 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h l i j o l l Investigation of low recombiner temps, by plant personnel indicated that H7 recom- l

[ilil lbination occurred before A0G recombiner. Closing valve OGS-520 for 10 mins. under I

, , l controlled conditions helped to evaluate recombiner temps. Because rad monitors l i 3 lwere manually isolated to obtain needed information,no further corrective action is l lil4l l required. l 7 8 9 80 ST S  % POWER OTHER STATUS IS O HY DISCOVERY DESCRIPTION i 5 [_E_jh l1 l 0 l 0 l@l NA l l Z lhl NA l ACTIVITY CO TENT RELEASED OF RELE ASE AVOUNT OF ACTIVITY LOCATION OF RELEASE NA l l t lc8 9l W @ W@l to 13 NA 44 l l 45 80 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION NA l l 1 l 7 l l 0 l 0 l O l@l Z l@l PERSONNE L INJU IES NUVRE R DESCRIPTION i

i a 8 9 l0l0l0l@l si 12 NA 80 l

LOSS TYPE OF OR DAMAGE TO FACILITY Q DESCRIPTION  %/

7 1 9 8 9 dhl to NA l PUBLICITY NRC USE ONLY Ob

• ISSUE D D 2 o Uhl ESCRIPTION Status Phone l Il11IIIIllllIi 7 8 9 10 68 69 80 5 rren P. Murphy AME OF PREPARER PHONE: h

3006080 3 .s