ML19289F137

LER 79-023/04T-0 on 790515:routine Ph Analysis of Sewage Plant Effluent Identified Ph of 5.8 Which Exceeded Tech Specs.Caused by Air Blower Failure Which Allowed Dissolved Oxygen to Drop to 0 & Aeration Tank to Become Anaerobic

ML19289F137
Person / Time
Site:	Peach Bottom
Issue date:	05/25/1979
From:	Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19289F131	List: ML19289F130 ML19289F137
References
LER-79-023-04T, LER-79-23-4T, NUDOCS 7906040316
Download: ML19289F137 (1)

Text

U. S. NUCLE AM HEuuL AT UH i L OMotMi r

. 7 OHM %4 n Report No. 2-79-23/4T-0 UAtt 2- LICENSEE EVENT REPORT iPLE Ass paint OR TYPE ALL REQUtRED INPORMATIONI conTRoteLoCx:l l l I I I l l@

b l P I A I P I B l S l 2 l@18 8 9 LICENSEE coo 4 84 Ol0 l- l0 lo lO 10 10 l0 l 0I Ol@ 4l 1l 1l 1l UCENs4Nuuata 2$ M uC3N64 TvPt Jo 5 3 C A f be N'T E 8 c

to L @L0 l 5DOCKET el l0 l-Nyuegn l01217 l7 @l 0151115 ( 719 @l01512151719 l@

se e9 EVENT OAT 5 74 75 REPORT DAfg 8o EVENT DESCRIPTION AND PRO 8A8tE CONSEQUENCES h I EI Routine pH analysis of sewage olant effluent identified a eR of 5.8 1

TTl I which exceeded the Tech Soec rance of 6.0 to 9.0. The pH of the effluent I

E was below 6.0 for less than 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> a ft e* Afgrava m N -W n# % men

• affacted due to I TIl I enterinz Conowinco Pond from the discharce caral vas not l

6 l the laree dilution factor. The enviroerental Mact was insf onf ficant.

i Til I

a ..

C oCE ,aMPoNENT CooE Suecod4 Su a 9 l win tol@ Ls._1@ La_l@ al tl 01 u t s i al@ Lz.J@ DLJ 18 is 20 G

9 11 12 13 S OCCURR(kCE RJPCRT R EVistoN Siou(NTIAL No, REPoAT NO, COOS TYPE g

b "(y,gfgo E

EVENT YEAR l7l8l 10 l2 l3 l y l0i4l n

y

[j

[0,j n

3 2, n u u n ,, =

SutueTT PoRM a, MA, FAC REn T4 N ACT P T METMoo Hove 5 ??

l B g[24Zj@

is Wg y@-

as x si 0 l0 l0 lU l

.o Q@ WQ et u W@

a l H l 2 l 2 l 3., l@

u CAUSE DESCRIPTION ANDCORRECTIVE ACTIONS

• l i o 1 Failure of air blowers allowed the dissolved oxygen level to droc to i

i i i sero. This caused the aeration tank t ; go to an anaerobic condition I

7- 1 ( which drops pH. Aeration tank was neutralized and air te=porarily sup-

, 3 l plied to bring pH within limits. Blowers were repaired. F.odification to I

i 4 l provide automatic pH control is presently under investigation. so

's'r'Eu's' s conn ormasTATus h Es SOv# ciscovanvoasCawTioN @

l i s y@ l 1l 0 l 0 l@l N/A l lBl@l Surveillance Test

' $nvity cc'OrtNT " "

A AuouMTor Activity h Locarion os astsAss h I

1 6 l N/A  ! l N/A "

astAsao@oraeLaaselZl@dEss PensoNNLrxPos suvesa tyPs oesCairnoN h i i l 0 l 0 l0 l@l Z l@l N/A so PER$oNNE t INJURIES

~e.... o.s

,,ioNeN/A 2936 084 t- I i a n 9 l0l0l0l@l n n Ni"'"oes^c"a*Pr'o'N '"" h 7 9 0 6 0 4.0 3iC l N/A i 0

, i E l@l io

[g'M o w ~

t 2 o i[.N_

ayf f@OtsCRIPTION l N/A l lllllll1lIlIII ao s i , > io j jpm '

es ca

(**!< $41-5020 M. J. Coonev _ _ . , , , (