05000277/LER-1979-023-04, /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

From kanterella
(Redirected from ML19289F137)
Jump to navigation Jump to search
/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 Constellation icon.png
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:
References
LER-79-023-04T, LER-79-23-4T, NUDOCS 7906040316
Download: ML19289F137 (1)


LER-1979-023, /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
Event date:
Report date:
2771979023R04 - NRC Website

text

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

. 7 OHM %4 UAtt 2-LICENSEE EVENT REPORT Report No. 2-79-23/4T-0 n

conTRoteLoCx:l l

l I

I I

iPLE Ass paint OR TYPE ALL REQUtRED INPORMATIONI b l P I A I P I B l S l 2 l@18 Ol0 l-l0 lo lO 10 10 l0 l 0I Ol@ 4l 1l 1l 1l l

l@

2$

M uC3N64 TvPt Jo 5 3 C A f be 8 9 LICENSEE coo 4 84 UCENs4Nuuata E

","' L @L0 l 5 l0 l-l01217 l7 @l 0151115 ( 719 @l01512151719 l@

N'T 8

to el DOCKET Nyuegn se e9 EVENT OAT 5 74 75 REPORT DAfg 8o c

EVENT DESCRIPTION AND PRO 8A8tE CONSEQUENCES h EI Routine pH analysis of sewage olant effluent identified a eR of 5.8 I

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 was insf onf ficant.

l 6 l the laree dilution factor. The enviroerental Mact i

Til I

a C

oCE

,aMPoNENT CooE Suecod4 Su a

l win l@ Ls._1@ La_l@

al tl 01 u t s i al@ Lz.J@ DLJ G 9

S 9

to 11 12 13 18 is 20 Siou(NTIAL OCCURR(kCE RJPCRT R EVistoN EVENT YEAR REPoAT NO, COOS TYPE No, b "(y,gfgo l7l8l 10 l2 l3 l y

l0i4l y

[j [0,j g

E 2,

n u

u n

=

n n

3 T4 N ACT P

T METMoo Hove 5 ??

SutueTT PoRM a,

MA, FAC REn 0 l0 l0 lU l Q@

WQ W@

l H l 2 l 2 l 3 l@

l B g[24Zj@ Wg y@-

si

.o et u

a u

is as x

CAUSE DESCRIPTION ANDCORRECTIVE ACTIONS l

Failure of air blowers allowed the dissolved oxygen level to droc to i

o 1 i

i i

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

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

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

l I

provide automatic pH control is presently under investigation.

i 4

l so ormasTATus h Es SOv#

ciscovanvoasCawTioN @

's'r'Eu's' y@ l 1l 0 l 0 l@l N/A l

lBl@l Surveillance Test l

s conn i

s AuouMTor Activity h Locarion os astsAss h

' $nvity cc'OrtNT A

I astAsao@oraeLaaselZl@dEss l

N/A l

N/A 1

6 PensoNNLrxPos oesCairnoN h suvesa tyPs l 0 l 0 l0 l@l Z l@l N/A i

i so o.s

,,ioNe /A 2936 084 I

PER$oNNE t INJURIES

~e....

t-l0l0l0l@l N

i a

n 9 n

n Ni"'"oes^c"a*Pr'o'N '"" h 7 9 0 6 0 4.0 3iC l

E l@l N/A i

0

, i io t

[.N_

l N/A [g'M o w ~

l lllllll1lIlIII i ayf f@OtsCRIPTION 2

o es ca ao s j

jpm i

io M. J. Coonev

(**!<

$41-5020

(