ML20086F321
| ML20086F321 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 06/16/1977 |
| From: | Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | Stello V Office of Nuclear Reactor Regulation |
| References | |
| RO-77-15, NUDOCS 8312210081 | |
| Download: ML20086F321 (2) | |
Text
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PHILADELPHIA ELECTRIC COMPANY 2301 MARKET STREET P.O. BOX 8699 IE ' FILE COPY-PHILADELPHIA. PA.19101 (2151841 4o00 June 16, 1977 Sk
~
Mr. Victor Stello, Jr.
, ;,[;^'~'~74, '
'i b s
Director Division of Operating Reactors
- f..y Office of Nuclear Reactor Regulations
/(
U. S. Nuclear Regulatory Commission l ';
7 Washington, D. C.
20555 j;
o ; : l;];] y, is.vm.,,[.f'in
Dear Mr. Stello:
(-
qq~u
SUBJECT:
ENVIRONMENTAL DEVIATION
\\
.,N The following deviation was reported to Mr. Greenma Chfic of Inspection and Enforcement, Region I, United States Nuclear Regulatory Commission on June 7, 1977.
Reference:
License Number DPR-44/56 Environmental Technical Specifications:
2.2.3 Report No. :
50-277/278-77-15 Report Date:
June 16, 1977 Deviation Date:
June 6,1977 Facility:
Peach Bottom Atomic Power Station Units 2 and 3 R. D. 1, Delta, PA 17314 Identification of Deviation:
The pH for the sewage plant effluent exceeded the Environmental Technical Specification limit.
Conditions Prior to Deviation:
Sewage plant operating normally.
Description of Deviation:
A daily grab sample from the sewage plant effluent neasured a pH of 5.3.
The Technical Specification limit is that pH shall be within 8312210081 770616 DRADOCK05000g 77174oots COPY SENT REGION-1
m.
o o
s Mr.' Victor Stello, Jr.
50-277/278-77-15
{
June 16, 1977 Page 2 1
i 1
f the range of 6.0 to 9.0 I
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Designation of Apparent Cause of Deviation:
I j
An acidic solution may have been flushed into the sewage system and l
reduced the pH of the whole system; however, since no such source could i
be located it is thought that the low pH of the effluent was caused by the development of a bacterial strain which produces a low pH during.
the digestive process. Our sewage plant consultant (Betz Environmental j
Engineers, Inc.) indicated that neutralization of the aeration tank at this
{
time would only prolong the life of organisms.
j Analysis of Deviation:
}
l The duration of this deviation was about 3 days. An attempt l
was made to neutralize the effluent just before its release to the river.
t Since the flow from the sewage plant is not constant during the day, this method of pH control was not completely successful during the peak flow periods. Because the effluent from the sewage plant was being diluted by a factor of 50,000 at these times, the pH change in the circulating water j
leaving the discharge canal was not detectable. The environmental impact was insignificant.
Corrective Action:
1' The sewage plant was allowed to operate and within 3 days the f
pH had returned to within limits. A joint effort between Peach Bottom and Betz Environmental Engineers, Inc. is underway to optimize j
the operation of the sewage plant in order to prevent further deviation j
of this nature
}
Failure Data:
l j
Several previous occurrences.
Very-truly yours, l
l I
M'
.}
C6oney l
Suprintendent Generation Division - Nuclear cc:
Mr. J.-P. O'Reilly NRC, Reg. Office i
.