ML20012A315
| ML20012A315 | |
| Person / Time | |
|---|---|
| Site: | Trojan File:Portland General Electric icon.png |
| Issue date: | 02/14/1990 |
| From: | Hess R PORTLAND GENERAL ELECTRIC CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| Shared Package | |
| ML20012A312 | List: |
| References | |
| ES-052-90L, ES-52-90L, NUDOCS 9003090222 | |
| Download: ML20012A315 (3) | |
Text
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^Trajan'NuclG0r Plant:
Document Control Dask
. Dockst 50-344-February 27, 1990
.Licsnso NPF Attachmsnt 14 pages amm
' sum.
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. Portland General ElectricCompany I
February-14, 1990 ES-052-90L Trojan GOV REL 9C L
a Oregon Department of Environmental Quality Northwest Region
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Executive Building 811 SW Sixth Ave Portland OR 97204 x
Gentlemen:
Enclosed is the NPDES report for the Trojan Nuclear Plant for January 1990.
Also enclosed are data required to be submitted in
~,
addition to.that onLstandard NPDES forms.
The plant maintained power operation through the month.
The sewage. Treatment Plant effluent pH and BOD limits were exceeded during the month.
The pH violation occurred on January 7 when the effluent pH was reported as 5.86 with the-NPDES limit at 6.0 to 9.O.
. A review of possible causes for the low.pH has'
' eliminated any ~ process malfunctions or erroneous sampling or analysis as the cause.
The possibility of an unauthorized discharge of.an acidic material into the domestic waste system has also been reviewed but such a discharge could not be confirmed.
y As a precaution, plant personnel have been cautioned not to discharge any chemical. wastes, cooking oils or non-biodegradable materials into the domestic waste-system.
The. sewage treatment effluent-BOD daily. maximum ppm concentration
'and'lbs/ day limit were exceeded on January 10.
The high BOD was caused by high influent flows and restriction of the treatment facility to the " low, flow" operating mode.
The high influent flow rates are attributed to excessive groundwater in-leakage-from the heavy rainfall experienced in early January.
Flow increased from 30-40,000 GPD to 144,000 GPD on January 10 and 147,000 GPD on-January 11~.
The problem of excessive groundwater in-leakage. was compounded by restriction of the treatment facility to low flow.
mode due to an out-of-service control valve.
This valve was determined to be' inoperative when the new treatment facility was placed in service on November 27, 1989.
The valve was removed and 9
9003090222 900227 PDR ADOCK 05000344 S
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. Oregon Department of Env ronmental Qual ty February 1 4.-. 1 9 9 0.
Page 2 sent out for warranty repair and is expected to be returned and installed in mid-February.
The, treatment facility is designed to process a maximum of about 75,000 GPD in low flow mode and 150,000 GPD maximum in high flow mode.
The transition from low flow to the high flow mode does require several days to allow for a sufficient biomass to be developed in the process tanks to provide adequate treatment for-the higher flow rates.
Upon repair and installation of the control valve, it is - anticipated that the plant will be run in high flow mode continuously during the heavy rainfall, fall and winter-months, and during the annual spring refueling outage.
The 100,000 GPD groundwater in-leakage is much~ higher than expected and indicates signif icar.t damage in the wastewater collection system.
Plant engineering has been requested to review this situation and address needed repairs to reduce inleakage to acceptable levels.
The main outfall pH and chlorine monitor continued to ' be out-of-service with grab samples taken to document these parameters.
The main plant outf all chlorine monitor was out of service during January due to a combination of a broken supply line and - a inoperable sample pump.
During this time backup sampling was accomplished as required to verify permit compliance.
.If you have questions, please contact Stan Katkansky at 464-8524.
Sincerely, h
R. J. Hess, Manager Environmental Sciences RJH/SCK: sic Enclosure c:
William Dixon, DOE Paul Yundt Dennis Norton Roger Nelson Bill Peregoy [
Peggy Nelson 2es 1014 l
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49.7 7.)
8.l~
- 7. 9 42 42 45 47 3
5-76 65 (0.1 (0.1 FD l'H,Ct2,003 2
51.9 7.,5 6.0 7.8 '42 42 45 47 3
5 80 65 (0.1 (0.1 FD the Ct2, 005 3
51.9 7.5 7.9 7.8 42 43 44 49 4
5 t) _
66 (0.1 (0.1 FC PH,CL2,CCS-4 50.9 - 7.1 7.9 7.9 43 43 45 47 3
4 80 65 (0.1 (0.1 FD TH,Ct2, DOS
$1.0 7.1
- 7. 9 ' 7. 9 43 43 46 48 3
5 80 45 (0.1 (0.1 F0 FH,Ci2,0;$
43.9 7.1 7.9 7.9 43 44 47 49 4
4 B) 70 (0.1 (0.1 FD PH,CL2,005 7
49.3. 7. 5 7.9 7.9 44 44 48 48 4
4 7e 70 (0.1 (0.1 FD fH,CL2,CDS 8
49.8 7.)
7.8 7.7 44 44 41 50 4
6 90 70'(0.1 (0.1 65 PH,CL2,O'S 9
50'.1 77 7.7 ' 7.t 45 46 41 50 4
4 90 70 (0.1 (0.1 $$
FH,CL2,00$
10 53.6 7.)
7.6 7.7 46 46 - M 50 4
4 75 65 (0.1 (0.1 6S F,8,CL2,0?!
11 51.5 7.3
- 7. 6 7.0 46 41 50
$2 4
6 65 65 (0.1 (0.1 ES Fh, CL2, 0 5 12 51.0 7.h 7.5 7.d 46 46 M
$0 4
4 75 70 (0.1 (0.1 65 Ph Cd, 0:S 13 47.6 7.:
7.5 7.4 46 45 50 50 4
4 60 70 (0.1 (0.1 E5 FH,CL2,C'i 14 51.7 7.d 7.5 7.5 45 45 49 47.
4 4
E0 70 (0.1 (0.! 6$ - PF,CL2,005 15
- $1.0 - 7.1 7.6
- 7. 6' 45 45 49 49 4
4 76 70 (0.1 (0.1 EH - PH,CL2,005 16 50.8 7.4 7.7 7.5. 45 45 41 41 4
4 20 70 (0.1 (0.1 54 ' FH,CL2,005
' 17 -
53.0 7.6 7.8
- 7. 7, 45 45 45 49 3
4 60 70 (0.1 (0.1 SH FH, CL7. 003 18 52,0 7.6 7.7 7.7 44 45 45 49 4
5 65 70 (0.1 (0.1 SK FH,CL2,0:3 19 52.4 7.6 7.9
- 7. 7, 44 44 4!
48 4
-4 E0 70 (0.1 (0.1 69 FH, CL2, 0 S 20
$2.0
- 7. 7, 7.7 7.7 43 44 47 42 4
5 80 70 (0.1 (0.1 SH FH,CL2,0*.5 21
$2.2 7.f 7.9 7.B 43 43 47 42 4
5 90 70_ (0.1- (0.1 LU PH,CL2,005; ?
7 7.8 7.8 43 43 47 47 4
4 B0 70 (0.1 (0.1 EH PH,CL2,005 i
22 52.6 7.
23 53.2
- 7. 7, 7.9
- 7. 9, 43 43 47 47 4
4 85 72 (0.1 (0.1 LU PH,CL2,CCS.
24 -
52,6 7.B 1.0 7.9 43 43 46 49 3
6 93 70 (0.1 (0.1 LU PH,CL2,005 25
$1.9 = 7.6l 8.0
- 7. 9, 43 43 44 47 3
4 El 70 (0.1 (0.1 LU PH, Cl2, C0$
26 53.2
- 7. 7, 7.8.
7.7, 42 43 45 47 4
4 65 68 (0.1 (0.1 LU PH,CL2, DOS 27 53.5-7.3 7.8 - 7. 6 43 43 45 47 3
4 25 69 (0.1 (0.1 LU FH, CL?, C0!
26 58.1 7.5 -
7.7 7.6 43 43 46 47 3
4-25 70 (0.1 (0.1 LU. PH,CL2,0C5 29 51.1 7.5~
6.0 7.7 43 43 45 47 3
4 83 70 (0.1 (0.1 AM. FH CL2, 005 30 50.0 7.5' 7.8 7.6 43 43 46 47 3
4 80 70 (0.1 (0.1 AH FH,CL2,005 l
31:
$1.1
- 7. 4' 7.7
- 7. 6' 43 43 46 47 3
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1 TOTAL 1595.3 2J!.0, 241.5' 232.5 1355 1361 lit? 1496 112 137 2538 2135 (0.1 (0.1 l.
MIN 43.9 7.3 7.5 7.4 42 42 45 47 3
4 75 65 (0.1 (0.1 MAI
$3.6
- 7. 6 '
8.1 7.9 46 45 52 4
6 95 72 (0.1 (0.1 AVG -
$1.5 7.6 7.8 7.7 44 44 47 4S 4
4 62 69 (0.1 (0.1 i
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