ML20137B318

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NPDES Noncompliance Notification:On 970225,pH Lower Limit of 6.0 at Discharge & Dilution Structure Exceeded for Approx Ten Minutes.Caused by Inadvertent Discharge of Excess of Sodium Bisulfite.Will Review Drum Rinsing Process
ML20137B318
Person / Time
Site: Trojan File:Portland General Electric icon.png
Issue date: 03/17/1997
From: Quennoz S
PORTLAND GENERAL ELECTRIC CO.
To:
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
VPN-021-97, VPN-21-97, NUDOCS 9703210276
Download: ML20137B318 (7)
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Text

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m W WMMM Stephen M. Quennoz March 17,1997 Trojan Site Executive VPN-021-97 Trojan Nuclear Plant Docket 50-344 License NPF-1

i Regional Administrator Region IV US Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 400 Arlington, TX 76011-8064

Dear Sir:

Trojan Nuclear Plant Reoort of Violation of NPDES Permit In accordance with Facility Operating License NPF-1 for the Trojan Nuclear Plant, the Environmental Protection Plan (Non Radiological) Technical Specifications, Section 3.2, enclosed is a copy of the monthly report submitted to the Oregon Department of Environmental Quality (DEQ) in which a violation of the National Pollution and Discharge Effluent Systems (NPDES) Permit is identified. As discussed in the enclosed letter, the pH lower limit of 6.0 at the Discharge and Dilution Structure (D&DS-Outfall 001) was exceeded for approximately ten minutes (from 7:50 a.m. to 8:00 a.m.) on February 25,1997. The pH decreased to 5.87 due to the inadvertent discharge of an excess of sodium bisulfite. An investigation into the cause of this
event is occurring to prevent its recurrence. Because notification of another government agency (Oregon DEQ) was made, a four-hour report was made on February 25,1997, in accordance with 10 CFR 50.72(b)(2)(vi).

Sincerely, ALy %u %W

' S. M. Quennoz Dk Trojan Site Executive S

OcckobOO$b44 PDR , j l Enclosure g1W ~

c: Document Control Desk, US NRC M. T. Masnik, NRC, NRR j b]

R. A. Scarano, NRC, Region IV D. Stewart-Smith, OOE lEl,I$ElElElE,EE%R

! 71760 Columbia River Highway, Rainier, OR 97048 503/556-3713

, I

] -MM-17 97 08:56 FROM:ENVIR0tM34TAL 5834640527 TO:915035567002 PAGE: 02 l PordendGeneralBecMcCortsiersy j March 12,1997

ES- 131 -97 l OOV REL 09-1 1

TROJAN NPDES i

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I Oregon Department of Enyhoanwatal Qoalhy i

Northwat Regional Osca l 2020 SW Fourth Avenus l Sulse 400 l Portland OR 97201 t

tinvin ,n-l Pnciaanri are two copies of the NPDES report ibe the Trojan Nuclear Plant for February 199ry, Also I anela=ad are data requhed to be subunkled, in addition to ther on standard NPDES foons. The plant j did not operase during February aines k is per-ly cloosd.

1 Tbs Trojan Nuclear Plant encoeded the Wasse Dischares thnkmiana et ks NPDES penmit on

February 25,1997. The pH lower tirait of 6.0 at the Discharge and Diludon Senacture (DADS -

Outfall 001) was esesoded between 7:50 A.M. and 5:00 A.M. when a solution of sedimmi bisulfite )

1 was inadvertently syphoned fhome a drust laso tiis D&DS water,1bs addklon of this sodluss bianinen j

' soludou caused the pH to deny to 5.87. Conocdvs actions to ensure this activity dossa's bsppen  !

again laelada a revidw of the facident with gyroprints persommet and a neview of the madh== bisalete J

dnan rinsing process.  !

I If you have Waam, please coenam Tha Moore at (503) 464-8490.

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Dennis Norton, Manager l Enyhoesnestal Services i

Enclosures d

DNM/tman ec: David Stewart-Santh. DW

. Stephen Queanos, POE Bnaco Trout, PGE w/o i Tien Moore, PGE Lolita Carter. PGE 4

l un sw sewen seen potenrut ougmano4

_. . . _ _ _ _ _ _ . _ _ . - . . _ _ ~ . . . . _ .

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TROJAN NUCLEAR P'. . ANT MONTHLY NPDES DATA FEBRUARY 1997 f

I DISCHARGE AND DILUTION STRUCTURE i

EFFLUENT EFFLUENT COMPOSITE COMPOSITE RESIDUAL FLOW PH BORON DIFSOLVED CL2

  • I SOLIDS  :

DAY MOD MIN MAX AYO 4 1 (1.0) DAILY MAX 643 MAX >6.0 <9.0 ppm ppm AVO <0.1

  • I 3J 6.9 7.0 7.0 <0.1 <0.1 i 2 3.1 6.8 6.9 6.9 41 <0.1 l 3 3.1, 6.8 6.9 6.9 41 I

<0.1 4 3.0 6.1 6.8 6.7 <0.1 41 f 5 3.1 6.8 6.9 6.8 <0.1 <0.1 l 6 33 6.9 6.7 6.9 96 <0.1 <0.1 l

e. 7 33 6.9 7.0 7.0 <0.1 - 41  !

j 8 33 7.0 7.0 7.0 <0.1 41 i 9 3.1 7.0 7.0 7.0 <0.1 41 10 3.2 7.0 f

7.0 7.0 41 <0.1 1I 3.1 d.4

[

7.1 7.0 <0.1 41 _{

] 12 3.2 7.0 7.0 7.0 0.0490' .C.1 41' i 13 33 7.0 7.1 7.1 106 <0.1 41  !

14 3.2 7.0 7.1 7.1 <0.1 41 I 15 3.1 7.0 . 7.1 7.1 <0.1 41 (

) 16 2.9 7.1 7.1 7.1 <0.1 <0.1 17 6.2 63 7.1 6.9 <0.1 <0.1 l 18 3.1 7.1 7.2 7.2 <0.1 41 19 3.2 7.1 7.2 7.2 <0.1 41 20 3.4 6.9 7.2 7.1 109 <0.1 <0.1 I 21 3.4 7.1 7.1 7.1 41 41 22 3.5 7.1 7.1 7.1 <0.1 <0.1 I 23 3.6 7.1 7.1 7.1 41 41 24 3.6 7.2 7.2 7.2 <0.1 <0.1 l 25 '

3.2 5.9 7.2 6.8 <0.1 <0.1 .

26 3.0 7.2 7.2 7.2 <0.1 41 l 27 3.0 7.2 73 7.2 II8 <0.1 41 '

'Is 3.1 73 73 73 <0.1 <0.1 l

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..... .......... ....... .............. ......... ......... .............. 3 MIN 5.9 6.8 6.7 1 1

MAX 6.2 73 73 73 0.0490  !!8.0 <0.1 <0.1 AVO 0.0020 1073 Revmwed by- der-  !

(PAGE I OF 5) /

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