U-602741, Annual Environ Operating Rept for 1996

Annual Environ Operating Rept for 1996

ML20140F283
Person / Time
Site:	Clinton
Issue date:	12/31/1996
From:	Phares R ILLINOIS POWER CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
U-602741, NUDOCS 9705020219
Download: ML20140F283 (5)

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• Ilhnois Power Company Chnton Power Station P.o. Box 678 Clinton. IL 61727 Tel 217 935-8881 ggg U402741 April 29, 1997 Docket No. 50-461 Document Control Desk Nuclear Regulatory Commission l Washington, D.C. 20555 j l

Subject:

Clinton Power Station I Annual Environmental Operating Report l 3

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Dear Sir:

In accordance with Appendix B to the Clinton Power Station (CPS) Technical Specifications, Clinton Power Station's Environmental Protection Plan (EPP), Illinois Power (IP)is submitting the Annual Environmental Operating Report. This report covers the period of January 1,1996, through December 31,1996.

Sincerely yours,.

4 4 Richard F. Phares Assistant to the Vice President

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Attachment ec: NRC Clinton Licensing Project Manager NRC Resident Office, V-690 () /

Regional Administrator, Region III, USNRC 9705020219 961231 PDR R ADOCK 05000461 PDR tL'UU67

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Annual Environmental Operating Report l

The Environmental Protection Plan (EPP) for Clinton Power Station (CPS) requires that the Annual Environmental Operating Report include: 1 (A) A list of EPP non-compliances and the corrective actions taken to remedy them.

(B) A list of all changes in station design or operation, tests, and experiments made in accordance with subsection 3.1 of the EPP which involved a potentially significant unreviewed environmental issue.

(C) A list of non-routine reports submitted in accordance with subsection 5.4.2 of the EPP.

(D) Any results and/or assessments for the environmental monitoring programs described in subsection 2.0 of the EPP which were submitted to the respective regulatory agencies during the annual reporting period.

The following provides Illinois Power's response to each listed item.

A. A list of EPP non-compliances and the corrective actions taken to remedy them:

1. A sample collected on January 24,1996, at the Extended Aeration Sewage Treatment Plant (Outfall 002a) contained 76 mg/l Total Suspended Solids (TSS). The Daily Maximum permit limit for this parameter is 60 mg/1. A subsequent sample collected on January 27, 1996, was within limits and no other anomalies were detected for the remainder of the month.

Corrective Action: i An investigation into the apparent cause of the non-compliance was conducted. It was believed to be caused by increasing level in the equalization tank which caused higher resistance to the agitation air 4 flow. This resulted in more air flow to the plant aeration tanks, and the formation of pin floc which was subsequently carried over to the J cffluent. This non-compliance was considered to be an isolated event and no further actions were deemed necessary.  ;

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2. A sample was taken from outfall 005 (Diesel Generator Oil-Water i Separator) on May 27,1996, exceeded the daily maximum value for oil {

and grease of20 mg/1. The value obtained was 23 mg/1. A sample l taken on June 4,1996, before any remedial actions were implemented, indicated a value of 2.7 mg/l for this outfall.

l Corrective Action: 1 As a follow-up to this non-compliance, CPS inspected the separator.

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Site personnel verified the oil separator oil level was not great enough to j cause breakthrough. A new type of absorbent material was applied to '

the effluent area. This is viewed as an isolated incident.

3. On August 21,1996, chlorinated effluent was allowed to return to the lake from the Shutdown Service Water (SX) system (Outfall 007) without being treated. Part of the chlorinated Service Water (WS) system flow is bypassed to the SX system and must be dechlorinated prior to being discharged to Lake Clinton. Due to improper maintenance performed by a vendor representative, there was remote indication that the dechlorination pumps in the SX Egress Building (part of the Raw Water Treatment system) were pumping when in actuality they were not. This resulted in failure to dechlorinate for approximately -

four hours (approximately 1230 to 1630). It should be noted that all of  ;

the weekly TRC compliance samples for Outfall 007 were less than the l minimum detection limit for the analytical instrument (0.05 mg/l).

Corrective Action: l In the future, whenever an evolution is performed which could affect the  !

operability of the dechlorination pumps, a physical check of the pumps will be conducted and the pumps will either be verified to be pumping or will be started in the manual mode.

4. A sample collected on September 11,1996, at the effluent of Division III of the Shutdown Service Water (SX) System (Outfall 007) contained 0.3 mg/l total residue chlorine (TRC). The permit limit for this parameter is 0.05 mg/1.

Corrective Action: '

1. Operate the Division 3 sodium bisulfite metering pump at 100% of capacity whenever SX Division 3 flows are above 100 gpm. This change has been implemented.

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2. Change the control scheme to provide for automatic shutdown of the sodium hypochlorite system whenever divisional SX flows exceed a predetermined setpoint. This change is in the -

developmental stage.

5. and 6. Two noncompliances were reported for the month ofNovember 1996.

'. On November 13,1996, a sample of the Extended Aeration Sewage Treatment Plant (STP) effluent (Outfall 002a) contained a concentration

of 800 mg/l Total Suspended Solids (TSS) (Daily Maximum permit limit 60 mg/l). This result caused exceedances of the TSS 30-Day Average concentration permit limit of 30 mg/l (197 mg/l), the TSS Daily

Maximum load limit of 46.4 lbs/ day (207 lbs/ day), and the TSS 30-Day i Average load limit of 23.2 lbs/ day (50 lbs/ day). The sample also contained a concentration of 100 mg/l 5-day Biochemical Oxygen

'. Demand (BODS )(Daily Maximum permit limit 60 mg/l). This result 4'

caused the BOD5 30-Day Average concentration limit of 30 mg/l to be exceeded (42 mg/l). The noncompliances were thought to have been 1

caused by the reduction in the temperature of the influent waste water

caused by colder weather coupled with the over-aeration of the aeration tanks, which resulted in the production ofpin floc. Also, Clinton Power Station was in the midst of a refueling outage, with a higher than normal 4

site population contributing to increased influent waste water flow rates.

These higher flow rates make it more likely that solids carryover will i occur when poorly settling solids, such as pin floc, are produced.

4 Corrective Action:

The STP operators have been instructed in the maintenance of the proper aeration flow rate for colder conditions.

1 l B. A list of all changes in station design or operation, tests, and experiments made in accordance with subsection 3.1 of the EPP which involved a potentially significant unreviewed environmentalissue:

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There were no changes in station design or operation, tests, and experiments made

in accordance with subsection 3.1 of the EPP which involved a potentially sigmficant unreviewed environmental issue.

C. A list of no_n-routine reports to be submitted in accordance with subsection 5.4.2 of the EPP:

There were no non-routine reports submitted in accordance with subsection 5.4.2 i of the EPP, I

f Attachment 1 to U-602741 Page 4 of 4 D. Any results and/or assessments for the environmental monitoring programs described in subsection 2.0 of the EPP which were submitted to the respective i regulatory agencies during the annual reporting period:

There were no results and/or assessments submitted to regulatory agencies with respect to environmental monitoring programs described in subsection 2.0.

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