ML20151V947

Annual Environ Operating Rept for 1987

ML20151V947
Person / Time
Site:	Seabrook
Issue date:	12/31/1987
From:	PUBLIC SERVICE CO. OF NEW HAMPSHIRE
To:
Shared Package
ML20151L940	List: ML20151L937 ML20151L977 ML20151L992 ML20151M109 ML20151V947
References
NUDOCS 8805030253
Download: ML20151V947 (3)

Text

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ENCLOSURE TO NYN-88053 SEABROOK STATION ANNUAL ENVIRONMENTAL OPERATING REPORT I JANUARY 1, 1987 TO DECEMBER 31, 1987

1. Preoperational ProRram The Preoperational Environmental Studies Program at Seabrook Station spans the period from 1975 to date. Attachment 1 to this enclosure is Technical Report XVIII-II which summarizes environmental studies conducted since 1975 and provides a comparison to the 1986 monitoring season. A swnmarization report for 1987 is not yet available but will be forwarded as part of the 1988 submittal.

2. Environmental Protection Plan Activities for Repor:ing Period Aquatic Monitoring Attachments two and three to this enclosure are studies that were completed  ;

this Reporting Period. The first study, ' Determination of Neoplasia in Soft-Shell 01ams Mya arenaria Near the Seabrook Nuclear Plant," was done to document the prevalence of neoplasia in soft-shell clams near Seabrook Station. The other report, "Halogenated Hydrocarbon Production and the .

Potential of Bioaccumule. tion at Seabrook Station " was done as part of the Chlorine Minimization Program (CMP) outlined in the National Pollutant  ;

Discharge Elimination System (NPDES) Permit.

Terrestrial Monitoring Not Applicable 1

Noise Monitoring Not Applicable

3. EPP Non-Compliances and Corrective Actions There were 33 exceptions noted and reported in the Seabrook Station Discharge i Monitoring Reports (DMRs) for the period (Jan. - Dec. 1987). A sumnary description of those exceedances is provided below. The number in parenthesis indicates the number of exceedances reported each month.

I EXCEEDANCE COMMENTS JANUARY j Coliform (2) Poor chlorine contact due to baffle 'nfiguration in chamber.1 1

o EXCEEDANCE C0_MMENTS FEBRUARY Coliform (2) Poorchlorigecontactdue'tobaffleconfiguration in chamber MARCH Glycol (2) Discharge flowrate exceeded permit requirements.

Coliform (2) Poorchlorigecontactduetobaffleconfiguration in chamber.

APRIL Turbidity (5) Snow melt and storm water run off following heavy precipitation.

Coliform (2) Poorchlorigecontactduetobaffleconfiguration in chamber Iron (2) Unanticipated discharge from chemical cleaning pond. i MAY_

l Turbidity (2) Stormwater runoff. l TSS (1) Water hold up to reduce turbidity resulted in an algal bloom.

Glycol (1) Temporary glycol leak from a building heating system.

pH (1) Presence of annonia in auxiliary boiler blowdown which discharges to oil / water separation vault no. 2.

JUNE TSS (1) Algal bloom.

Glycol (1) Temporary leak from an exterior building heating i system.

Coliform (2) Poorchlorigecontactduetobaffleconfiguration in chamber.

pH (1) Algal bloom in settling pond.

pH (1) Low pH due to flush down of oil / water separator vault drain lines.

EXCEEDANCE COMHENTS JULY None AUGUST pH (1) Drain down of auxiliary boiler.

SEPTEMBER pH (1) Rainwaterdragnagethroughflyashinauxiliary boiler stack.

OCTOBER Coliform (2) Upset condition due to lagoon aeration tube replacement.

NOVEMBER Boron (1) Discharge of wasts test tank at too high a rate.3 DECEMBER None r

FOOTNOTES 1

Dye testing of the contact chamber revealed short-circuit flows in the chlorine contact chamber. The baffle configuration has been  ;

redesigned and the existing baffles have been replaced.

2 The auxiliary boiler stack has been inspected and several thousand pounds of fly ash have been removed. Auxiliary boiler fly ash removal has been scheduled as a repetitive task.

3 Instrumentation was not able to adequately monitor tank flows at the low flow rates experienced. The procedure for waste tank discharges l has been modified to better control those discharges.

4. Changes to Plant Design or Operation No changes to plant design or operation that involved an unreviewed j environmental question occurred during this reporting period. j

5. Non-routine Reports There were no non-routine reports generated during this reporting period.

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