ML20215L228

Environ Protection Plan 1986,Fog Monitoring Status Rept

ML20215L228
Person / Time
Site:	Catawba
Issue date:	12/31/1986
From:	DUKE POWER CO.
To:
Shared Package
ML20215K614	List: ML20215K611 ML20215K630 ML20215K660 ML20215L211 ML20215L219 ML20215L228
References
NUDOCS 8705120143
Download: ML20215L228 (4)

Text

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CATAWBA NUCLEAR STATION ENVIRONMENTAL PROTECTION PLAN 1986-F0G' MONITORING STATUS REPORT l

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Attachment 4L - FOC MONITORING Fog Study Plan As part of the licensing process of the Catawba Nuclear Station, the NRC has required that a study be performed to assess the effects of the station heat dissipation system on the intensity and frequency of ground fog. Emphasis is on identifying measurable changes in fog characteristics which may have potential adverse economic and/or aesthetic impacts on Lake Wylie and the surrounding com-munities. The study is designed to address the impact of increased surface water temperatures from plant discharges; increased atmospheric moisture from vapor due to cooling tower plume downwash, plume dispersion, or drif t evapora-tion; and increased fog condensation nuclei from cooling tower drift.

The preoperational phase of the study is completed and consists of two years of data (August 10, 1977 - August 9,1979). The data includes visiometer and sur-face water temperature measurements conducted at the following two locations:

Location 1, about 800 m north of the cooling towers'near the plant cooling water intake; and Location 2, about 250 m south of the' cooling towers near the plant cooling water discharge. Daily morning fog observations at Location 2 taken by trained security persont.el were taken during the sane time period. The obser-vations compare conditions at Location 2 to prevailing conditions on adjacent

- land and water. Trained personnel at Wylie Hydro Station (located about 6 km east-southeast of the plant) similarly described visibility conditions over the lake and land areas visible from the dam. When atmospheric conditions were con-

.ducive to the formation of steam fog, Duke Power Company Meteorologists conduct-ed qualitative observatior.s of the horizontal and vertical extent of the fog, as l well as transport of the fog off the lake. Observation locations included visio-meter Locations 1 and 2, Wylie Hydro Station, Ebenezer Boat Landing (located approximately 4 km southeast of the plant), I-77 at the Catawba River Crossing, Tega Cay residential comunity (3 km southeast of the plant), the municipal air-i port (located about 8 km south of the plant) and a nearby firetower giving a l total view of the lake. The extent of the fog situation can be assessed at all j -ccmmunities on Lake Wylie from these locations including the community 1.6 km

j. east of the plant.

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! The operational phase of the study will consist of the same components as the preoperational program. Visiometer and surface water temperature measurements began September 1,1985 at the same locations. Daily morning fog observations I

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Attachment 4 - FOG MONITORING b'y Catawba security and Wylie Hydro personnel began September 1,1984 using the same criteria and observation locations as the preoperational study. In addi-tion, a cooling tower plume questionnaire is filled out by Catawba security during the fog observations when the towers are operational. The plume ques-tionnaire is designed to document the characteristics of the cooling tower plume itself in terms 'of visibility, drift and icing on surrounding public and private

-lands. Qualitative observations by company meteorologists will continue at the same locations as in the preocerational study when foo conditioris warrant.

The operational monitoring program will conclude one year after startup and con-tinued operation of Unit 2. At the conclusion of the monitoring period a final report shall be submitted as part of the Annual Environmental Operating Report.

The report will include:

- a complete description of the Catawba Fog Study Program noting similarities and differences between the operational and preoperational programs; s

- quantitative and qualitative results;

- interpretative analyses of the frequency and intensity of ground fog induced by plant operation, particularly at the nearby residential community and municipal airport, using comparisons of the results of the preoperational_ and operational monitoring programs; and

.- a discussion of the need for continued monitoring and/or mitigating actions to lessen the at=ospheric impac't of plant operation.

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MODIMCATIONDATE: 1 C3 ' e Bu of Water Po t r( Control A. EfflUEllT LilllTAT!0ris All0 M0ftlTORING REQUIREtt[t!TS During the period beginning on the effective date and lasting through the expiration date the pemittee is authorized to discharge from outfall(s) serial number (s)004: Radwaste System Discharge Such discharge shall be limited and monitored by the permittee as specified below:

Ef fluent Characteristics Discharge Limitations Monitoring Requirements

• Other Units (Specify)

Heasurement Sample Monthly hvg. Daily . Max. Frequency Type ,

Oil and Grease 15 mg/l 20 mg/l 1/ year Grab Total Suspended Solids 30 mg/l 100 mg/l 1/ year Grab Boron *

• 1/ quarter 30 Day Composite

• Record results.

This ' discharge is regulated by the United States Nuclear Regulatory Commission (NRC 10 CFR 50 Appendix I) and is monitored and reported to the NRC. However, in the event that chemical metals cleaning wastes as defined in 40 CFR Part 423 are discharged through this serial number, treatment shall be provided to assure that discharges are in compliance with requirements of Part 423.13.

Based on a Design of .140 MGD. y;yg Samples taken in compliance with the monitoring requirements specified above shall be taken at the following location (s): Wastewater treatment system prior to mixing with any other waste UE r* #

stream. Boron shall be sampled from the radiological sample location. g

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