ML19323A484

Offsite Dose Estimates - Third & Fourth Quarters,1979.

ML19323A484
Person / Time
Site:	Beaver Valley
Issue date:	04/15/1980
From:	DUQUESNE LIGHT CO.
To:
Shared Package
ML19323A478	List: ML19323A477 ML19323A484
References
NUDOCS 8004210266
Download: ML19323A484 (2)

Text

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T DUQUESNE LIGHT COMPANY Beaver Valley Power Station Docket No. 50-334, License No. DPR-66 Semi-Annual Effluent Report Off-Site Dose Estimates - Third and Fourth Quarters, 1979 In accordance with requirements of Section 5.6.1.B of the Environmental Technical Specifications and Regulatory Guide 1.21, the off-site dose to humans from the gaseous and liquid radioactive effluents have been estimated.

Dose Models A. Airborne Effluents All doses as a result of Beaver Valley operation were calculated for gaseous pathways using NRC computer code GASPAR.

All gaseous effluent releases, including Auxiliary Building Ventilation, were included in dose assessments. The data obtained from the analyses required by the Technical Specifications, were used as input. Meteorological data collected by the Beaver Valley Power Station meteorology system was also used in input to GASPAR.

Except when more recent or specific data was available, all inputs were the same as used in the Beaver Valley Power Station Environmental Statements or in Regulatory Guide 1.109.

B. Liquid Effluents The radiation doses to man from liquid effluents were calculated using NRC computer code LADTAP.

All potentially radioactive liquid effluents, including steam generator blowdown, are released by batch mode after analysis by gamma spectrometry using a GeLi detector. The actual data from these analyses are tabulated and used as the input term for sources in LADTAP. The maximum individual for liquid pathways is located at Midland. Except when more recent or specific data for the period is available, all other input to LADIAP are obtained from the Beaver Valley Power Station Environmental Statement or Regulatory Guide 1.109. Pathways, which were evaluated, are drinking water, fish consumption, and shoreline recreation.

800.4210266

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DUQUESNE LIGHT COMPANY Beaver Valley Power Station Docket No. 50-334, License No. DPR-66 Semi-Annual Effluent Report Off-Site Dose Estimates - Third and Fourth Quarters, 1979

SUMMARY

OF RESULTS Airborne Effluents Maximum Individual Dose Third Ouarter Fourth Quarter Whole Body SW l.5 mi. 8.30E-5 mrem 6.7E-3 mrem NE 0.32 mi. 6.00E-4 mrem 5.50E-2 mrem Beta Air Dose SW 1.5 mi.* 4.85E-5 mrad 3.0E-4 mrad Gamma Air Dose SW 1.5 mi.* 1.63E-5 mrad 9.84E-5 mrad All other organs less than the whole body dose.

Population Dose 0 to 50 miles Whole Body 3.6E-3 man-rem 2.5E-1 man-rem Liouid Effluents Maximum Individual Dose Third Quarter Fourth quarter Whole Body (Infant) 9.94E-4 mrem 1.07E-3 mrem Drinking pathway All other organs less than the whole body dese.

Popul'ation Dose O to 50 miles Whole Body 7.19E-3 man-rem 7.69E-3 man-rem Thyroid 6.88E-3 man-rism 7.24E-3 man-rem GI-LLI 8.13E-3 man-ram 8.03E-3 man-rem

Conclusions:

The operation of Beaver Valley Power Station, Unit 1, has resulted in an insignificant incremental dose to that which area residents already receive as a result of natural background and this dose will constitute no meaningful risk to be balanced aa,ainst the benefits of the plant.

• Difference in lccation attributible to releases via elevated pathway only during report period, i.e., no ground releases.

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