ML19326C930

Tech Spec Change Request Re ETS 4.1.2a(3),deleting Sampling in Dischange Canal for Determining Ichthyoplanton

ML19326C930
Person / Time
Site:	Arkansas Nuclear
Issue date:	12/12/1975
From:	ARKANSAS POWER & LIGHT CO.
To:
Shared Package
ML19326C922	List: ML19326C921 ML19326C930
References
NUDOCS 8004290559
Download: ML19326C930 (2)

Text

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Fish shall be disposed of in a manner consistent with U. S. Environment al Protection Agency, Arkansas Department of Pollution Control and Ecology and Arkansas Game and Fish Commission guidelines.

Reporting Requirement Monthly results from diis study shall be submitted to the NRC, Division of Reactor Licensing, no later than 30 days after the end of the reporting month. The reports shall contain the following information:

the date of the sample, the species co11ceted, the number or estimated number impinged in 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> for each species, the modal length (in nm) for each species, the maximum length (in mm) for each species, the modal weight (in g) for cach species, and the number of pun)s operating during each sampic i

collection.

A summary of the impingement results shall be included in the report required by Specification 5.6.1.

Bases The purpose of this program is to permit accomplishment of the specifi-cation objective.

Surveillance frequency is based on previous surveil-lance data at Arkansas Nuclear One indicating large impingements during the p' iod October through March. Subsampling is done to reduce the sampling effort and replicates are taken to reduce subsampling error.

Length and weight determinations are made to determine impingement selectivity.

(3) Entrainment of Ichthyoplankton 2

Objective The objective of the entrainment study is to determine the effects of opera-tion of the Circulating Water System on the ichthyoplankton.

Specification A sampling progrnm shall be impicmented to determine estimated numbers of ichthyoplankton passing through the Circulating Water System.

It shall be assumed that those organisms passing through the system undergo a 100% mort-ality.

Intake samples shall be taken in the intake canal.

Physiochemical parameters to be monitored at sampling shall include water temperature, dis-solved oxygen and pli.

Ichthyoplankton shall be sampled monthly during the months of April througn September.

Sampics shall be taken over 24-hour periods at eight-hour intervals.

The sampics shall be taken at surface, mid-depth, and near bottom at the intake by a metered plankton net. As an alternative, a high capacity I

pump sampler shall be used to take samples at surface, mid-depth, and near bottom.

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8004 290 7D l

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g 4-12a Specimens collected shall be identified to the lowest possible taxonomic level and densities shall be calculated.

Reporting Requirement Report levels shall be developed from the data collected at the conclusion of the first year study. A sunmary of the entrainment study shall be included in the report required by Specification 5.6.1.

Bases

%is stud) and subsequent analysis of the results will aid in determining

-the impact on the Fishery of Dardanelle Reservoir.

Losses in recruitment to the reservoir may or may not be significant.

This study sho' Id provide a pathway for making such an assessment.

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