ML19320A438
| ML19320A438 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 04/17/1975 |
| From: | Phillips J ARKANSAS POWER & LIGHT CO. |
| To: | Anthony Giambusso Office of Nuclear Reactor Regulation |
| References | |
| 4454, NUDOCS 8005070644 | |
| Download: ML19320A438 (5) | |
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- a ARK ANS AS POWER S LIGHT COMPANY DTH G LOUISlANA GT AEETS. LITTLE AOCK. A AK ANGAS 722O3 e (SOU 372-4311 April 17,1975 5.
Os tir. A. Giambusso, Director Division of Reactor Licensing U. S. Nuc1 car Regulatory Commission h'ashington, D. C.
20555 Subj ect: Arkansas Power G Light Company Arkansas Nuclear One-Unit 1 Docket No. 50-313 License No. DPR-51 Environmental Technical Specifications
Dear Mr. Giambusso:
Our Ictter of April 11, 1975, transmitted certain proposed changes and additions to the Arkansas Nucicar One-Unit 1 Environmental Technical Specifications. Our submittal of changed page 4-12 contained an error which the revised page 4-12, attached, corrects.
The newly required monthly summaries of impingements negate the need for a semiannual summary. Therefore, the attached page 4-12 deletes the requirements for a semiannual summary.
Our submittal of changed page 4-11 also contained an error which the revised page 4-11, attached, corrects. Due to the large ratio of trash impinged to fish impinged during certain seasons of the year we have included the weight of the trash in the criteria to determine when to subsampic, and deleted the size of the subsampics.
Details of methods for determining the subrample size during large trash impingements and during other times will be included in approved plant procedures.
Your early comments or responses are requested.
Very truly yours, c i' >,
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J. D. Phillips j
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Senior Vice President JDP:lt
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r STATE OF ARKANSAS
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SS COUNTY OF PULASKI
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J. D. Phillips, being duly sworn, states that he is a Senior Vice President of Arka.'sas Power 6 Light Company; that he is authorized on the part of said Company to sign and file with the Nuclear Regulatory Commission this Supplementary Information; that he has read all of the statements made and matters set forth therein are true and correct to the best of his knowledge, information and belief.
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V' J. D. Phillips SUBSCRIBED AND SWORN 'ID before me, a Notary Public in and for the County and State above named this /1b day of
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e Notary Public My Commission Expires:
March 1, 1978
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4-11 Frequencies of sampling were chosen to obtain a trend of aquatic life in the area.
Most fish surveys are set up to be conducted in the summer because the fish are more plentiful at this time of year.
It is felt that more frequent sampling of the organisms would produce repetitive data. However, less frequent sampling might yield erratic data from which no trend could be detected.
The' data.will be evaluated in relation to preoperational data obtained by APGL, UALR, Ark. Tech., and various governmental agencies.
By comparing preoperational data with' postoperational data, changes in the environment can be detected.- It is felt that in this way effects on the aquatic life by ANO can be monitored and controlled.
(2) Impingement of Organisms Objective:
-Tie objective is to monitor those fish impinged on the intake screens to permit a quantitative assessment of impingement impacts. Potential impacts of concern are effects on the-fishery resource and dissolved oxygen resource of Lake Dardanelle.
If these impacts are significant, appropriate state and federal agencies responsible for fisheries shall be consulted, and the necessary modifications to the intake system shall be implemented to satisfactorily reduce these
-impacts.
Specification Fish trapped on all of the intake screens will be sluiced to
. a collection basket where they will be identified, counted and weighed following a twenty four (24) hour sampling period 4
twice each _ week.
If the weight of fish and trash impinged on any given sampling day exceeds 150 pounds, two replicate sub-samples will be taken and their average used for extrapolation 4
to determine species data for the total weight impinged.
Length and weight of each fish in a subsample will be determined for up to 25 fish in each specie. If the total number of fish in i
a subsample in a particular specie is >25 but <100, 25% of the number in that specie will have their length and weight measured.
'If ' the number of fish in a subsample in a particular specie is greater than 100, 25 fish plus 1% of N-100 (where N is the number _of fish in that specie) will havc their length and weight mecsured. Total biomass of all fish impit.ged will be determined regardless of the number impinged.
Tabulations of this data will
'be made.
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4-12
' Fish may be disposed of through the trash grinder and discharged 4
into the' outfall as long as the dissolved oxygen, as measured per Specification 4.1.1.a. (3) '(c), is 5.5 mg/l or greater.
When grinding operations 'are discontinued as a result of the dissolved oxygen measurements taken per Specification 4.1.1.a.(3) (c), grind-ing will. not be resumed until those measurements read 6.0 mg/l or higher.
Repor* ing Requirements:
Monthly tabulations of quantity and weight by species for each 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> sample will be reported to the Nuclear Regulatory Commission, Office of Inspection 6 Enforcement, regional office.
Bases The purpose of this program is to permit accomplishment of the specification objective.
Surveillance frequency is based on previous surveillance data at Arkansas Nuclear One indicating that twice per week sampling provides essentially the same numbers as 3 or S times per week sampling.
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. 'Ihe numbers methodology for length and weight determinations is a fairly standard practice in aquatic biology. 'Ihe limits on fish grinding operations are based on state water quality regulations of a minimum dissolved oxygen level of 5.0 mg/l at 5 ft. or
.1/2 the total depth, whichever is less, except as a result of natural causes.
(3)- Entrainment of Plankton, Eggs and Larval Forms Objective:
The purpose of the entrainment survey is to determine the thermal and mechanical effects of the cooling water system on the various kinds and quantities of larvae, eggs, and plankton taken into the plant water system.
Specification
' Biological samples (organisms) of bottom samples and water samples were'taken at 6-month intervals prior to plant operation and shall be taken at one-month intervals after operation at the intake.
and discharge locations.
Pelagic larval fishes shall be sampled
- by. trawling with 'a fish larval net also in-the intake and dis-
-charge areas.-
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FROM: Arkansas Power & Light DATE OF DOC DATE REC'D LTR TWX RPT OTHER Littic Rock, Ark 4-17-75 4-23-75 XXXX ORIG CC OTHER SENT AEC PDR_
vv 1 D Ph4114m XX one signed SENT LOCAL PDR TO:
Mr ciambusso CLASS UNCLASS PROPINFO INPUT NO CYS REC'D DOCKET NO:
1 50-313 XXXXXX ENCLOSURES:
DESCRIPTION:
' orrections to their Enviro Tech Specs Change C
the following:
Ltr notarized 4-17-75....tran Request of 4-11-75....with regard to impingemo reports....(40 cys enc 1 rec'd)
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