ML19289C644

Requests NRC Approval of Study to Investigate Effects of Condenser Cooling Water Temp Change Greater than 10 F on Receiving Water Traits.Requests License Amend for Max Temp Change of 12 F.Supporting Documentation Encl

ML19289C644
Person / Time
Site:	Calvert Cliffs
Issue date:	01/15/1979
From:	Lundvall A BALTIMORE GAS & ELECTRIC CO.
To:	Harold Denton Office of Nuclear Reactor Regulation
References
NUDOCS 7901220053
Download: ML19289C644 (46)

Text

BALTIMORE GAS AN D ELECTRIC COMPANY GAS AN D ELECTRIC BUILDING B ALTI M O R E, M A RYLA N D 212O3 ART HUR E. LUN OVALL,JR.

vic t Pat s.oc ~ r S u psu, v "r.

Harold R. Denton, Director Office of Iluelear Peactor ?cm11ation U

O. ?iuclear Perulatory Corrinnion Washincton, D. C.

P0555 Oubject: Calvert Cliffs I!uelcar Power Plant Units ?:os. I h 2, Dockets Tios. 50-317 & 50-318 Oneratine Licence !!ns. DPR-53, DPR-CO Fubmittal of Snecial Field Studies Procran for Anproval and Pecuent for Arendment to Oneratinc Licencen DPR-51 and DPR 60

Dear Ur. Denton:

With reference to nectior h ? of the Pnvironmental Technical Specificationn for Calvert Cliffs I?ur] car Power Plant (Appendix 3 of the above onerating licences), 3'titircre Gan and Flectric Corrany hereby requents IIRC arnroval o# a study nlan (attachment 1) to inventicate the ef fects of condenner cooling water AT creater than 10 F on the nhysical and biologic't]

charatterintien of the receivinc water in the vicinity of the vlnnt.

In conjunction with this recuent, Faltinore Gas and Electric also requesta

?!PC annroval to operate both units with a e xinun AT of ]? F for the duration of this study (anproxinately two years).

Ctate of "aryland Unter Cuality Perulationn (CC"AR 03.05 0h.13) establith nroceduren for deternininr compliance of thernal discharran with "aryland Water Ou'ility Standardn and for neetinr the requirements of ceeion 31 01 of the Clean Watar Act.

In accordance with these uroceduren, Baltinore Gan nnd I'lectric Company has received annraval fron the ?!aryland Water Penources Adninistration (WRA) to test connlitnce of ti.e thernal dincharme at Calvert Cliffs while operatine both unf cc at a AT in excess cf 10 F vith a naxinun linit of IP F (attachment ?).

Since these ntudice vill require operation of Calvert Cliffs in excess of 2 0 P for nore than the 100 hour0.00116 days <br />0.0278 hours <br />1.653439e-4 weeks <br />3.805e-5 months <br /> rer year limitation in crecification h.2, it in recuented that thic limit-ation be cuspandad until a cecision rerardinc this cubject in ritde by the WA.

Pursuant to 10 CFR Part 170 paracranh 170.?2, we have deternined that, if an anendnent to our operating licensos in required for this request, the apnropriate fee is $h,h00.00 (Clann III and Clano I).

A check for that anount is enclosed herewith.

N

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0 6 O

@A L 790122005~5

1. p-e S'i

3 Page 2 Since it is desirable to start these studies as soon as possible, ve would be pleased to neet with you or provide any other information you may require to aid you in conducting a prompt review of this request.

BALTIMCRE GAS & F" TRIC COMPAITY By W

A'. T. Lundval, Jr.

/

Vice Presidenv - Sunply STATE OF ?MRYLAND

- TO WIT CITY OF BALT!"0RE Mr. A. E. Lundvall, Jr. heing duly sworn states that he is Vice President of the Baltimore Gas ani Electric Company, a corporation of the State of Maryland: that he executed the foregoing Amendment for the pur-noses therein set forth: that the statements made in said Amendment are true and correct to the best of his knowledge, information and belief-rind that he was authorized to execute the Amendment on behalf of said corpoti t,I o n.

WITNESS My Hand and Notarial Seal, n

s'

/

LC J

LLx1x s Notary Public

.rs i I

([f/

/r /

My Conmission expires:

Attachnent

Enclosure:

BG?<E Check No. Ed72516 cc - J. A. Biddison, Esquire C. F. Trowbridre, Paquire Mr. E. L. Conner, Jr. - NRC Mr. W. Lavrence Pamsey, WRA

N Attnehment 2 e[

J3 i if D h q s) g;Y N

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J AMES 8. COULTE R LOUIS N. PHIPPS, JR.

SECRETARY STATE OF MARYL AND DEpuT V SECRET ARY DEPARTMENT OF NAT!JR AL RESOURCES TAWES STATE OFFICE BUILDING ANN A POLIS 21401 301-269-2255 January 16, 1979 Mr. Arthur E.

Lundvall, Jr.

Vice-President Baltimore Gas & Electric Company Gas & Electric Building Baltimore, Maryland 21203 RE: Calvert Cliffs Thermal Studies

Dear Mr. Lundvall:

Agency staff has completed its review of your study proposal for the Calvert Cliffs Nuclear Power Plant in accordance with COMAR 08.05.04.13.

The essential elements of their review has been forwarded to your staff under separate cover.

Based upon that review, we hereby approve the plan as submitted on November 15, 1978, and amended on January 8 and 10, 1979.

This study approval extends to allowing the Calvert Cliffs Plant to operate at a maximur tempencure elevation of 12 F through the main cooling system for the duration of the study period.

This approval is conditional on continued cooperation between our respective staffs and data available at this time. Should, at anytime, the results of our evaluation of data collected indicate adverse effects to natural water quality are occurring or are about to occur, you will be required to return to normal permit requirements.

Sincerely, JgM w

erbert M. Sachs Director of Operations HMS:mw

ATD41 FHA 16NT (l (44 PAcds)

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l THE ACADEMY OF NATURAL SCIENCES OF PHILADELPMM

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BENED]CT ESTUARINE RESEARCH LABORATORY

'Y Benede, Mar;1:nd 20612

• Telephone (301) 274 3134 January 10, 1979 Mr. W.

Lawrence Ramsey Water Permits Division Water Resources Administration Department of Natural Resources Tawes State Office Building Annapolis, Maryland 21404 c

Dear Mr. Ramsey:

We wculd like to request that the following changes be cade in the "Entrainment" portion of the revised Calvert Cliffs Study Plan submitted to you on 9 December 1978; (1)

Page 3 - eliminate the last sentence which Iegins on page 3 with "These estimates..." and concludes on page 4 with

"...(e.g.

Spier et al. 1977)".

Replace with "These estimates will be supplemented and improved on by results obtainad from the Calvert Cliffs shore seining program (Hixson 1978) and by information on the distribution and abundance of RIS available in the scientific literature.

Maryland DNR Fisheries Administration and NOAA fisheries statistics will be used to provide additional information on the abundance of spot (L. = ant.huru s). "

2)

Page 4 - between the end of the last paragraph on page 4 and the beginning of the first paragraph on page 5, the following new paragraph should be inserted: "The results of this program will be used to estimate the effects of plume entrainment on fish populations by comparing the abundance, size and composition of fish taken in the plume during sampling at the Plant Site Station with those of fish collected at the Kenwood Beach and Rocky Point Stations."

(3)

Page 12 - eliminate the last two sentencer in the first

'aragraph on this page and replace with "The estinates of the size of adult populations and their potential spawn Rc sc=

hl.' fu:aumlEdxcron

~

4 Mr. h'. Lawrence Ramsey Page 2 - January 10, 1979 will be necessarily imprecise since in general it is simply not known what constitutes the breeding population of most species occurring in the Bay.

Thus, even though quantitative analyses of the population consequences of plant cropping are desirable, the available data will allow only qualitative comparisons.

However, these qualitative comparisons of the abundance of entrained RIS larvae and juveniles versus cetimated population reproduction will permit general co,.clusions to be drawn concerning the possibility that Calvert Cliffs is a nursery area of consequence.

A conclusion that this area is a potentially important spawning ground would warrant more detailed analyses of the population dynamics of the species involved."

Picase call me if you have further con.ments on the study plan.

Sincerely yours,

}!.

s.] l l ~L Kenneth L. Heck, Jr.

Assistant Curator KLH : gs..

cc:

Dr.

R. Roig Dr.

E.

I. Bauereis/

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Y F-FOUNDED IN 1812 REsEARCH MUSEUM EDUCATION PHILADELPHIA January 5,1979 Dr. Elizabeth Bauereis Electrical Engineering Department Baltimore Gas and Electric Company Gas and Electric Building Baltimore, MD 21203

Dear Betty:

I have contacted both John Edinger and Harry Carter for their comments regarding questions which were raised by Dr. Roig at our meeting on December 20, 1978. The following points reflect our thinking to date.

Please refer to Randy Roig's memorandum to L. Ramsey (December 1,1978).

Paragraph 2): One vertical string of current meters will be positioned approximately 1.5 km offshore to avoid plant induced current effects.

Three meters will be deployed at different depths. The rationale for meter positioning is confirmed by examination of Pritchard's 1977 study.

Paragraphs 3, 4, 5): The field crews will conduct five day field efforts in an attempt to complete 8-10 mappings of the plume during each study perio?.. Details regarding boat tracks, monitoring depths and exact sampling regions will not be decided on until one week prior to sampling.

Every effort will be made to eliminate open regions in the selected track patterns.

Paragraph 6): Elapsed time goal for each mapping will be two hours or less.

Dr. Roig indicated it would be most helpful to have a progress report available between the time of the spring and summer studies. Although the spring data will not be in a presentable form by the time of the summer sur-vey, a letter report sumarizing the success and/or problems encountered during the first study will be supplied.

Dr. Carter has indicated it will be possible to assess the coverage of the plume during spring mappings prior to the summer field work.

THE ACADEMY OF NATURAL SCIENCES OF PHil.ADELPHIA NINETEENTH AND THE PARKWAY PHILADELPHIA. PA 19103,

=

Page 2 January 5, 1979 Dr. Elizabeth Bauereis I believe these remarks cover all questions raised by Dr. Roig concern-ing the upcoming dye and thermal studies.

If I can be of further help, please do not hesitate to call.

Si nc,erely, h il / $d:le'b'if i

hn W. Sherman, Ph.D.

Program Manager Division of Limnology and Ecology JWS:sd 4

%" B ALTIMORE l GAS AND

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ELECTRIC[

CHARLES CENTER. P.O. BOX 1475 BALTIMCRE, MARYLAND 21203 ELECTRIC ENGINEERINo January 8, 1979 D E P A R T P4 E N T Mr. W. Lawrence Ramsey Wa' 2r Permits Division Water Resources Administration Department of Natural Resources Tawes State Office Building Annapolis, MD 21401 Re:

State Permit #74-DP-Ol87A NPDES No. MD/OOO2399 Calvert Cliffs Nuclear Power Plant

Dear Mr. Ramsey:

In response to your letter of December 7, 1978 and a meeting held with B.G. and E. representatives and representatives of Water Resources and Pcwer Plant Siting Program at Annapolis on December 20, 1978 dealing with a critique of the CCNPP Study Plan which was submitted on November 15, 1978, we would like to submit a revision of the Study Plan. The revision includes changes or clarifications of the hydrothermal studies, spawning and nursery areas of consequence, an additional Representative Important Species, Crassostrea virginica, und phytoplankton/ zooplankton entrainment studies.

Very truly yours, Douglas E. Clark Principal Engineer Electric Production e

9

d ENTRAINMENT In order to satisfy C(2) (b) of COMAR. 08.05.04.13 we propose to use as Representative Important Species (RIS) in the Calvert Cliffs studies the following organisms: the fin fishes Anchoc mitchilli (Bay anchovy), Leiostomus =cnthurus (spot) and Cobiosome bosci (Naked goby), the molluscs Nyc crenaria (soft-shelled clam) and Crcssostrec virginica (American oyster) ; the arthropod Cc!Iinectes scpidus (blue crab).

We intend to study all life stages of these species which could potentially be affected by the operation of Calvert C.'lifs Nuclear Power Plant.

These animals have been selected for study either because they are abundant, commercially import-ant or.use the area in the vicinity of Calvert Cliffs as a spawning / nursery area and potentially might be affected by cooling water entrainment at Calvert Cliffs (cf. D. 3C).

For

example, A.

mitchilli and c.

boses are among the perhaps three or four species of fishes which do spawn in the vicinity of Calvert Cliffs and are by far the most abundant of these species (ANSP 1978, section 13) and, while L.

=cnthurus does not spawn in the area surrounding Calvert Cliffs, large number of juveniles are present in the area of the plant (ANSP 1978, section 8; Hixson 1978) and constitute a significant portion of the standing crop of demersal fishes in the Calvert Cliffs region (cf. ANSP 1978, section 8).

The soft shelled clam (M. crcncric) and the oyster (C. virginica) have been selected for study because they are commercially valuable species in 1

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Maryland (Shaw and Hamons, 1974) whose adults inhabit the sediments and spawn in the vicinity of Calvert Cliffs, and ones for which a substantial amount of historical information already exists (Abbe 1972, 1974, 1976; Tran-Ngoc Loi 1978).

The blue crab (c. sapidus) hs; also been selected because of its commercial value and abundance near Calvert Cliffs, although because blue crabs very seldom spawn in the low salinity waters of the Calvert Cliffs area (Van Engel 1958) entrainment should not exert any significant influence on post larval or j uvenile crabs.

PROGRAM OF STUDIES Fin Fish Estimates of adult and juvenile population sizes of A.

mitchilli, L. =anthurus and G.

bosci are obtained by the trawling program at several stations in the Calvert Cliffs area (Fig. 1).

This program has been in operation since 1968 and will continue through 1979, thereby providing two full years' information during the time when both generating units at Calvert Cliffs have been operational.

While these population estimates are imprecise, especially for the plankton feeding anchovies and the small bottom dwelling gobies, they do provide some information on abundances in the Calvert Cliffs area.

These estimates will be supplemented and improved on by results obtained from the Calvert Cliffs shore seining program (Hixson 1978) and from the Maryland Department 3

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of Natural Resources Fisheries Administration as well as NOAA fisheries statistics and by sports fishery surveys (e.g. Spier et al. 1977).

Basically, the sampling program to assess adult population sizes consist of monthly trawling at 6, 9 and 12 m depths in the waters offshore Kenwood Beach, the Pla_. Site and Rocky Point (Fig. 1).

At each depth two 15 min trawls are taken by a 25 ft semi-balloon trawl modified as an otter trawl.

The net has a body mesh of 1.25 inches and a cod end liner of 0.5 inches stretch mesh, and is towed at a speed of four knots.

Fish collected in each trawl sample are separated to species and counted.

Fifty randomly chosen fish from each species collected in each trawl and depth will be measured to the nearest 0.5 cm total length.

If fewer than 50 fish are collected all will be measured.

If more than 1,000 individuals of any species is present in any single trawl, volume estimates of the total number in that species will be ma d e".

These data will be supplemented by shore zone collect-ions taken monthly at Kenwood Beach, Long Beach, the Plant Site, Rocky Point and the Plant Discharie.

Five hauls of a 50 ft bay seine (0.5 in stretch mesh) will be made in the shore zone at each site and all fish will be identified to species and counted.

Fifty randomly selected individuals of each species will be measured to the nearest

.5 centimeter and these lengths recorded.

b

In order to estimate the larval abundance of A. mitchi!!i, L. rcnthurus and C.

bosci in the vicinity of Calvert Cliffs Nuclear Power Plant, an ichthyoplankton sampling program will be employed.

This program has been in operation since 1975 and will continue through 1979.

In this p2agram monthly

- samples are taken from surface, mid-water and bottom depths at Kenwood Beach and at the Plant Intake Canal (Fig. 1).

Replicate samples at each depth are taken using a 223 micrometer mesh, flowmeter-equipped plank ton net.

The organisms collected are identified to species and abbndances standardized to number of organisms per 100 m3 During peak spawning periods (late May through August) weekly replicate samples will be taken at multiple depths in the intake channel to provide estimates of fish larval densities which may be susceptible to entrainment.

Ichthyoplankton and Macroplankton entrained abundance is assessed by use of larval tables.

Six samples (three night samples and three daytime samples) at the intake (immediately in front of the trash racks) and at the discharge (stop log structure).

These sample sets are paired in time to account for the transit time between the intake and discharge.

At both the intake and the discharge tne collection device is a double-screened (505 micrometer mesh) larval table with a 4-in centrifugal trash pump supplying the sample water at a rate of about I m3/ min.

Tine volume pumped is monitored with an in-line flow meter for the one hour sampling period (60 m3/

sample).

Surface, mid-depth and bottom volumes are sampled

equally for the one hour to obtain an integrated profile of densities in front of the trash racks.

It is assumed that planktonic organisms at the trash racks will be entrained into the cooling water system.

The collection of twelve samples within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> is designed to track the diel spawning pattern of the bay anchovy, to provide data on entrainment abundances of macro:ooplankton and larvae of other species of fish as they vary between day and night, and to sample the same tidal stage in order to account for this source of sample variation statistically.

On each sampling period, twelve samples will be collected between mid-April 1978 and mid-March 1979.

One entrainment sampling period will be made in April, October, November and December, 1978 and January, February and March, 1979.

From May through September 1978, entrainment sampling will be weekly and will be coordinated where possible with the near-field ichthyoplankton program.

Each samp:e collected will be preserved and enumerated and identified to lowest prac ti cable taxonomic level of fish eggs, fish larvae and macroinvertebrates.

Particular attention will be paid to the selected Representative Important Species.

Mollusca Estimates of the adult population sizes of the soft-shelled clam Nyc crencric are presently obtained in two ways:

a summer clam survey using commercial clam dredging techniques, and a biomonthly benthic sampling program using scientific collecting 6

gear.

The summer clam survey, begun in 1971 and continued in 1973-1976 and 1978 (Abbe 1972, 1974, 1975, 1976), estimates the size of the marketable clam population along a transect from north Kenwood Beach, passing through the Calvert Cliffs area, to a sourtherly endpoint near Cove Point.

An escalator dredge is used to gather clams, which are then sorted into marketable and non-marketable sizes and estimates of the number of bushels / acre are calculated for marketable clams.

Estimates of densities / acre are calculated for non-marketable individuals.

The benthic %ampling program was begun in 1977 (Tran-Ngoc Loi 1978) and includes plant site and control stations to the north and south of the Calvert Cliffs Nuclear Power Plant (Fig. 1).

Samp]cs are collected seven times a year at three depths from each station using a 0.1 m Smith-McIntyre grab sampler.

In this program a mearured volume of bottom sediment with its associated animals is collected by the sampler, and all N. crencria are counted and measured.

The data generated from this program are especially useful for determining juvenile soft-clam abundances and for following their rates of growth in the vicinity of Calvert Cliffs Nuclear Power Plant.

Abundances of larval and recently metamorphosed R.

crencric will be assessed using a program to be introduced during the spring of 1979.

In this study.75m3 of water will be pumped monthly from surface, middle and bottom depths at Kenwood Beach, Long Beach, Flag Pond, the Plant Site, Camp Conoy and Rocky Point (Fig. 1) and filtered through a plankton net of 7

Il

74 micrometers (7 20).

The abundance of identifiable u. crencric in the filtered water will be determined and expressed as 3

numbers /m.

Beginning in May or earlier if water temperatures reach and remain above 140C before that date, samples will be collected weekly at the Plant Site.

The weekly sampling will continue through October of as long as N.

crenaric larvae are still present in the samples.

Molluse counts will be standardized to number of organisms per m3 and all estimates and statistics will be based on these or transformations of these standardized densities.

Similarities and differences 4

among nearfield stations as well as the entrainment station will be estimated.

Spat collectors, similar to those described by Shaw and Hamons (1974) will be used to estimate the abundance of recently metamorphosed soft clams.

These collectors will be placed over appropriate substrates in the vicinity of the plant and at several surrounding locations.

Spat collectors will be sampled weekly during. spawning periods beginning after the appearance of larvae in the water samples and until no further spat are encountered.

Material from the bottles will be washed through a 212 micrometer seine and clams will be counted.

Estimates of the presence and abundance of adult populations of oysters will be obtained by underwater mapping of the location of oyster beds in the region between Long Beach and Rocky Point (Fig. 1) and by using grab sampling supplemented by diver collections.

Divers will also estimate the abundance of oysters on the rip-rap in front of the 8

s

Plant and on the Bay side of the curtain wall.

These estimates will be made in May and October 1979.

The number of grab samples will be on the order of several hundred, depending on the size of the beds found in the mapping procedure.

Each grab sample will be analyzed and the number of oysters greater and smaller than 3 in. in length (excluding newly set spat),

the number of newly set spat that are visible to the naked eye and the number of empty shells will be recorded.

These data will be used to estimate the diversity in bushels / acre of both

' marketable and non-marketable oysters.

Abundances of larval C.

virginica will be estimated in the same manner as those of N.

crencric.

Beginning in spring 1979 3

0.75 m of water will be pumped monthly from surface, middle and bottom depths at Kenwood Beach, Long Beach, Flag Pond the Plant Site, Camp Conoy and Rocky Point (Fig. 1) and filtered through a net of 74 micrometers (#20).

The abundance of identifiable C.

virginica will be determined and expressed as numbers /m3 Sampling will be done concurrently with the R.

crencric program and will therefore cover all periods in which C.

virginica larvae have been found in the plankton of Chesapeake Bay.

Entrainment abundance estimates of veliger and juvenile states of R.

crencric and C.

virginica will augment the ichthyoplankton and macroplankton entrainment samples.

Samples of 6 to 10 m3 will be collected with an 80 micrometer mesh net 9

e with a 0.5 m diameter mouth opening.

This collector net will be placed in the flow of the larval table pump located at the plant intake in order that a known volume of water is sampled.

A water cushion for the net is provided.

Nya crencric spawns from April through June and from late August through November with variations associated with water temperature (Pfitzenmeyer 1962) while C. virginica is primarily a summer spawner in the Bay.

A weekly sampling frequency was initiated in September, 1978 and will continue until mid-November, 1978 for ten (10) collection Sets.

An additional (13) collection sets will be collected between April 1,

and July 1, 1979.

The samples collected for j uvenile Nyc and Crcescstrcc are done in the same manner as the ichthyoplankton entrainment samples (previously described).

The samples will be seived through 500 micrometer mesh screen to separate the ichthyoplankton from the smaller forms and will be combined with the appropriate ichthyoplankton collection to produce accurate density estimates per 100 m3 The S00 micrometer-mesh samples (one liter concentrates 3

of up to 10 m ) represent approximately a 10,000-fold concentration of the natural density of organisms.

Subsampics representing the concentrates up to 20 liters will be examined to obtain abundance estimates of clam and oyster larvae from each sample.

The identification of straight-hinge and early umbo stages to discriminate Nyc crencric from NaZinic IctercZis and Ncecmc bcZthica will be based on taxonomic characteristics as well season of occurrence and the relative 10

c

abundance of the juveniles of N.

crcncric in entrainment samples.

Arthropoda Estimates of the abundance of adult and juvenile blue crabs (cc!Iinectes scpidus) in the vicinity of Calvert Cliffs Nuclear Power Plant are estimated by two sampling programs.

The most detailed is specifically designed to estimate blue crab abundance through the use of commercial crabbing methods.

In this program crab pots are fished four days every other week during periods of blue crab abundance (approximately May-Novemb e r) from Kenwood Beach, Plant Site, and Rocky Point locatior - (Fig. 1).

The number of crabs / pot and the total weight of both male and female crabs are recorded for each sampling station and date.

This study has been conducted annually since 1968 and will continue through 1979.

Adult and juvenile blue crab abundances are also assessed using data from the fish trawling program described previously.

All c.rabs collected by the trawling program are counted, sexed and measured on each sampling date.

Because blue crabs only rarely may spawn in the middle or upper Bay (Van Engle 1958) and larvae are therefore not present in Calvert Cliffs area, no study of larval blue crab abundance need be carried out.

Data Analysis Data gathered in each of the entrainment studies will be treated similarly in attempting to determine whether plant cooling water entrainment affects a spawning area of consequence.

11

, a

First, estimates of the number of larvae and/or juveniles entrained will be compared with nearfield densities of these life stages which may be subj ect to entrainment.

Secondly, these figures will be contrasted with estimates of the size of the adult population and its potential spawn for each of the species being studied.

From these comparisons general conclusions regarding the possibility of significant entrainment effects can be drawn.

_onclusions of potentially significant effects would lead to more detailed analyses of the population dynamics of the species involved.

Phytoplanktsn and looplankton In order to estimate the effects of cooling water entrainment on phytoplankton and zooplankton populations a program of studies has been developed for the summer (June through' September) months of 1979.

The data gathered will be used for comparison with the results of entrainment studies in previous years.

During one 24-h period of each summer month the phyto-plankton pro. cram will make hourly measurements of productivity from water samples collected at the Plant Intake, the access point directly behind the rotary screens at Unit 2 and at the discharge terminus.

Both 2'C uptake and oxygen production will be used to estimate productivity in the sampled wat.er.

Hourly determinations of the concentration of photosynthetic pigment present in the samples will also be made.

At approximately half hour intervals readings of in vivo 12

q

phytoplankton fluorescence will be made at intale and discharge sampling locations at time intervals representing plant transit time (4 min).

Separate water samples will be collecte; hourly at each of the three sampling locations and estimates of the species composition of phytoplankters present in these samples will be made.

~

The data gathered in the phytoplankton program will be used to estimate potential reductions in phytoplankton productivity and biomass, or changes in species composition, which result from entrainment through the Calvert Cliffs Nuclear Power Plant.

The cooplanktan program will inc1ude samples taken every

~

30 min during one 24-h period in June and September and two 24-h periods in July and Augast at the access point directly behind the rotating screens at Unit 2 and at the discharge terminus.

Each sample will be a 20 liter composite of water collected at three depths and will be pumped over a 6-min period into nalgene carboys.

Immediately after collection neutral red vital stain will be added to each sample.

After incubation for 1-h samples will be concentrated, preserved in formalin, and frozen until zooplankton species are identified and enumerated.

The resulting da.a will be used to estimate the survival rate of coplankton shich pass through the Plant and whether changes in species composition may result from selective mortality during plant passage.

13

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STATE OF MARYL AND DEPARTMENT OF NATURAL RESOURCES WATER RESOURCES ADMINISTRATION TAWE5 STATE OFFICE BUILDING ANN APOLIS, M ARYL AND 21401 (301) 269-3321 CERTIFIED MAIL December 7, 1978 Mr. Arthur E. Lundvall, Jr.

~

Vice President Baltimore Gas & Electric Company Cas & Electric Building Baltimore, MD 21203 2

RE: Calvert Cliffs Thermal Studies

Dear Mr. Lundvall:

We acknowledge receipt of your study plan on November 17, 1978 for Calvert Cliffs g

Nuclear Power Plant.

You may have noticed that on December 1,1978 we inadvert-ently published that we had approved the study plan. We have completed preliminary-review and transmitted our critique to your staff.

The review and approval should be completed some time af ter the week c' December 18, 1978, af ter which time you vill receive notification by letter.

The study plan contained a request to demonstrate that a 12*F temperature rise will meet our standards.

This request represents a change in operating conditions as approved by y ir exist'ing permit., and as such, these studies are inadequate. In order to make such a determination, we must not only be able to conclude that these-changes meet our standards, but thc. the changes represent no increase in environ-mental impact. To do this, your study plan must contain some sampling and assess-ment of entrainment effects on phytoplankton and zooplankton. By making relative -

comparisons between this new information and the existing information obtained by -

our completed studies, we should be able to make a decision. This procedure should be consistent with our regulations and EPA permit reissuing policy pursuant to Memorandum 78-10-V (July 12, 1978) and proposed regula tions 40CFR 5122.15 and 0122.31 (August 21, 1978).

~

If you have any questions about the progress of the review, please feel free to _

contact me.

~

Sincerely, Y.

• %fb W. Lawrence Ramsey Industrial & Hazardous Substances Division WLR/c:mb lC

BALTIMORE GAS AN D E LE CTRI C CO M PAN Y C AS AN D ELECT A'O E.;i' DIN s B ALTI M O R E, M A Pv L A N D 212 0 3

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.=x l'. lavrence Ransey j

Water Fernits Division 4b

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Department of Natural Resources

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~ jd Water Resources A4-4 4straticn D

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Taves State Office Builiing 7

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'g An.apolis, Maryland 211+01 9h_g Re: State Pe =it 57h-DF-Ol37A O,

IiFDES I;o. l'D/CCO2399 Q)

Calvert Cliffs nuclear Fever Plant R^'2,

Dear Mr. Ec=sey:

a Jj Pursuant to the recently adopted Maryland regulniens per-taining to Water Quality I= pact Assessment for Ther-al Discharges

(.08.05.Ch.13), Baltir. ore Gas and Electric Cc :any does herein subnit a comprehensive plan for purposes ef:

(a) dete= iring whether the facility ther-n' di:: charge

(

tirL.g zone cc= lies with Maryland water q.:ality standards; (b) deter-4-4 g whether the facility cooling vs.ter entri -

cent affects a spa: ing or nursing area of consegaence for representative important species; and (c) estd-* ting impinre=ent loss pursuant to the regaletion.

This cccprehensive plan is for cur Calvert Cliffs nuclea-Pcpr Plast, and assunes a necessarf heat rejection li 'tatien of 1.5x1P Btu's ter hcur, and tenperature increase across condense s of 6.68 C (12 F). -Tne enclosed cc=prehensive plan is heresy sub itted in lieu cf a.y subnittals

'#nich would othe: vise have been ade pursuant to Paragraphs O and V cf the e:cisting pernit.

Because the Calvert Cliffs nuclear facility is "suf:N.ciently loaded". according to the regula.:orf definition, subnissics of this cc prehensive plan is necessary. It is our intention to cc=nence studies and acti"ities pu stant to the plan en Januar;- 1,1979, en the assu-ptic, that sace meets s-ith your apprcr.d. unless you notiS ts to the cont-arj

/

prior to that da.te.

b.c.c.: Messrs. J.W. Gore,Jr.

Very t 27

,u s, J.3. Bullock N.G. Lassahn D.E.. C. lark,Jr,Jr.

J.W. Stout A

g. y..

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m, a,..

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L.B. 2.:ssell J.A. Biddicen W.R. Suchanan,Jr.

J.F. 3ennett Dr. E.I. E?. nereis -

.nclosure Je

STUDY PLAU TO CONDUCT BIOLOGICAL AND 7

EYDROTHE?J.AL STUDES AT THE CALVERT CLIFFS mICLEAR POE.R PLANT Submitted by Balti= ore Gas and Electric Co=pany P.O. Box 1472 Ealti=cre, Mi. 21203 Prepared by: Division of u-ology and Ecology Tce Acade=y of Hatural Sciences of Philadelphia Philadelphia, PA.

and Ecological Analysts, Inc.

8600 Lasalle Road Tovsen, MD.

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HYLECCEEEMAL S3; DIES I.

INTRODUCTION Ealti= ore Cas and Eledtric Cc=pany's Calvert Clif fs Nuclear Generating Station is located on the western shore of Chesapeake Bay approxi=ately 97 km south of Baltimore, Mary 1cnd.

Two main units within the plant generate approxi=ately 1820 MWe (at peak operating load).

Waste heat associated with power generation is carried by The Division way of once-through cooling water to Chesapeake Bay.

of Linnology and Ecology of the Academy of Natural Sciences of Philadelphia has asked MSRC, SUI"f, Sto:ty Brook to prepare a program of studies to be carr.? ed out during field season 1979 involving ther=al, dye and current studics.

These studies are then to be integrated with pertinent past studies and data by the Academy to examine the question of complia::ce of the Calvert Cliffs Generating Station with the State of Maryland, Department of Natural Resources Water -Quality

~

Criteria.

II.

OBJECTIVES The discharge of heated water gives rise to a spatial and tecporal distribution of te=perature that is excess to the natural (or base te=perature). of the receiving water. Measurement of this

. excess te=perature distribution requires a careful, vell-designed program of reasurement because the base temperature is subject to 1arge spatial and temporal variations due to both natural and can-

=ade source variations (Carter,1975).

Delineation of the field of m y eud M d s

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excess te=perature essentially a=ou ts to extracting a signal (the excess tenperature) which is i= bedded in a background whose variations are of the same order as the signal.

. The specific objectives of the 1979 field studies are to-Deter =ine the location of the 2*C excess temperature 1.

isother= at different phases of the tide, Measure the rate of excess te=perature decay a.long the 2.

centerline, 3.

Measure the depth of the ple=e, 4.

Measure the vid ' of the plu=e, Measure the receiving vater currents at a single nearby 5.

station outside the influence of the discharge during the plu=e studies, Evaluate the effect of a=bient currents, i.e., speed &

6.

excursion, salinity stratification,and recirculation on the size of the plume, and Evaluate the effect of a=bient te=perature gradients on 7.

deter =ining the size of the plu=e.

To acco=plish these objectives, two field studies during 1979 are considered necessary and =ini=al, one i= spring (April) and one in suc=er -(August).

. It is understood that results of these studies will be co=-

bined with already available data by the Acade=y in an overall analysis designed to address criteria designated by Maryla:d 1,av 08.05.04.13.

studies previously cc=-

These data include ther=al, dye and current pleted by the Division of Li=nology and Icciogy and the Chesapeake g! jpi li 3 I

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III.

THER.").L, DYE ND CURRENT STUDIES, 1979 St:aig ?L:n A.

Te=perature, dye concentrations and, current ceasurements will be =ade in the near-field of the Calvert Cliffs Generating Station ther:al plu=e for the purpose of accc plishing the objectives set forth in Section II.

Figure 1 shows sche =atically the canner in.which the plume -

In order to vill be sampled during each of the two ple=e surveys.

preserve the shape of the pluse during ceasurement, each survey should be co=pleted in as short a time as possible.

..e., 1 to 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />, while at the sane ti=e providing ample info: ation to accurately delineate the plume shape both longitudinally, laterally, and verti-cally.

A study period shall consist of five sampling days and as noted earlier there shall be two (2) study periods scheduled as follows:, (1) April-May during a high freshwater inflow spring.ide period; (2) July-August during a neap tide period. During the sched-uled study periods both units will be on line thus permitting the 2*C excess temperature isother= to be delineated at full beat load

^

rejection.

Dye vill be injected for 4-5 days prior to sampling to permit all near-- and far-field excess heat to be tagged vith tracer.

Backgrcund vill be ceasured throughout the area for at least 2 days prior to initiation of the dye injectics.

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Methoi. icgy A dye tracer technique which consists of tagging the condenser cooling water flow prior to its discharge into the receiving waters will be used in this study. Ecrizontal and vertical distributions of the dye in the receiving waters will be, assayed by fluorescence.

Aside fres cooling at the free surf ace, both excess heat and dye are subject to approxi=ately the sane physical processes of advection and turbulent dif fusion.

Since the surface cooling processes are neglibible within the j et, a deter =ination. of the field of tracer is, af ter proper scaling, a first order estinate of the field of excess tenperature.

Accordingly, a (20% solution) of Rhoda=ine F dye vill be continuously released in the cooling water discharge at a rate which '

will ensure dilution determinations of fres 5 to 10 depending'on the natural background variations of the dye tracer.

Dye concentrations and te=perature will be sampled continuously from two (2) sanpling boats as each boat traverses the sanpling area on preselected tracks.

A will be rigged so as to sanple continuously at 2 to 3 levels Boat to a depth of 25 feet; Boat B will be rigged so as to sample con-tinuously at one level acd also to per=it occasional vertical casts.

The following procedure is proposed with the understanding that it vill be modified as experience dictates.

Each boat will sample alternate transects heri entally to background so as to complete Boat 3 vill then all transects at approxinately the sa=e t'.na.

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. sample vertically as directed by the Chief Scientist.

After cc=pleting a survey so as to delineate the 1*C excess tenperature isother=, the procedure vill be repeated as ti=e permits.

This procedure should per=it a' single plu=a, survey to be cenplated in no core than 2 to 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br />.

Surveys vill be repeated as of ten as possible during the sampling day (of the order of 2 to 3 times)". Not =entioned thus' far, but essential to the proper conduct of the study, is continuous, precise positioning of the sampling boats since the tecperature and tracer infor ation is of little value unless it can be accurate 1y located in space.

Therefore, all three ele =ents - te=perature, tracer concentration and position - vill be continuously recorded in real time.

Positions vill be deter =ined by ceans of a range-range ele -

tronic positioning system with an accuracy of t 10 feet.

Tracer vill be discharged continuously into the cooling water flov by' =eans of a =etering pu=p at a rate of approximately 40 pounds est -stions of the h9t being rejected 4

of dry dye per day.

Frequent will be obtaine'd fro = the control roon so that dye injection can be kept proportional to heat rejection. 'The discharge rate vill be regulated by prior calibration of the =etering pt:=p and by placing the dye betrrels on scales which will be checked frequently.

Cal-ibration of all fluorc=ete.rs and te=perature ceasurin5 devices uill

-be cade prior to and af ter each study period to ensure high quality data.

For the purpose of flucrc=eter calibration a standard prepared fro = the =aterial discharged v1.11 he ut#'4 zed.

The te_,perature coefficient of' rheda=i=e is approxi=ately.2.7% decrease in fluorescence Wq W N!O pfjR[

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3 per degree centigrade increase. Acccrdingly, the tenperature =easure-cent system vill be designed so as to render the ceasurc=ents suitable for corection of tracer =easure=ents to a ec= an te=perature.

Continuous current data at several depths in the vic'-4 ty of the plant vil.1 be obtained during the period of dye studies whic*n, When correlated with surface rind data, vf1' be used to deter =ine the influence of vind en the ambient cunent field.

One current

=enitoring station vill be deployed near the plant but outside the influence of the discharge.

At this station, current speed and di-rection vill be =easured at 3 levels, near-surface, mid-depth, and near-bottom.

Instrumentation vill be as follows:

Ele =ent Instrument Tracer concentration Turner Model 111 Iluoreseter or. Turner Design Model 10.

Te=perature Various custon made ther=istor devices.

Position Motorola Mini-Ranger Systen Current data ENDECO Type 105 recording current =eters Co==unications As. nutnally agreed by E. Carter and ANs?

C.

Dat= An= lysis & Inte:grctation ITnen the receiving waters are isother:al, or approW=cely so, dye concentrations and temperatures will be linearly related.

A regression equation, therefore,

r provide both hc=k :'Oura 5

t are.~ turc 2:. scurce strer.gth.

This =ill be the case for the O

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April study.

For the general case, i.e., significant lateral and vertical te=perature gradients in the receiving vaters, this approach is not possibic since the dye concentratic=s and ta=peratures vill be largely uncorrelated.

The background te=perature can be reliably estinated for this case (s" erti=e), however, frem the sub-set of temperatures whose dye concentrations are es'sentially zero.

For the isothermal case, therefore, du :.ancentrations will be scaled tc excess te=perature by = cans of the regression equation.

As backup, the concurrently censured te=perature field could. be converted to excess ta=perature by subtracting the background te=p-erature cbtained froc the sa=e regression equation.

The August ex-periment vill be analyzed by using the chscr.cs of tracer to indicate water at background te=perature.

Faving detcr=ined the lat.cral and vertical temperature distribution of this background vat.cr (zero tracar concentiration), the field of excess te=perature vill be ob-tained by subtracting this field of background te=perature from the measu;ed te=pefatures.

The data so obtained vill be used to plot the horizonta2.

distribution of excess te=perature to and including the 3C isothern at three levels, the vertical distribution of excess te=perature, and the distribution of peak excess te=perature as a function of downstrean distances for each separr.te ple=e deter =ination.

Areas bthin the isother=s vill be planimetered and tabulated..

Current data vill be resolved into alcnrshore and on/off shore con-ponents and filtered to obtain the non-tidal flow.

It vill be

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~m cape or cards for furthec processing by the Acade=y.

Tidal excursions will be calculated fro = the current records and a table provided show-ing the frequency of various length excursions on both ebb and flood.

Liind data v.11 be obtained frc= EG & E and provided as tapes or on cards.

IV.

ASSDGLT, PRIIk' AND ANALTSIS OF TDE SERIIS RICORDS PrT ATIVE To PLUME CONFIGUP.ATICNS All pertinent data and'results generated by the preposed plu=a studies and the 1977-1978 ANSF ther=al plu=e rappings will be analyzed relative to daily plant operating records, vindspeed and direction and tidal data, local and off-site salinity and tenperature data, data. This review will include but will not necessarily be limited to the 1977-78 data of:

1.

Daily plant data as recorded on operating records.

2.

Daily vind speed and direction as recorded on operating records for the on-site =eteorological' tower.

3.

Daily ra.xi=u= and =1=i=== surface and botto= vater te=peratures from the en-site =enitor..

Daily =aximus and =ini u= vater te=peratu es frc=

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4.

Solocons Island if available.

5.

Daily =axi=us a=d nini=== vater te=peratures fro =

Solo =ans Island if availr.ble.

6.

Daily caxi=u= and =ini=u= salinity fro = Solcrons Island if available.

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The above ti=e series data vill first be used to catagorire daily con-ditions during the periods of the 1977-1973 GS? thar- plu=e mappings and the proposed dye studies.

This il include.:

1.

Plant discharge buoyancy from intake salinity, ten-perature and heat addition relative to the vertical gradient of salinity and te=perature for estied-tes of the tendency for the plu=e to stratify on the surface or to inter ediate depths.

Results from the proposed dye studies.dll be used to correct the o.n-site conitor terperature data for recirculation.

2.

An e-c mination of the daily and day to day varia-tions in surface and bottom temperatures at the on-site conitor and at Solomons. The purpose of this study is to deter =ine the background fluctua-tions in ta=perature to which the plume excess tenperature. isother=s are referenced and to deter-eine the seasonal patterns, if any, of the day to day variability.

3.. An en-ination of the salinity records similar to The that performed in iten (2) for te=perature.

on-site salinity records vill be related to the detailed sali..ity data taken during the proposed dye studies.

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Developtent of relationships betvean the on-site 4.

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wind speed sad direction data to the wind and cur-

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rent relationships estabih.sbed as part of the proposed dye study.

An e.u=inition of plune sizes and variability (size 5.

and orientation) froc the 1977-1978 ANSF plume.

mappings and the proposed dye studies relative to the above para =eters and relative to plant loads.

These studies allow relating the detailed conditions during the periods of plune surveys to preparties of the icn; ters records.

Af ter the observed plune cc:ditions are related to the long term records, the two years of daily data vill be exa=ined_ to deter =ce the frequency and seasonal patterns v~_th which the observed plea con-ditions existed over two years of record.

Using the wind speed. tide and observed current relationships established during the propcsed dye study periods and fron other past data, the two years of daily record vill be cximi.ned tc deter =ine the frequency and seasonal pattern of a:bient currents and daily tidal excursicas. The frequency of differ-ent ple=e sires and configurations v' ' also be deter =ined if possibic.

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In order to satisfy C.(2) (b) cf C0ma.06.05 04 13 ve propose to use as Eepresentative I:;ortant Species (TCS) in the Calvert Cliffs studies the following organis s: the fin fishes Anchoa ritchilli (Eny anchovy), Leicste ns_ xanthe us (spot) and Gobiosen.a besci (cahed Eoby); the colluse Mya arenaria (coft-shelled clan); the arthropod Callinectes sa :idus (blue crab). We intend to study all life stages of these species which could potentially be affected by the operation of Calvert Cliffs Kuclear Power Plant.

These ani=als have been selected for study either because they are abundant, con =ercially i=portant or use the area in the vicinity of Calvert Cliffs as a spawning / nurser-/ erea and potentially might be affected by ecoling vater entrainment at Calvert Cliffs For exa le, A nitchilli e.nd G. bosci are among (cf.

D.3C).

p the perhaps three or four species of fishes which do spawn in the vicinity of Calvert Cliffs and are by fa-the ncst abund. ant of these species ( ANSF 1978, section 13) end, while L. xanthunts does

~

not spawn in the area surrounding Calvert Cliffs, large number-of juveniles are present in the area of the plant (Il:SP 1978, section 8; Eixson,1978) and constitute a si nificant portien of the f

standing crop of denersal fishes in the Calvert Cliffs region (cf. AHSP 1978, sectic: 8). The soft sh"ed clan (E. arenaria) has been selected for study because it is a centercially valuable species in ".ar7 and (Shav and Ha=cns,197L) whose adults inhabit 1

the sedi=ents and spae in the vicinity of Calve-t Cliffs, and cne for which a substantial enount of historical info ztion.

already exists (Abbe 1972,197L,1976; Tran 'igec lei 1976).

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o-rne blue crab (C. sapidus) has also been selected tecause of its cc=:ercial value and abundance rear Calve-t Cliffs, althoesh because

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blue crats very seldc= spawn in the icy ""-4 ty vaters of the Calvert Cliffs area (Van Engel,1958) entrai= ent should not exert any signif-icant influence on post larval or jun lle crabs.

PROGEAM OF STUDIIS Fin Fish Esti=ates of adult pepulation sice of A titchini, L. xanthurus and G. bosci are obtained by the trawling progra= at severci stations in the Calvert Cliffs area (Figure 1). Tcis pro;;ra: has been in operation since 1968 and vill continue through 1979, thereby providing two full years' infor:ation during the time when both generatin,r_ units at Calvert Cliffs have been operational. While these population esti=ates are icprecise, especially for the pl z.nkton feeding anchovies and the s-aT T botton dvel. ling gobies, they do provide sc=e info =ation on abundances in the Calvert Cliffs ;

These esti=ates vill be supple: entec and i= proved on by results ob-area.

+dned from the Calvert Cliffs shore seining progran (Eixon 19T8) and froc the Faryland Departtent of Latural Eesources Fisheries A&imistration as well as NCAA fisheries statistics and by sports fishe:/ surveys (e.g. Spier et al.

1977).

Basically, the sa: plies progrs= to assess raiult population sizes ccusist of conthly travling at 6, 9 and 12 m depths in the vaters offshore Eenvcod Beach, the Plant Site and Eocky Point (F: g.1).

At each depth two 15 min travis are taket by a 25 ft se=i-balleen t.ravl rodified as an otter travl. The net has a body rest of 1.25 inches and a ecd end liner of 0.5 inctes stretch mesh, and is teved at a speed of four knots.

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Fish collected in each travi saqle are separated to species and counted. Fifty rando=ly chosen fish f c each species collected J

- #t in each trawl and depth vill be reasured to the nearest C.5 cm tota.1 If If fever than 50 fish are cc~lected a'.1 vill be reasured.

length.

more than 1,000 individuals of any species is present in c=y single trawl, volu=e esti=stes of the total nunte-in that species vill be cade.

These data vill be supplemented by shore ecce collecticus taken =enthly at Kervood 3each, long Beach, the Plant Site, Rocky Point a:.d the Plant Five hauls of a 50 ft bay seine (0 5 in stretch resh) vill Discharse.

be rade in the shore cone at each site and a fish vill be identified to species and counted. Fifty rande iy selected individuals of each species vill be censured to the nearest 0.5 certi=eter and these lengths recorded.

In order to estimate the larTcl atendance of A. =itchilli,

1. xanthrurus and G. bosci in the vicinity of Calvert Cliffs Nuclear.

Power Plant, an ichthyopl=* ton sa=pling progrc= vill be e= ployed.

Tnis pro ra: has been in cperation since ICT5 c:i vill continue through 1979v e

In this pro ~_ an conthly sa=ples are tGen frc= surface, rid-vater and e

betten depths at Eenvood Beach and at the plant Intake Canal (Fig.1).

Replicate sa:ples at each depth are tden using a 223 cicrorter resh, flovreter-equipped plankton net.

The crganists collected are identified to species and abundances standardiced to number of organis=s per 100 m3 During peak spavning perieds (late May through August) veekly.replice.te intake channel to provide

, sa=ples vill be tahen at =ultiple depths in the esticates cf fis'a larizi densities which ray te susceptible to entrainment.

Ichthyopleckton and I'acropla.dto: entrained abundance is assessel by use of larval tables.

Six sagles (three night sarplcs and three da;-time sa ples) at the 1:tse (irrediately in front of the a /: s n sn rn

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These sample crash racks) and at the discharg- (step los st-ucture).

sets arepaired in time to acccunt for the ::1.nsit tine between the J

At both the intake ani the discha:ge the intale and discharge.

collectics device is a double-screened (505 =icro=eter nest) larval table with a h-inch centrifugal trash pn p supplying the sa:ple water at a rate of about 1 =3/ =inute.

L.e volu=e purped is nonitored with an in-line flow reter for the one hour sa=pling period (60 c3/sa=ple).

7 for the one Surface, =id-depth and botto= volunes are scled eqra'7 hour8.101852e-5 days <br />0.00194 hours <br />1.157407e-5 weeks <br />2.6635e-6 months <br /> to obtain an integ ated profile of densities in front of the trash It is assured that planktonic organis=s at the trash racks vill be reeks.

'~ne collection of twelve sa=ples entrained into the coeling vater systen.

within 2k hours is desi :ed to track the diel spawning pattern of the 5

bay anchovy, to provide data on entrain =ent e.bundances of nacrozcoplankton and larvae of other species of fish as they vary between day e.nd night, and to sarple the 'sa=e tidal stage in order to account for this source of sa=ple variation statistically.

On each sampling period, twelve sc=ples vill be collected One entrain =ent sa=pling between mid-April 1978 and =id-hrch 1979 period vill be made in April, October, Love =ber and Dece=ber,1978 and January, February and March,1979 Fren Kr;- throu6h Septe=ber 1978, entrain =ent sa pling vill be weekly and vill be coordinat.4 vhere possible with the nearfield ichthyoplankton prog-sr.

Each sa=ple collected vill be prese-ved and enu=erated and identified to lowest practicable tarenc=ic level of fir t eggs, fish Particula-attention vill be paid to 1arvae and =acroinvertebrates.

the selected F.epresentative Irportant Species.

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cle !@a arenaric are presently obtained in tec ways:

i survey using co=nercial cle= dredging tech:iques, and a binonthly The s" r

teethic sa.pling progran usi:5 scientific collecting 6 ear.

clan survey, begun in 1971 and continued in 1973-17'6 and 1978 (Abbe 1972, 1974, 1975, 1976), esti=ates the size of the narketable cla: pop-ulation alens a transect frc= north Eervood Beach, passing through the An escalator Clavert Cliffs area, to e. southerly endpoint near Cove Point.

dredge is used to gather cla=s, which are then sorted into narketable and -

non-narketable sices and estinates cf the nu=ber of bushels / acre are cal-Estinates of densities / acre are calculated culated for narketable clans.

for non-=arketable individuals. The tenthic sampling progra.a was begun in 197T (Tran-Egcc Loi,1978) and includes plant site and control stations to the north and south.of the Calvert Cliffs Euclear Power Plant (Fig.1).

Sanples are collected seven ti=es a year at which three depths from each In this progra= a station usins a 0.1 c Scith-McIntyre grab sa=pler.

ceasured volune of botto= sedicent with its associated

="4-=7 s is collected Tne data by the sarpler, and all M. arena-is are ccunted and measu ed.

generated frot this progran are especially useful for deterr.ining, juvenile soft-clan abundances and for following their rates of gro.rt.h in the vicin-ity of Calvert Cliffs Nuclear Power Plant.

Abundances of larval and recently reta=orphosed g. arenaria vill be assessed using a progrs= to te introduced during the spring cf 1979 In this study.75n3 of water vill be purped =cnthly from surface.

niddle e.nd botten depths at Kenvood Beach, Long Beach, Flag Pond, the Plant Site, Camp Co cy and P.ocky Point (Fig.1) and filtered through a plankton net of 74 ciereneters (#2C). T e abundance of identifiable

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nu=bers/n3 Beginning in rey or earlier if water te::peratu es reach er.d re=ain above 150C before that date, ss.:=les vill be collected veekly at the Plant Site. The weekly serpilng vill centinue through October or as icng a's M. arenaria larvae are still present in the sa=ples. Monusca counts vill be standardiced to nu=ber of organis=s per m3 and all estinates and statistics vill be based on these or transfor=ations of these standard-ized densities. Similarities and differences among nearfield stations as well as the entrain =ent staticr. vill be esti=2ted.

Spat collectors, similar to those described by Shaw and Hanons (197k) vill be used to esti= ate the abundance of recently retamorphosed soft cla=s.

These collectors will be placed over appropriate substrates in the vicinity of the plant and at several surrounding locaticns. Upst collectors vill be sampled weekly during spexning pericis beginning'after the appearance of larvae in the vater sa=ples and until no further spat are encountered.

Material from the bottles vill be vashed through a 212 =icrometer seine end clans vill be counted.

Entrainment abundance estinates of veliger end juvenile states of. arenaria vill aug=ent the ichthyoplankton and tacroplankton entrain =ent samples. da:ples of 6 to 1C:3 vill te collected with an 80 microreter essh net vith a 0.5 n diameter routh opening. 'Inis collector net vill be placed in the flow of the larval table pump located at the Plant intake in order that a known volute cf vater is sa: pled. A vater 'cushicn for the net is. ovided. g arenaria spavns from A9 11 through June and froc late August through Hove =ber with va-istions associated vith water terperature (Pfitzenreyer,1962). A veekly sampling frequency was intiated in r. - {!;', %jn. iih[}la, h (N n 7 ; h : ';:i$' .3 m4 .a m?wm _ wn -7..

Y g 5" d-50verber,19T8 for ten (10) ~ september,1978 and vill continue n:'#* collection sets. An adiitic=cl (13) collectic sets vill be collected 6-4 between April 1 and July 11979 The sarples cellected for juvenile Mfa are done in the same " nner as the ichthycplanh::: entrainr.ent sa=ples (previcusly described). The sa=ples vill be seived through 500 =icro=eter mesh screen. to separate the ichthyople.::ktc= frcs the smM er for:s and vill be combined collecticr. to produce accurate density with the appropriate ichthyoplanhte estimates per 100 m3 The 800 micrometer-=esh sa:ples (ene liter concentrates of up to 10 n3) represent appro.-1:stely a 10,000-fold concentratice of the natural density of organis=s. Subsamples representing the concentrates up to 20 liters vill te examined according to Pfitnenneyer (1962) to obtain abundance estimates from each sample. The identificaticn of straight-hinse and early unbo stages to discriminate ptra a enaris. frc I'ulinia lateralis and I/.aeora balthica vill be based on taxonc=ic characteristics as well season of occurrence and the relative aturdance of the juveniles of E. arenaria in entrainment sa ples. Arthrocoda Estinates of the abundance of adult and juvenile tite crats (Cc111:ectes sapidus) in the vicinity of Csivert Cliffs I!uclear Power Plant The rest detailed is specifically are esti=ated by two sampling progra=s. designed to estimate blue crab abunda:ce thrcush the use of cocrercial cratbing methods..In this program crab pets are fished.fron days every. other week during perieds of blue crab ab'ndance (approd-ately I'ay-Hove =ber) fro = Eervood Peach, Plant Site, and Ece27 Pcint locations (Fig.1). The number of' crabs / pot and the total vei6ht of both rale and female crabs l .. -, eq -; n mms' l ) -l!I (l 1 s.. ~~

j yv 0

t This study has been N"" are recorded fcr each ca=;11n5 station er.1 date. Adult and conducted annun1'.y since 1968 and vill continue through 1979 Juvenile blue crab abundances are also assessed w:ing data from the fish All crats collected by the trawling travling prog as described previously. Because blue progrs= counted, sexed and reasured on each sa:pling date. crabs culy rarely ray spawn in the =iddle or upper Bay (Van Engel 1958) and larvae are therefore not present in Calvert Cliffs area, no stud, of larval blue crab abundance need be carried cut. Eata Anal sis Data gathered in each of the entrainment studies vill. be treated sirilarly in atte=pting to deter =ine vtether plant cooling vater entraintent First, estimates. of the number of effects a spawning area of ecusequence. larvae and/or juveniles entrained vill be ec= pared with nearfield densities Secondly, these of these life stages.which =ay te subject to entrain =ent. figures vil.1 be contrasted with esti=ates of the size of the adult population From these and its potential spawn for each of the species being studied. co=parisons general conclusions regarding the possibility of significant Conclusions of potentially significant entraincent effects can be drawn. effects vould lead to = ore detailed analyses of the population d;ma=ics of the species involved. IFPI:!CSE'iT Procra= of Studies .08.05.ch.13 and esticate In order to satisfy Section F cf COMAR the value of impinged species destrcred by the intake structure the follev-To estinate the total nt=ber of ergsnists ic_ ing programs are propcsed. (0.25 inch =esh) vill be placed for ene hour'in the pinged, a nylon net discharge treugh at ee.ch unit at CC:!? cn each of si censecutive days. L. Mi

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ecunted and veiched by species. ?. .h All crganisns catsht vill be identifieic h A. For each cs pling period, up to 50 indidi als of each species fron eac 7 A.Ser two or three days withcut unit vill be =casured for total length. first one sa=pling the sir. day canpling cycle vill te repated, with.he Ct each succeeding day hour sa:pling period beginning at 0000 hou-s. Beginning hours vin be rotated sa=pling vill begin four hours later. The second conected of thm day so that all possible hours are sa= pled. d the vill always begin two hours after the first sampling is begun an day. This generr. ting unit to be sanpled, first vill be cite nated each f plant cper-study has been carried cut continuously sin:e the begirning o 1979 ation in 1975 U.WP 1975,197o,1977) and vill continue through In attempting to estinate the actua.1 nunbers of crganis=s i destroyed by cperation of the CCEP a survi*.al study of selected spec es systet after they have been impinged and travened through the return This study was beg.n in 1975 and is being repeated vill be carried out. The design censists of cenecting impinged fish in large during 1978. holding tanks and "Mng observations en s= rival of each species et tines 0, 2h and h8 hours. Data > Analysis From these studies on the rest ec=:en species of fish. impinged for the total at CCEP it vin be possible to calculate yearly estirstes ~ t numbers end lecgths of fish and blue crats destroyed by impinsecen. d. ' These values can then be multiplied tines the price for each species l size class and (COM.G.08.02.09 01) w. lues st-ed to provide the year y total dollar value estinate for impingement' losses. l ,, \\ ,,, 3.9, y p, wp s. vt,- o ,! p\\ ., i s:

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9 LITE?aTUEZ CITID i* 1972, 197L-1976. Eenthic survey for soft-shell Abbe, G. A.populatices near Calvert Cliffs fer the Baltir. ore cle.: Cas and Ilectric Cc ;:any. AI;S?, unpublished reports. Non-radiolc5 cd enviro ente 1 tonitoring 1 ANSP. 1975-1973. A ual report - Calvert Cliffs Nucles.- Po.rer Plant. Feports sub=itted to Balti= ore Gas and Electric Co:pany. 1976. Shore Seining Studies ' Eixon, J. E. III and B. Wilson. in the vicinity of Calvert Cliffs,1977, for Balticore Gas and Electric Cc pany Loi, Tran-56cc. 1978. 1977 Benthic Studies near the Calvert Cliffs Unclear Power Plant of the Balti= ore Gas and Electric Co=pany. AUSP, F.eference No. 75-39 L9 pp. 1962. Periods of Spavring and Setting of the Pfitser ; er, E. Soft shell clan, Rea arenaria. at Solr_ ss, I'd. Ches. Sci. 3(2):114-120 Shav, W. N. e ad F. Ea=ons. 197k. T e status of the soft-shell cla= in Maryland. Proc. Uatl. Suish Assoc. 6!;:38 M. 1977 1976 Speir, E. J., D. R. Weinrich ami R. S. Early. Fisheries Maryland Chesapeele Bay Sport Fishirs Survey. AA-4 nistration, l'.aryland Depart:ent of Hatural Resources. Van Ingel, W. A. 1958. The blue crab and its fishery in Chesapeake Bay. Cc==. Fish. Rev. 20:6-16. e O 9 e e w' S f w(,._, fe" e jn ;U o w},'( 0 9

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