ML20058E464

Marine Ecology Studies Re Operation of Pilgrim Station, Semiannual Rept 36,Jan-June 1990

ML20058E464
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Site:	Pilgrim
Issue date:	06/30/1990
From:	BOSTON EDISON CO.
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ML20058E453	List: BECO-90-054, Forwards Marine Ecology Studies Re Operation of Pilgrim Station,Semiannual Rept 36,Jan-June 1990 ML20058E464 ML20058E469 ML20058E479 ML20058E482 ML20058E486
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NUDOCS 9011070183
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' b) I, MARINEEC0LOGYSTUDIES i I! RELATEDTOOPERAT10NOfPILGRIMSTATION I l: SEMI-ANNUALREPORTN0.36 g REPORTPERIOD:JANUARY 1990THROUGHJUNE1990 I DATEOfISSUE: OCTOBER 31,1990 g I i t . Compiled and. Reviewed by: M-n N E ORobert D. Anderson Senior Marine F1sheries Biologist Il! l \\ i .l Jl) c ~l-Regulatory' Affairs Department i u Licensing Division Boston Edison. Company l3 25 Braintree Hill Office Park 5 Braintree,. Massachusetts 02184

6 I 16BLE OF CONTENTS-t S.ECIIDH I. Summary 11' Introduction' III Marine Biota Studies I IIIA. Marine Fisheries Monitorlag Semi-Annual Report' on Monitoring to Assess Impact of Pilgrim I Nuclear Power Station on Marine Fisheries Resources of Western Cape Cod Bay, Project. Report No. 49 (January - June 1990) _ Mass. Dept. ( of Fisherles, Hilditfe and Environmental Law Enforcement;.' Division J. e of Harine Fisheries) IIIB Senthic Honitorina Benthic Algali and Faunal Monitoring at' the Pilgrim Nuclear. Power June 1990 (Science -Applications

Station, January 1990

, International Corp.)~ I f IIIC! Entrainment'Monttorina. I L 'Ichthyoplankton Entrainment Monitoring at Pilgrim' Nuclear Power ' Station, January --June 1990 (Marine Research, Inc.) E. i LIIID IBRIAgAmtat_tionitoriag [ b Impingement of Organtsms at Pilgrim Nuclear Power Station;. January o L- - June 1990. (Boston Edison Company) } p' " IV. Minutes of Heeting 73' of the Administrative-Technical Committee, Pilgrim iNuclear' Power. Station l. j s u l -i x I II 2

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SUMMARY

Highlights of. the environmental survelliance and monitoring program results obtained' over this reporting period (January - June 1990) are presented be-low (Note: PNPS was operating at normal power level from January - June 1990 with.the exception of an outage during most of March and April). hlarine Fishtries Monitorina: 1. Pelagic fish mean catch from-January - June 1990 at the gill net sta-tion (72-fishes!. set) decreased 38% from 1989 when 117 fishes / set were taken.' Pollock (48%), striped bass (16%), Atlantic herring (9%), alewife. -(9%) and conner (5%) made up 87% of the total catch, q Striped. bass were sampled in much higher relative numbers than during. f -previous years-in the thermal effluent. '2. : : Shrimp trawl: catch from January - June.1990 recorded, thirteen benthic ~ fish species. with winter flounder (40%), windowpane -(21%), little . skate (20%), and - ocean pout (6%) composing 87% of the total. Mean catch-per-unit-effort (CPUE) for all species was highest at the . Intake Station (7;2) and 5.5. for all stations pooled in 1990 (33% L L less > than in 1989). CPUE from -January - June 1990.for commerciallys important winter flounder was highest at the. Intake Station.- The' i mean smallest winter flounder recorded were sampled in the intake-

embayment.

i W 3. Adult lobster,mean monthly catch rate per pot haul in May -~ June 1990 E was.0.26 lobsters (0.27 in 1989). This reflected a general constancy [ i I-l _..,.m . +,

f in CPUE = in the whole Cape Cod Gay commercial lobster fishery. The surveillance area (thermal plume) catch rate was 0.27 while the reference area (control) was 0.21. c 4. In May - June 1990 fish observational dive surveys four species were observed in the discharge area. Striped bass (66%) were the most numerous species seen, with bluefish second (17%), tauteg third (11%) and ' cunner (5%) last in ot'servational abundance. No fish showed' abnormal behavior and-no gas bubble disease symptoms were observed on 1 routine observational dives. Most fish were in greatest concentra-i tions in'the path of the PNPS discharge, being observed most often in the denuded zone (99%). - Blue mussel proliferation andf algal growth I in the denuded zone, and outside of it, were dense following the PNPS , outage-for most of.. March and-April 1990. ? L' 5. Sand, lance.spp. accounted for 82% of the June 1990 haul seine (shore l a zone)Lfish catch, nor.thern pipefish 5% and Atlantic tomcod'4%, with a total of eight-species collected. Diversity was greatest at the PNPS . intake. CPUE was highest in: the PNPS intake embayment.where ' sand a p lance spp, we'e. dominant. r 6.? The. mid-May.through June 1990 shorefront sportfish survey at Pilgrim 3 Station recorded 470 angler-trips. PNPSoperation,'whichresultedLin i--- maximum ~ thermal discharge to ' attract. sportfish species, reflected-good. catches of striped bass and bluefish compared with the previous,- 'h outage / low power years. 7. The research lobster study commenced in June 1990 and recorded'0.20 adult lobsters (0.31 in 1989) per pot as a catch rate in 620 pot-Is I-2

t hauls. The-catch rate for adult lobsters was similar at Rocky Point and the PNPS discharge area but noticeably higher at Priscilla-Beach, the same results as in 1989, rg'

5

,8; . Preliminary, cunner tagging study research conc:.r'_ rated on assessing tag type, location, ' retention, visibility and fish survival for the I planned 1991 project. i I fC

1mpJngement Montforina

o .I'.. The; mean. January -- June 1990 -impingement collection rate was 0.52 f . fish /hr' The, rate. ranged from 0.10 fish /hr - (June) to 1.11 -fish /hr i L (February) with Atlantic. stiverside comprising. 55.8%. of' the catch, a .followed 5 by winter flounder 8.2%, Atlantic. herring 7.8%, and. grubby-j '5.1%~- a ll m R ^ c2. For the period January-March 1990, when'the f1sh: Impingement rate-was 1 2 0.62.s Atlantic silverside accountedn for; 69.1% of the' f1shes. col-1l,LP Elected. cFish. impingement: rate' was approximately thei same' as in 1989 ~ 4 Omi ^. T;, < 1 x ~-(0.55), but lower in : 1988- (0.30) because Ptlgrim; Station.had less L t 6, K 1 circulatf g,ater: pump capacity than normal that year,. 1 A 11., The mean-January:- June -1990 invectebrate collection-rate was O'.58/hr-Q . with';sevenspine bay.-shrimp accou'nting' for' 50.0% and 'longfin squid; t 10.5% of.the. catch. -Sixteen American lobsters were caught. i; E4. . Initial Impinged. fish survival-at the end of the ~ Pilgrim Station'in-o Ltake slulceWay was approximateiy 75% for static washes and-5% for 4" continuous. washes.- p. lEl I-3 FW;,, a k ':

i p. ~ L: y g. denthic Monit'orina:: S i h,> 11. No new species of invertebrate fauna were added to the list of sampled bio;a '.s a result of analysis of. the April 1990 samples, keeping the,.otal number of species at 483 in the PNPS area.- M 2. Species richness between the PHPS discharge and the Manomet Point / i

Rocky Point. stations was. not notably different 'in ~ April 1990, as in

. March 1989. .I 3.. Greatest faunal-densities In April 1990 occurred at Hanwet. Point. 1 i Faunal densities' were also lower at' the" Effluent than at. Rocky. Pointh Approximately a. 45%Jgreater difference;was found for both @v s

Manomet Point and Rocky Point.when compared to the Effluent.

Changes 4 'in1 rank were not found among stations for. ' density.without. olue. mus-sels (Mytilus edulis).- .;u 4

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-4.- There: w e a xconsistency between pairs iof/ stations for- : dominance; g? - patterns,' wl'thlonlyj 6 of 'the 15 ' dominant species 'at each1 station inot-a; n;y j) . ~ ?, ',' y Lbeingt shared.. : Amphipods were the major 1ty' of the dominant' taxay,.and g( (' ' i biue mussels ranked first representing a minimum 'of 76% of' the total .j + a e o fauna' ati each station. Species ~ diversityTwas intermediateat ; the U Effl.uent' Station ~ betweenL Rocky EPoint and: Manomet 'Pcint', without Mu .Hytilus.- b dN 5.' No. additional algal' species were encountered in' the study area during - N ' 'i

- April:11990. ' Algal comunity overlap was ' high (~927.) among all three l

station nstrs..but community o'lerlap values showed that the Effluent j W I.4 g,, x 9,.s, a - + iv ,,.m-

a n station was lower than the reference stations when xcompared.to each 3 other. + l . 6. - iTotal algal, blomass ~ was higher at the ' Effluent than at the Manomet j ' Point - and Rocky Point stations. Mean Chond. tut blomass was higher at t the-Manomet Point station than the other stations, and Phvilonhora j I spp. biomass was : highest at the Effluent. and lowest at Manomet Point '{ h station.- i e l. .AprlNand June 1990. mappings of the near-shore acute impact zones .E-were Lperformed. Negligible Chondrus growth in the denuded. zone' was' f l; evident: for' both Aprli and June. indicating impact since - the 1986 s M 1 .1988 PNPS outage. The warm-water alga, Grullaria tlkvahtae, was h present in the discharge area because of increased operation.of!PNPS. O ~ >from'J'anuary'--June 1990. A y L EntrA] ment Mon 1 tor _ing: 7* a f '1.

A1 total l.of L34 species of fish eggs: and/or larvae: were found. Ine the i

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January;- June'1990 entralnment collections.

p., t y f4, i u ~ 'l ( f;v 2. Egg collections :for January - April ~1990 (winter-early spring spawn-uw 4 j .ing) were; dominated by Atlantic cod, American plalce, syellowtall- ?! ~' b g 'h ' 4 . flounder!and'fourbeard rockling. May and June (late spring - summer; spawning). egg' samples were most representative of Atlantic mackerel' .o and labrids. i o 3: ; Larval collectionsc for-January - April 1990--were domineted byl rock i EJ' gunnel, sculpin;and sand: lance. 'For May and June larvae, sand lance, 4 y

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e g; W i ' winter flounder,. fourbeard rockling, American plaise and radiated-L. shanny dominated' \\ .,e L4; .One-lobster larva (Stage:1) was. collected in the entrainment samples u lI forI anuary - June 1990,'the-first since 1982. J l5. In no - cases were: unusua'lly high -densities of ichthyoplankton found,

requiring contingency sampling to be initiated.

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i r INIRODUCTION .i /A..S. top 1_And_ Objective This ;is the-thirty-sixth. semi-annual report on the status and results of the' Environmental Surteillance and Monitoring' Program related to. the operation of-Pilgrim ' Nuclear. Power Station (PNPS). The monitoring v programs discussed in this. report relate specifically to the Hestern Capez i Cod Bay ecosystem with particular emphasis on the Rocky Point area.- This l n - t is 'the. twenty-fourth semi-annual-report - in-accordance with. the j environmental monitoring and reporting requirements of the ' PNPS Unit 1; 4 n f l-NPDES Permit'. from the' U.S. Environmental Protection Agency (#HA0003557). 4 i and' 'Hassachusetts Division' of Hater Pollution. Control,(#359). .A ) a 1 j L mul t1-year o (1969-1977)1 report. incorporating ' marine,fisherles, benthic, j L t R, ' plankton /entralnment and impingement studies was ' t -l tted to. the NRC in. 4 l July.1978x as regul. red by1the PHPS Appendix 1B',. Tech. : Spect. : Programs in [ p i j' these ' areas :have been continuedt under the PNPS NPDES permit. Amendment: s, i l gm T#67f(1983) f,to the PNPS iTech,3 Specs. deleted Appendly B : non-radiological l water (qualityy requirements _ as Lthe1NRC ' felt etheyTare1 covered inithe N'PDES l (Permit. )e LThe objectives iof-Lthe, Environmental Surveillance. and Monitoring Program - u o ' + y. are:' tobdetermine' whether the operation of 'PNPS results in. measurable.ef. .3 ,y Efectsion theimarine ecology. and to evaluate the significance 'of:any obl g iserved effects.. If: an effect of.' significance 11s detected, Boston-.Edisoni a /av l{ Company has committed to take ' steps to. -correct' or mitigate -any 3 adverse - Y ~' situation. 1 ( s. i

4 il ef f - {L I These: 9tudies are'guldsd by;the; Pilgrim Administrative-Technical Committee o (;a %g >

(PATC) which/was chaired by a member of the Hass. Division of Hater Pollu-F

' tion' Control-in 1990 and ; whose membership includes representatives from the Uni _versityfof. Massachusetts, the Mass. Division of Hater ' Pollution - Control,- the_, Mass. Division of Marine Fisheries, the National Marine w . Fisheries Service (NOAA),-the Mass. Office of Coastal Zone Management..the ' U.S Environmental Protection Agency and Boston-Edison Company. Copies of-1 l %r the: Minutes; of 'the Pilgrim Station - Administrative-Technical Committee _ meetings' held during this reporting period are included in Section IV. ?t B Marir:e_ Bioti Studies' ^ 1. -Marine'Fisherles Monitorina @n initiated in > ; A-modified l version:of?the narine fisheries monttoring, g-1 Comonwealth of ' Massachusetts-g l-u1981,7-is:ibeing;Lconducted, by. the Division ofl Marine fisheries (DMF). m 4 q 'Theloccurrence and: distribution of fish 'aroun'd Pilgrim Station and at-4 L sites 1.outside the? area of1 temperature increase -are being monitored; L + Pelagic ispecies ' were Jsampled using gill' net (1-station) collections-i_f i(Figure':1);made at monthly-intervals. In 1981, shrimp: trawling and haul l setning.:were initiated 'which provide more; PHPS impact-related! y' X saspl.ing ~of1 benthic-fish and ' shore zone fish,.respectively. Shrimp' trawling wasidoneLonce/ month (January' - March) and-twice/ month (April, - December) at.4 s.tations- (Figure 2)-.and haul setning b1 weekly-during _ f, T June - November-.at 4 stations.(Figure 1). .t .+ II-2 m c q.h fj wy 1

W I, ',',

Monitoring is conducted 'of local lobster -stock catch statistics for

m

' areasf in the proximity of: Pilgrim Station (Figure 4);- Catch statts- !? tics Lare collected approximately~ biweekly throughout the fishing . season (May-November). .e =tr 1 'A finfish observational dive program was initiated in June 1978. '. SCUBA. gear: 1s. utilized 'on biweekly -dives from May-October.(weekly 1 -mid-August to mid-September) at 6 stations (Figure 2) in the PNPS thermal plume area. I IE ' lobster pot trawl monitving effort was 5 In 1986~, an experimental, i E g- ' initiated to eliminate aity biases associated with the coilection of ! g '. lobster.~ stock catch statistics :for determiningo PNPS' effects. ' Ten 5-potLibbster trawls were fished in the thermal plume and control ' areas around:PNPS (Figure 3), l 2 I' ; Results of the1 marine fisheries ; monitoring during the reporting ~ s l period are' presented-'in SectionflIIA.. g ll 2. 'Renthic Honitoring: j.B s i .The ' benthic : mont t'loringi descr.aed in this ' report was ~ conducted ' by. p 1 i '^ Science Applications; International Corp., Hoods Hole, MA. s I L 4 g> I; ? 11-3 w

.~. N Thelbenthic flora and fauna were sampled at three locations at depths i .o-f '10 feet (MLH) (Figure'l). Quantitative (rock substratum) samples were collected...and the. dominant flora and fauna in each plot were recorded. Sampling 'was conducted two times per year (March. and September),to determine blotic changes, if any. Transect. sampling q -offlthe discharge ~ canal to determine the extent of the denuded and 'l 9 stunted zones -is conducted four times a year (March, June, September and December). Results c.' the benthic surveys reported during this y;, periodiare' discussed in Section IIIB. i3;- <PI'ankton Monitoring = j i , Hartne Research. Inc. (MRI) of Falmouth, Massachusetts, has; been ni ) mont toring;entrainment -in!. Pilgrim-Station cooling water of-. fish eggs

r iand larvae, and',obster larvae (from 1973-1975-phytoplankton and j

zooplankton were 'also. studied). Figure 5 shows the entrainment' o 4 contingency 1 _sampilng. station; locations. Information generated s - through these . studies Lhas .been' utilized to -make' periodic l modifications in :the samp1.Ing program to more efficiently address the-question of the effect!of.entrainment. These modifications'have been-4 k' o- / developed by the co'ntractor,' and reviewed land approved ~by the. Pilgrim J -T : Committee on, the . dis of the program results. Planktori A l X ( D . monitoring-lIn 1990 Lemphasized -consideration: of Lichthyoplankton- ? W. / / entralnment. Results of the ichthyoplankton - entrainment; monitoring = b a .for'this reportingiperiod are discussed in Section IIIC.' [ I o ~ -{ p-J 11 4 o,- p - -I

p y ~ ~ ~~ I 4, l1moinaement Monitorina 1 N The -Pilgrim 1 impingement monitoring and survival program spectates,.. y ^ quantifies. and determines viability of the organisms carried onto the . four intake. traveling screens. Since January 1979, Marine. Research, luh Inc. has been conducting impingement sampling with results being 1 y . reported ~on by Boston Edison Company. A' new screen wash. sluiceway system was Installed at Pilgrim in 1979 .at a total cost of-approximately $150,000. This new slutceway: system 5l was : required by the U.S. Environmental Protection Agency and the> 2 m i'y . Mass. 01 vision of Hater Po110 tion Control as a part of NPOES Permit l '#MA0003557. Special ' fish survival studies conducted from 1980-1983 { .to determine its' effectiveness in protecting. marine life =were termin-Y

ated. In 1984,.- and

.I ar* on - them appears.in. Marine, Ecology- ~ Semi-AnnualnReport #23. g-I pt, I Results of' impingement monitoring - and : survival program ~ for ' this re-i 7 . orting-per.tod are discussed in SectioncIIID.: p .n p q 1. i 'C. Fish. Surveillance Studies 3;y e am . March f November, weekly fish spotting overflights were conducted as part q ~ f 'a Lcontinuing -effort to monitor the. times when large concentrations of o i fish might:be expected in the Pilgrim vicinity. l-An ' annual summary report for this effort for 1990 will be presented -in. I Seml Annual Report No. 37. s i T3 II-5. ~

Y s s D. Statlon-Ooerafdon Histgty, g

The-idaily average, reactor thermal

power levels from January through June

.1990 - ~are shown :in Figure 6.- As can be 1seen,- PHPS was in a normal-operating stage during most of this reporting period. p E.,1990 Environmental Proarami ~ r ? - A planning, schedule bar chart for 1990 environmental monitoring programs i .1, related to' the. operation of. Pilgrim Station, showing-' task activities and milestones from December.1989 ' June'1991, is included-as Figure.7. ,I Il Li 4 x-w ..j i s p. [ 's' [ t 3 .t y s I. II-6 g

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