ML19290A277
| ML19290A277 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 01/26/1977 |
| From: | Pasciak W Office of Nuclear Reactor Regulation |
| To: | Grimes B Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 7911010739 | |
| Download: ML19290A277 (3) | |
Text
{{#Wiki_filter:- A A" A -dU' - 7s e: .a. + i N E C 1977 O D b MEMORANDUM FOR: Brian K. Grimes, Chief, Environmental Evaluation Branch, DOR FROM: Walter J. Pasciak, Environmental Scientist, Environmental Evaluation Branch, DOR ,.THRU: Elinor G. Adansam. Section Leade:, Environmental .' s f. Evaluation Branch, DOR .s.
SUBJECT:
^I,I REVIEW OF IMPINCEMENT AND ENTRAINMENT MONITORING PROGRAMS ~ ",.Q:' AT THRRR MILE ISIAND NUCLEAR STATION .,r r,
- PLANT NAME: Three Mile Island Nuclear Station DOCKET NUMBER: 50-289 LICENSING STAGE: P-OL RESPONSIBLE BRANCHP Operating Reactors Branch No. 4 PROJECT MANAGER:
J. Zwetzig o s ~.:: ,.y c ;.. The Environmental Tech =4e=1 Specifications for Three Mile Island Unit No. 1. specify that impingement and entr=4mmmt biological monitoring programs shall be conducted for a two y'ar period after the plant becomes operational. e The specifications require that this program be extended beyond two years t. only if the data indicate that further information is necessary. J. Zwetzig, i l ORPM, asked us to review the results of the two year programs to determine whether further monitoring is necessary. He also prepared a letter to be sent to the licensee which allow ~ them to terminate the programs and requested { that you concur in it, if appropriate. I reviewed the two years of data and e*= elude that it is adequate, and therefore, recomunend that you concur in the letter. A summary of my review follows. The programs that will be terminated .are those of specifications 4.1.1.A. 4.1.1.B. and 4.1.1.C. 4.1.1.A Impingement: The specification requires that semi-monthly impingement sampling be made et 4 -bour intervals over a 24-hour period. The fish that are taken from the screens were required to be counted, weighed, and identified to lowest possible taxon. I 2 During 1974 and 1975 a total of 44 fish impingement surveys were made. A total of 1698 (4.3 kg) fish of 25 species were impinged. The average hourly impingement rate was 1.6 fish /hr (4.1 gm/hr). A very small percentage of these fishes were game fish. Most of them were forage species and trash species. Y 1010 g n7 P " "" " " ~.. .* r - ~ ~ :Tr ~ ~~ T:~_ /
y 7 h, 9 9
- 7 9
f l Brian K. crimas 'JAN f C C l i e I QT 9 Q ~(IU f f fb j\\ NNh The results of trapnet and seine sampling during 1974 and 1975 (a total of 18,741 fish were caught in the program) indicate a fairly extensive local fish population, although the exact extent of the population was not determined. We judge that the impinge-I, ment rate is small in comparison to the apparent size of the j population and therefore the impact of fish impingement is insig-nificant. A more extensive analysis will be done when the fish
- 1% tion monitoring program has been completed (December 1977).
t j y., - Details of the impingement program conducted by the licensee are contained in the 1974 and 1975 Annn=1 Raport. 3 V 4.1.1.3 E train =-at of Fish Eggs and Larvaa: The specification requires i ~~,,. th st semi-monthly entrain==nt sampling be made at 4-hour intervals ci ;r a 24-hour period. The specimena were to be counted, taxo-f-~ co=4e=11 7 identiflad, and their extent of mortality was to be t determined. l 3. ... g. :0 s. e' i ' V[ Q fc During the spaurning period (April -- Oc'tober) egg and larval fish . b'7: L, ? M '3 l47,-{ studies were done twice per month. Most of the eggs that were taken
- W wars. collected in May and Juna.. During the two year period a total Q. 'g 17% [rof.390 eggs, 234 larval fishes, and.13 juvenilas were taken in a b
..c total of 168 sempling periods. ' The snount of water that was filtered during each sampling period was 3 cubic meters. These entrain==nt [ . studies indicate that for most of the spawning period low densities of ichthyoplankton are found in the area and suggest that the impact l is acceptable.- The actual level of impact will be assessed when the . fish monitoring study is completed (December 1977). l ' 4.1.1.C Entra t of Plankton: The specification requires that semi-j monthly plankton sampling be made at 4-hour intervals over a 24-hour period. The samples were to be countad and determination of the j extent of mortality meda. Species were to be identified to the I lowr.st possible. taxon.. ' During 1974 and 1975 a total of 304 samples were collected during } 26 24-hour entrain = ant studies. The phytoplankton composition was sinflar in samples taken simultaneously at the intaka and discharae for a given date. The licensee performed paired t-tests on the S 3 320 x__ .ru k /' *" "" "~~ _ * ~ 7 .~ ~ ;" 7"
- w. -
4-I Brian K. Crimes 'E4# t d 5077 3 = I i t samples which indicate that the differences in abundance were not significant (P=.05) most of the time. As the intake and discharge samples were similar we judge that the plant is having a negligible impact on these populations. i V + ~ Walter J. Pasciak, Environmental Scientist Environmental Evaluation Branch i ,J ' Division of Operating Reactors-s,.. ' cc: w/o attachment V. Stallo l K. Coller L D. Eissnhut J. Zwetzig ~ t i B. Raid DISTRIBUTION: . : :., %', N,,.7 .t* Central Files t R..Em11ard #.,* ' ' ?. L f- [ ~ E. Adensad ', 4*,, l. 9; [. D!*y. EEB Reading _',[ ~ . ;'f. g *:54 ;n. _E .*.' ~ H. Pasciak r P'#) DeDavis .r ? j e i I t i I .r .inp;1 =2 oJ /$3& EEB/0T/40 EE / DOR E / /I)dR o,,,c., WPascidN: EA.[ ri . L] 1 1/ [77 .1/1f]77 .re v J18 (Rev. 9 53) AZOi 0240
- u. e. oovammusw? Paantino oresc.: ser..eae.see
-}}