ML18219D527
| ML18219D527 | |
| Person / Time | |
|---|---|
| Site: | Cook  |
| Issue date: | 12/28/1976 |
| From: | Tillinghast J Indiana Michigan Power Co, (Formerly Indiana & Michigan Power Co) |
| To: | Rusche B Office of Nuclear Reactor Regulation |
| References | |
| Download: ML18219D527 (17) | |
Text
U.S. NUCLEAR REGULATORV MISSION NAG FORM 195 (2-76)
NRC.DISTRIBUTION FOR PART 50 DOCKET MATERIAL DOCKET NUMBER
$0-3(S FILE NUMBER
%nuts Mr Rusche FROM: Indiana & Michigan Pwr Co New York, NY D G Hume DATE OF DOCUMENT12-28-76 DATE RECEIVED GALETTE R
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'NOTORIZED I7IUNCLASSIFIED PROP INPUT FORM NUMBER OF COPIES RECEIVED 3 signed DESCRIPTION Ltr notarized 12-28-76....trans the following:
ENCLOSU RE Amdt to OL/Change. to. the. Tech Specs:
Consist of revision to Appendix B with regard to periphyton collection methods...............
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INDIANA gt MICHIGAN POWER COMPANY P. O. BOX 18 BO WLI N G G R E EN STAT!ON NEW YORK, N. Y. 10004 Donald C. Cook Nuclear Plant Docket No. 50-315 License No. DPR-58 December 28, 1976 c'0CKg'ED ue>>~
Mr. Benard C. Rusche, Director Office of Nuclear Reactor Regulati U.S. Nuclear Regulatory Commission Washington, D.C.
20555
Dear Mr. Rusche:
This letter is a request for changes to our Appendix B Technical Specification Section 4.1.2.1.1.4 and Table 4.1.2-1.
". We have attached revised pages 4.1-21 and 4.2-6 to indicate the changes we propose.
Section 4.1.2.1.1.4, "Periphyton, " currently requires the use of artificial substrates set in the lake at specified locations for periphyton collection.
Dr. J.
C. Ayers of the Great Lakes Research Division of the University of Michigan, under whose direction all aquatic studies are performed at the site, believes that the objective of this section would be better served by diving to observe periphyton growth on the intake and discharge structures and the surrounding riprap and by analysis of samples hand collected during such dives.
(Such observations and sampling of periphyton are being carried out during the dives required by section 4.1.2.1.4)
The reasons for our request to modify this specification are:
1)
The natural conditions of shifting sand bottom and severe wave action along the shore of southeastern Lake Michigan are such that stable substrates are
- absent, and the region preoperationally was essentially devoid of periphyton.
Postoperationally, the region-is still essentially devoid of periphyton and post-operational bottom conditions are not different from preoperational conditions.
2)
The only substantial aggregation of periphyton between New Buffalo harbor 15 miles to the south 40%
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1 Mr. Benard C. Rusche December 28,'976 and St. Joseph harbor ll miles to the north is on the Coo'k Plant's submerged intake and discharge structures and the riprap surrounding them.
From these substrates we have preoperational (1973, 1974) and post operational data on species composition and growth, from visual inspection and collections by our divers.
3)
Periphyton organisms loosened from the intake structures by waves,
- currents, and winter ice are entrained into the plant where they are sampled monthly in entrained phytoplankton.
From these samples we have species compositions and organism densities for the preoperational months of 1975 and the postoperational months of 1975 and 1976.
From items 2. and 3. immediately above, we receive (from an existing periphyton community) more data than could be obtained from artificial substrates deployed in April through November and harvested in May through November, as Specification 4.1.2.1.1.4, now requires.
5)
From items 2.
and 3. above, we receive data ideally suited to determinations of abundance
- changes, changes in population composition, changes in diversity, or changes in other population parameters which might be due to plant operation as Specification 4.1.2.1.1.4~I requires.
6)
The use of artificial substrates at 1 meter below stillwater level, as Specification 4.1.2.1.1.4..
now
- requires, would 'be open to the dual criticisms that the substrate might differentially favor or suppress colonization by periphytic organisms (thus acquiring a population different from that on Cook Plant's iron and stone) and that differences in amounts of light reaching the artificial collectors and the riprap might produce differences between the populations (this is pointed out in the Specification).
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Mr. Benard C. Rusche 3
December 28,,
1976 Therefore, we request that section 4.1.2.1.1.4< be changed as shown on the attacheQ revised pages 4.1-21 and 4.2-6.
A diving schedule consistent with section 4.1.2.1.4.
is included.
In addition we request a change in the schedule of fish larvae tows in the lake as specified in Table 4.1.2-1, (also on page 4.2-6).
The fish section of this table indicates that fish larvae open water field samples, also used for fish egg collection, shall be taken April-November during ecological monitoring of the Cook Plant,.
During October and November we are presently required to sample for fish larvae and eggs at the following open water stations:
Stations C and DSouth Cook at the 20 and 30 foot contours; Station G and Hat the 20 and 30 foot contours off Warren Dunes State Park; and Station INorth Cook at the 20 foot contour.
The accompanying table gives the results of our field larvae open water sampling for 1973-75.
In summary, no larvae or eggs were collected in October 1973 at any station.
November was not sampled Que to bad weather.
In 1974 a few alewife larvae (34/1000m3 at the suxface and 60/1000m3 at.
8m) were collected at Station H, Warren Dunes.
No other larvae were collected in either month during 1974.
In October
- 1975, 168 alewife larvae/1000m3 were captured at Station G, Warren Dunes.
At Station C, South Cook, 131 trout-perch larvae/1000m3 were also taken in October.
No othex larvae were taken in either month during 1975.
No fish eggs have been collected in any open water field tows during October-November of 1973-1975.
The above data may be compared with that of our 1973 annual report, Section C"Vertical, diel and seasonal distribution of fish larvae and eggs in the inshore waters of southeastexn Lake Michigan" (In:
Inshore Lake Michigan fish populations near the Donald C. Cook Nuclear Plant, 1973.
Jude et al.,
1975.
Spec.
Rep.
No.
52, Gxeat Lakes Research Division, Univ. of Mich., Ann Arbor).
This section demon-strates that many more larvae and eggs are collected during peak fish spawning periods in the study area (spring-summer) than in October and November.
Larvae and eggs in spring and
it t
1 Mr. Benard C. Rusche December 28~,
1976 summer samples frequently reach thousands of organisms per 1000m
. It is evident from our data that October and November larvae sampling occurs well after most fish have spawned in the study axea.
In addition, no larvae of any Great Lakes fish known to spawn in lakes during fall and winter have ever been observed in October-November field larvae samples.
Such fall-winter spawners would include lake herxing, fourhorn (deepwater)
- sculpin, lake whitefish, brown trout, brook trout,
- burbot, lake trout and bloater.
Relative scarcity of these species in the study area is believed to be responsible for absence of their larvae.
Alewives, spottail shiners and smelt, whose larvae are frequently encountered in the study area numerically comprised 95.5% of our standard series catch in 1973 and 93.2%
in 1974.
To date we have nevex captured brook trout.
Fourhorn sculpin, lake herxing, and bloater prefer deeper
(
30 ft.) water for spawning.
Burbot spawn later in south-ern Lake Michigan, probably into December and January (indicated by our gonad data).
Lake trout are reported to spawn over rocks and rubble rather than over sand,.
Brown and brook trout spawn more often in rivers and streams than in lakes.
Because we collect so few larvae and no eggs in October and November, and because fall-winter spawners do not appear to breed
'near the Cook plant during these
- months, we pxopose omission of October and November open water field larvae sampling in the futuxe.
This would include stations C,D,G,H, and I, described above.
We believe we have already obtained sufficient data regarding October-November fish larvae and egg abundance and identity to justify this request for the change shown on the bottom of the attached revised page 4.2-6.
These proposed changes would not change the intent of the specifications which are to monitor periphyton as an indicator of the effects of Cook Nuclear p3:ant operation
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Mr. Benard C. Rusche December 28;.
1976 on the actuatic environment, and to determine the environmental impact. of plant operation on the fish populations in the vicinity of the plant.
Very truly yours, JT:mam Attachment xg st Vice Presid t Sworn an/ subscribed to before me this RE day of December, 1976 in New York County, New York Notary Public DAVIDG. HUME NOTARY PUBLIC, Stefe of New York No. 314608113 Quelified in New York Counly Commission Expires Merch 30, 1977 cc:
G. Charno ff R. C. Callen P.
W. Steketee R. Walsh R. J. Vollen R.
W. Jurgensen Bridgman R. S. Hunter
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TABLE 1.
Number of fish larvae
(<25.4 mm total length) per 1000 m
captured during 3
October and November of 1973, 1974 and 1975 from the Cook Plant and Warren Dunes open water stations.
Larvae tows only.
AL = alewife, TP. = trout-perch.
C\\
Honth C
6n-S.
Cook Depth(m)
Day Night el D
G 6a-N.
Cook 9m-S.
Cook 6a-N. Dunes Day Night Day Night Day Night H
8
> M 9n-M. Dunes
- 21.2/n-Cook
- 21.4n<<w. Dunes Day Night Day Night Day Night Oct Nov 0
(8)*
2 (14)*
ST (20)*
0 1
2 ST 0
0 0
0 0
0 0
0 0
0 0
0 1973 0
0 0
0 0
0 0
0 0
0
.0 0
0 0
0 0
0 0
0 0
0 0
0 0
Oct Nov 0
2 4
6 8
0 2
4 6
8 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
1974 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0
~
0 0
0 34AL 0
0 0
0' 0
0
'0AL 0
0 0
0 0
Oct 0
(8)*
4 (14)*
6 (20)*
8 0
0 0
0 0
131TP 0
0 0
0 0 '
0 0
0 0
0 0,
0 0
1975 0
0
'0 0
0 0
0 0
0 0
0 168AL 0.
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
Nov 0
0 2
(8)e' 4 (14)*
0 6 (20)*
0 8
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0
<The depths for tous.at stations E and N are given in parenthesis.
S ecification Field Method Periphyton on the intake and discharge structures and the sur-rounding riprap shall be visually inspected and samples hand-collected during the months of April through October (see Specification 4.1.2.1.4.).
Monthly samples of entrained phytoplankton at the intake shall be examined 'for periphytic species and the abundances thereof obtained.
'reservation of samples shall be the same as for samples collected in the regular sampling scheme of the general ecological survey.
Labator Method The laboratory methods used shall be the same as those used for phytoplankton in the regular sampling scheme of the general ecological surveysee Specification 4.1.2.1.1.2. except th'at each month from April through October a wet-mounted sample from
.the intake structure shall be examined also.
Re ortin Re uirement As"specified in Section 5.4.
Basis Periphyton are attached algae growing upon solid substrates, consequently they are fixed in position.
Ef their substrates are located where the Plant 'discharge can reach them, the periphyton may respond.by abundance
- changes, changes in population composition, changes in diversity, or changes in other population parameters.
Statistically significant differences between preoperational and operational population parameters will be noted gnd the relationship to Plane operation investigated.
- 4. 1-21
TABLE 4.1.2-1 (Continued)
MONTHS AND STATIONS USED FOR GENERA ECOLOGICAL SURVEY (See. Table 4.1.2-2 for transect locations and distances from shore) 30 stations (as shown below)
Inner 0
SDC-l-l SDC-.5-1 DC-1 NDC-. 5-1 NDC-l-l Zone SDC-1-2 SDC-.25-1 DC-2 NDC-.25-1 NDC-1-2 SDC-1-3 SDC-.5-3 DC-3 DC-4 NDC-.5-3 Outer SDC-7-1 SDC-4-1 SDC-2-1 NDC-4-1 NDC-7-1 SDC-7-3 SDC-7-2 SDC-2-3 NDC-2-3 NDC-7-3 SDC-7-5 SDC-7-4 SDC-4-3 NDC-4-3 NDC-7-5
~Divin Months:
7 (April, May, June, July, August, September, October)
One sample from the intake structure to be examined in'et-mount each month.
Entrained Peri h ton Months:
1'2 Fish Duplicate samples from the intake forebay shall, each month, be identified and counted by the method used for phytoplankton in the regular sampling scheme of the general ecological survey.
Months:
8 (APril through November)
Eleven permanent stations were established in the area of the Cook Plant and Warren Dunes State Park (control site).
Two seining stations (A and B) north and south of the plant and three gillnetting, trawling and fish larvae stations (C and D) south of the plant and I north of the plant in 20 and 30 feet of water were established.
A gillnetting station is located at station J north of the plant (30 ft of water).
A fish larvae station (E) in 70 feet of water was also established for the months of April through August.
At Warren Dunes State Park (control location) one seining station (F); two stations (G and H) in water. depths of 20 and 30 'feet for gillnetting, trawling and fish larvae; and one station (H) fished during April'through August at, 70
. foot of water. depth for fish larvae were established.
Fish larvae tows shall be conducted at ten stations.
No fish larvae tows need be taken during October and November..
4.2-6
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