ML20044B001
| ML20044B001 | |
| Person / Time | |
|---|---|
| Site: | Palisades, Big Rock Point, Midland File:Consumers Energy icon.png |
| Issue date: | 03/29/1990 |
| From: | Scott D AFFILIATION NOT ASSIGNED |
| To: | Carre K Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20044A989 | List: |
| References | |
| NUDOCS 9007170152 | |
| Download: ML20044B001 (4) | |
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e Northern. Michigan Eco-Watch F.0.
Box 631 Fetoskey. MI 49770 c
M#liasch 1990.
t eAnneth Caire IJuelearEheactor hegulation Operating Reactors Branch No. 2 Washington.
D.C.
20555 Deat ~ llr. Ca r te,.
We recentiv obtained a copy on the'blG ROCK P0lNT.-
'AFPLICATION FOR DISPOSAL OF DREDGED DISCHARGE CAllAL SEDIMEl4T dated 29 December 1989.
In our review of the document. we were alarmed by the manner in which data were handled-in i
.calculatang dose to the public.
Our' concern rests an the use os activity levels for gross beta. Sr90, Mn54.- Co60 Cs1S*. and Cs137.
In all cases, the activity level tpClig1
-used-in calculating oft-site dose was' based.on. averaging results for' isotope activity levels derived from semi-annual sampies collected f rom June 1965 through September 1990 and
-resultu tor isotope-activity. levels derived fromLthe special' sedtmont sampies colIected irom the proposed dredge area on 4
17 June 1990.-
Collection orEthese special sediment samples was. tor the purpose 01 ascertatning activity levels in-the pioposed=diedge crea.
Quite notably activity levels for C060. MnS4. and Cs137.were in nearly all cases substantially greater than ~ levels reported from semi-annual-samples.
1he t o ri l e below illustrates average activity levels for each.
1sotope based on three averaging methocs 01-3) and gives the satic or these averaging methods (A and B):
-g Average of isotope cased on Dredge _ Samples of 1
=
17 June 1990
= neerage or Isotope based on Dredge Samples and m
bem4 onnu,I sampies over the perlod June 1985-september 1990.
Values used'in calculating off-cite dose.
h.* Avenage of Isutupe based on Semi-annual samples over th* Jun-1965-September 1990 period.
Dredge sample sesnits emoveo.
m = netto or Isotope activity level in column i divided by the1 1iom coaumn i hotio ut Isotope cet.1vits leven in column 1 divided be b
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Averaging Nethod Ratio 1
g-4 isotope 1
2 3
A B
Co60 2.656 0.431 0.208 6.162 12.77 linbu 0.818 0.202 0.151 4.o50 5.417 Cs137 1.089 0.605 0.557 1.600 1.955 4.===
hatios in Column A indicate the disparity between actual dredge sample activity levels and'avirages used in dose errect'to the public calculations... Ratios in Column B indicate the disparity between actu)1 dredge sample activity levele and averages derived from semi-annual samples.
It is our contention that dose to the public should be omhedL not an average from on averages 11om dredge samples only 1965 thiough 1990.
It appears to uc that averaging dredge samples with semi-annual samples is an ettort to make dose l eve i ts t o T he pubtic appear less than they really are.
s i ncer 'the purpose of the dredge samples was to determine act)12ty levels an the dredge area, they represent the coirect values to be-used in off-site dose levels.
.We i e q qff s t ihat you iequi e 1he ps opet venues be used and a ne,w seport.be pr esented. With a copy sent to our organization.
h a d i 1. t u n a i l y, we re. quest, that you investighte whv activity leveis weie so much higher l'n dredge sampl9s ret..uive to semi-annual s anip l e s (Column bl.
Is these a di t t er ence in whei a semi-annual samples are collected relative to where useope samples were collected"r 11 there is no difference, why are actsvaty levels in semi-annual samples so much lower than in-dredge samples l!
i ti laSht of the above. P lease review assumptions ano tates utils ed in calculating dose etrect for ground shine, inholation. and grouno water contamination.
Errors in rstec or ossumptions in the many equations used in dose e f f e c t.
c r i c u l a.t t o n s may lead to undetermined risk to the pubito.
n-We conssues the dredge'spotts low-level radioactive waste, I
tot thlf teeson. W e.. r e q u e.c t that the dredge spoils be consJorieu bud tsoeted as such.
Acco r d ilig to the 1960 r e rio r r i. o the Hachigen Low-Levet Radionctive waste Author 3tv t*< tm i onmental hesourcos ManaFement of Ann Arbor, 11 1. b1e ri.&
F lut ic not e suitable site for low-level radioactive
.-r'e una to s e v er s a l factors not the teast of which is that X:ouna
..te 1s only 10 feet below the surlace.
It the ai a>o ei*nti2 ate not determined tu be iow-leve1 iaoicactive w>ste, we request an. explanation detaaiIng what they are and
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the iustatication for on-stte storage.
11 a diedge permit 15 3 E M8ed. R.sequest.that the dredge spoils.be shipped to en <ippioved low-level radioactive disposal site.
fin,1Iv. we appreciate your attention to our concerns and ve.juest to be kept informed as the dredge permit issuance.
We request thet we receive any subs
'iie n t updates to the on a e i ne l dawdge spoiIs activitv iepost citwd a t.
the tie g i rin i n g ot this letter-or responses to this letter.
Given the nunibe r on well-founded concerns, we_r;eguest that the d i t-c y e po s ni t t be denied until there is a solution to the paoblems noted above.
For n>&miers of 14o thern Michigan Eco-Watch, g{
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D6te Scott Michael Winnell Annie ho2Vvgi F e t o wiit Vice-Fresident Treasurer copy cent to:
Governor Jamec Bianchard. c/o Carol Linteau US h ontor Car 1 Levin state Senator Hitch Irwin c/o Julie Millie henneth Carre. 14hC - Nuc l ea r heactor hegulation
- bt d Wiikins. MDl4R
.l o h n elevelo. HDidh ferty Clerk. Petoskey News heview
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Big Rock dredging ro oged
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land disposal site used for the HAYES TWP. - Consumers \\~ Consumers proposes by mechanleal means an inilla! causeway, Power Co. h.s applied to the state 600 cuble yards of materialfrom a?
Interested individuals have un.
til Monday, Dec.19, to comment Department of Natural Resources.(DNR) and the U.S. Arvny Corps, 44foot on the project or request a pubuc of Engineers for permits to domaintenance dredging and con. Iow the water. There c
254500.euble ' yardsdredged on an annual basis if 're, m will be servet a temporary causeway in lake Michigan at the Big Rocke quauty -certification should be.
quired.
1 A temporary causew'ay 20' feet filed with the state of Michigan, '
. Point nuclear plant, The pumose of the proposed by 200 feet is. proposed for use. Land and Water Management Di.
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' rojectis to maintain a clear area around the discharge frotn the. when the lake level does not allow vision, P.O. Box 30028, Stever.s T."'
p neway would be removed each
- Mason Building, Lans for barge type dredging.The cau.
plant.
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Big < Rock Public Affairs Direc-tor Charles MacInnis said the year after dredging is complete.t et
, c rtl o
Jnatorial would be placed on work is an expansion of existing
. Consumer's property upland above the high water rnark with. Engineer, Detroit District, Co dredging for which the company already has a permit. It extends no return to any waterway or wet. ' "h'h.
f the dredging about 100 yards far.
All. commurilcaiSn*.should, d land.
ther into the lake.
The dredged material will be s refer to file number 86-56143A/86 b, '----'
'te The water discharged from the plant is about 20 degrees warmer' used along with existing 'onsite as an indicatioh there is no objec ' '
6-3950. Alackof responselataken condense steam in the plant's'turp. temporary causeway with all ex. cess material pl
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