ML20154A758

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Forwards Amend 1 to Util 780602 Ltr Re Compliance w/10CFR50, App I.Amend 1 Contains Radiological Dose Assessment & Updated Meteorological Dispersion Parameters Used in Dose Calculations.Addl Info Will Be Submitted by 761011
ML20154A758
Person / Time
Site: Maine Yankee
Issue date: 08/31/1976
From: French J
Maine Yankee
To: Reid R
Office of Nuclear Reactor Regulation
Shared Package
ML20153H396 List:
References
8960, WMY-76-90, NUDOCS 8805160144
Download: ML20154A758 (37)
v • d • e


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  • T URNME ROAD WT. O WEST BORO, MASS ACHUSETTS 01581 g ENGINEERING OF FICE 617-3G0 -9011

$ WY 76-90 August 31, 1976

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Washington, D. C. 20555 y kJ f L,j,) -

Attention: Office of fluclear Reactor Regulation

3% SEP 31976n Mr. Robert W. Reid h"'NnDI M "Winshs References (1) License No. DPR-36 (Docket tio. 50-309)' /

(2) NRC letter dated February 18, 1976  % '

(3) Maine Yankee letter to NRC dated June 2, 1976, WMY 76-62 (4) URC letter dated July 8, 1976 Dear Sirt In your letter to Maine Yankee Atomic Power Company (Reference 2),

you requested that certain information oc supplied for the purpose of (3 evaluating the stations compliance with Appendix I to 10 CFR 50. Maine

() Yankee submitted on June 2, 1976 (Reference 3) that portion of the information you requested which meets the requirements of Section V.B.

of Appendix I, and indicated that in addition radiological dose analyses would be performed by Maine Yankee and submitted to the Commission.

The enclosure to this letter contains Amendment 1 to Maine Yankee's original sutnittal of information for use in the Appendix I evaluation (Reference 3). A.endment 1 contains both the radiological dose assess-ment for Maine Yankee's demonstration of compliance with Appendix I, as well as updated meteorological dispersion parameters which were used in the dose calculations. A recent review of the meteorological literature relative to the calculation of deposition rates indicates that the most generally used approach involves the method of plume depletion and deposition velocity. This approach was used to recal-culate the X/Q and D/Q values in an attempt to use as realistic modeling as available.

Amendment 1 should te inserted into Maine Yankee's June 2, 1976 submittal (Appendix I Feport) in accordance with the attached instruction sheet.

l The additional information you requested in your letter of July 8, 1976 (Reference 4) is being prepared, and will be submitted as an amendment to the Appendix I Acport by October 11, 1976. Included i p in this submittal will te a detailed description of the meteorological  !

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  • modeling which has been used. i 8960 8805160144 880506 PDR ADOCK 05000309 p PDR J

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UnitedStates!$uclearRegulatoryCommission August 31, 1976 Attn of fice of 11uclear Reactor Regulation Page Two

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Any questions regarding this subtnittal should be directed to Mr. Peter Littlefield, at our Engineering Office in Westborough, Massachusetts.

Very truly yours, MAINE YANKEE ATOMIC POWER COMPANY

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m v 7. L. French Manager of Operations Enclosure D

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Amend:ent 1

  • August 31, 1976 4

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I Amendment I to O

Supplement Information For the Purposes of Evaluation of 10 CFR Part 50, Appendix I for l l

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MAINE YANKEE ATOMIC POWER STATION I

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, August 31, 1976 4

,3 MAINE YANKEE ATOMIC POWER COMPANY O License No. DPR-36 Docket No. 50-309 Instructions For Entering Amendment 1 to the report entitled "Supplemental Information For the Purposes of Evaluation of 10 CFR Part 50, Appendix I".

Remove A,dd New Tabic of Contents Table of Contents Page II-1 Page 11-1 Table QII.3-1 Table QII.3-1

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i Table QII.3-2 Table QII.3-2 Table QII.3-3 Table QII.3-4 Section IV O

Page i

e 4 . Amendment 1 August 31, 1976 Contents O

Introduction Page i

I. Response to NRC's letter of I-1 February 18, 1976 II. Meteorology 11-1 III. Technical Specifications for Radioactive Effluents III-1 IV. Radiological Dose Assessment IV-1 r

Appendix A. Nuclear Regulatory Commission's letter A-1 to Maine Yankee dated February 18, 1976 Appendix B. Data Needed For Radioactive Source Term B-1 Calculations for Pressurized Water Reactors (Appendix D of Regulatory Guide 1.BB)

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. Amendment 1

. August 31, 1976 Section II Meteorology Data collected from the Maine Yankee onsite meteorological system was analy:ed for the period April 1,1975 through March 31, 1976. The annual and monthly joint frequency distributions of wind speed and direction by atmospheric stability class in Table Q11.6-1 provide a detailed description of the meteorological data. A 98.2 percent data recoverability was achieved for the period of record.

The Straight-Line Airflow Model, with appropriate source configuration con-siderations as described in NRC Regulatory Guide 1.111, the source-Depletion Model as described in Meteorology and Atomic Energy (1968) and deposition velocities as given by Pelletier and Zimbrick (1970) were used to determine the X/Q and D/Q values for specific downwind receptors as provided in Tables QII.3-1 O through QII.3-4. Site specific recirculation correction factors, for a coastal site, are in the process of being developed with the use of appropriate mesoscale diffusion models.

The following site specific parameters and assumptions were used in the cal-culation of X/Q and D/Q values.

A. Primary vent stack release:

1. Mixed release mode
2. Physical height of the release point above ground: 53 meters
3. 'Inside diameter of stack: 2,07 meters
4. Vertical exit velocity of plume: 12.9 meters /second
5. Maximum adjacent building height: 45 meters l

l o. Depth of mixing layer: 900 meters

7. Average ambient air temperature: 280'K
8. Recirculation correction factors: 1.0 ..

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TABLE Q II.3-1

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MAINE YANKEE: PRIMARY VENT STACK X/Q, D/Q VALUES FOR SELECTED RECEPTORS (ANNUAL) l Radial Milk Meat Milk Nearest Residence Site l Sector -

Cow Animal Goat and Vegetable Garden Boundary l

l N Distance (miles) 1.7 1.3 >5.0 0.9 0.76 i Terrain lleight (fect) 80 80 80 60 * .

X/Q (undepleted) 1.799 E-07 2.108 E-07 2.438 E-07 1.907 E-07 i X/Q (depleted) 1.763 E-07 2.071 E-07 2.393 E-07 1.857 E-07 ,

j D/Q 7.227 E-10 9.228 E-10 1.235 E-09 1.120 E-09 -

NNE Distance (miles) 4.6 4.6 >5.0 1.3 0.85 Terrain lleight (feet) 200 200 120 120 X/Q (undepicted) 1.755 E-07 1.755 E-07 4.631 E-07 6.309 E-07 X/Q (depleted) 1.639 E-07 1.639 E-07 4.542 E-07 6.201 E-07 D/Q 5.383 E-10 5.383 E-10 2.239 E-09 3.464 E-09 NE Distance (miles) 4.2 4.2 4.9 0.7 0.23 Terrain Height (feet) 220 220 220 40 20 X/Q (undepleted) 1.999 E-07 1.999 E-07 1.612 E-07 2.544 E-07 6.543 E-07 X/Q (depicted) 1.872 E-07 1.872 E-07 1.489 E-07 2.444 E-07 6.196 E-07 D/Q 6.193 E-10 6.193 E-10 4.906 E-10 1.718 E-09 4.874 E-09 ENE Distance (miles) 2.4 2.4 >5.0 0.6 0.19 Terrain IIcight (feet) 223 223 20 0 X/Q (undepleted) 2.366 E-07 2.366 E-07 7.449 E-08 2.634 E-07 X/Q (depicted) 2.302 E-07 2.302 E-07 7.065 E-03 2.483 E-07 D/Q 6.418 E-10 6.418 E-10 4.587 E-10 1.735 E-09 E ST E Distance (miles) 3.3 3.3 >5.0 0.5 0.13  ?*

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Terrain lleight (feet) 220 220 66 0 "S

, X/Q (undepleted) 1.526 E-07 1.526 E-07 9.596 E-08 3.638 E-07 '

35 X/Q (depicted) 1.474 E-07 1.474 E-07 9.246 E-08 3.460 E-07 -

i D/Q 3.290 E-10 3.290 E-10 6.320 E-10 2.842 E-09 E u

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  • TABLE Q 11.3-1 (con't)

O MAINE YANKEE: PRIMARY VENT STACK X/Q D/Q VALUES FOR SELECTED RECEPTORS (ANNUAL)

Radial Milk Meat Milk Nearest Residence Site Sector -

Cow Aniral Goat and Vegetable Garden Boundary ESE Distance (miles) >5. 0 >5.0 >5.0 0.8 0.13 Terrain Height (feet) 80 0 X/Q (undepleted) 1.011 E-07 4.246 E-07 X/Q (depleted) 9.848 E-08 3.976 E-07 ,

D/Q 4.900 E-10 2.548 E-09

  • SE Distance (miles) >5.0 >5.0 >5.0 0.4 0.17 Terrain IIcight (feet) 10 0 X/Q (undepleted) 2.234 E-07 7.216 E-07 X/Q (depleted) 2.099 E-07 6.847 E-07 D/Q l.773 E-09 5.619 E-09 SSE Distance (miles) >$.0 0.5 5.0 0.5 0.13 Terrain !!eight (feet) 10 160 10 0 X/Q (undepleted) 2.840 E-07 9.642 E-08 2.840 E-07 1.673 E-06 X/Q (depleted) 2.679 E-07 9.021 E-08 2.679 E-07 1.593 E-06 D/Q 2.238 E-09 3.579 E-10 2.238 E-09 1.311 E-08 S Distance (miles) >5.0 >5.0 >5.0 0.9 0.08 Terrain ileight (fect) 40 0 X/Q (undepicted) 2.100 E-07 3.813 E-06 X/Q (depleted) 2.027 E-07 3.648 E-06 D/Q l.332 E-09 2.715 E-08 EC i! 3 55w Distance (miles) >5.0 4.0 3.2 1.9 0.08 gg Terrain IIcight (feet) 100 100 40 0 ,,g X/Q (undepleted) 7.943 E-08 1.OU3 E-07 1.147 E-07 2.899 E-06  ;- a X/Q (depleted] 7.573 E-08 9.641 E-08 1.112 E-07 2.793 E-06 _~

D/Q 3.046 E-10 4.098 E-10 6.011 E-10 2.123 E-08

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TABLE Q II.3-1 (con't)

MAINE YANKEE: PRIMARY VENT STACK ,

X/Q, D/Q VALUES FOR SELECTED RECEPTORS (ANNUAL)

Radial Milk Meat Milk Nearest Residence Site >

Sector -

Cow Animal Goat and Vegetable Garden Boundary SW Distance (miles) 4.6 4.0 >5.0 2.3 .0.57 Terrain Ileight (feet) 161 140 100 40 -

j X/Q (undepleted) 1.126 E-07 1.149 E-07 ',1.462 E-07 1.696 E-07 X/Q (depleted) 1.071 E-07 1.101 E-C7 1.423 E-07 1.625 E-07

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D/Q 3.045 E-10 3.349 E-10 5.349 E-10 '9.581'E-10 -

WSW bistance (miles) >5.0 >5.0 >5.0 1.2 0.47-Terrain lleight (feet) . 80 60' X/Q (undepleted) 1.152 E-07 9.969 E-08 X/Q (depleted) 1.135 E-07 9.579 E-08 D/Q 4.149 E-10 4.939 E-10 ,

W Distance (miles) 4.4' 4.4 >5.0 0.5 0.42 ,

Terrain Height (feet) 200 200 '100 100 X/Q (undepleted) 7.836 E-08 7.836 E-08 1.217 E-07 1.195 E-07

, X/Q (depleted) 7.485 E-08 7.485 E-08 1.198 E-07 1.173 E-07.

D/Q 1.331 E-10 1.331 E-10 7.423 E-10 8.058 E-10 WNW Distance (miles) >5.0 4.6 3.9 1.2 0.42 Terrain lleight (feet) ' 227 227- 80 80 X/Q (undepleted) 8.052 E-08 1.013 E-07 8.424 E-08' 7.237 E-08 X/Q (depleted) 7.647 E-08 9.723 E-08 8.339 E-08 7.068 E-08 D/Q 1.150 E-10 1.475 E-10' 2.855 E-10 4.865 E-10 NW Distance (miles) >5.0 3.0 3.0 1.2 0.47.

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Terrain Height (feet) 220 220 80 "5 X/Q (undepleted) 1.727 E-07 1.727 E-07 ' 1.027 E-07 '8.449 E-08 $ 5=

X/Q (depleted) 1.682 E-07 1.682 E-07 1.017 E-07 8.273 E-08 -

D/Q 2.746 E-10 2.746 E-10 .3.357 E-10 4.226 E-10 G 3

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  • MAINE YANKEE: PRIMARY VENT STACK l X/Q, D/Q VALUES FOR SELECTED RECEPTORS (ANNUAL)

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! Radial Milk Meat Milk Nearest Residence Site' l Sector -

Cow Animal Goat and Vegetable Garden "Boundary i

NNW Distance (miles) >5.0 1.1 >5.0 0.60 0.60' ,

. Terrain lleight (feet) 60 20 20 -

} X/Q (undepicted) 7.230 E-08 3.940 E-08 3.940 E-08 X/Q (depleted) 7.135 E-08 3.732 E-08 3.792 E-08 ,

r 2.329 E-10 D/Q 2.762 E-10 2.329 E-10.

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TABLE Q II.3-2 MAINE YANKEE: 'RJRBINE BUILDING VENT .

X/Q, D/Q VALUES FOR SELECTED RECEPTORS (ANNUAL) l l

Radial Milk Meat Milk Nearest Residence Site Sector -

Cow Aninal Goat and Vegetable Garden Boundary

, N Distance (miles) 1.7 1.3 >5.0 0.90 0.76 ,

l Terrain Height (feet) 80 80 80 60 X/Q (undepleted) 5.369 E-07 7.793 E-07 1.335 E-06 1.751 E-06 X/Q (depleted) 4.462 E-07 6.618 E-07 1.160 E-06 1.534 E-06 -

j D/Q 1.238 E-09 1.852 E-09 3.266 E-09 4.301 E-09 NNE Distance (miles) 4.6 4.6 >5.0 1.3 0.85 Terrain Height (feet) 200 200 120 120 X/Q (undepleted) 1.760 E-07 1.760 E-07 1.025 E-06 1.909 E-06 X/Q (depleted) 1.294 E-07 1.294 E-07 8.686 E-07 1.660 E-06 D/Q 4.470 E-10 4.470 E-10 3.104 E-09 5.968 E-09 NE Distance (miles) 4.2 4.2 4.9 0.7 0.23 Terrain Height (feet) 220 220 220 40 20 X/Q (undepleted) 1.874 E-07 1.874 E-07 1.520 E-07 2.443 E-06 1.495 E-05 X/Q (depleted) 1.383 E-07 1.383 E-07 1.094 E-07 2.134 E-06 1.357 E-05 D/Q 4.917 E-10 4.917 E-10 3.890 E-10 7.853 E-09 4.678 E-08 ENE Distance (miles) 2.4 2.4 >5.0 0.60 0.19 Terrain Height (feet) 223 223 20 0 X/Q (undepicted) 2.089 E-07 2.089 E-07 1.561 E-06 1.055 E-05 X/Q (depleted) 1.639 E-07 1.639 E-07 1.359 E-06 9.558 E-06 D/Q 4.785 E-10 4.785 E-10 4.045 E-09 2.673 E-08 Elf Ta E Distance (miles) 3.3 3.3 >5.0 0.50 0.13 n @-

Terrain Height (feet) 220 220 66 0 mg X/Q (undepleted) 1.405 E-07 1.405 E-07 2.193 E-06 2.163 E-05  !" "

X/Q (depleted) 1.029 E-07 1.029 E-07 1.897 E-09 1.969 E-05 **

D/Q 2.424 E-10 2.424 E-10 4.565 E-09 4.415 E-08

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TABLE Q II.3-2 (con't)

MAINE YANKEE: TURBINE BUILDING VENT -

X/Q, D/Q VALUES FOR SELECTED RECEPTORS (ANNUAL)

Radial Milk Meat Milk Nearest Residence Site Sector -

Cow Animal Goat and Vegetable Garden' Boundary J

ESE Distance (miles) -

>5.0 >E.0 >5.0 0.8 0.13-Terrain Height (feet) 80' .

0 -

X/Q (undepleted) 7.855 E-07 1.599 E-05 X/Q (depicted) 6.766 E-07 1.471 E-05 ,

i D/Q 2.011 E-09 4.263 E-08

  • i SE Distance (miles) >5.0 >5.0 >5.0 0.4 0.17 Terrain Height (feet) 10 0 X/Q (undepleted) 3.483 E-06 1.437 E-05

, X/Q (depleted) 3.111 E-06 1.316 E-05 D/Q 1.207 E-08 4.743 E-08 SSE Distance (miles) >5.0 0.5 - 5.0 0.5 0.13 Terrain Height (feet) 10 160 10 .

0

-X/Q (undepleted) 3.275 E-06 1.120 E-07 3.275 E-06 2.977 E-05 I

X/Q (depleted) 2.903 E-06 8.041 E-08 2.903 E-06 2.748 E-05 l D/Q 1.203 E-08 3.166 E-10 1.203 E-08 1.026 E-07

S Distance (miles) >5.0 >5.0 >5.0 0.90 0.08 I Terrain Height (feet) 40 0 X/Q (undepleted) 1.267 E-06 8.156-E-05 X/Q (depleted) 1.093 E-06 7.653 E-05 D/Q 4.074 E-09 2.629 E-07 c?N SSW Distance (miles) >5.0 4.0 3.2 1.9 0.08 = o-Terrain Height (feet) 100 100 40 0 "l X/Q (undepleted) 1.455 E-07 1.994 E-07 4.138 E-07 7.701 E-05  ;" "

X/Q (depleted) 1.074 E-07 1.521 E-07 3.363 E 7.220 E-05 -

D/Q 3.466 E-10 4.943 E-10 1.119 E-09 2.235 E .

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TABLE Q II.3-2 (con't)

J MAINE YANKEE: TURBINE BUILDING VENT i

X/Q, D/Q VALUES FOR SELECTED RECEPTORS (ANNUAL)

Radial Milk Meat Milk Nearest Residence Site Sector -

Cow Animal Goat and Vegetable Garden Boundary SW Distance (miles) 4.6 4.0 >5.0 2.3 0.57 i 100 40

Terrain lleight (feet) 161 140 .

X/Q (undepleted) 1.370 E-07 1.657 E-07 3.599 E-07 2.833 E-06 X/Q (depleted) 9.758 E-08 1.209 E-07 2.839 E-07 2.473 E-06 ,

D/Q 2.667 E-10 3.306 E-10 7.889 E-10 6.993 E-09

  • WSW Distance (miles) 25.0 >5.0 >5.0 1.2 0.47 Terrain lleight (feet) 80 60 X/Q (und.epleted) 6.238 E-07 -2.734 E-06
X/Q (depleted) 5.195 E-07 2.389 E-06 3 D/Q 1.286 E-09 5.893 E-09 W Distance (miles) 4.4 4.4 >5.0 0.5 0.42-j Terrain Height (feet) 200 200 100 100 4

X/Q (undepleted) 8.393 E-08 8.393 E-08 2.003 E-06 2.676 E-06 X/Q (depicted) 6.114 E-08 6.114 E-08 1.769 E-06 2.379 E-06 D/Q 1.104 E-10 1.104 E-10 3.357 E-09 4.488 E-09

) WNW Distance (miles) >5.0 4.6 3.9 1.2 0.42 Terrain lieight (feet) 227 227 80 80'

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X/Q (undepleted) 7.774 E-08 9.735 E-08 4.949 E-07 2.639 E i X/Q (depleted) 5.562 E-08 7.158 E-08 4.164 E-07 2.336 E-06 D/Q 9.074 E-11 1.171 E-10 7.182 E-10 3.946 E-09 4 >g

} So NW Distance (miles) >5.0 3.0 3.0 1.2 0.47 g g, I

Terrain Height (feet) 220 220 80 80 "gl 1 X/Q (undepleted) 1.697 E-07 1.697 E-07 5.903 E-07 2.586 E-06 $5 1.287 E-07 1.287 E-07 4.938 E-07 2.266 E-06 '

4 X/Q (depicted) ,.

D/Q 2.214 E 2.214 E-10 8.892 E-10 3.982 E-09 -G_

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TABLE Q II.3-2 (con't) ,

MAINE YANKEE: TURBINE BUILDING VENT X/Q, D/Q VALUES FOR SELECTED RECEPTORS (ANNUAL)

Radial Milk Meat Milk Nearest Residence Site Sector Cow Animal Goat and Vegetable Garden Boundary NNW Distance (miles) >5.0 1.1 >5.0 0.60 0.60 -

Terrain lleight (feet) 60 20 20 X/Q (undepicted) 5.126 E-07 1.324 E-06 1.324 E-06 X/Q (depicted) 4.362 E-07 1.161 E-06 1.161 E-06

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D/Q 8.728 E-10 2.299 E-09 2.299 E-09

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TABLE Q II.3-3 MAINE YANKEE: PRIMARY VENT STACK X/Q, D/Q VALUES FOR SELECTED RECEPTORS (GROWING SEASON)*

, Radial Milk Meat Milk Nearest Residence Sector Cow Animal Goat and Vegetable Garden N. Distance (miles) 1.7 1.3 >5.0 0.9 Terrain IIcight (feet) 80 80 80 X/Q (undepleted) 2.774 E-07 3.220 E-07 3.641 E -

, X/Q (depicted) 2.724 E-07 3.171 E-07 3.584 E-07 D/Q- 1.036 E-09 1.298 E-09 1.672 E-09 .

i NNE Distance (miles) 4.6 4.6 >5.0 1.3 Terrain lieight (feet) 200 200 120 X/Q (undepleted) 2.433 E-07 2.433 E-07 6.447 E-07 X/Q (depleted) 2.272 E-07 2.272 E-07 6.340 E-07 D/Q 7.102 E-10 7.102 E-10 2.820 E-09 NE Distance (miles) 4.2 4.2 4.9 0.7 Terrain lleight (feet) 220 220 220 40 X/Q (undepleted) 2.515 E-07 2.515 E-07 2.028 E-07 2.954 E-07 X/Q (depleted) 2.352 E-07 2.352 E-07 1.870 E-07 2.845 E-07 D/Q. 7.645 E-10 7.645 E-10 6.061 E-10 -1.807 E-09 i

, ENE Distance (miles) 2.4 2.4 >5.0 0.6 i Terrain lleight (feet) 223 223 20 d

X/Q (undepleted) 2.699 E-07 2.699 E-07 3.788 E-08

! X/Q (depleted) 2.641 E-07 2.641 E-07 3.582 E-08 l D/Q 6.064 E-10 6.064 E-10 1.880 E-10.

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E Distance (miles) 3.3 3.3 >5.0 0.5 >h C

2 Terrain lieight (feet) 220 220 66 IE.

j X/Q (undepleted) 2.029 E-07 2.029 E-07 5.314 E-08 "!

X/Q (depleted) 1.972 E-07 1.972 E-07 5.140 E-08 . Sf 5 D/Q 3.643 E-10 3.643 E-10 2.104 E-10 ,

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  • May through October y 4

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TABLE Q II.3-3 (con't)

MAINE YANKEE: PRIMARY VENT STACK X/Q, D/Q VALUES FOR SELECTED RECEPTORS (GROWING SEASON)*

l Radial Milk Meat Milk Nearest Residence' ,

Sector Cow Animal Goat and Vegetable Garden l

! ESE Distance (miles) >5.0 >5.0 >5.0 -0.8 l Terrain Height (feet) 80 l X/Q (undepleted) 7.138 E-08 X/Q (depicted) 6.893 E-08 l D/Q .2.804 E-10 _.

l SE Distance (miles) >5.0 >5.0 >5.0 0.4 -

Terrain IIcight (feet) 10 X/Q (undepicted) 1.582 E-07 X/Q (depicted) 1.476 E-07 D/Q 1.020 E-09 SSE Distance (miles) >5.0 0.5 5.0 0.5 Terrain lleight (feet) 10 160 10 X/Q (undepleted) 1.705 E-07 8.509 E-08 1.705 E-07 X/Q (depicted) 1.602 E-07 8.016 E-08 1.602 E-07 D/Q 1.126 E-09 2.583 E-10 1.126 E-09 S Distance (miles) >5.0 >5.0 >5.0 0.9 Terrain Height (feet) 40' ,

X/Q (undepleted) 1.305 E-07 X/Q (depleted) 1.251 E-07 D/Q 8.269 E-10 F N' SSw Distance (miles) >5.0 4.0 3.2 1.9 y@

Terrain lleight (feet) 100 100 40 gg--

X/Q (undepleted)' 6.544 E-08 7.943 E-08 .7.377 E-08 g3 X/Q (depleted) 6.294 E-08 7.686 E-08 7.165 E-08~  ;~ "

D/Q 2.122 E-10 2.757 E-10 3.554 E-10 --

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_ . _ _ _ _ _ _ _ _ _ _ _ _ _ . . _ _ _ _ _ _ _ _ _ . _ . _ _ _ . _ _ _ _ _ _ _ _ - _ _. __ _ _ _ __ 1 . _ a _

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TABLE Q II .3-3 (con't)

MAINE YANKEE: PRIMARY VENT STACK X/Q, D/Q VALUES FOR SELECTED RECEPTORS (GROWING SEASON)*

Radial Milk Meat Milk Nearest Residence Sector Cow Animal Goat and Vegetable Garden SW Distance (miles) 4.6 4.0 >5.0 2.3 Terrain lleight (feet) 161 140 100 X/Q (undepleted) 1.122 E-07 1.127 E-07 1.360 E-07 ~

X/Q (depleted) 1.071 E-07 1.084 E-07 1.327 E-07 D/Q 2.714 E-10 2.950 E-10 4.566 E-10 ,

WSW Distance (miles) >5.0 >5.0 >5.0 1.2 Terrain licight (feet) 80 X/Q (undepleted) _1.211 E-07 X/Q (depleted) 1.192 E-07 D/Q 4,031 E-10 W 4.4 >5.0 Distance (miles) 4.4 0.5 Terrain IIcight (feet) 200 200 100 X/Q (undepleted) 8.027 E-08 8.027 E-08 1.415 E-07 X/Q (depleted) 7.631 E-08 7.631 E-08 1.399 E-07 D/Q l.416 E-10 1.416 E-10 7.373 E-10 WNW Distance (miles) >5.0 4.6 3.9 1.2 Terrain IIcight (feet) 227 227 80 X/Q (undepicted) 1.116 E-07 1.403 E-07 1.240 E-07 X/Q (depleted) 1.060 E-07 1.347 E-07 1.232 E-07 D/Q 1.436 E-10 1.838 E-10 3.219 E-10 NW Distance (miles) >5.0 3.0 3.0 1.2 5*iolI Terrain Ileight (feet) 220 220 80 E 5-X/Q (undepleted) 2.356 E-07 2.356 E-07 1.482 E-07 fo X/Q (depleted) 2.294 E-07 2.294 E-07 1.470 E-07 .~ "

D/Q 3.746 E-10 3.746 E-10 4.404 E-10 _~

e

  • May through October 5

+

c O O D -

l TABLE Q II.3-3-(con't)'

i ..

j MAINE YANKEE: PRIMARY VENT STACK l- X/Q, D/Q VALUES FOR SELECTED RECEPTORS (GROWING SEASON)*

+

t

, Radial Milk Meat Milk. Nearest Residence-j Sector Cow Animal Goat and Vegetable Garden

$ NNW Distance (miles) >5. 0 1.1 >5. 0 - 'O. 6

Terrain IIeight (feet) 60 20 '
X/Q (undepicted) 1.100 E-07 4.717 E-08 *'

X/Q (depleted) 1.089 E-07 . 4.566 E-08 ,

D/Q 3.589 E-10 2.215 E-10. .

i

)

i s

i i

i ~

i k

l k

i !r ilT l .E,E i %i

} 2: $ .-

8-l

  • May through October i

t

(N J (q) L) ~

TABLE Q II.3-4 i

l MAINE YANKEE: TURBINE BUILDING VENT X/Q, D/Q VALUES FOR SELECTED RECEPTORS (GROWING SEASON)*

Radial Milk Meat Milk Nearest Residence j Sector Cow Animal Goat and Vegetable Garden N Distance (miles) 1.7 1.3 >5.0 0.9 Terrain lleight (feet) 80 80 80 ~

X/Q (undepleted) 8.030 E-07 1.168 E-06 2.002 E-06 '

X/Q (depleted) 6.703 E-07 9.954 E-07 1.745 E-06 D/Q 1.825 E-09 2.730 E-09 4.810 E-09 -

NNE Distance (miles) 4.6 4.6 >5.0 1.3 Terrain licight (feet) 200 200 120 X/Q (undepleted) 2.444 E-07 2.444 E-07 1.424 E-06 X/Q (depleted) 1.802 E-07 1.802 E-07 1.209 E-06 D/Q 5.865 E-10 5.865 E-10 4.052 E-09 NE Distance (miles) 4.2 4.2 4.9 0.7 Terrain Height (feet) 220 220 220 40 X/Q (undepleted) 2.357 E-07 2.357 E-07 1.913 E-07 3.082 E-06 X/Q (depleted) 1.753 E-07 1.753 E-07 1.388 E-07 2.702 E-06 D/Q 6.070 E-10 6.070 E-10 4.806 E-10 9.639 E-09 ENE Distance (miles) 2.4 2.4 >5.0 0.6 Terrain licight (feet) 223 223 20 X/Q (undepleted) 2.325 E-07 2.325 E-07 1.706 E-06 X/Q (depleted) 1.784 E-07 1.784 E-07 1.462 E-06 D/Q 4.217 E-10 4.217 E-10 3.502 E-09 Distance (miles) 3.3 E 3.3 >5.0 0.5 gg Terrain Ileight (feet) 220 220 66 3 @-

X/Q (undepleted) 1.831 E-07 1.831 E-07 2.800 E-06 u@

X/Q (depleted) 1.308 E-07 1.308 E-07 2.388 E-06 .

D/Q 2.455 E-10 2.455 E-10 4.525 E-09 -

~

  • May through October *

. . .._ . _ _ . . _ . . m ,

'O O 0 -

TABLE Q II.3-4 (con't)

  • MAINE YANKEE: TURBINE BUILDING VENT X/Q, D/Q VALUES FOR SELECTED RECEPTORS (GROWING SEASON)*

Radial Milk Meat Milk Nearest Residence Sector Cow Animal Goat and Vegetable Garden ESE Distance (miles) >5.0 >5.0 >5.0 0.8 Terrain Height (feet) 80 '

X/Q (undepleted) 9.297 E-07

  • l X/Q (depleted) _7.849 E-07 D/Q 1.993 E-09_ ,

i SE Distance (miles) >5.0 >5.0 >5.0 0.4-Terrain IIcight (feet) '10 X/Q (undepleted) 3.710 E-06 X/Q (depleted) 3.249 E-06 D/Q 1.013 E-08 SSE Distance (miles) >5.0 0.5 5.0 0.5 Terrain lieight (feet) 10 160 10 -;

X/Q (undepicted) 2.814 E-06 1.003 E-07' 2.814 E-09  !'

X/Q (depleted) 2.459 E-06 6.976 E-08 .2.459 E-06 D/Q 8.114 E-09 2.209 E 8.114 E-09 S Distance (miles) >5.0 >5.0 >5.0 0.9 Terrain lleight (feet) 40 X/Q (undepleted) 1.118 E-06 -

X/Q (depleted) 9.'304 E-07' D/Q 2.952 E-09~

>g SSW Distance (miles) >5.0 4.0 3.2 1.9. 55 5 Terrain lleight (feet) 100 100 40- E E.

X/Q (undepleted) 1.386 E-07' 1.884 E-07 3.824 E-07 #5 X/Q (depleted) 9.870 E-08 1.392 E-07 3.029 E-07 d5-D/Q 2.685 E-10 3.810 E-10 8.471 E-10 {e --

  • May through October 's

O O O -

TABLE Q II.3-4 (con't) l ..

MAINE YANKEE: TURBINE BUILDING VENT X/Q, D/Q VALUES FOR SELECTED RECEPTORS (GROWING SEASON)r .i l

l Radial Milk Meat Milk Nearest Residence Sector Cow Animal Goat and Vegetable Garden SW Distance (miles) 4.6 4.0 >5.0 2.3 Terrain lleight (feet) 161 140 100 X/Q (undepleted) 1.395 E-07 1.687 E-07 3.645 E-97 '

X/Q (depleted) 9.850 E-08 1.220 E-07 2.875 E-07 D/Q 2.390 E-10 2.962 E-10 7.045 E-10 ,

t WSW Distance (miles) >5.0 >5.0 >5.0 1.2 Terrain lieight (feet) 80 i

! X/Q (undepleted) 6.-465 E-07 X/Q (depleted) _5. 391__ E-07 D/Q 1.239 E-09 W Distance (miles) 4.4~ 4.4 >5.0 0.5 Terrain Height (feet) 200 200 100 X/Q (undepicted) 8.359 E-08 8.359 E-08 2.044 E-06 X/Q (depleted) 6.238 E-08 6.238 E-08 1.825 E-06 D/Q 1.199 E-10 1.199 E-10 3.687 E-09  !

WNW Distance (miles) >5.0 4.6 3. 9 1.2 Terrain lleight (feet) 227 227 80 X/Q (undepleted) 1.091 E-07 1.367 E-07 7.076 E-07 X/Q (depleted) 7.934 E-08 1.020 E-07 6.007 E-07 D/Q 1.154 E-10 1.487 E-10 9.154 E-10

?

i NW Distance (miles) >5.0 3.0 3.0 1.2 ?f g3 j Terrain lleight (feet) 220 220 80 m., g-

! X/Q (undepleted) 2.328 E-07 2.328 E-07 8.170 E-07 gg l X/Q (depleted) 1.780 E-07 1.780 E-07 6.875 E-07 ,~ "

D/Q 3.037 E-10 .3.037 E-10 1.223 E-09 _ _~

'S

  • May through. October
  • _ _ _ _ - _ _ _ - _ _ _ _ _ _ _ _ _ . _ _ _ _ _ _ . - _ _ _ _ _ _ _ - _ . . _ .-_-_________._.___--_____m...i._m_ - _ - _ - _ - _ _ _ _ _ _ . _ . _ _ _ . - _ _ _ . _ _ _ _ . - _ _ _ - _ . _ _ _ _ _ _ _ . _ _ _ _ _ _ _ _ _ _ _ _ _

c, - -___ _ .

.- .. .- - . = , -

O O O =;

TABLE Q II.3-4 (con't). i MAINE YANKEE: TURBINE BUILDING VENT X/Q, D/Q VALUES FOR SELECTED RECEPTORS (GROWING SEASON)* 'i 3

Radial Milk Meat Milk' Nearest Residence Sector Cow Animal Goat 'and Vegetable Garden NNw Distance (miles) >5.0 1.1 >5.0 0.6 20 Terrain lleight (feet) 60 X/Q (undepleted) 7.546 E-07 1.940 E-06

~

X/Q (dep1eted) 6.474 E-07 'l.7.13 E-06 .;-

D/Q 1,241 E-09 3.267 E-09 ..

i i

i NW -
  • 2 8 '

EE .

pw .

i U

n j Ma'y through October

_-. ,e%=. ._s- ___e--i-----+ee _ e-, e-r-- -- rs.- ---wa, w:---.m =tawew ---mm w- m ---a r v we ~-%- - - m - - _ _

Amendment 1 August 31, 1976 i

SECTION IV l

t 4

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?

t Radiological DOSC [

{

Assessment I

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, - . , , , . . . - , , ,,- - .. , _ . , ,_ . . - - . ,_ _ . - , , . - . . , - . . nn.,,__,--,_ . _ , _ _ _-

. Amendment 1

. August 31, 1976

(~} SECTION IV V

RADIOLOGICAL DOSE ASSESSMENT Paragraph (c) of 10 CFR Part 20.1, states that a licensee to operate a light-water reactor, should in addition to complying with the limits set forth in that Part of the regulation on the amount of radioactivity that can be discharged in effluents to unrestricted areas, make every reasonable effort to maintain releases of radioactive materials to un-restricted areas as far below the limits specified as is reasonably achievable. Appendix I to 10 CFR Part .'i0 provides guidance on the levels of exposure of the general publi: resulting from effluents releases that may be considered to be as low as is reasonably achievabic.

This section indicates the calculational dose models and assumptions which

() were used in determining Maine Yankee's compliance with the Appendix I dose guideline criteria on "as low as reasonably achievabic." The resultant individual radiation doses are based where possible on realistic  ;

assessments of radioactive source terms, hydrologic and meteorologic dis-persion parameters, and physically applicable dose pathways in the site environment. Where site specific data is uncertain, conservative assumptions were made. The calculated doses due to normal plant operation, including anticipated operational occurrences, are presented in this section and summarized in Tables Q IV.1-1 through Q IV.1-3.

Radiation Doses From Liquid Effluent Pathways Maine Yankee is a single reator unit located on a peninsula known as 7-] Bailey Point which extends into the northern reaches of the Montsweag N/

IV-1

i o .

, ' Amendment 1

. August 31, 1976

\ .

Bay Estuary in the southern central coast of Maine. The site is approximately thirteen miles. inland from the open ocean, Liquid wastes are discharged from the plant via a submerged multi-port diffuser which extends approximately 1,000 feet into the tidal estuary and has a design circulating water flow of 420,000 gpm. -The diffuser was installed into the plant during the summer of 1975 to replace the original surface discharge arrangement which discharged into Bailey Cove. Table Q B.4-3 of Appendix B of this report lists the isotopic breakdown of the liquid source term,as generated by the GALE computer code, which might be expected to be discharged annually to the plant's circulating water system. Appendix B describes the plant's effluents control syste:ms and operating parameters which were used to analyze this potential liquid source term. The description of the GALE _ computer code and its assusptions can be found in the Nuclear Regulatory Commission report kJREG-0017(U.

Since the plant is located on a tidal estuary, the receiving water is not suitable for either drinking or irrigation. The liquid pathways which have been evaluated are those which no,< exist or could possibly exist at some time during the plant life, and which could contribute a significant fraction of the total dose from water related exposures.

The liquid pathways deternined to be significant include the ingestion of fish and shellfish, and direct exposure due to sedimentation of radioactivity along the shore where individuals engaged in shoreline activities can be exposed.

The calculational methods used in assessing the radiation dose to individuals have been taken from Regulatory Guide 1.109( for liquid

.- IV-2

~

Amendment 1

. August 31, 1976 exposures through aquatic foods and shoreline deposit pathways. For i  ;

aquatic foods, the dilution for the mixing effect of the diffuser has been determined to be a factor of ten. This is the dilution at the edge of the initial mixing zone where the effluent has undergone prompt dilution only. This dilution factor of 10 includes the effect of recirculation of activity due to the tidal cycle in the estuary. For shoreline deposits, the nearest point where tidal flats could be occupied on a recurring nature is in Bailey Cove which borders the site on the south and west. The estimated average dilution for Bailey Cove with respect to the discharge is approximately 25 to 1. Both these estimates of dilution due to the diffuser operation are based on thermal predictions made by MIT utilizing a physical model of the Montsweag j 1

estuary system and include near-field recirculation of heat. Far-field I l

D heat return was also factored into the dilution estimates based on field I dye studies (4) without utilizing surface heat loss. l 4

The human consumption or usage factors which were used in the dose cal-culations for ingestion of fish and shellfish were taken from Regulatory )

Guide 1.109. For fish ingestion, the consumption rates are 21 Kg per year, 16 Kg per year, and 6.9 Kg per year for adults, teenagers, and children, respectively. The ingestion rates for shellfish were taken to be 5 Kg per year, 3.8 Kg per year, and 1.7 Kg per year for the same respectively age groups. For internal doses due to ingestion of seafood, an a' verage transit time of 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> has been used to allow for radio-nuclide decay during movement through the food chain, as well as during food preparation. It has also been assumed that the fish and shellfish

{; which are eaten had reached equilibrium with the water concentration of radioactivity at the edge of the mixing zone. This assumption 1 cads to conservatism in the calculation since fish tend to be very mobile and IV-3

{

  • Amendmant 1 August 31,-1976 are not expected to remain for long periods near the discharge, and

.since no significant she11 fishing has been reported in- the area of .

the plant discharge.

Shoreline activities which have been identified in the. vicinity of ,

the site include a commercial worm digging industry along the tidal flats of Montsweag Bay. In the area of the plant (Baily Cove), it has been estimated that a commerical worm digger could spend as much as 325 hours0.00376 days <br />0.0903 hours <br />5.373677e-4 weeks <br />1.236625e-4 months <br /> per year on the mud flats. n is occupancy time was applied '

for both adult and teenagers in order to determine the potential whole body external dose these individuals might receive during this activity.

In addition, a fifteen year time period was assumed for the sediment to be exposed to activity in the water. This time period represents the approximate mid-point of plant operating lifetime, and thus allows for the buildup of radioactivity such that a plant lifetime average sediment concentration can be estimated. No credit was taken for decay ,

in transit of activity between the discharge point and the sediment in Bailey Cove.

1 The maximum external dose due to shoreline activities is calculated to '

e be 2.5 x 10-3 mrem per year to the whole body and 2.9 x 10-3 mrem per year to the skin.

The dose to internal organs of the various groups from the ingestion of fish and shellfish are presented in Table Q IV.1-1.

ne critical organ is calculated to be the GI tract of an adult with an annual dose from ingestion of seafood of 2.3 x 10 mrem. The yearly whole body dose for the critical age group due to internal exposure from O i#sested seafeed is 7.e x 10-3 mrem fer ae eauit. Therefere. the IV-4

L e a .

, Amendmsnt 1 August 31, 1976

~

maximum total annual whole body dose from.both external and internal exposure from radioactivity released in the liquid discharge from Maine Yankee is.approximately 1.0 x 10-2 mrem. This value is about 0.5 percent of the Appendix I design objective of 3 mrem per year per unit for whole body doses in liquids. The maximum organ dose due to plant liquid effluents, which includes both an internal component due to t

l ingestion of food, and an external component due to direct exposure to activity built up in sediment, represents approximately 2.4 percent of the Appendix I design criteria dose of 10 mrem per year per unit  :

to any organ. The critical organ (GI tract of an adult) is calculated I'

to receive 2.4 x 10-1 mrem per year. Table Q IV.1-1 lists all liquid pathway doses due to plant discharges, i

I O  ;

Radiation Doses From Gaseous Effluent Pathwaft l l Gaseous effluent source terms have been calculated using the NRC GALE

{

computer code for pressurized water reactors. Table Q B.6-2 of Appendix j l B lists the quantities of noble gases, iodines, and particulates which might be generated as annual gaseous releases based on the system description and operating parameters presented in Appendix B. These source terms are based on a failed fuel fraction of 0.12 percent, and the primary coolant isotopic distribution as reported by the ANS 18.1 Source Term Specification Working Subcommittee. In addition to those nuclides listed in Table Q B.6-2, 8 curies per year of Carbon-14 and 25 curies per year of Argon-41 have been added to the gaseous effluents for radiation dose assessments based on the information in the Nuclear O aeselaterx Commissien s NuaEc-0017.

l .

1 IV-5

e e Amendment 1 August 31, 1976

^3 The main release point for gases discharged from the plant is via the V

175 foot tall primary vent stack, which is located adjacent to the reactor containment building. In addition to the primary vent, the turbine hall exhausts ventilation air directly to vents located on the turbine hall roof. The turbine hall exhaust is assumed to be a ground level source. The primary vent stack is treated as a mixed mode elevated release point depen-dent upon windspeed as described in Regulatory Guide 1.111(5), 1 Meteorological dispersion of effluents was estimated by a straight-line airflow model applied to a sea coast site. X/Q and D/Q values were deter-mined in each sector for the nearest site boundary, nearest resident and vegetable garden, and nearest cow, goat, and meat animal out to a distance i

of 5 miles from the reactor. Each resident is considered to have a vegetable garden large enough to produce enough food to meet a significant fraction of V

the assumed usage factors for the age groups given in Regulatory Guide 1.109, l Table A-2. This includes the annual intake of fruits and vegetables of 520 Kg per year, 630 Kg per year, and 520 Kg per year for children, teenagers, and adults, respectively, and of Icafy vegetables of 26 Kg per year, 42 kg per year, and 64 Kg per year for the same respective age groups. For leafy vegetables, a factor of 0.5 is applied to the annual consumption which assumes that the garden of interest is able to produce during the six month growing seasons only half of the annual total consumed. For fruits and vegetables, a factor of 0.76 is assumed. X/Q and D/Q values were calculated from onsite meteorological data for both an annual period and six-month growing season.

Tables Q II.3-1 through Q II.3-4 of Section II list the X/Q and D/Q values which have been calculated for each receptor point.

A 1

V Gamma and Beta Doses Both gamma and beta air doses were calculated for the receptor point of IV-6

(.

  • e .

Amendment 1-4 August 31, 1976' highest offsite exposure using the methodology and dose conversion factors of Regulatory Guide 1.109. No credit was assumed for decay of gaseous activity in transit to point of exposure. Terrain elevations of the surrounding area where factored into calculation of X/Q values at each receptor location. The point of highest offsite exposure was determined to be at the southern site boundary which is adjacent to the river shoreline and thus-is not expected to ever be continuously occupied during the plant life. However, the gamma and beta air dose calculated at this location are 0.095 mrad per year and 0.47 mrad per year, respectively, and are thus below the Appendix I guideline gamma and beta air dose values of 10 mrad and 20 mrad per year, respectively. Therefore, it can be ' assumed that any point beyond the site boundary which could at some time in the future be occupied, will O also be below these guideline values.

In addition to the air doses, the whole body and skin doses to the most restrictive existing offsite individual, as well as the worst site boundary location which could be occupied in the future were calculated.

These doses assumed an occupancy factor of 100 percent and an attenuation factor of 0.7 to account for the dose reduction due to shielding provided by residential structures. 'Ihe dose analyses indicates that the maximum whole bcdy dose to the worst real resident is 0.0095 mrem per year for the resident's i located 0.5 miles SSE. The skin dose at this point is calculated to be 0.029 mrem per year. These doses are also below the guideline values of the "as low as reasonably achievable" criteria of Appendix I which are set at 5 mrem per year per unit for whole body dose, and 15 arem per year unit for skin dose. Table Q IV.1-2 indicates the annual gamma and beta doses calculated I

at the points of interest. 1 IV-7 u______

7 e r Amendm:nt 1 t '

August 31, 1976 n

'()

Doses From Radioiodine and Particulates Radiation doses from both radiciodine and particulates calculated to be part of the annual gaseous effluents from the plant were determined for the following pathways: 1) external irradiation from activity deposited onto the gound surface, 2) inhalation, and 3) ingestion of vegetable, meat, and milk. The dose models and standard input parameters for crop yield, exposure and holdup times that were utilized in the dose assessment are those found in Regulatory Guide 1.109. Doses were calculated for receptor pathways which were determined by field surveys to actually exist. The resultant organ doses were determined after adding the contribution from all pathways at each location. Table Q I.2-1 of Section I indicates the location of the nearest resident, cow, goat, and meat animal in each of the sixteen compass sectors from the plant.

Dose pathways which involve grazing of milk or meat animals, or the growing season for vegetables, were analyzed using the six-month meteorological data taken during the growing season. Ground surface exposure, as well as inhalation doses were analyzed using annual meteological data. Milk and meat animals were assumed to receive their entire daily dietary intake from open pasture grass during the six-month grazing season. This is a conservative assumption since most dairy operations use supplemental feeding of animal when on pasture or actually restrict animals to full-time silage feeding throughout the year. All calculated doses considered both the contribution from the turbine building releases as well as the primary vent stack. The turbine building was treated as a ground-1cvel source while the primary vent p

(_) stack was analyzed as a mixed mode release point dependent upon windspeed i

IV-8

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Amendment 1 s

  • August 31, 1976

,r

(),

conditions. The highest offsite dcse was determined to be for a child living 1.3 miles north-northeast of the plant. The critical organ dose (1.6 x 10-1 mrem per year) was to the thyroid and was due to exposure through the inhalation and vegetable consumption pathways.

The maximum dose involving the air-grass-milk pathway is for an infant drinking cow's milk at a farm located 1.7 miles north of the plant.

It is assumed that an infant does not consure any home-grown vegetables.

Therefore, the calculated dose to the thyroid of 1.2 x 10-I mrem per year considers only the inhalation and milk consumption contributions.

For both these locations, the primary dose contributing isotopes e

were tritium, carbon-14, and iodine-131, based on the predicted annual quantities of these nuclides which were indicated to be released by the NRC source term program (GALE).

G(~h The maximum organ dose represents 1.1 percent of the 15 mrom per year dose criteria of Appendix I for release of iodine and particulates, including carbon-14 and tritium. Table Q IV.1-3 indicates the total organ doses from all gaseous pathways for locations of maximum dose.

Conclusion The radiological assessment of the prinicpal exposure pathways in the Maine Yankee environment indicate that the dose criteria of Appendix 1 to 10 CFR Part 50 is not likely to be exceeded during normal operation of the plant. Maine Yankeeas analyzed, does meet the "as low as reasonably achievable" criteria for the radioactive effluents and is in compliance with Federal Radiation Regulations.

f]'a IV-9

e Amendrent I g , August 31, 1976 4

REFERENCES J

SECTION IV t

1. "Calculation of Releases of Radioactive Materials in Gaseous ~ and Liquid

-Effluents from Pressurized Water Reactors (PWR-GALE Code)", NilREG-0017, - '

U.S. Nuclear Regulatory Commission.

2. "Calculation of Annual Doses to Man from Routine Releases of Reactor Effluents for the Purpose of Evaluating Compliance.with' 10 CFR Part 50, I Appendix I", Regulatory Guide 1.109, U.S. Nuclear Regulatory Commission. '

March, 1976.

3. "Experimental Study of a Submerged hbitiport Diffuser in a Tidal Bay",  !

MIT Technical Report 184, April 1974. '

4. "Far Field Analysis", Diffuser Discharge, Maine Yankee Atomic Power Station, Maine Yankee Atomic Power Company, Stone 6 Webster Engineering Corp. , hby 1974.
5. "Methods for Estimating Atmospheric Transport and Dispersion of Gaseous l Effluents in Routino Releases from Light-Water-Cooled-Reactors", I Regulatory Guide 1.111, U.S. Nuclear Regulatory Commission, March 1976. I 4

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! IV-10 l

O O O -

TABLE Q IV.1-1 MAINE YANKEE LIQUID PATilWAY DOSE SUl@(ARY (MREM PER YEAR)

Age Grog External Dose Due 4 Total Internal Organ Dose

  • To Shoreline Exposure -

w.

Whole Body Skin Bone Liver Kidney Lung GI-LLI Thyroid Whole Body 'f ADULT 2.5 x 10-3 2.9 x 10-3 7.5 x 10-2 1.4 x 10-2 5.8 x10 5.6x10- 2.4 x 10-I 1.9 x 10'I 1.0 x 10-2 TEEN 2.5 x 10-3 2.9 x 10-3 1.5 x 10 1.3 x10-2 4.5x10 4.9x16 1.9 x 10-I 1.7 x 10-I 9.3 x 10-3 l OilLD 1.1 x 10-4 1.3 x 10-4 1.5 x 10-2, 8.6 x10~

l 1.9 x16 1.3x10-3 8.2 x 16 1.8 x 10-I 6.8 x 10-3 l

r I

  • Internal organ dose due to ingestion of seafood plus external whole body dose contribution to each organ due to shoreline exposure.

?$

i -? a T. W

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3-l

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O Q,) O a TABLE Q IV.1-2 St\INE YANKEE

~

GASEOUS PATIIWAY DOSE StBotARY FOR NOBLE CAS EFFLUENTS GAFBIA AIR DOSE BETA AIR DOSE W110LE BODY DOSE SKIN DOSE LOCATION (MRAD /YR) (MRAD /YR) (MREM /YR) (MREM /YR) ',

I Maximum site boundary -l

-2 -2 -1 (river bank) 0.08 miles 9.5 x 10 4.7 x 10 S.6 x 10 2.9 x 10 south Maximum site boundary -2 -2 (non-river) 1.3 miles -2 1.4 x 10 5.4 x 10 8.5 x 10-3 3.7 x 10 NNE*

Maximum existing -2 -2 residence, 0.5 miles 1.6 x 10

-2 3.5 x 10

-3 9.5 x 10 2.9 x 10 SSE NN EO

  • The 1.3 mile distance is the closest point on the NNE site boundary where access is not restricted $I by the river bank. The annual average undepleted X/Q value is 4.39 x 10-7 sec/m 3 . This location gk is not presently occupied. _

U 3

e . _ _ _ _ - _ .. . . __ - .- ._

I

(]

yj (')

Ry a

TABLE Q IV.1-3 i MAINE YANKEE GASEOUS PATlfWAY DOSE StBNARY FOR RADIOIODINE AND PARTICULATES*

T(TRAL ORGAN DOSE (MREM PER YEAR)

Location Age Group Bone Liver Kidney Lung GI-LLI Thyroid Whole Body Skin Maximum Nearest Resident 1.4 x 10-1 6.8 x 10-2 #

Adult 6.7 x 10-2 6.7 x 10-2 6.7 x 10-2 7.5 x 10-2 6.8 x 10-2 2.2 x 10-3, 1.3 Miles NNE (1)

Teen 4.7 x 10-2 7.8 x 10-2 7.4 x 10-2 7.7 x 10-2 7.7 x 10-2 8.3 x 10-2 7,7 x 10-2 2.2 x 10-3 Child 1.1 x 10-I 1.5 x 10-1 5.7 x 10-2 1.5 x 10-1 1.5 x 10-1 1.6 x 10-1 1.5 x 10-1 2.2 x 10-3 Infant 2.7 x 10-3 7.3 x 10-3 4.0 x 10-3 7.3 x 10-3 7.2 x 10-3 1.0 x 10-2 7.2 x 10-? 2.2 x 10-3 t-Maximum Dairy Farm 1.7 Miles North (2), Adult 8.7 x 10-2 3.9 x 10- 3.8 x 10-2 3.8 x 10-2 3.8 x 10-2 5.0 x 10-2 3.8 x 19-2 7.2 x 10-4 Teen 2.9 x 10-2 4.5 x 10-2 4.4 x 10-2 4.6 x 10-2 4.6 x 10-2 6.1 x 10-2 4.6 x 10-2 7.2 x 10-4 Child 6.9 x 10-2 9.5 x 10-2 3.5 x 10-2 9.4 x 10-2 9,4 x 10-2 1.2 x 10-I 9.4 x 10-2 7.2 x 10-4 <

In fant 4.9 x 10-2 6.2 x 10-2 1.2 x 10-2 6.1 x 10-2 6.0 x 10-2 1.2 x 10-I 6.1 x 10-2 7.2 x 10-4

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Maximus Site Boumlary (Non- Adult 3.6 x 10-3 9.4 x 10-3 9.3 x 10-3 9.4 x 10-3 9.3 x 10-3 1.1 x 10-2 ,

9,3 x 10-3 2.1 x 10-3 Rinr) 1.3 Miles NNE (3) Teen 2.1 x 10-3 6.1 x 173 7.1 x 10-3 6.2 x 10-3 6.1 x 10-3 7.3 x 10-3 6.1 x 10-3 2.1 x 10-3 Child 1.9 x 10-3 3.0 x 10-3 2.5 x 10-3 3.0 x 10-3 3.0 x 10-3 3.4 x 10-3 3.0 x 10-3 2.1 x 10-3 Infant 2.6 x 10-3 6.9 x 10-3 3.7 x 10-3 6.9 x 10-3 6.8 x 10'3 9.0 x 10-3 6.8 x 10-3 2.1 x 10-3 (1) Dose assessment includes contribution from the following pathways; ground plain exposure, inhalation and ingestion of home grown vegetables.

(2) Dose assessment includes contributions from the following pathways; ground plain exposure, inhalation, and ingestion of milk and home grown vegetables (3) Dose assessment includes contribution from the following pathways; ground plain exposure and inhalation. No vegetable pathway is assumed since location is not presently occupied by a residence.

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