ML20002A368

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Forwards Amend 1 to 760602 Submittal of Info for Use in App I Evaluation.Contains Radiological Dose Assessment for Facility Demonstration of Compliance W/App I & Updated Meteorological Dispersion Parameters
ML20002A368
Person / Time
Site: Yankee Rowe
Issue date: 08/31/1976
From: French J
YANKEE ATOMIC ELECTRIC CO.
To: Purple R
Office of Nuclear Reactor Regulation
References
WYR-76-87, NUDOCS 8011140326
Download: ML20002A368 (37)
v • d • e


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YANKEE ATOMIC ELECTRIC COMPA8 l cc;

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g W0 20 Turnptke Road Westborovg @.1 A s 01581 s:a

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August 31, 1976 United States Nuclear Regulatory Commission

.s Washington, D. C.

20555 Attention: Office of Nuclear Reactor Regu?.ation Mr. Robert Purple

, e '_ '.

References (1)

License Uc. DPR-3 (Docket No. 50-29)

(2)

NRC letter dated February 19, 1976 2-(3) Yankee letter to NRC dated June 2, 1976, WYR 76-63 (4)

NRC letter dated July 2, 1976

Dear Sir:

In ycur letter to Yankee Atomic Electric Company (Reference 2),

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

Yankee submitted on June 2, 1976 (Reference 3) that portion of the inforration 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 Yankee Atomic and submitted to the Commission.

The enclosure to this letter contains Amendment 1 to Yankee's original submittal of information for use in the Appendix I evaluation (Reference 3).

Amendment 1 contains both the radiological dose assess-ment for Yankee's demonstratien 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 be inserted into Yankee's June 2, 1976 submittal (Appendix I Report) in accordance with the attached instruction sheet.

The additional information you requested in your letter of

/

July 2,1976 (Reference 4) is being prepared, and will be submitted as an amendment to the Appendix I Report by October 11, 1976.

Included f

/

in this submittal will be a detailed description of the meteorological modeling which has been used.

a057 801114'O N 6

UnitOd States Nuc1 car Regulatory Commission August 31, 1976 Attn Offica of Nuclear Reactor Regulation Pega Two Any questions regarding this submittal should be directed to Mr. Peter I.ittlefield, at our Engineering Office in Westborough, Massachusetts.

Very truly yours, YANKEE ATOMIC ELECTRIC COMPANY f\\

/Wh J. L. French Manager of Operations Enclosure

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Amendmen? I

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August 31, 1976 Section II Meteorology Data collected from the Yankee Rowe on-site meteorological system was analyzed for the period October 1,1971 through September 1,1972. The annual and monthly joint frequency distributulons of wind speed and direction by atmospheric stability class in Table QII.6-1 provide a detailed description of the meteorological data.

A 96.3 percent data recoverability was achieved for the period of record.

The Straight-Line Airflow Model, with appropriate source configuration considerations 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 Zind

'x were used to determine the X/Q and D/Q values for specific receptors as provided in Table QII.3-1 through QII.3-4.

Site specific recirculation correction factors, for a river valley

' 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 calculatica of X/Q and D/Q values.

A.

Prirary vent stack release:

1.

Mixed release mode 2.

Physical height of the release point above ground:

46 meters 3.

Inside diameter of stack:

1.07 meters 4

Vertical exit velocity of plume:

10.8 meters /second 5.

Maxicun adjacent building height: 46 meters i

6.

Depth of mixing layer:

1,000 meters 7

Average ambient air temperature:

281*K

/

S.

Recirculation correction factors:

1.0 II-1

TABLE

.I.3-1.

YANKEE RONE:

PRIMARY VENT STACK X/Q, D/Q VALUES FOR SELECTED RECEPTORS (ANNilAL)

Radial Milk Meat Milk Nearest Residence Site Sector Cow Animal Goat and Vegetable Garden Boundary N

Distance (miles) 3.8 3.8

>5.0 2.9 0.59 Terrain licight (feet) 899 899 899 138 X/Q (undepleted) 2.807 E-07 2.807 E-07 4.175 E-07 2.061 E-06 X/Q (depleted) 2.075 E-07 2.075 E-07 3.174 E-07 2.050 E-06 D/Q 3.734 E-10 3.734 E-10 5.727 E-10 5.670 E-09 NNE Distance (miles) 4.9 3.3

> 5. 0 2.8 0.59 Terrain licight (feet) 1056 961 919 538 X/Q (undepleted) 1.581 E-07 2.832 E-07 3.752 E-07 4.650 E-06 X/Q (depleted) 1.174 E-07 2.193 E-07 2.955 E-07 4.068 E-06 D/Q l.898 E-10 3.563 E-10 4.808 E-10 6.735 E-09 NE Distance (miles)

> 5. 0 2.3

>5.0 2.3 0.85 Terrain licight (feet) 958 958 837 X/Q (undepicted) 4.084 E-07 4.084 E-07 1.920 E-06 X/Q (depleted) 3.200 E-07 3.200 E-07 1.611 E-06 D/Q 4.838 E-10 4.838 E-10 2.435 E-09 NE Distance (miles)

  • 1.4 Terrain lleight (feet) 919 X/Q (undepleted) 8.237 E-07 X/Q (depleted) 6.699 E-07 D/Q l.016 E-09 EV 98 ENE Distance (miles) 5.0 5.0

>5.0 3.7 1.1 Terrain licight (feet) 1191 1191 1191 899 v, @

X/Q (undepleted) 7.898 E-08 7.898 E-08 1.250 E-07 R.487 E-07

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X/Q (depleted) 5.631 E-08 5.631 E-08 9.265 E-08 7.018 E-07 D/Q 8.742 E-11 8.742 E-11 1.444 E-10 1.100 E-09

  • Summer Camp

(

TABLE Q 11.a-1 (con't) 4 YANKEE ROWE:

l'RDIARY VENT STACK X/Q, D/Q VAltlES FOR SELECTED RECEPTORS (ANNUAL)

Radial Milk Meat Milk Nearest Residence Site Sector Cow Animal Goat and Vegetable Garden Boundary ENE Distance (miles)

  • 1.8 Terrain licight (feet) 1056 j

X/Q (undepleted) 3.714 E-07 X/Q (depleted) 2.956 E-07 D/Q 4.641 E-10 E

Distance (miles) 3.6 3.6

>5 0 1.8 1.1 Terrain lleight (feet) 997 997 978 938 X/Q (undepleted) 1.832 E-07 1.832 E-07 5.216 E-07 1.208 E-06 X/Q (depleted) 1.332 E-07 1.332 E-07 4.080 E-07 9.841 E-07 D/Q l.655 E-10 1.655 E-10 5.115 E-10 1.232 E-09 ESE Distance (miles) 4.5 2.1

>5.0 2.1 1.3 Terrain lleight (feet) 919 919 919 918 X/Q (undepleted) 1.079 E-07 3.454 E-07 3.454 E-07 7.458 E-07 X/Q (depleted) 7.909 E-08 2.741 E-07 2.741 E-07 6.134 E-07 D/Q l.190 E-10 4.188 E-10 4.188 E-10 9.389 E-10 SE Distance (miles)

>5.0 1.9

>5.0 1.3 0.70 Terrain lleight (feet) 1017 1017 1017 X/Q (undepleted) 6.364 E-07 1.098 E-06 3.237 E-06 X/Q (depleted) 5.042 E-07 8.930 E-07 2.732 E-06 D/Q 8.316 E-10 1.477 E-09 4.490 E-09

?8 SSE Distance (miles)

5. 0 2.9

>5.0 1.2 0.59 g g.

Terrain licight (fect) 958 958 958 838

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X/Q (undepleted) 2.284 E-07 5.191 E-07 2.005 E-06 6.927 E-06 X/Q (depleted) 1.556 E-07 3.868 E-07 1.617 E-06 5.841 E-06

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D/Q-2.269 E-10 5.592 E-10 2.353 E-09 8.391 E-09

  • Summer Camp em.

O em e e.,

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

YANKEE ROWE:

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 S

Distance (miles)

> 3, 0 1.8

>5.0 1.4 0.59 Terrain licight (fect) 938 938 778 X/Q (undepicted) 1.661 E-06 2.379 E-06 1.078 E-05 X/Q (depleted) 1.269 E-06 1.857 E-06 8.957 E-06 D/Q l.380 E-09 2.020 E-09 9.645 E-09 SSW Distance (miles)

>5.0

>5.0

>5.0 3.8 0.94 Terrain licight (feet) 919 899 X/Q (undepleted) 5.488 E-07 4.866 E-06 X/Q (depleted) 3.853 E-07 3.913 E-06 D/Q 3.385 E-10 3.434 E-09 SW Distance (miles)

>5.0

>5.0

>5.0 0.79 0.62 Terrain licight (feet) 479 478 X/Q (undepleted) 7.489 E-06 1.166 E-05 X/Q (depleted) 6.346 E-06 1.003 E-05 D/Q 4.745 E-09 7.491 E-09 W5W Distance (miles)

>5.0

>5.0

>5.0 0.79 0.62

/'

Terrain IIcight (feet) 459 338 X/Q (undepleted) 7.660 E-06 1.191 E-05 X/Q (depleted) 6.699 E-06 1.172 E-05 D/Q 4.927 E-09 8.741 E-09 E ?1 i! a W

Distance (miles)

>5.0

>5.0

>5.0 0.76 0.62 g g-Terrain IIcight (feet) 758 558 gg X/Q (undepleted) 5.525 E-06 7.974 E-06 X/Q (depleted) 4.560 E-66 6.656 E-06 D/Q 3.694 E-09 5.425 E-09 e

w

TAlli.li Q I I.3-1 (con't)

YANKEE It0Wii:

I'RIMARY VENT STACK X/Q. D/Q val.Ill!5 F0lt SEl.liCTED RECEPTORS (ANNUAL)

Radial Milk Meat Milk Nearest Residence Site Sector Cow Animal Goat and Vegetable Garden Boundary hNW Distance (miles) 1.2 1.2 4.1 1.2 0.59 Terrain lleight ( feet )

997 997 1358 997 718 X/Q (undepleted) 1.41M E-06 1.418 E-06 2.150 E-07 1.418 E-06 4.888 E-06 X/Q (depleted) 1.139 E-06 1.139 E-06 1.529 E-07 1.139 E-06 4.108 E-06 D/Q l.171 E-09 1.171 E-09 1.564 E-10 1.171 E-09 4.208 E-09 m

NW Distance (miles)

>~.0

>5.0

>5.0 1.3 0.59 Terrain licight (fect) 997 718 X/Q (undepleted) 1.299 E-06 5.368 E-06 X/Q (depleted) 1.043 E-06 4.541 E-06 D/Q 1.285 E-09 5.564 E-09 NNW Distance (miles) 2.2 2.2 2.8 0.28 0.59 Terrain ifcight ( fect )

817 817 958 138 618 X/Q (undepleted) 7.384 E-07 7.384 E-07 5.127 E-07 2.379 E-06 6.395 E-tM X/Q (depleted) 5.639 E-07 5.639 E-07 3.813 E-07 2.367 E-06 5.372 E-06 D/Q 8.703 E-10 8.703 E-10 5.876 E-10 8.933 E-09 8.224 E-09 NNW Distance (miles)

    • l.8

~

Terrain lleight (feet) 818 X/Q (undepleted) 1.018 E-06 X/Q (depleted) 7.935 E-07 D/Q 1.226 E-09

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  • a a"
  1. ao 1

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    • Nearest off-site residence and vegetable garden

TABI.!! Q I1.3-2 YANKEli ROWii; TilitillNii ITUILDING VENT X/Q, D/Q VALUES 1 OR Sell:CTED RECEPTORS (ANNUAL)

Radial MiIk Meat MiIk Nearest Residence Site Sector Cow Animal Goat and Vegetable Garden Boundary N

Distance (miles) 3.8 3.8 55.0 2.9 0.59 Terrain licight (feet) 899 899 899 138 X/Q (undepleted) 2.644 E-07 2.644 E-07 3.881 E-07 4.290 E-06 X/Q (depleted) 2.135 E-07 2.135 E-07 3.216 E-07 3.912 E-06 D/Q 3.838 E-10 3.838 E-10 5.827 E-10 7.425 E-09 NNE Distance (miles) 4.9 3.3

>5.0 2.8 0.59 Terrain IIcight (feet) 1056 961 919 53S X/Q (undepleted) 1.522 E-07 2.691 E-07 3.535 E-07 3.659 E-06 X/Q (depleted) 1.217 E-07 2.237 E-07 2.984 E-07 3.361 E-06 0/Q l.966 E-10 3.645 E-10 4.879 E-10 5.709 E-09 NE Distance (miles)

>5.0 2.3

>5.0 2.3 0.85 Terrain !!eight (feet) 958 958 837 I

X/Q (undepleted) 3.735 E-07 3.735 E-07 1.564 E-06 X/Q (depleted) 3.161 E-07 3.161 E-07 1.404 E-06 D/Q 4.848 E-10 4.848 E-10 2.209 E-09 i

NE Distance (miles)

  • l.4 Terrain licight (fect) 919 X/Q (undepleted) 7.259 E-07 X/Q (depleted) 6.346 E-07 D/Q 9.860 E-10 EF ENE Distance (miles) 5.0 5.0

>5.0 3.7 1.1

)k Terrain licight (fect) 1191 1191 1191 899 "E

X/Q (undepleted) 7.508 E-08 7.508 E-08 1.174 E-07 7.180 E-07 O ?+

X/Q (depleted) 5.847 E-08 5.847 E-08 9.480 E-08 6.377 E-07 D/Q 9.056 E-ll 9.056 E-Il 1.483 E-10 1.041 E-09 G

l 5

-l

  • Summer Camp f

~

TABLE Q

.3-2 (con't)

YANKl;E ROWE: TURBINE BUILDING VENT X/Q. D/Q VALUES 1OR SELECTED RECEPTORS (ANNUAL)

Radial Milk Meat Milk Nearest Residence Site Sector Cow Animal Goat and Vegetable Garden Boundary ENE Distance (miles)

  • 1.8 Terrain licight (feet) 1056 X/Q (undepleted) 3.336 E-07 X/Q (depleted) 2.870 E-07 D/Q 4.602 E-10 E

Distance (miles) 3.6 3.6

>5.0 1.8 1.1 Terrain licight (feet) 997 997 978 938 X/Q (undepleted) 1.703 E-07 1.703 E-07 4.622 E-07 1.011 E-06 X/Q (depleted) 1.359 E-07 1.359 E-07 3.935 E-07 8.822 E-07 D/Q l.696 E-10 1.696 E-lC 5.026 E-10 1.147 E-09 ESE Distance (miles) 4.5 2.1

>5.0 2.1 1.3 Terrain Ifeight (feet) 919 919 919 918 X/Q (undepleted) 1.030 E-07 3.168 E-07 3.168 E-07 6.523 E-07 X/Q (depleted) 8.150 E-08 2.699 E-07 2.699 E-07 5.742 E-07 D/Q l.228 E-10 4.174 E-10 4.174 E-10 9.007 E-10 SE Distance (miles)

>5.0 1.9

>5.0 1.3 0.7 Terrain lleight (feet) 1017 1017 1018 X/Q (undepleted) 5.748 E-07 9.591 E-07 2.525 E-06 X/Q (depleted) 4.931 E-07 8.419 E-07 2.286 E-06 EfQ 8.263 E-10 1.431 E-09 3.983 E-09 E EI i! a SSE Distance (miles) 5.0 2.9

>5.0 1.2 0.59 gg Terrain Height (fect) 958 958 958 838 o

X/Q (undepleted) 2.155 E-07 4.760 E-07 1.692 E-06 5.040 E-06 yN X/Q (depleted) 1.649 E-07 3.889 E-07 1.481 E-06 4.560 E-06 D/Q 2.352 E-10 5.670 E-10 2.237 E-09 7.051 E-09

  • Summer Camp

TABI.E Q 4.3-2 (con't)

YANKEE ROWE: TURBINE BUILDING VENT X/ Q, D/Q VALUES FOR SELECTED RECEPT 0RS (ANNUAL)

Radial Milk Meat Milk Nearest Residence Site Sector Cow Animal Goat and Vegetable Garden Boundary S

Distance (miles)

>5.0 1.8

>5.0 1.4 0.59 Terrain lleight ( feet) 938 938 778 X/Q (undepicted) 1.445 E-06 2.017 E-06 7.606 E-06 X/Q (depleted) 1.218 E-06 1.731 E-06 6.830 E-06 D/Q l.344 E-09 1.919 E-09 7.699 E-09 SSW Distance (mil,es)

>5. 0

>5.0

>5.0 3.8 0.94 Terrain lleight (feet) 919 899 X/Q (undepleted) 5.099 E-07 3.819 E-06 X/Q (depleted) 3.981 E-07 3.359 E-06 D/Q 3.499 E-10 3.009 E-09 SW Distance (miles)

>5.0

>5.0

>5.0 0.79 0.62 Terrain licight (feet) 479 478 X/Q (undepleted) 5.795 E-06 8.389 E-06 X/Q (depleted) 5.153 E-06 7.540 E-d6 D/Q 3.964 E-09 5.814 E-09 WSW Distance (miles)

>5.0

>5.0

>5.0 0.79 0.62 Terrain licight (feet) 459 338 X/Q (undepleted) 5.930 E-06 8.539 E-06 X/Q (depleted) 5.288 E-06 7.698 E-06 D/Q 3.991 E-09 5.809 E-09

?N 3k W

Distance (miles)

>5.0

>5.0

>5.0 0.76 0.62 Terrain licight (feet) 758 558 "g

4.210 E-06 5.748 E-06

$3 X/Q (undepleted) 3.762 E-06 5.183 E-06 X/Q (depleted)

D/Q 3.080 E-09 4.245 E-09 E

TABLE Q

.3-2 (con't)

YANKliE HOWE: "DIRBINE BillLDING VENT X/Q, D/Q VAltlES FOR SEl.ECTE!) RECEPTORS (ANNUAL)

Radial Mill Meat Milk Nearest Residence Site Sector Cow Animal Coat and Vegetable Garden Boundary hNW Distance (miles) 1.2 1.2 4.1 1.2 0.59 Terrain lleight (feet) 997 997 1358 997 718 X/Q (undepleted) 1.200 E-06 1.200 E-06 2.025 E-07 1.200 E-06 3.491 E-06 X/Q (depleted) 1.050 E-06 1.050 E-06 1.590 E-07 1.050 E-06 3.159 E-06 D/Q 1.091 E-09 1.091 E-09 1.624 E-10 1.091 E-09 3.306 E-09 I

NN Distance (miles)

>5.0

>5.0

>5.0 1.3 0.59 Terrain lieight (feet) 997 718 X/Q (undepleted) 1.123 E-06 3.876 E-06 X/Q (depleted) 9.778 E-07 3.514 E-06 D/Q 1.219 E-09 4.480 E-09 NNW Distance (miles) 2.2 2.2 2.8 0.28 0.59 Terrain licight (fect) 817 817 958 138 618 X/Q (undepleted) 6.624 E-07 6.624 E-07 4.682 E-07 1.433 E-05 4.649 E-06 X/Q (depleted) 5.543 E-07 5.548 E-07 3.836 E-07 1.323 E-05 4.203 E-06 D/Q 8.666 E-10 8.666 E-10 5.946 E-10 2.105 E-08 6.801 E-09 NNW Distance (nilles)

    • 1.8 Terrain licight (feet) 818 X/Q (undepleted) 8.979 E-07 X/Q (depicted) 7.652 E-07 D/Q l.203 E-09

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~

~

as

    • Nearest off-site residence and vegetable garden

Tall!.li Q II.3-3 YANKEE ROWE:

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) 3.8 3.8

>5.0 2.9 Terrain !!eight (fect) 899 899 899 X/q (undepleted) 3.579 E-07 3.579 E-07 5.309 E-07 X/Q (depleted) 2.621 E-07 2.621 E-07 4.001 E-07 D/Q 3.530 E-10 3.530 E-10 5.393 E-10 NNE Distance (miles) 4.9 3.3

>5.0 2.8 Terrain licight (feet) 1056 961 919 X/Q (undepleted) 2.003 E-07 3.574 E-07 4.732 E-07 X/Q (depicted) 1.506 11-07 2.799 E-07 3.766 E-07 D/Q 2.072 E-10 3.855 E-10 5.185 E-10 NE Distance (miles)

>5.0 2.3

>5.0 2.3 Terrain lleight (feet) 958 958 X/Q (undepleted) 5.234 E-07 5.234 E-07 X/Q (depleted) 4.112 E-07 4.112 E-07 D/Q 4.557 E-10 4.557 E-10 NE Distance (miles)

    • 1.4 Terrain lleight (feet) 919 X/Q (undepleted) 1.053 E-06 X/Q (depleted) 8.593 E-07 D/Q 9.537 E-10 E?

ENE Distance (miles) 5.0 5.0

>5.0 3.7 EE Terrain licight (fect) 1191 1191 1191 N 0" X/Q (undepleteu, 1.026 E-07 1.026 E-07 1.620 E-07 v$

X/Q (depleted) 7.188 E-08 7.188 E-08 1.183 E-07 D/Q 7.918 E-Il 7.918 E-11 1.302 E-10 S

or

  • May through October
    • Summer Camp

TABLE Q 11.3-3 (con't)

YANKEE ROWE:

PRIMARY VENT STACK X/Q, D/Q VAlllES FOR SELECTED RECEPTORS (GROWING SEASON)*

Radial Milk Meat Milk Nearest Residence Sector Cow Animal Goat and Vegetable Garden ENE Distance (miles)

    • 1.8 Terrain licight (feet) 1056 X/Q (undepleted) 4.783 E-07 X/Q (depleted) 3.766 E-07 D/Q 4.159 E-10 E

Distance (miles) 3.6 3.6

>5.0 1.8 Terrain licinht (fect) 997 997 978 X/Q (undepicted) 2.193 E-07 2.193 E-07 6.177 E-07 X/Q (depicted) 1.546 E-07 1.546 E-07 4.711 E-07 D/Q 1.398 E-10 1.398 E-10 4.287 E-10 ESE Distance (miles) 4.5 2.1

>5.0 2.1 Terrain lleight (feet) 919 919 919 X/Q (undepleted) 9.997 E-08 3.169 E-07 3.169 E-07 X/Q (depicted) 7.192 E-08 2.482 E-07 2.482 E-07 D/Q 8.194 E-11 2.868 E-10 2.868 E-10 SE Distance (miles)

>5.0 1.9

>5.0 1.3 Terrain lleight ( fect) 1017 1017 X/Q (undepleted) 5.750 E-07 9.899 E-07 X/Q (depleted) 4.536 E-07 8.022 E-07 D/Q 6.498 E-10 1.151 E-03 EE 3(

SSE Distance (miles) 5.0 2.9

>5.0 1.2 Terrain lleight (feet) 958 958 958 "g

X,'Q (undepicted) 2.310 E-07 5.251 E-07 2.012 E-06 gg X/Q (depleted) 1.544 E-07 3.797 E-07 1.590 E-06 D/Q 1.960 E-10 4.831 E-10 2.026 E-09 g

5

  • May through October
    • Summer Camp

TABLE Q 11.3-3 (con' t)

~

YANKEE R0hT::

PRDtARY VEhT STACK X/Q, D/Q VALUES FOR* SELECTED RECEPTORS (GROWING SEASON)*

Radial Milk Meat Milk Nearest Residence Sector Cow Animal Goat and Vegetable Garden S

Distance (miles)

>5.0 1.8

>5.0 1.4 Terrain licight (feet) 938 938 X/Q (undepicted) 1.777 E-06 2.545 E-06 X/Q (depleted) 1.359 E-06

.l.988 E-06 D/Q l.294 E-09 1.894 E-09 SSW Distance (miles)

>5.0

>5.0

>5.0 3.8 Terrain IIcight (feet) 919 X/Q (undepleted) 5.961 E-07 X/Q (depleted) 4.229 E-07 D/Q 3.561 E-10 SW Distance (miles)

>5.0

>5.0

>5.0 0.79 Terrain lleight (fect) 479 X/Q (t.ndepictec

8.739 E-06 X/Q (depleted) 7.451 E-06 D/Q 5.555 E-09 WSW Distance (miles)

>5.0

>5.0

>5.0 0.79 Terrain lleight (fect) 459 X/Q (undepleted) 1.173 E-05 X/Q (depleted) 1.024 E-05 D/Q 7.368 E-09 ER W

Distance (miles)

>5.0

>5.0

>5.0 0.76 3k Terrain licight (fect) 758 "g

X/Q (undepleted) 8.770 E-06

$g X/Q (depleted) 7.235 E-06 D/Q 5.404 E-09

  • May through October 3

TABLE Q 11.a-3 (con't)

YANKEE ROWE:

PRIMARY VENT STACK X/Q, D/Q VAI.UES FOR-SELECTED RECEPTORS (GROWING SEASON)*

Radial Milk Meat Milk Nearest Resi.ence Sector Cow Animal Goat and Vegetable Garden WNW Oistance (miles) 1.2 1.2 4.1 1.2 Terrain I!cinht (fect) 997 997 1358 997 X/Q (undepleted) 1.917 li-06 1.917 E-06 2.913 E-07 1.917 E-06 X/Q (depleted) 1.530 E-06 1.530 E-06 2.050 E-07 1.530 E-06 D/Q l.291 E-09 1.291 E-09 1.726 E-10 1.291 E-09 NW Distance (miles)

>5.0

>5.0

>5.0 1.3 Terrain licight (feet) 997 X/Q (undepleted) 1.610 E-06 X/Q (depleted) 1.297 E-06 D/Q 1.215 E-09 NNW Distance (miles) 2.2 2.2 2.8 0.28 Terrain licight (feet) 817 817 958 138 X/Q (undepleted) 8.813 E-07 8.813 E-07 6.122 E-07 1.907 E-06 X/Q (depleted) 6.748 E-07 6.748 E-07 4.567 E-07 1.904 E-06 D/Q 7.973 E-10 7.973 E-10 5.387 E-10 4.791 E-09 NNW Distance (miles)

      • 1.8 Terrain licight (feet) 818 X/Q (undepleted) 1.216 E-06 X/Q (depleted) 9.495 E-07 D/Q 1.123 E-09 EN 2e n R*

jd

~

  • May through October y
      • Nearest off-site residence and vegetable garden

TABLE Q. 11.3-4 YANKEE ROWE: 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 N

Distance (miles) 3.8 3.8

>5.0 2.9 Terrain lleight ( fee t )

S99 899 899 X/Q (undepleted) 3.357 E-07 3.357 E-07 4.910 E-07 X/Q (depleted) 2.696 E-07 2.696 E-07 4.048 E-07 D/Q 3.G32 E-10 3.632 E-10 5.486 E-10 NNE Distance (miles) 4.9 3.3

>5.0 2.8 Terrain ileight (feet) 1056 961 919 X/Q (undepleted) 1.938 E-07 3.417 E-07 4.487 E-07 X/Q (depleted) 1.558 E-07 2.853 E-07 3.802 E-07 D/Q 2.147 E-10 3.942 E-10 5.258 E-10 NE Distance (miles)

>5.0 2.3

>5.0 2.3 Terrain lleight (feet) 958 958 X/Q (undepleted) 4.777 E-07 4.777 E-07 y/Q (depleted) 4.038 E-07 4.038 E-07 D/Q 4.545 E-10 4.545 E-10 NE Distance (miles)

    • l.4 Terrain lleigh: (feet) 919 X/Q (undepleted) 9.256 E-07 X/Q (depleted) 8.083 E-07 D/Q 9.176 E-10 F

ENE Distance (miles) 5.0 5.0

>5.0 3.7 6S Terrain licight (fect) 1191 1191 1191 "I

X/Q (undep!ated) 9.682 E-08 9.682 E-08 1.507 E-07 X/Q (depleted) 7.446 E-08 7.446 E-08 1.204 E-07 D/Q 8.204 E-11 8.204 E-11 1.336 E-10 E~

May through October

    • Summer Camp

TAlli.E Q 11. 3-4 (con't)

YANKEE ROKE; TURBINE BUILDINC VENT X/Q, D/Q VALUES FOR SELECTED RECEPTORS (GROWING SEASON)*

Radial Milk Meat Milk Nearest Residence Sector Cow Animal Goat and Vegetable Garden ENE Distance (miles)

'*I'8 Terrain lleight (feet) 1056 X/Q (undepleted) 6 E-07 X/Q (depleted)

D/Q 4

E Distance (miles) 3.6 3.6

>5.0 1.8 Terrain Ileight (feet) 997 997 978 X/Q (undepleted) 2.019 E-07 2.019 E-07 5.385 E-07 X/Q (depleted) 1.586 E-07 1.586 E-07 4.533 E-07 II/Q l.435 E-10 1.435 E-10 4.182 E-10 ESE Distance (miles) 4.5 2.1

>5.0 2.1 Terrain licight (feet) 919 919 919 X/Q (undepleted) 9.483 E-OS 2.878 E-07 2.878 E-07 X/Q (depleted) 7.408 E-08 2.431 E-07 2.431 E-07 D/Q 8.461 E-Il 2.851 E-10 2.851 E-10 SE Distance (miles)

>5.0 1.9

>5.0 1.3 Terrain lleight (feet) 1017 1017 X/Q (undepleted) 5.181 E-07 8.626 E-07 X/Q (depleted) 4.438 E-07 7.564 E-07 D/Q 6.447 E-10 1.110 E-09 NN SSE Distance (miles) d.0 2.9

>5.0 1.2 D *.

E Terrain licight (feet) 958 958 958 X/Q (undepleted) 2.146 E-07 4.709 E-07 4.709 E-07 1.645 E-06

$R X/Q (depleted) 1.604 E-07 3.783 E-07 1.425 E-06 D/Q 2.033 E-10 4.886 E-10 1.909 E-09 G

5 May through October

" Summer Camp

TAlli,li Q I I. 3-4 (con't)

YANKliE ROWE: TURBINE BUILDING VENT X/Q, D/Q VALUES FOR SELECTED RECEPTORS (CROWING SEASON)*

Radial Milk Meat Milk Nearest Residence Sector-Gow Animal Goat and Vegetable Garden S

Distance (miles)

>5.0 1.8

>5.0 1.4 Terrain licight (feet) 938 938 X/Q (undepleted) 1.545 E-06 2.157 E-06 X/Q (depleted) 1.303 E-06 1.851 E-06 D/Q 1.260 E-09 1.800 E-09 SSW Distance (miles)

>5.0

>5.0

>5.0 3.8 Terrain IIcight (fect)

X/Q (undepleted) 919 X/Q (depleted) 5.558 E-07 D/Q 4.361 E-07 3.677 E-10 SW Distance (miles)

>5.0

>5.0

>5.0 0.79 Terrain licight (feet) 479 X/Q (undepleted)

X/Q (depicted) 6.823 E-06 D/Q 6.089 E-06 4.647 E-09 WSW Distance (miles)

>5.0

>5.0

>5.0 0.79 Terrain lleight ( feet )

459 X/Q (undepleted)

X/Q (depleted) 9.081 E-06 D/Q 8.097 E-06 5.983 E-09 3c di

?8 W

Distance (miles)

>5.0

>5.0

>5.0 0.76 Terrain ileight (feet) 5h 758 X/Q (undepleted) gjg 6.664 E-06 X/Q (depleted)

D/Q 5.952 E-06

[;

4.460 E-09 y

May t hrough October

TABLE Q 11.3-4 (con't)

~

YANKEE ROWE:

TURBINE BUILDING VENT X/Q, D/Q VALUES FOR 8 ELECTED RECEPTORS (GROWING SEASON)*

Radial Milk Meat Milk Nearest Residencr Sector Cow Animal Goat

.and Vegetable Garien WNW Distance (miles) 1.2 1.2 4.1 1.2 Terrain lleight (feet) 997 997 1358 997 X/Q (undepleted) 1.608 E-06 1.608 E-06 2.737 E-07 1.608 E-06 X/Q (depleted) 1.401 E-06 1.401 E-06 2.134 E-07 1.401 E-06 D/Q l.191 E-09 1.191 E-09 1.796 E-10 1.191 E-09 NW Distance (miles)

>5.0

>5.0

>5.0 1.3 Terrairi lieinht ( feet )

X/Q (undepleted) 997 X/Q (depleted) 1.394 E-06 D/Q 1.214 E-06 1.152 E-09 NNN Distance (miles) 2.2 2.2 2.8 0.28 Terrain lleight (fect) 817 817 958 138 X/Q (undepleted) 7.930 E-07 7.930 E-07 5.608 E-07 1.698 E-05 X/Q (depicted) 6.645 E-07 6.645 E-07 4.598 E-07 1.569 E-05 D/Q 7.929 E-10 7.929 E-10 5.453 E-10 1.916 E-08 NNW Distance (miles)

      • l.8 Terrain ileight ( feet )

818 X/Q (undepleted)

X/Q (depleted) 1.075 E-06 D/Q 9.162 E-07 l.099 E-09 yg E3

. it i

May through October

      • Nearest off-site residence and vegetable garden

Am:ndm:nt 1 August 31, 1976 SECTION IV RADIOLOGICAL DOSE EVALUATION Paragraph (c) of 10 CFR Part 20.1 states that a licensee operating a light-water reactor (LKR) should make every reasonable effort to maintain releases of radioacitve materials to unlestricted areas as far below the limits specified in Part 20 as is reasonably achievable.

Appendix I to 10 CFR Part 50 provides guidance on the acceptable levels of exposure of the general public, resulting from routine radioactive material releases from LWR operations.

These exposure guidelines, which if met, establishes that the licensee is in complaince with 10 CFR Part 20.1 providing that none of the other limits established in Part 20 are exceeded.

This section describes the calculational dose models and assumptions which were used in establishing Yankee Rowe's compliance with 10 CFR Part 20.0 and the 10 CFR Part 50 Appendix I dose criteria of "as low as reasonably achievable".

The resultant individual radiation doses are based on realistic assessments of radioactive source terms, hydrologic and meteorologic dispersion factors and physically applicable exposure pathways that may or do exist within the site environment.

Site specific data is used when available, otherwise, the conservative assumptions of Regulatory Guide 1.109 recommended values are used in the dose determinations.

The calculated doses resulting from normal plant operation including anticipated operational occurrences are presented in this section and summari:ed in Tioles Q IV.1-1 through 0 IV.1-3.

IV-1

l

+

-Amsndmant 1 August 31, 1976 Radiation Doses from Liquid Effluent Pathways Yankee Rowe is a single reactor unit located on the 'Deerfield River, 42 river miles above its confluence with the Connecticut River.

The T

reactor' site is slightly upstream of Sherman Dam and adjacent to the pond of the Sherman hydroelectric station in the upper northwest corner of the State. of Massachusetts.

Sherman Pond provides the cooling and service water required for LWR operations.

Liquid discharges from the plant are-via an overflow weir discharge structure located approximately 125 feet from the Sherman Dam hydroelectric intake structure.

Yankee Rowe has a design circulating water flow of 138,200 gallons per_ minute. The Deerfield River has a 56 year annual average flow of 570 cubic feet per second at Sherman Dam.~

Table Q B.4-3 of Appendix B of this report is a listing of the liquid effluent isotopic source terms as generated by the GALE computer code. Appendix B also describes the plant's liquid effluent controls and operating parameters which were used to determine the potential source terms.

Exposure pathways that could exist as a result of-Yankee Rowe liquid effluent releases are fishing, direct exposure from river shoreline sedimentation, and milk andmeat via animal ingestion of the Deerfield 4

Hydrologic studies have shown that the Rowe discharge plume is-waters.

a surface plume that is. highly.affected by the operation of the Sherman hydroelectric. station.

When the'Sherman hydro-station is operating, the Rowe discharge plume is rapidly entrained and mixed with the hydro-station influx.

When the. hydroelectric station is inoperative, the plume moves up pond requiring approximately 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> before it impacts the closest i

IV-2

AmGndment 1 August 31, 1976 observed public fishing access.

Boat fishing in or near the Rowe discharge is extremely poor because (1) the pond bottom profile provides little food or cover for the fish species within the pond and (2) the species present show a decided preference for non-thermally impacted waters.

Public fishing access also exists about five miles downstream of Sherman Dam, just below the Fife Brook hydroelectric installation.

Public fishing has not been observed in the five mile section of the Dec. field as (1) the valley walls form a canal-like channel for the river with extremely steep banks and (2) the river water level fluctuates quite rapidly as a result of hydroelectric plant operations.

The fishing location chosen for evaluation is the downstream location as it is possible for Rowe effluent discharges to impact this fishing area in three hours.

This location is also used for evaluation of doses from shoreline sedimentation.

The aquatic invertebrate pathway is non-existant based on the results of several river biota surveys.

The cow milk-meat animal pathway may exist as a result of animal access to the Deerfield River.

Cattle have been observed to have access to the river bank about 16 river miles downstream of Sherman Dam and may have river a cess, although the river bank is extremely steep and brushy at this point.

Another animal herd that has easy access to the river is located 71.5 river miles downstream.

The cow milk-meat animal pathway has been evaluted at the 16 mile downstream location, The meat, milk and vegetable pathways via crop irrigation do not exist and are not likely to exist in the remaining years of plant lifetime because the type of farming practiced in the area is not economically IV-3

Amendment 1 i

August 31, 1976 s

amendable with irrigation.

Surveys have shown'that there is no water withdrawn from the Deerfield River for drinking purposes.

1 The calculational methods used in assessing the radiation dose to individuals have been taken from Regulatory Guide 1.109 for liquid exposures through aquatic food, shoreline. deposition, and milk cow-meat animal pathways. -The dilution factor to be used for calculational purposes for evaluation of the fishing pathway in either Sherman Pond 4

or the downstream Fife Brook installation is 1.85 which is equivalent i

to a mixing ratio of 0.54 Further downstream, increased water shed area provides additional water for dilution with a resultant dilution factor of 3.125 (equivalent mixing ratio of 0.32) used for the evaluation

]

of the milk cow-meat animal pathway.

i The human comsumption or usage factors which were used in the dose calculations for ingestion of fish were taken from i

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.

For internal doses due to ingestion of fish, an average 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 radionuclide decay during movement through the food chain, as well as during f

food preparation.

It_has also been assumed that.the fish which'are eaten had reached equilibrium with the water concentration of radioactivity.

l

. This assumption leads to conservatism in the calculation-since fish tend'

.to be very mobile and are not expected to remain for long periods near the

~

discharge.

IV-4

i Amendment 1 e

August 31, 1976 Shoreline activities have been evaluated using the model listed in Regulatory Guide 1.109 with the shore-width factor of 0.2 used as this pathway may exist at the downstream fisherman's Jocation.

Usage factors of 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> per year, 67 hours7.75463e-4 days <br />0.0186 hours <br />1.107804e-4 weeks <br />2.54935e-5 months <br /> per year, and 14 hours1.62037e-4 days <br />0.00389 hours <br />2.314815e-5 weeks <br />5.327e-6 months <br /> per year for adults, teenagers, and children, respectively, were used in the dose evaluations.

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 plume depletion during the transit of activity between the discharge point and the exposure locaticn.

Usage or consumption factors for milk and meat ingestion are those of Regulatory Guide 1.109, that is; 310 liters per year, 400 liters per year, and 330 liters for adult's, teenager's, and children's milk ingestion and 110 kilogram per year, 65 kilograms per year, and 41 kilograms per year for adult's, teenager's, and children's meat ingestion, respe'etively.

~

Transit or hold-up times of 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> and 20 days were used for milk and meat products, respectively.

The maximum external dose from shoreline activities as evaluated at the downstream fishing location is 1.23 x 10-2 millirem per year to the whole body and 1.43 x 10-2 millirem per year to the skin of a teenager spending 67 hours7.75463e-4 days <br />0.0186 hours <br />1.107804e-4 weeks <br />2.54935e-5 months <br /> per year at this location.

The external exposures from shoreline activities at the nearest downstream fishing access are given in Table Q IV.1-1.

The internal exposures from the meat, milk, and fish pathways are also summari:cd in the same table. The maximum calculated total whole IV-5

Amendment 1 August 31, 1976 body dose from internal and external exposures is 2.99 millirem per year to an adult who receives his meat and milk from the downstream cattle, his fish from the nearest downstream fishing location and occupies the nearest downstream fishing location for shoreline activities of 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> per year.

This calculated dose is within the Appendix I criteria

~

of three millirem per year. The critical organ dose is to the liver of the same adult with a maximum calculated annual dose of 4.03 millirem which is 40.3 percent of the Appendix I criteria of 10 millirem per year to any organ from all pathways.

The freshwater fish pathway is the critical internal exposure pathway for liquid effluents discharged from Yankee Rowe.

The fish pathway contributes 2.97 millirem of 2.99 millirem annual whole body dose and similar proportions of the other organ doses.

Cesium is the radionuclide of interest as it is the source of 98.9% of the total whole body dose and 99% of the total liver dose via the freshwater fish pathway.

Actual radioactive liquid releases at Yankee have been much lower that the GALE cc: puter code predicts and, therefore, the actual dose from the fish path-way is not expected to approach the value calculated above.

Fishing in the Deerfield River is largely put and take as fish stocked by the Massachusetts State Division of Fisheries and Game provides 90's of the downstream fish catch.

Fish caught in She nan Pond are usually stocked further upstream by the Vermont Department of Fisheries and Game and have been washed downstream to the pond.

Environmental samules(3) taken of the fish pathway have shown that there has been no buildup of radio-cesium in excess of background levels in fish samples taken from Sherman Pond and downstream areas of the Deerfield River.

Also, no credit has bon taken for the depletion of suspended radionuclides by deposition IV-6

i Amendment 1 August 31, 1976 l

processes wiille the water is in transit from the point of discharge to the point of exposure.

Radiation Ooses from Gaseous Effluent Pathways Gaseous effluent source terms have been calculated using the NRC GALE computer code for pressurized water reactors.

Table Q B.6-2 of Appendix B lists the quantities of nobic gases, iodines, and particulates which might be generated as annual gaseous releases based on the system description and operating parameters preststed 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, eight 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 Regulatory Commission's NUREG-0017.

The main release point for gases discharged from the plant is via the 150 foot tall primary vent stack, which is located between the vapor container and the primary auxiliary 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 dependent upon windspeed as described in Regulatory Guide 1.111 Meteorological dispersion of effluents was estimated by a straight-line airflow model applied to an inland valley site.

X/Q and D/Q values were (btermined in each sector for the nearest cow, goat, and meat animal out IV-7

I

-ma.

Amendment-1

~'

August. 31,-1976-f to a1 distance of 5 miles from the reactor.

A vegetable garden is

~

assumed to exist at each-location listed in Table Q I.2-l'of Section I of this' report except at site boundaries.

Each garden is assumed to

)

be large enough to produce enough food. to meet 76% of:the annual usage factor for fruits, vegetables, and grains for the age groups given in 1

Regulatory Guide 1.109, Table.A-2.

This garden is also assumed to produce 50% of the annual usage-factor for-fresh leafy vegetables for each age group listed. Table A-2 shows that the gross annual intake of fruits, vegetables, and grains is 520 Kg per year, 630 Kg per year, and 520 Kg per year.for children, teenagers, and adults, respectively; and of leafy vegetables of 26 Kg per year, 42 Kg per year, and 64 Kg per year for the same respective age groups.

X/Q and D/Q i

values were calculated from on-site meteorological data for both an-4 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, i

The following assumptions are used with those already given:

1.

All locations delinated in Table Q I.2-1 have gaIJens except the site boundary locations.

2.

The meat pathway exists at all milk locations.

3.

All fresh. leafy vegetables consumed during the growing season are grown locally 4.

The animal grazing season is six months per year.

5.

Milk cows receive 50'. of their food input from stored feeds U

during the grazing season.

6.

Milk goats receive 20's of their food input from stored feeds during the' grazing season.

1

.j IV-8 l

Amendment 1 August 31, 1976 7

Meat-animals do not receive stored feeds during the grazing season.

Both gamma and beta air doses were calculated for the receptor point of 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 the calculation' of X/O values at each receptor location.

The point of highest offsite exposure was determined to be at the west-southwest site boundary.

The gamma and beta air dose calculated at this location are 0.061 millirad per year and 0.37 millirad per year, respectively, and are thus below the Appendix I guideline gamma and beta air dose values of 10 millirad and 20 millirad 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 also be below these guideline values.

In additien 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's at all sites except summer camps and an attenuation factor of 0.7 to account for the dose reduction due to shielding provided by residential structures.

The summer camps are assumed to have an occupancy factor of 25% and doses were calculated using growing season meteorological data.

The calculational results indicate the the maximum whole body dose is 0.037 millirem per year for an individual located at the site boundary 0.62 miles west-southwest of the plant. The maximum skin dose is 0.21 millirem per year IV-9

t Amendment 1 n

August 31, 1976 for an individual located at the site boundary 0.62 miles west-southwest of the plant.

These doses are below the guideline values of five millirem per year for whole body dose and 15 millirem per year skin dose.

Table Q IV.1-2 indicates the annual gamma and beta doses calculated at the point of interest.

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 ground 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 1 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 meteo-rological data taken during the growing season.

Ground surface exposure, as well as inhalation doses were analy:cd using annual meteorological data.

Meat animals were assumed to receive their entire daily dietary intake from open pasture grass during the six-month gra:ing Milk cows were assumed to receive 50% of their intake from pasture i

season.

during this period.

This is a realistic assumption since most dairy operations are utilizing supplemental feeding of animal when on pasture or actually restrict animals to full-time silage feeding throughout the year.

IV-10

~-

~.-...

- -... -. ~.

.,t ;

i ^

~~

Amendment 1 August 31, 1976-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-level source while the-primary vent stack was analyzed as a mixed mode-release point-dependent upon windspeed conditions. The highest offsite dose was determined to be for a child living 0.79 miles to the west-southwest of the plant.

The l

critical organ was determined to be the thyroid and was primarily the i

result c' fresh and leafy vegetable' ingestion. This dose of 2.54 nillirem per year is 17% of. the 15 millirem per year criteria of Appendix I.

Table Q IV.1-3 indicates the total organ -doses from all gaseous pathways for the maximum dose locations, t

Conclusion 4

~

j The radio 1ogical evaluation of the principal exposure pathways in-the-

)

Yankee Rowe environment indicates that none of the criteria of 10 CFR i

Appendix I would be likely to be exceeded during normal operation of the plant.

Yankee Rowe as analyzed does-meet the "as low as reasonably achievable" criteria for radioactive effluents and is in compliance with Title 10 of the Code of Federal Regulations.

1 4

l l

r i

J l'

' IV-11'

.,e r

,,y y.,---

,,a v,

r-s

Amendment 1 August 31, 1976 SECTION IV REFERENCES 1.

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

Nuclear Regulatory Commission, March, 1976.

2.

" Calculation of Releases of Radioactive Materials in Gaseous and Liquid Effluents from Pressurized Water Reactors (Ph*R-GALE code)",

NUREG-0017, U.S. Nuclear Regulatory Commission.

3.

" Radiological Surveillance Studies at a Pressurized Water Nuclear Power Reactor", Bernd Kahn, et al, PB-205640, National Environmental Research Center, Cincinnati, Ohio, August 1971.

4.

" Methods for Estimating Atmospheric Transport and Dispersion of Gaseous Effluents in Routine R21 eases from Light-Water-Cooled-Reactors", Regulatory Guide 1.111, U.S. Nuclear Regulatory Commission, March 1976.

l

d TABLE Q IV.1-1 YANKEE ROWE LIQUID PATIIWAY DOSE

SUMMARY

FOR LIQUID EFFLUENTS Millirem per. year-External Dose from Total Shoreline Activities Internal Doses (

Age Whole

. Whole Whole Group Body Body Skin Bone Liver Body Thyroid Kidney Lung-GI-LLI Adult 2.99E+00*

2.20E-03

.2.57E-03 2.26E400 4.03E+00 2.99E+00 2.25E+00 1.40Et00 4.45E-01 2.18E-01 Teen 1.71E+00 1.23E-02 1.43E-02 2.24E+00 4.01E+00

1. 70E+00
2. 22E+00 -

1.08E+00 5.09E-01 1.63E,01 Child 6.73E-01 2.56E-03 2.99E-03 2.72E+00

'3.47E+00 6.71E-01 2.82E+00 4.71E-01

'4.02E-01 7.58E-02 Infant 2.44E-02 6.44E-02

'l.01E-01 2.44E-02 2.55E+00 1.29E-02 2.32E-02 1.50E-02 (1) 1 Consists of whole body external exposure from shoreline activities plus whole body dose from ingestion pathways.of fish, milk and meat.

(2)- Total dose to organ from ingestion pathways of fish, milk and meat.

it 0

o 2.99E+00=2.99x10

?N 2a.

T, &

yS J'

1 "i

i m.

s TABLE Q IV.1-2 YANKEE ROME GASEOUS PATilWAY DOSE SIM4ARY FOR NOBLE GAS EFFLUENTS LOCATION CAMMA AIR DOSE BETA AIR DOSE WiiOLE BODY DOSE SKIN DOSE

[ MRAD /YR)

(MRAD /YR)

(MREM /YR)

(MREM /YR)

Maximum site botmdary

'I

-2

-1

-2 0.62 miles WSW b.1 x 10 3.7 x 10 3.7 x 10 2.1 x 10 Maximum offsite resident

-2

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APPENDIX I DISTRIBtTIION AFTER ISSUANCE ACKNOWLEDGED OF A LICENSE 6

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