ML20237C541

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Rev 16 to Offsite Dose Calculation Manual
ML20237C541
Person / Time
Site: Sequoyah  Tennessee Valley Authority icon.png
Issue date: 01/16/1987
From:
TENNESSEE VALLEY AUTHORITY
To:
Shared Package
ML20237C477 List:
References
PROC-870116, NUDOCS 8712210370
Download: ML20237C541 (13)
v • d • e


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l OFFSITE DOSE CALCULATION MANUAL CHANGES O

8712210370 871215 PDR ADOCK 05000327 R PDR

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1 0FFSITE DOSE CALCULATION MANUAL CHANGES

  • j REVISION NO. 16 l

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4 OFFSITE DOSE CALCULATION MANUAL REVISION 16 INSTRUCTIONS Replace pages.

enclosed the following pages of the Offsite Dose Calculation Manual with the The revised pages are identified by amendment number.

Remove Insert (front /back) (front /back)

Effective Page Listing / Dates of Revisions EPL-1/EPL-2 13/14 13/14 15/ISa 15/15a Table 1.5 Table 1.5 All pages associated with the Process Control Program (PCP)

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SEQUOYAH NUCLEAR PLANT

/'~'N OFF5.TE DOSE CALCULATION MANUAL (ODCM)

\ ) CONTROLLED COPY DISTRIBUTION I

%J Controlled Copy Number (s)

RIMS, MR AN 72A-C 1

CENTRAL OFFICE (24)

C. G. Robertson, Attn: RIMS, Document Control 2, 3, 4, 7, 8, 26, 39-45, Center, LP 4S 160D-C 47, 49-50, 52-53, 56, 90, 116-118 SEQUOYAH (37)

H. L. Abercrombie, Attn: Document Control Unit l 10, 57-61, 63, 65-78, 80-83, 85 WATTS BAR (3) l G. Toto, Attn: Document Control Unit 55, 88, 89 1

  • E. A. Belvin, LP SS 62E-C (2) 27, 28 E. S. Christenbury, E11 B33 C-K i

/~' 11

( Data Services Branch (Technical Records), 335 EB-K

\s 17 E. E. Driver, LAB-N )

19 J. L. Furgurson, 143 EB-K 13 M. Hines, 318 MPB-M 21 R. T. Joyce, 320 EB-K I 91

16 R. J. Pryor, 135 SPB-K i 18 f

J. A. Raulston, Attn: Sherry Dyer, W10 C126 C-K (8) 31-38 1

John Shipp, 6411 EBR-C k 1

15 K. W. Whitt, 716B EB-C 20 i

  • Revisions filed by Document Control Center 4

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TO  :

Distribution Center Clerk, LP 4S 1648-C FROM  :

DATE -

SUBJECT:

1 RECEIPT16 ACKNOWLEDGEMENT FOR OFFSITE DOSE CALCULATION MANU REVISION Iinhave received my controlled the(les) copy above of thereferenced Offsite Doserevision Calculationand haveinentered the revis Manual accordance with the instruction sheet provided.

subject revision have been removed and destroyed. Pages superseded by the Signature Offsite Dose Calculation Manual Copy Number (s)

I b.

SEQUOYAH NUCLEAR PLANT f OFFSITE DCSE CALCULATION MANUAL

/ ] EFFECTIVE PAGE LISTING i.

'%s f REVISION 16 l

l Page Revision TOC'l through TOC 2 Revision 15 1

2 Revision 6 3

Revision 14 4

Revision 12 Original 5

6 Revision 14 i 7

Revision 4 8 through 9 Revision 8 10 Revision 5 Revision 14 '

10a Revision 15 11 12 Revision 13 13 Revision 12 14 through 15a Revision 14 16 Revision 16 Revision 13 16a Revision 8 Table 1.1 (Page 1)

Revision 12 Table 1.1 (Page 2) Revision 15 i

Table 1.2 (2 pages) Original p Table 1.3 (8 pages) Revision 4 Table 1.4 Revision 12 Table 1.4A (removed from document)

Revision 9 Table 1.5 Revision 16 Tables 1.6 and 1.7 Revision 5 Table 1.8 (2 pages) Original Figures 1.1 and 1.2 Original Figure 1.3 17 Revision 3 Original 18 19 Revision 15 20 Revision 15 21 through 23 Revision 6 24 through 25 Revision 15 26 through 29 Revision 10 [

Revision 8 Table 2.1 (3 pages) Revision 7 Table 2.2 Revision 5 Table 2.3 (3 pages)

Revision 10 Table 2.4 a-c 30 Revision 5 Revision 13 30a Revision 15 Table 3.1.-1 (5 pages) Revision 13 Table 3.1-2 Revision 15 Table 3.1-3 Revision 13 Table 3.2-1 (3 pages) Revision 13 Figure 3.1-1 through 3.1-5 Revision 13 Figure 3.1-6 Figure 3.1-7 Revision 15 l \ Revision 14 EPL-1

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A O SEQUOYAH NUCLEAR PLANT OFFSITE DOSE CALCULATION MANUAL DATES OF REVISIONS l

Original ODCM 02/29/80*

Revision 1 04/15/80**

Revision 2 10/07/80**

Revision 3 11/03/80, 02/10/81 04/08/81, 06/04/81**

Revision 4 11/22/82 (10/22/81, 11/28/81, 04/29/82**)

Revision 5 10/21/82**

Revision 6 01/20/83**

Revision 7 03/23/83**

Revision 8 12/16/83**

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Revision 9 03/07/84**

Revision 10 04/24/84**

Revision 11 08/21/84**

Revision 12 02/19/85**

Revision 13 12/02/85 Revision 14 04/14/86 I Revision 15 11/05/86***

Revision l' 01/16/87**

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  • Low Power license for Sequoyah unit 1
    • RARC Hecting date
      • Date approved by RARC Chairman Revision 16 i

Step 2 r'~'N

( ) This methodology is to be used if the calculations in Step 1 yield doses

%.) that exceed 50 percent of the applicable limits.

Equations and assumptions for calculating doses to air from releases of noble gases are as follows:

Assumptions

1. Doses to be calculated are gamma and beta air doses.

2.

Doseistobeevaluatedatthenearestlandsiteboundarypointineachl14 sector.

3.

Historical onsite meteorological data from the period 1972-1975 will be used.

4 All measured radionuclides releases are considered.

5. A semi-infinite cloud model is used.
6. Radioactive decay is considered.
7. Building wake effects on effluent dispersion are considered.

B.

Dose factors are calculated using data from TVA's radionuclides library.

/m)

\ )

Equations

'^~

Equations for calculating air concentration, I, is the same as in Section 1.1.1, step 1, part A.

boundary in each sector. Air concentrations are calculated for the site For determinin5 the gamma dose to air Dyn = tm IniDFyg (1.16) i where:

D yn = gamma dose to air for sector n, mrad.

K ni = nir concentration of radionuclides i in sector n, pCi/m3 DFyia gamma-to-air dose1.5).

pCi/m3 (Table factor for radionuclides i, mrad /yr per tm = time period considered, yr

/N 1 \ ) Revision 14 i \,_,/ l e

F Yp For ' determining the beta doce to air:

r~

g% DBn"tm Xni DFBi ' (1.17) x/ where:

DB n a beta dose to air for sector n, mead.

xin a

air concentration of radionuclides i in sector n, pCi/m3 DFB[ = beta to air dose factor for radionuclido 1, mead /yr per pCi/m3 t

m = time period considered, yr The sector having the highest total dose is then uend to check compliance with specification 3.11.2.2.

1.2.2 lodines. Particulate, and Tritium Step 1 Doses will be calculated using the methodology described in this step. If 50 percent of the applicable limits are exceeded, step 2 will be performed.

Equations and assumptions for calculating doser from releases of iodines, particulate, and tritium are as follows:

l R16 Accumptions

1. Doses are to be calculated for the infant thyroid from allk ingestion and for the child bone and teen g.i. tract from vegetable ingestion.
2. Real cow locations are considered for the milk pathway and nearest resident-locations with home-use gardens are considered for the vegetable '

pathway.

3. The highest annual-average X/Q and D/Q based on 1972-1975 meteorological data for ground level releases will be used for ingestion pathway doses.
4. No credit is taken for radioactive decay.
5. Releases of H-3, 1-131, and I-133 are considered for the milk pathway.

H-3, Sr-89, Sr-90, Cs-134, and Cs-137 releases are considered for the R16 vegetable pathway to the child bone. H-3, Co-58, and Co-60 releases are considered for the vegetable pathway to the teen 8.i. tract.

6. The calculations extrapolate doses assuming that only 90 percent of the total dose was contributed. f J
7. The cow is assumed to graze on pasture grass for the whole year.

l Revision 16 i

Equations For determining the thyroid dose from milk ingestion:

I(Q iDFi )

D/Q x 106 + (QTDFT )X#9 DTH = i (1.18)

(0.9) x 3.15 x 107 where:

DTH = thyroid dose from H-3, 1-131, and 1-133, mrem.

Qi =

monthly release of iodine nuclide i, Ci.

QT

=

m nthly release of H-3, Ci '

DF =

nuclide i milk ingestion dose factor to infant, 7.24 x 1022 i mrem /yr per pCi/m 2

-s for 1-131 and 1.52 x 1020 mrem /yr per ,

pCi/m2-s for 1-133.*

DFT= H-3 milk ingestion dose factor, 3.53 x 10' mrem /yr per pCi/cc.*

D/Q = relative deposition rate, 2.96 x 10-'m 2 x/Q =

relative air concentration, 1.76 x 10-6 s/ma*

R16 0.9 = fraction of dose expected to be contributed by I-131 and I-133

( _,/ 3.15 x 107 = s/yr.

10' = pCi/Ci Equation 1.18 then reduces to:

DTH = 1.04x10 2o I Qi DF1 + 2.19 x 10

  • QT i

For determining the bone dose from vegetable ingestion:

E(QiDF i ) D/Q 106 + QTDFTX/Q (l*19)

DBC i

=i 3.15 x 107 (0.9) where:

DBC = bone dose to child, mrem.

Qi = monthly release of Sr or Cs nuclido 1, Ci.

QT = monthly release of H-3, Ci DFi = Vegetable ingestion dose factor to child, 2.25 x 1011, 1.36 x 1013, 1.59 x 1011, and 2.58 x 1011

~5 mrem /yr per pCi/m2-s for Sr-89, Sr-90, Cs-134, and Cs-137, respectively.*

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Revision 16 t

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DF

  • T = per vegetable pCi/cc.*

ingestion dose factor for H-3, 4.53 x 10' arem/yr

[

,, D/Q =.relativo deposition rate, 7.10x10-*m-2 x/Q = relative air concentration, 2.98 x 10-* s/m8 3.15x107 = s/yr.  !

10' = pCi/Ci.

j 0.9 = fraction of total bone dose expected to be contributed by )

H-3, Sr-89, Sr-90, Cs-134, and Cs-137.

Equation 1.19 then reduces to j

)

DBC = 2.50 x 10-2o0 1 Q1 DFt + 4.76 x 10-* QT i

For determining the gastrointestinal (g.1.) tract dose from vegetable ingestion: {

DGI T

t ) D/Q . 106 + (QTDF T ) x/Q (1.20)

(0.9) 3,15 x 107 i

where:

DGIT = teen s.1 tract dose from H-3, Co-58, and Co-60, mrom

\ Qi = monthly release of cobalt nuclide i, C1.

QT = monthly release of H-3, C1.

DF i = Vegetable ingestion 2dose factor for the teen g.i. tract, 3.87 x 10' mrem /yr per pC1/m -s for Co-58 and 3.31 x 1020 mrem /yr per pCi/ma -s for Co-60.*

DF T = vegetable ingestion dose factor for H-3, 2.92 x 10' mrem /yr per pCi/cc*.

D/Q = relative deposition rate, 7.10 x 10-' m-2 KQ / =

relative air concentration, 2.98 x 10-5 s/ms ,

3.15 x 107 = s/yr 105 = pCi/Ci 0.9 = fraction of total g.i. tract dose expected to be contributed by H-3, Co-58, and Co-60 Equation 1.20 then reduces to DGI T = 2.50 x 10-20 E (Qt Drt) + 3.07 x 10-* Q T i

-15a- Revision 16 '

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TABLE 1.5

's '

DOSE FACTORS

  • FOR SUBMERSION IN NOBI.E CASES R16 DFBI DF7 2 DFSI DFg 2 Kr-85m 1.17(+3)3 g,21(#3) - 1.46(+3) 3.86(+3)

Kr-85 1.61(+1) 1.69(+1) 1.34(+3) 3.83(+3)

Kr-87 5.92(+3) 6.05(+3) 9.73(+3) 2.01(+4)

Kr-88 1.47(+4) 1.50(+4) 2.37(+3) 5.72(+3)

Kr-88+D -

2.02(+4) ~

3.72(&4)

Kr-89 1.66(+4) 1.59(+4) 1.01(+4) 1.88(&4)

Xe-131m 9.15(+1) 1.53(+2) 4. 76(+2) 2.18(+3)

Xe-133m 2.51(+2) 3.17(+2) 9.94(+2) 2.90(+3)

Xe-133 2.94(+2) 3.46(+2) 3.06(+2) 2.06(+3)

Xc-135m 3.12(+3) 3.30(+3) 7.11(+2) 1.45(+3)

[\ Xe-135 1.81(+3) 1.88(+3) 1.86(+3) 4.84(+3)

Xe-137 1.42(+3) 1.48(+3) 1.22(+4) 2.50(+4)

Xe-138 8.83(+3) 9.00(+3) 4.13(+3) 9.25(+3)

Xe-138+D -

2.65(+4) -

2.81(+4)

Ar-41 8.84(+3) 9.76(+3) 2.69(+3) 5.54(+3) 4

1. meem/yr per pCi/m8
2. mead /yr pee pCi/m8
3. 1.17(+3) = 1.17 x 108
  • Based on methodology presented in " Meteorology and Atomic Energy," R16 D. H. Slade, Chapters 7-4 and 7-5, 1968.

Revision 16 i

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