ML20073H346

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Radiation Dose Assessment Rept, 1990
ML20073H346
Person / Time
Site: Peach Bottom  
Issue date: 12/31/1990
From: Ballantine J, Miller D, Scholz R
PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
CCN-91-14061, NUDOCS 9105070076
Download: ML20073H346 (51)
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{{#Wiki_filter:_ _ _ _ _ _ _ _ _ _ _ _ CCN 91-14061 6 PillLADELPillA ELECTitlC COMPANY W l'i.ACil BUT'IUM A1DMIC l'OWI K VIATION R D 1, box 20M ~ p_ MY,. ! kilt Itnnsylvania l"31i PtXH 96)nt-THE Poeis of EXCEtitNCI ('t?) M V 014 D.11. Miner, Jr. Vice Premient April 30, 1491 Docket Nos. 50 277 50 278 Nuclear Regulatory Commission Document Control Desk Washington, DC 20555

SUBJECT:

Peach Bottom Atomic Power Station Units 2 and 3.1990 Radiation Dose Assessment Report Gentlemen: Attached is the Peach Bottom Atomic Power Station Radiation Dose Assessment Report for the period, January 1,1990 through December 31,1990. This report is submitted in accordance with the Technical Specification to operating licenses DPR 44 and 56, Section 6.9.2.h(3). The report indicates that PBAPS releases were a small fraction of the limits listed in 40 CFR 190, " Environmental Radiation Protection Standards for Nuclear Power Operation." If you have any questions regarding this matter, please call. Sincerely, ' IfOw, fe r D t; M,Itar @f DBM/AAF/pn6 s93 REL/MJB:jrf Enclosure ec: R.A. Burricelli, Public Service Electric & Gas T.M. Gerusky, Commonwealth of Pennsylvania J.J. Lyash, USNRC Senior Resident inspector R.I. McLean, State of Maryland T.T. Martin, Administrator, Region 1, USNRC H.C. Schwemm, Atlantic Electric J. Urban, Delmarva Power INPO Records Center 0# RIIPACA.WP5 M 05070076 901231 I l $DR ADOCK 05000277 von

3l, lf g q- -. 4 - PHIIADELPHIA ELECTRIC COMPANY PEACH BOTTOM ATOMIC POWER STATION. UNIT NOS. 2&3 DOCKET NOS. 50-277 AND 50-278 RADIATION DOSE ASSESSMENT REPORT NO. 6 JANUARY 1, 1990 THROUGH DECEMBER 31, 1990 SUBMITTED TO l THE UNITED STATES NUCLEAR REGULATORY COMMISSION PURSUANT TO FACILlTY OPERATION LICENSEE DPR-44 & DPR-56 1 I j - Prepared by:- 7 ~ gJ.W.Ballantine / Approved by: hW / lg R.J. Sclyflz - [; t

i 1. TABLE OF CONTENTS I I. INTRODUCTION AND

SUMMARY

II. STATION LOCATION III. PEACH BOTTOM LIQUID AND GASEOUS RADWASTE EFFLUENTS IV. HYDROLOGY AND METEOROLOGY V. LIQUID AND GASEOUS PATHWAY DOSE MODELS VI. RECEPTOR IDCATIONS AND USAGE FACTORS FOR ANNUAL DOSE EVALUATIONS VII. CALCULATED ANNUAL DOSES VIII. METEOROLOGICAL DATA IX. CONCLUSIONS X. REFERENCES

I. INTRODUCTION AND

SUMMARY

In accordance with the unique reporting requirement of Technical Specification 6.9.2_ applicable during the reporting period, this repv.c-summarizes the radiation doses due to radioactive effluent releases from Peach Bottom Atomic Power Station Units 2 and 3 for the period January 1, 1990, through December 31, 1990. Detailed discussion of the methodology utilized in the report has been provided in a previous report (1). Only in those cases where the methodology has been changed will it be discussed in detail. The radiation doses due to the release of radioactive materials during the reporting period were within 10CFR50 Appendix I limits and with 40CFR190 limits as indicated on Table I-1, Comparison of doses resulting from PBAPS Units 2 and 3 with 10CFR50 Appendix I Design Objectives. Specifically, the maximum offsite doce due to liquid releases was 6.40E-03 mrem; the maximum dose due to gaseous releases was 3.89E-01 mrem. Since PBAPS releases were well within applicable radioactive effluent technical specifications limits and were a small fraction of 10CFR50 Appendix I design objectives, it is concluded that PBAPS releases were a small fraction of 40CFR190, " Environmental Radiation Protection Standards for Nuclear Power Operation" limits. 1

TABLE I-1 COMPARISON OF DOSES RESULTING FROM PBAPS UNITS 2 AND 3 WITH 10CFR50 APPENDIX I' DESIGN OBJECTIVES MA'L MUM DOSE nESIGN OIk7ECTIVES FRONLPBAPS xEG. GUIDE 1.109 p0SE PATHWAY YALUE .t-of A A I Liquid Effluents a. Dose to. 4.24E-03. 0.71 3 arem/yr/ unit total body from all pathways b. Dose to any 6.40E-03 0.32 10 arem/yr/ unit organ from all pathways II Gaseous Effluents

  • a.

Gamma dose 9.14E-03 0.05 10 mrad /yr/ unit. in air b. Beta dose 6.08E-02 0.15 20 mrad /yr/ unit in air c. Dose to 6.34E-03 0.06 5 mram/yr/ unit total body of an individual d. Dose to skin 3.75E-02 0.13 15 mrem /yr/ unit of an individual e. Dose to any 3.89E-01 1.30 15 mrem /yr/ unit organ-from all pathways 10CFR50 Appendix I specifies dose from. noble gases only .for categories II (a,b,c and d). PBAPS. doses presented L for; items II (c and d) include noble gas and particulate l compon 3nts. 2 I l

II. STATION LOCATION Peach Bottom Atomic Power Station is located on the western shore of Conowingo Pond in York County, Pennsylvania. The station, two 3293 MWT boiling water reactors, is d.JecAbed in the Updated Final Safety Analysis Report (2). Conowingo Yond is the receiving stream for liquid radwaste effluents. III. PEACH BOTTOM LIOUID AND GASEOUS RADWASTE EFFLUENTS The release of radioactive materials in 11guld and gaseous affluents from PBAPS were reported in tne Peach Bottom Atomic Power Station Semi-annual Effluent Release Reports Nos. 28 and 29 (3 and 4). IV. HYDROLOGY AND METEOROLOGY A. HYDROLOGY Travel times and dilution factors were determined baced on the daily Conowingo Pond flows in 1990. Daily Pond flows were reviewed to determine a mean monthly Pond flow. Each daily flow value was assigned to one of three Pond flow regimes (5). The resulting daily travel times and dilution factors were then averaged to determine a monthly mean travel time and dilution factor for each receptor location. The travel times and dilution factors for those locations in conowingo Pond, where the highest doses were calculated, are listed in Table IV-1 for each monthly flow regime. B. METEOROLOGY Section VIII describes in detail the meteorology in the PBAPS region during 1990, affecting the atmospheric dispersion and the deposition of radionuclides from PBAPS gaseous radwaste releases. This meteorology was used.for the evaluation of PBAPS Units 2 and 3 gaseous releases. 3

TABLE IV-1 PEACH BOTTOM RECEPTOR IOCATION PARAMETERS FOR 1990 1500 Feet Down-Flow of Plant Discharge Glen Cove Conowingo Dan Chester Water Intake Travel Dilution Travel Dilution Travel Dilution Travel Dilution Time Factor Time Factor Time Factor Time Factor Month (hrs) (hrs) (hrs} (hrs) January 2.3 1.9 15.2 4.1 22.2 7.7 7.1 5.9 February 1.5 1.7 11.0 12.0 16.0 14.0 4.0 8.3 March 1.9 1.9 13.1 5.8 19.1 10.2 5.6 7.0 April 1.8 1.8 12.3 7.1 17.9 11.2 4.9 7.4 7.4 May 1.8 1.8 12.3 7.2 17.9 11.3 4.9 June 2.8 2.0 16.6 3.6 24.4 7.3 9.4 5.7 July 3.2 1.8 19.6 2.7 28.8 5.3 10.3 4.6 August 3.9 1.9 21.7 2.6 31.9 5.2 14.6 4.5 September 4.1 1.8 22.7 2.5 33.3 5.0 15.3 4.4 October 2.2 1.6 15.6 3.5 22.7 6.1 6.1 5.1 November 1.8 1.8 12.5 6.6 18.2 11.0 5.1 7.3 December 1.6 1.8 11.5 9.2 16.3 12.7 4.4 7.9 4 l

b V. - LIQUID AND GASEOUS PATHWAY DOSE M0pELS The1anximum annual doses to individuals:in unrestricted areas'which could result fron the affluent releases from PBAPS1were calculated according to the guidelines in USNRC Regulatory. Guide 1.109-(6) and thef vdels described therein.' Computer codes,- LADTAP and-GASPAR, which incorporate the computational models described in Regulatory Guide'1.109 and which were obtained from the NRC staff were used to perform the liquid and gaseous dose calculations respectively. j The liquid release pathways which were considered in making. these calculations included drinking water, aquatic foods, shoreline usage, swimming and boating. All pathways _were calculated-using the equations and dose factors provided in the LADTAP computer code. The gaseous release pathways which were considered included external. radiation-from the-air andLground, 3 inhalation and ingestion of-vegetation, meat,_ cow's milk l ~ and goat's milk. The inhalation and ingestion pathways i were evaluated for the. adult, teenager, child and infant age groups.- The dose calculation at each receptor was ~done:in'two. parts - a dose component resulting from the i Loff-gas stack and one from the building vents. These doses were-then summed.to yield a total' dose for each pathway -and organ. u 5

o e VI. RECEPTOR LOCATION AND USAGE FACTORS FOR ANNUAL DOSE EVALUATIONS A. Licuid releases The annual doses resulting for PBAPS liquid radwaste releases were calculated at various locations on conowingo Pond. The locations are shown in Figure VI-1. These locations were selected because they represent areas where the listed pathway activities are most likely to occur. The locations and pathways aret Location Number Name Pathways 1 1500 feet below discharge boating, fish 2 Chester Water Authority drinking water 3 Glen Cove boating, fish, shoreline, recreation, swimming 4 Conowingo Dam drinking water The City of Baltimore (location 5) withdrew drinking water from Conowingo Pond at an average of 2.5 days per month throughout 1990. However, since Conowingo Pond represents only a small fraction of the water supply for the City of Baltimore, any doses resulting from this pathway are much smaller than those estimated from drinking water at Conowingo Dam. No other liquid pathway usage and cons'.mption :ates used in these calculations changed from previous years (7). B. Gaseous Releases In order to assure that the location of the maximum off-site annual dose to each pathway resulting from PBAPS radioactive gaseous effluents was identified, annual doses at several locations were calculated. These included real locations of dairy pastures, and residences in each sector. Heat animal pastures were assumed te co-exist with dairy pastures. A dairy pasture survey was performed in 1990 which determined the pasture clossst to PBAPS in each sector. There was one herd of milk goats within five miles of PBAPS. No gaseous pathway usage and consumption rates used in these :alculation_ changed from previous years (8). 6

FIGURE VI. HOLTWOOD - DAM 4 g MT JOHNSON ISLAND PEACH BOTTOM l - ATOMIC POWER STATJON 2 PA, - STATE LINE V... i. L i. BROAD CREEK l. 3 7 s. s ~ ,3; CONOWINGO DAM'- y Locations at:which annualdoses to individuals resulting from PBAPS liquid-radwaste releases were evaluated._ 8 7 t.O' : '*,******j....-_-,..., .~ -+- - ~.. ~ - - -

\\. VII. CALCULATED ANNUAL DOSES A. Licuid Ralenses Tables VII-1 through VII-4 list the calculated annual doses through the various pathways to the maximum individual in the adult, teenager, child and infant age categories as a result of PBAPS liquid radwaste releases. The maximum calculated total body dose was 4.24E-03 mrem to the adult and occurred at Location 1, 1500 feet downstream from the PBAPS Discharge canal exit. This is 0.71% of the 10CFR50, Appendix I design objective. The maximum calculated dose to any organ was 6.40E-03 mrem to the teenager liver and also occurred at Location 1. This dose is 0.32% of the 10CFR50 Appendix I design objective. B. Gaseous Releases Tables VII-5 and VII-6 list the annual doses to all organs through pathway by age group at the location where a person would receive the largest calculated total body and organ dose respectively resulting from exposure to noble gases, particulates and iodine released from PBAPS. The maximum calculated total body dose was 6.35E-03 mrem to the child and occurred at a residence 3800 feet SSE from the PBAPS building vents. This dose is 0.06% of the-10CFR50 Appendix I design objective. The maximum calculated organ dose was 3.89E-01 mrem to the infant thyroid and occurred at a diary farm 6600 feet SSW from the PBAPS building vents. This dose is 1.30% of the 10CFR50 Appendix I design objective. The maximum calculated skin dose was 3.75E-02 mrem at a residence 14500 feet N from the PBAPS building vents. This dose is 0.13% of the Appendix I design objectives. The maximum offsite gamma air dose is 9.14E-03 millirad, located 15600 feet ESE from the FSAPS building vents. This dose is 0.05% of the 100FR50 Appendix I design objective. The maximum offsite beta air dose is 6.08E-02 millirad, located 14100 feet N from the PBAPS building vents. This dose is 0.15% of the 10CFR50 Appendix I design objective. 8 l l

e objective.. t The location where a person'would receive the largest calculated total body dose from exposure to PBAPS releases'due to non-occupational activities inside the site. boundary is at the boat ramp approximately 3300 t a feet NNW of the PBAPS building vents. The calculated. total body dose is 5.26E-05 mram and calculated skin dose is 1.31E-02 arem assuming continuous occupancy. Assuming the shoreline recreational usage factor (325 hours per year) would result in an even more insignificant dose. I l i L -l 1 1 4 l l L 9 l l

TABLE VII-I CALCULATED MAXIMUM ANNUAL DOSES TO ADULT RESULTING FROM PBAPS LIQUID RADWASTE RELEASES (mremfyear) Map No. Location Pettwey Skin Bone Lfver Totat Sr.x& thyroid Eldwy Ltre Cl-til 1 1500 ft. below Eating fish 0.00E+00 4.39E-03 6.19E-03 4.24E-03 6.3M-05 2.07E-03 6.6 X-06 9.21 -06 discharge Soeting 0.00E+09 2.92E-07 2.92E-07 2.92E-07 2.92E-0/ 2.92E-07 2.92E-07 2.92E-07 const exit Totat 0.00E+00 4.39E-03 6.19E-03 4.26E-03 6.39E-05 2.07E-03 6.63E-04 9.22E-06 3 Glen Cove Eattne Fish 0.00E+00 1.51E-03 2.06E-03 1.61E-03 2.02E-05 6.80E-06 2.20E-06 3.82E-04 Shorettne 7.88E-05 6.73E-05 6.73E-05 6.73E-05 6.73E-05 6.73E-05 6.73E-05 6.73E-05 Swissning 0.00E+00 4.73E-07 4.73E-07 4.T3E-07 4.73E-07 4.73E-07 4.73E-07 4.73E-07 soetIng 0.00E+00 1.0fE-07 1.01E-07 1.01E-07 1.01E-07 1.01E-07 1.01E-07 1.01E-07 Total 7.88E-05 1.58E-03 2.13E-03 1.48E-03 8.81E-05 7.48E-04 2.88E-04 4.50E-06 4 Conowingo Eatins Fish 0.00E+00 8.56E-06 1.18E-03 8.08E-04 1.17E-05 3.90E-04 1.26E-04 2.07E-06 Dam Drinkirg 0.00E+00 1.53E-05 1.65E-06 1.39E-06 1.65E-06 1.32E-06 1.27E-06 1.32E-M Fishing from den 0.00E+00 1.56E-07 1.56E-07 1.56E-07 1.56E-07 1.56E-07 1.56E-07 1.56E-07 Total 0.0M +00 8.71E-06 1.33E-03 9.47E-04 1.57E-04 5.22E-06 2.53E-06 3.39E-06 l l I 10

r 3 4 TABLE VII-2 CALCULATED MAXIMUM' ANNUAL. DOSES T0 TEEMGER RESULTING FROM PBAPS LIQUID RADMRSTE RELEASES, r ( W year)- peup me. Locetten PothueT Skin. Sene Liver Totet Safy fleyreld Klesy : Lwie St-Lil 1 '1500 ft. below : EstIng f feh 10.00E*SS - ' 4.67E45 - 6 AGE-85 ~ 2.4SE-ES - '3.71E-95 2.1M-85 T.M 6.94E-M < ,.i cdischerge. ' ScotIng ' O.00E*00

2.9N 2.9M 2.9M-9T 2.92E-87 2.92E ST ' 2.M4T.. '

2.92E-9T'" . canal eatt Yotet 0.00E*00 4.67E-95. 6.40E-85 ' 2.48E-05' 5.74E-95 2.12E-05 '7.95-M 6.94E-M ' i - l' 3 ' . Glen Cove: Eatins Fish.- 0.00E*00 1.62E-85 2.13E-95 S.32E-M.-.-1.79E-95 6.99E 4 2.42E-M ~ 2.9 6.T.y-M ; shoreline

7.88E-95

.6.73E 6.73E-95 6.73E-95 6.73E 6.73E-95, 6.73E 4 -95 : l-suleusing ' .0.00E*00 - 4.73E-97 4.73E-07 4.73E 4.73E-07 4.73E4T 4.73E 4.7f. -97 ' toetIng 0.00E*00 ' 1.01E-07 1.01E-9T _.1.91E-ST 1.01E-97.

1.01E-ST 1.91E-97 1.9s#97' Total
7.88E-05 1.69E-85 2.20E-05 9.seE-M S.58E-95' T.67E-M 3.30E-M 3.57E-M 4

!Conomingo Estles F1sh 1 ~ 0.00E*00 i' . Dee ' Drinking '1.49E ~ 9.10E-M 1.22E45 ' 4.90E-M. 1.S K-95 4.90E-M 1.49E-M - 1.44E-M .[ 9.48E-85: 9.58E-95 1.05E-M . 9.45E-95 9.94E-95 9.25E-95 4.75E-M - i - Fishing i' 'Totet" 1.49E-05 '1.00E-05 1.32E-05 5.95E-M 1.95E-M 4.91E-M. 2.4R-M 6.35E-M ! free due 0.00E*00 - -1.56E-97' 1.5dE-07 1.56E 1.54E-97 1.5eE4T

1. Set-ST 1.SeE-97 :

i i t f e-i 11 I: i: h = D T y ' i

4 TABLE VII-3 CALCULATED MAXIMUM ANNUAL DOSES TO CHILD RESULTING FROM PBAPS LIQUID RADWASTE RELEASES (mrem / year) Map No. Locetten Pethsey Shin Bone Liver Totet Body firyroid Kidwy time GI-tti 1 1500 ft. below Eating fleh 0.00C @ 5.86E-03 5.70E-03 1.1X-03 5.67E-05 1.81E-03 6.31E-M 2.74E-04 discheripe SoetIng 0.00E+00 1.63E-07 1.63E-07 1.6X-07 1.63E-07 1.63E-07 1.63E-07 1.63E-07 cenet exit Totet 0.00E+00 5.86E-03 5.70E-03 1.1X-03 5.69E-05 1.81E-03 6.31E-M 2.74E-M 3 Glen Cove Eating Fish 0.00E+00 2.02E-03 1.91E-03 3.92E-04 1.75E-05 6.03E-M 2.09E-M 1.15E-M Shoreline 3.40E-06 2.35E-06 2.35E-06 2.35E-06 2.35E-06 2.35E-06 2.35E-06 2.35E-06 BoetIng 0.00E+00 5.65E-06 5.65E-06 5.65E-06 5.65E-OS 5.63E-08 5.65E-08 5.65E-08 Totot 3.40E-06 2.02E-03 1.91E-03 3.96E-04 1.99E-05 6.05E-M 2.11E-04 1.17E-M 4 Conowingo Eating Ffeh 0.00E+00 1.14E-03 1.00E-03 2.21E-04 1.01E-05 3.42E-M 1.20E-04 6.21E-05 Osa Drfr*tne 0.00E+00 4.35E-05 2.09E-04 1.77E-04 2.10E-M 1.81E-04 1.7X-M 1.72E-04 Fishir-) fram due 0.00E+00 7.12E-09 7.12E-09 7.12E-09 T.12E-09 T.12E-09 7.12E-89 7.1 ~-09 fotet 0.00E+00 1.18E-03 1.29E-03 3.95E-04 2.20E-04 5.23E-04 2.93E-04 2.3 --04 l 12

a.. TABLE VII-4 CALCULATED MAXIMUM ANNUAL DOSES TO INFANT:RESULTING FROM PBAPS LIQUID RADWASTE RELEASES (mres/ year) soap me.. . tecetten - Pettmey - satin. sane - tivec .Totet sody rhyroid K f *ey,. tings sl-tt t. '4

Cenomines Delfdting 4.68E-05 '

2.14E-M 1.72E-M ' 2.31E-M 1.7JE-M-1.75E-M 1.73E-M i m r i r l l l l 1 l i 13

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, g 'e I VI!!. -METEOROLOGICAL DATA ^ The meteorology at the PBAPS site is evaluated by instruments on a meteorological tower on the bluff overlooking the plant. It is described in the-USFSAR (1). - All data are sumarized using-the Pasquill Gifford system. -The following three tables present the annu.i sumary of hourly meteorological-data joint frequency distributions' of wind speed, wind direction and atmospheric stability. t 4 f = F 16

DATA FROM 33 F00T LEVEL 17

..... = - a ~- -. _ .-....t un - -.. -, u-.. .n..~ Q. t e I E*

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q 0000000000000000 O-q0 l e C 4 k' h I O d 5 O09OO9000 OOC 000O 8 O _E _l E g. s =gw.w.www-aag= gag 3,.. e = c .W w-IN E E WE

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i 4 DATA FROM 75 F00T LEVEL \\ i 27

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I E <,i s I IX. CONCLUSION Table 11, introduction and Sunnary, sumarized the maximum calculated annual doses resulting from Peach Bottom Atomic Power Station Units 2 and 3 routine liquid and ateatpheric radwaste releases and how they comparetothe10CFR50 Appendix!designobjectivedoselimits. All calculated doses were extremely low and well within the 10CFR50 Appendix ! design objective dose limits. 5 k 47

en s P X. EILEREEIS 1. Philadelphia Electric Company, ' Peach Bottom Atomic Power Station Units 2 and 3. Radiation Dose Assessment Report No. 5*, January 1, 1989 through December 31, 1989. 2. Philadelphia Electric Company, ' Peach Bottom Atomic Power Station Units 2 and 3 Updated Final Safety Analysis Report.' 3. Philadelphia Electric Company, ' Peach Bottom Atomic Power Station Units 2 and 3. Semi Annual Effluent Releases Report No. 28', January 1, 1990 through June 30, 1990. 4. Philadelphia Electric Company, ' Peach Bottom Atomic Power Station Units 2 and 3, Semi Annual Effluent Releases Report No. 29", July 1, 1990 through December 31, 1990. 5. Philadelphia Electric Company, ' Peach Bottom Atomic Power Station Units 2 and 3, Semi Annual Effluent Dose Assessment",-September 30, 1990. 6. U. S. Nuclear Regulatory Comission, Regulatory Guide 1.109, ' Calculation of Annual Doses to Man from Routine Releases of Reactor Effluent for the Purpose of Evaluating Compliance with 10 CfR Part 50, Appendix l', Revision 1. October, 1977. 7. Philadelphia Electric Com)any, " Peach Bottom Atomic Power Station Units 2 and 3, Radiation 00se Assessment Report No. 5", January 1, 1989 through December 31, 1989, Table V 1. 8. Philadelphia Electric Company, ' Peach Bottom Atomic Power Station Units 2'and 3. Radiation Dose Assessment Report No. 5", January 1, 1989 through December 31, 1989, Table V 2. 48 - -}}

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