ML20207F954

Revised Offsite Dose Calculation Manual

ML20207F954
Person / Time
Site:	Susquehanna
Issue date:	09/12/1986
From:	Carson B, Graham B PENNSYLVANIA POWER & LIGHT CO.
To:
Shared Package
ML20207F643	List: ML20207F950 ML20207F954 PLA-2738, Forwards Monthly Operating Repts for Sept 1986 & Revised Offsite Dose Calculation Manual
References
PROC-860912-01, NUDOCS 8701060263
Download: ML20207F954 (10)

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PENNSTLVANIA POWS & LIGHT COMPANT SUSQUEBANNA STEAM ELECTRIC STATION OFFSITE DOSE CALCULATION MANUAL s

Prepared By hh. #W Date 9/M[h

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Reviewed By h w W . 6 Date 6 l:1)vt Approved By o SE

'Mariager-Nuclear Support Date h![2!b 8701060263 861013 SEP 121986 PDR ADOCK 05000007 R PDR

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TABLE OF CONTENTS P,aage Revision Date

1.0 INTRODUCTION

.................................. I 9/12/86 2 9/12/86 3 4/27/83

. 4 5/11/82 5 5/11/82 6 4/27/83 2.0 SETP0INTS..................................... 7 4/27/83 2.1 LIQUID EFFLUENT MONITORS.................. 7 4/27/83 8 10/25/83 8b 1/20/84 2.2 CASE 0US EFFLUENT MONITORS................. 9 11/22/85 9a 11/22/85 10 7/09/84 11 7/09/84 12 9/12/86 l 13 4/26/85 3.0 LIQUID EFFLUENT CONCENTRATION MEASUREMENTS.... 14 10/25/83 15 10/25/83 4.0 GASEOUS EFFLUENT DOSE RATE MEASUREMENTS....... 16 4/27/83 4.1 NOBLE GASES............................... 16 4/27/83 4.2 RADIONUCLIDES OTHER THAN NOBLE GASES...... 17 10/25/83 17A 4/26/85 18 4/27/83 19 4/27/83 20 4/26/85 5.0 INDIVIDUAL DOSE DUE TO LIQUID EFFLUENT........ 21 4/27/83 22 4/26/85 23 5/11/82 24 5/11/82 6.0 INDIVIDUAL DOSE DUE TO GASEOUS EFFLUENT....... 25 4/27/83 -

6.1 NOBLE CASES............................... 25 4/27/83 6.2 RADIONUCLIDES OTHER THAN NOBLE CASES...... 26 4/27/83 27 4/27/83 28 5/11/82 29 5/11/82 7.0 TOTAL D0SE.................................... 30 4/27/83 31 5/11/82 8.0 OPERABILITY OF WASTE TREATEMENT SYSTEMS....... 32 4/27/83 8.1 1,IQUID WASTE TREATEMENT. . . . . . . . . . . . . . . . . . . 32 4/27/83 8.2 GASEOUS WASTE TREATMENT................... 32 4/27/83 33 5/11/82

8. 3 SOLID WASTE TREA'INENT. . . . . . . . . . . . . . . . . . . . . 34 4/27/83 35 5/14/84 36 5/11/82 37 5/11/82 38 5/11/82 i

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9.0 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM. 39 7/12/82 9.1 DEFINITIONS............................... 39 7/12/82 9.2 MONITORING PR0 GRAM........................ 39a 4/26/85 9.3 CENSUS PR0 GRAM............................ 40 5/14/84 40a 7/12/82 41 11/22/85 42 11/22/85 43 9/12/861 44 5/11/82 45 9/12/861 46 5/11/82 47 5/11/82 48 4/27/83 10.0 DOSE ASSESSMENT POLICY STATEMENTS............ 49 10/28/85 50 9/12/86l APPENDIX A - SAMPLE CALCULATIONS OF ODCM PARAMETERS........................... A-1 11/22/85 A-2 11/22/85 A-2A 11/22/85 A-2B 11/22/85 A-3 7/09/84 A-4 7/09/84 A-4A -7/09/84 A-4B 7/09/84 A-4C 7/09/84 A-5 5/11/82 A-6 5/11/82 A-7 5/11/82 A-8 5/11/82 A-9 5/11/82 A-10 5/11/82 A-11 5/11/82 A-12 5/11/82 A-13 5/11/82 _

APPENDIX B - REPORTING REQUIREMENTS............... B-1 5/11/82 B-2 5/11/82 B-3 5/11/82 B-4 5/11/82 APPENDIX C - SITE SPECIFIC INFORMATION USED IN GASPAR....................... C-1 5/11/82 APPENDIX D - SITE SPECIFIC INFORMATION

. USED IN LADTAP....................... D-1 4/27/83 D-2 4/27/83 D-3 4/27/83 APPENDIX E - METHODS USED TO GENERATE NSI-4.6 DOSE RATE CALCULATION WORKSHEETS.......................... E-1 4/26/85 E-2 4/26/85 E-3 4/26/85 11 SEP 121986

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LIST OF TABLES g Revision Date Table 1 Radiological Effluent Objectives and Standards.... 6 4/27/83 Table 2 Dose Factors for Noble Gases and Daughters........ 17A 4/26/85 Table 3 Annual Average Relative Concentrations and Deposition Rates.................................. 18 5/11/82 Table 4 Dose Parameters for Radionuclides Other Than Noble Cases....................................... 20 4/26/85 Table 3 Liquid Dose Parameters for Adults................. 23 5/11/82 Table 6 Maximum Pathway Dose Factors Due to Radionuclides Other Than Ncble Gases.............. 28 5/11/82 Table 7 Operational Radiological Environmental Monitoring Program................................ 41 11/12/82 42 11/22/82 43 9/12/86 l Table 8 Detection Capabilities for Environmental Sample Analysis................................... 46 5/11/82 Table B-1 Radiological Environme'ntal Monitoring Program Annual Summary.................................... B-3 5/11/82 Table B-2 Reporting Levels for Nonroutine Operating Reports........................................... B-4 5/11/82 f

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1.0 INTRODUCTION

The purpose of this manual is to provide the parameters and methodology to be used in calculating offsite doses and effluent monitor setpoints at the Susquehanna Steau Electric Station, Units 1 and 2. Included are methods for determining maximum individual, whole body, and organ doses due to '

liquid and gaseous effluents to assure compliance with the dose limitations in the Technical Specifications. Methods are included for performing dose projections to assure compliance with the liquid and gaseous treatment system operability sections of the Technical Specifications. This manual includes the methods used for determining quarterly individual and population doses for inclusion in Effluent and Waste Disposal Semiannual Reports. Figure i shows the flow chart for performing offsite dose calculations.

The dose models consider two release modes: airborne and liquid. All gaseous effluents are treated as ground level releases. Airborne releases are further subdivided into two subclasses:

a. Radioiodines, Particulates, and Radionuclideo Other than Noble Gases -

4 In this model, a critical location is identified for assessing the maximum exposure to an infant and an adult for the various pathways k and to critical organs. Infant exposure occurs through inhalation and any actual milk pathway. Adult exposure derives from inhalation, assumed leafy vegetable and produce pathways, and any actual milk and meat pathways. Dose to each of the seven organs listed in Regulatory Guide 1.109 (bone, liver, total body, thyroid, kidney, lung, and 1

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sector. The largest of the organ doses in any sector is compared to 10 CFR 50, Appendix I design objectives. This dose calculation is performed monthly for infants and annually for adults. (The adult l dose is computed annually to confirm the premise that the infant is the critical person.) As necessary,.the release rates of these nuclides will be converted to dose rates for comparison to the limits of 10 CFR 20.

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For the noble gas setpoint, the calculated whole body and skin dose rates via the plume pathway are subject to the 10CFR20-derived limits of 500 and 3000 mrem /yr, respectively. The whole body dose rate limit is usually most restrictive. For particulates and for iodine-131, the maximum calculated organ dose via the inhalation pathway is subject to the limit of 1500 mres/yr.

4. The limiting release rates are converted to limiting vent concentrations uafng high limit vent flow rates.

Limiting Vent Concentration, uCi/cc =

(Limiting Release Rate, Ci/yr) (10E6uCi/C1)

(5.26E5 min /yr) (Vent Flow Rate, cc/ min)

Sample calculations of liquid and gaseous effluent monitor setpoints are presented in Appendix A.

Vent flow rates and sample flow rates are monitored and recorded for each i of the five SSES release points. The measured flow rates are used to calculate vent concentrations and release rates. Flow channel setpoints are set at approximately 10% and 90% of the calibrated sensor ranges to l _

provide indication of possibly abnormal flow rates.

The main condenser offgas pre-treatment monitor provides indication of offgas activity prior to input to the holdup system. Alarm setpoints are based on two times (HI) and three times (HI HI) the steady state full power offgas activity readings (" units" from log monitor). The DOWNSCALE setpoint is maintained at 2 units. The HI HI setpoint should not be see to exceed 3E5 uCi/see based on correlation of monitor response with sample analysis data, i

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TABLE 7 (Continued)

Number of Samples Sampling and Type and Frequency Exporure Pathways Collection Frequency of Analysis end/or Sample and Locations 7B Bell Bend - 1.2 mi SE Semiannually

• Gamma isotopic analysis Sadiment from semiannually.

Shsreline Semi-monthly when animals Gamma isotopic and I-131 MilkC** SE1 Bloss Farm - 4.4 mi. E analysis of each sample.

10D1 Ryman Farm - 3.0 mi SSW are on pasture, monthly 10G1 Davis Farm - 14 mi. SSW" otherwise 12B2 Shultz Farm - 1.69 mi. WSW 13E3 Dent Farm - 4.9 mi. W 1451 Stola Farm - 1.8 mi. WNW l Semiannually. One sample Gamma isotopic on Fish and Outfall area Invertebrates 2H Falls, Pa." from each of two recre- edible portions.

(Approximately 30 mi. NNE) tionally important species from any of the following families; bullhead catfish, sunfish, pikes, or perches.

At time of harvest Ga=== isotopic on Fcod Products 1101 Zehner Farm - 3.3 mi SW edible portions, vegetable s

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• The location of samples and equipment were designed using the guidance in the Branch Technical Position to NRC Reg. Guide 4.8, Rev. 1 Nov. 1979, Reg. Guide 4.8 1975 and ORP/SID 72-2 Environmental Radioactivity Surveillance Guide. Therefore, the airborne sampler locations were based upon X/Q and/or D/Q.

• • A dust loading study (RMS-TR-81-01) concluded that the assumption of 1 for the transmission correction factor for gross beta analysis of air particulate samples is valid. Air particulate samples need not be weighed to determine a transmission correction factor.

• • • If a milk sample is unavailable for more than two sampling period from one or more of the locations, a vegetation sample >

l ahall be substituted until a suitable milk location is evaluated. Such an occurrence will be documented in the REMP annual report, Control sample location.

b Temporary locations until compositor is installed in intake and discharge lines; then frequency changes to composite sample collected over one-month period and location changes to 6S6 intake line, 6S7 discharge line. The upstream sample vill be taken in the intake line and which is beyond significant influence of the discharges. The downstream sample will be taken to in the discharge line. The gg c There is no river water intake at Berwick for drinking water. See Susquehanna SES-ER-OL Appendix G, page RAD-3.1.

p. calculated dose for Danville to the infant thyroid was 0.13 arem per year. Therefore, there is no need to take a composite bs sample over two-week period and perform an I-131 analysis, d The sample collector will determine the species based upon availability, which may vary seasonally and yearly.

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Figure 7. Offsite Environmental Sampling Locations - Susquehanna SES.

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'I ' ,' ccepling at 4-hour _intGrv310 Gr3 not rGquircd fro 3 th3 SGTS v:nt whan the SGTS continuous vent monitor is out of service, provided that -

$ a. the Standby Gas Treatment System is not being used,

b. there are proper administrative controls in place to ensure that the required sampling will begin within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> if the treatment system is operated.

10.5- Effluent monitor alarm / trip setpoints calculated in accordance with the ODCM shall be considered upper limit values. Higher (less conservative) setpoints shall not be used, however lower (more conservative) setpoints may be used as required to maximize the .

utility of the monitor.

j- 10.6 Technical Specification 3.11.1.3 requires that the appropriate i

portions of the liquid wasta treatment system be operable and be used to reduce radioactivity in liquid wastes prior to their release when projected doses from each reactor unit to unrestricted areas would exceed 0.06 area to the total body or 0.2 area to any organ in a 31 day period. Appropriate treatment is defined as follows:

a. Filtration combined with domineralization is considered appropriate treatment for batches which yield projected doses greater than 6.45E-04 mrem to the total body or 2.15E-03 mrem to any organ.

b. Filtration alone is considered appropriate treatment for batches which yield protected doses less than or equal to 6.45E-04 mrem to the total body and 2.15E-03 mrem to any organ.

BASES I

The projected dose threshold values used are derived by dividing the site-total maximum projected doses without treatment (0.12 and 0.4 mrem) by 31 days and by 6, the maximum possible number of batches released per day, to yield per-batch dose action levels. The two levels of " appropriate" treatment are in place so as not to require _

application of demineralization for treating low activity, high conductivity water (e.g., from Circulating or Service Water leakage). This would increase the overall efficiency of the solid radwaste program while ensuring calculated doses remain at a j suitable fraction of 10 CFR 50 design objectives.

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