ML13324A449
| ML13324A449 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 09/20/1984 |
| From: | SOUTHERN CALIFORNIA EDISON CO. |
| To: | |
| Shared Package | |
| ML13324A448 | List: |
| References | |
| PROC-840920, TAC-08101, TAC-59403, TAC-8101, NUDOCS 8410170235 | |
| Download: ML13324A449 (6) | |
Text
{{#Wiki_filter:* 0 Revised Pages Offsite Dose Calculation Manaul San Onofre Nuclear Generating Station Unit 1 6410170235 641015 PDR ADOCK 05000206 p PDR
2.4 Total Dose Calculations (3.17) 2.4.1 Total Dose to Most Likely Member of the Public The total annual dose or total dose commitment to any member of the public, due to releases of radioactivity and to radiation, from uranium fuel cycle sources within 5 miles of the site is calculated using the following expressions. This methodology is used to meet the dose limitations of 40 CFR 190 per twelve consecutive months. The transportation of radioactive material is excluded from the dose calculations. The total air dose is calculated as follows: DA = DAl AtB + DA23 AtB (2-13) where: DA = total air dose in mrem/year DA1 = Air dose for Unit 1 in mrem/year AtB =.ercent (decimal equivalent) meteorology in the beach sectors 2-38 Rev. 2 9-20-84
DA23 = Air dose for Units 2&3 in mrem/year. The total body liquid dose is determined by: DL = L1 + DL23 (2-14) where: DL = total body liquid dose in mrem/year DLi = total body liquid dose for Unit 1 in mrem/year for the past 12 consecutive months DL2 3 = total body liquid dose in mrem/year for Units 2 and 3 for the past 12 consecutive months The background dose to an individual member of the public is obtained by calculating the average quarterly TLD dose of those TLD's from 5 to 50 miles distant from the site. The background is subtracted from the highest quarterly reading beach TLD to determine the direct dose as given below: DD = -J(Dbeachi Dbkgi) (2-15) where: DD = direct dose in mrem/year 2-39 Rev. 2 9-20-84
0 Dbeachi = highest quarterly reading beach TLD in mrem for quarter i -Dbkgi = average quarterly TLD dose of those TLD's from 5 to 50 miles distant from the site in mrem for quarter i The total dose can now be determined by: DT = (DA + DD o + DL (2-16) where: DT = total dose in mrem/year DA = total air dose in mrem/year from Equation 2-13 DD = direct dose in mrem/year from Equation 2-15 T = beach occupancy factor which is equivalent to a beach occupancy time of 300 hours per year. DL = total body liquid dose in mrem/year from Equation 2-14 2-40 Rev. 2 9-20-84
2.4.2 Thyroid Dose The dose from gaseous effluents is calculated as follows: D= (DTI x AtB) + (DT2 3 x AtB) (2-17) where: DI = total thyroid dose from gaseous effluents in mrem/year DTI = thyroid dose from gaseous effluents for Unit 1 in mrem/year for the past 12 consecutive months DT2 3 = thyroid dose from gaseous effluents for Units 2 and 3 in mrem/year for the past 12 consecutive months AtB = percent (decimal equivalent) meteorology in the beach sectors The thyroid dose from liquid effluents is determined as follows: D = DTL1 + DTL23 (2-18) where: DTL = total thyroid dose from liquid effluents in mrem/year DTL1 = thyroid dose for Unit 1 from liquid effluents in mrem/year for the past 12 consecutive months 2-41 Rev. 2 9-20-84
DTL23 = thyroid dose for Units 2&3 from liquid effluents in mrem/year for the past 12 consecutive months ,Therthyroid dose from all effluents during the reporting period are calculated as follows: DTD =D + DTL (2-19) where: DTD = total thyroid dose in mrem/year D = thyroid dose from gaseous effluents in mrem/year DTL = thyroid dose from liquid effluents in mrem/year 2-42 Rev. 2 9-20-84}}