ML21204A023
| ML21204A023 | |
| Person / Time | |
|---|---|
| Issue date: | 08/04/2021 |
| From: | Kevin Hsueh NRC/NRR/DRA/ARCB |
| To: | Binoy Desai, Anthony Dimitriadis, Steven Orth, Greg Warnick Decommissioning, ISFSI, and Reactor Health Physics Branch, Division of Reactor Safety II, Division of Reactor Safety III, Division of Nuclear Materials Safety IV |
| M. Smith | |
| References | |
| Download: ML21204A023 (5) | |
Text
August 4, 2021 MEMORANDUM TO:
Anthony Dimitriadis, Chief Decommissioning, ISFSI and Reactor HP Branch Division of Radiological Safety and Security Region I Binoy Desai, Chief Engineering Branch 3 Division of Reactor Safety Region II Steven Orth, Chief Plant Support Branch Division of Reactor Safety Region III Greg Warnick, Chief Reactor Inspection Branch Division of Nuclear Materials Safety Region IV FROM:
Kevin Hsueh, Chief /RA/
Radiation Protection and Consequence Branch Division of Risk Assessment Office of Nuclear Reactor Regulation
SUBJECT:
THREE-YEAR COLLECTIVE TOTAL EFFECTIVE DOSE EQUIVALENT PER REACTOR-YEAR FOR 2018-2020 MONITORING YEARS Enclosures 1 and 2 are provided for your use in planning inspections and dispositioning inspection findings. The Nuclear Regulatory Commissions (NRCs) Inspection Manual contains references to Three Year Rolling Average (TYRA) collective dose in the resource estimate section of Inspection Procedure (IP) 71124.02, Occupational ALARA Planning and Controls, dated January 1, 2020, and in Section IV of Inspection Manual Chapter (IMC) 0609, Appendix C, Occupational Radiation Safety Significance Determination Process, dated August 19, 2008.
IP 71124.02 directs inspection resources to be applied using a graded approach based on plant ranking by TYRA collective dose. The plants in the first quartile are usually assigned the lowest number of inspection hours, whereas the plants in the fourth quartile are usually assigned the highest number of inspection hours. Plants in the middle two quartiles typically receive the average number of inspection hours allowed by IP 71124.02. However, NRC inspection staff can adjust inspection hours as necessary to fulfill the objectives of the IP.
CONTACT: Micheal Smith 301-415-3763 When dispositioning performance deficiencies in the As Low As is Reasonably Achievable (ALARA) area, IMC 0609, Appendix C directs NRC staff to consider a licensees overall performance in maintaining occupational doses ALARA. This consideration is intended to direct potential NRC follow-on inspection resources, that would result from greater than Green inspection findings, to those programs with the largest challenges. The TYRA collective dose is a high-level indication of the radiological challenges encountered by an ALARA program.
Power reactor licensees are included as one of the seven categories of NRC licensees that are required by 10 CFR 20.2206 to report the results of individual monitoring that is required by 10 CFR 20.1502. Licensees may voluntarily include additional data for individuals for whom monitoring was provided but not required. The data provided in Enclosures 1 and 2 was extracted from the Radiation Exposure Information and Reporting Systemthe system the NRC uses to collect and store occupational exposure data. The TYRA is determined by summing the collective dose per reactor for the current year and the previous 2 years and then dividing this sum by 3, which is the number of years considered.
ML21204A023 NRR-106 OFFICE NRR/DRA/ARCB BC: RES/DSA/RPB BC: NRR/DRA/ARCB NAME MSmith JTomon KHsueh DATE 8/04/2021 8/04/2021 8/04/2021
THREE-YEAR COLLECTIVE TOTAL EFFECTIVE DOSE EQUIVALENT PER REACTOR-YEAR FOR BOILING AND PRESSURIZED WATER REACTORS 2018-2020
< Average 105.881 NOTE: Data does not include Duane Arnold, which closed on October 12, 2020.
Plant Name Three-Year Coll. TEDE per Reactor Year 2018-2020 Percent Change From 2017-2019 2017-2019 Quartile (if changed) 1st Quartile MONTICELLO 59.818
-34%
2 HATCH 1,2 60.440 8%
LIMERICK 1,2 65.853
-15%
SUSQUEHANNA 1,2 70.125
-7%
DRESDEN 2,3 73.929
-2%
2nd Quartile COOPER STATION 80.225 35%
1 CLINTON 83.287
-36%
3 COLUMBIA GENERATING 84.075
-39%
3 PEACH BOTTOM 2,3 85.875
-5%
QUAD CITIES 1,2 91.492 2%
3rd Quartile BRUNSWICK 1,2 94.291
-9%
2 HOPE CREEK 1 111.963
-4%
PERRY 120.692
-45%
4 RIVER BEND 1 120.973
-39%
4 BROWNS FERRY 1,2,3 131.739
-2%
4th Quartile NINE MILE POINT 1,2 132.619 17%
3 FITZPATRICK 134.964
-3%
LASALLE 1,2 140.158
-32%
GRAND GULF 143.189 77%
2 FERMI 2 318.338 45%
Average per Reactor-Year 105.881
-6%
THREE-YEAR COLLECTIVE TOTAL EFFECTIVE DOSE EQUIVALENT PER REACTOR-YEAR FOR BOILING AND PRESSURIZED WATER REACTORS 2018-2020
< Average 30.352 Enclosure 2 Plant Name Three-Year Coll. TEDE per Reactor Year 2018-2020 Percent Change From 2017-2019 2017-2019 Quartile (if changed) 1st Quartile PALO VERDE 1,2,3 13.056
-14%
PRAIRIE ISLAND 1,2 13.724
-15%
OCONEE 1,2,3 16.660 19%
BRAIDWOOD 1,2 DIABLO CANYON 1,2 18.330 18.901
-31%
-13%
2 BYRON 1,2 19.356
-22%
2 CALLAWAY 1 20.308
-6%
SEABROOK 20.989
-1%
BEAVER VALLEY 1,2 23.138
-10%
2 HARRIS 1 23.139 0%
2nd Quartile COMANCHE PEAK 1,2 24.247
-34%
3 FARLEY 1,2 24.385 12%
1 GINNA 25.411 0%
COOK 1,2 WATTS BAR 1,2 25.465 26.460
-16%
1%
MCGUIRE 1,2 27.430
-32%
3 INDIAN POINT 2,3 27.580
-32%
4 SUMMER 1 28.268
-19%
3 3rd Quartile CALVERT CLIFFS 1,2 28.376 3%
2 SOUTH TEXAS 1,2 29.233
-4%
2 VOGTLE 1,2 30.695 3%
2 CATAWBA 1,2 32.390 3%
POINT BEACH 1,2 32.618
-5%
MILLSTONE 2,3 32.707
-13%
NORTH ANNA 1,2 33.117 1%
DAVIS-BESSE 1 34.879 63%
1 SURRY 1,2 35.014
-8%
4th Quartile WATERFORD 3 36.000
-18%
TURKEY POINT 3,4 36.395
-10%
ROBINSON 2 37.262
-9%
ST. LUCIE 1,2 37.677
-5%
3 WOLF CREEK 1 39.996
-1%
SEQUOYAH 1,2 42.299 4%
ARKANSAS 1,2 46.195
-10%
SALEM 1,2 52.018 10%
PALISADES 151.607 23%
Average per Reactor-Year 30.352
-41%