ML23114A345
| ML23114A345 | |
| Person / Time | |
|---|---|
| Issue date: | 04/27/2023 |
| From: | Katherine Warner Decommissioning, ISFSI, and Reactor Health Physics Branch |
| To: | |
| References | |
| Download: ML23114A345 (1) | |
Text
NRC Oversight of Nuclear Plant Effluent Releases Katherine Warner, CHP April 27, 2023 1
NRC Oversight Highlights
- There are no releases directly from the spent fuel pool. Liquid batch releases, including water from the spent fuel pool, are treated by the radioactive waste system, recirculated, analyzed, and monitored prior to release.
- All effluent releases - whether liquid or gaseous - must meet conservatively established federal limits.
- Plant owners must comply with requirements in the NRC approved Offsite Dose Calculation Manual and must document effluent releases in annual reports submitted to the NRC.
2
3 Radiation Doses
Regulations - NRC 4
- Atomic Energy Act of 1954, as amended
- Radiation Safety Regulations Apply to ALL Licensees
- Dose limits basis and changes
5
6
Liquid Effluent Releases Controlled releases must meet both NRC and EPA regulations 7
8 0
50 100 150 200 250 0
1,000,000 2,000,000 3,000,000 4,000,000 5,000,000 6,000,000 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 NUMBER OF BATCH RELEASES VOLUME (GALLONS)
YEAR Number of Batch Liquid Releases and Volume
9 0.000126 0.001070 0.000749 0.000767 0.001149 0.000688 0.000748 0.000576 0.001375 0.000467 0.001247 0.00109 0.000784 0.001795 0.000589 0.000709 0.011966 0
20 40 60 80 100 120 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 Dose from Liquid Releases in millirem Year Comparison of Total Whole Body Dose from Liquid Releases to Limits Indian Point Note: values in the blue call-outs show the TOTAL whole-body dose for ALL radionuclides and ALL releases in that year NRC annual whole-body dose limit as found in 10 CFR 20.1301 EPA annual whole-body dose limit as found in 40 CFR 190 Typical whole-body dose from one transcontinental flight in the summer season (4 millirem)
10 0.000126 0.001070 0.000749 0.000767 0.001149 0.000688 0.000748 0.000576 0.001375 0.000467 0.001247 0.00109 0.000784 0.001795 0.000589 0.000709 0.011966 0
20 40 60 80 100 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 Dose from Liquid Releases in millirem Year Note: values in the blue call-outs show the TOTAL whole-body dose for ALL radionuclides and ALL releases in that year NRC annual whole-body dose limit as found in 10 CFR 20.1301 EPA annual whole-body dose limit as found in 40 CFR 190 Typical whole-body dose from one transcontinental flight in the summer season (4 millirem)
Radiological Environmental Monitoring Program 11
NRC Inspection Activities 12
Summary
- 5000 mrem/yr Occupational worker limit (10 CFR 20)
- 620 mrem/yr Average public dose/yr (NCRP 160)
- 100 mrem/yr Annual NRC public total effective dose limit (10 CFR 20)
- 25 mrem/yr EPA release limit (40 CFR 190)
- 3 mrem/yr ODCM (10 CFR 50 Appendix I)
- 0.011966 mrem Calculated dose to the public from liquid releases in 2021