ML24170A763
| ML24170A763 | |
| Person / Time | |
|---|---|
| Issue date: | 06/25/2024 |
| From: | William Rautzen NRC/NRR/DRA/ARCB |
| To: | |
| References | |
| Download: ML24170A763 (42) | |
Text
NRCDose3 Update NRC NUREG/CR-2907 Bill Rautzen Health Physicist Radiation Protection and Consequence Branch Division of Risk Assessment Office of Nuclear Reactor Regulation June 25, 2024 ML24170A763 1
Topics
- What is NRCDose3
- Overview of Updates in
- NRC and Industry End Uses
- Documentation and Schedule for Release
- Annual Radiological Effluent Summary Reports NUREG/CR-2907 2
What is NRCDose3?
3
What is NRCDose3
- NRC code for evaluating doses for reactor licensing (applicants, licensees, NRC staff) and inspection activities
- Updates the 2012 NRCDose v2.3.20 code (version no longer maintained) 3
What is NRCDose3 (Contd)
- Graphical user interface (GUI) runs industry standard codes (with updates):
- LADTAP II (NUREG/CR-4013)
- GASPAR II (NUREG/CR-4653)
- XOQDOQ (NUREG/CR-2919)
- NRC guidance:
- RG 1.109 (exposure pathway dose calculations)
- RG 1.111 (atmospheric transport and dispersion)
- RG 1.113 (aquatic transport and dispersion) 4
Overview of Updates 6
Overview of Updates
- Addresses the need for a licensing tool to support reactor application submittals
- Provides an acceptable method for evaluating exposure pathway doses from reactor effluents
- Improves efficiency in reactor licensing process, and NRC safety and environmental reviews 5
Overview of Updates
- Improved functionality
- Updated Windows Graphical User Interface (GUI)
- User modifiable parameter values
- Bioaccumulation factors
- Consumption rates
- Usage factors
- Other parameters
- Options for ICRP-2, ICRP-30, and ICRP-72 Dose Conversion Factors (DCFs) 6
Overview of Updates
- Main Selection Screen 10
Overview of Updates
- Dose Conversion Factors (DCFs)
- ICRP-30 DCFs*
- ICRP-72 DCFs*
- Ingestion DCFs*: Gastrointestinal Absorption Fractions (f1)
- Inhalation DCFs*: Lung Clearance Classes for Chemical Compounds
- ICRP-30: D/W/Y
- ICRP-72: F/M/S
- DCF values obtained from Radiological Toolbox, NRC Radiation Protection Computer Code Analysis and Maintenance program (RAMP) at https://ramp.nrc-gateway.gov/
8
NRC and Industry End Uses 11
NRC and Industry End Uses
- NRC licensing reviews
- Design Certification, Combined License, and Early Site Permit Applications
- License Amendment Requests
- NRC health physics reactor inspections
- Independent assessment of potential doses from routine and accidental effluent releases
- Independent assessment of ODCM DCF and effluent dose calculations 15
NRC and Industry End Uses (Contd)
- Calculate doses at locations of interest other than ODCM
- Evaluate Land Use Census
- Public interest
- Annual dose assessments
- Actual river flows and dilutions
- Meteorology with effluents for evaluated year 16
Documentation and Release 14
Documentation and Release
- NRCDose3 code v1.1.4 (March 2024)
- Documentation - User Guide (Currently Draft),
Technical Documents, Release Notes, QA and Testing
- Distribution by NRC RAMP*
- FREE with user registration
- NRC RAMP at https://ramp.nrc-gateway.gov/
17
Annual Radiological Effluent Summary Reports NUREG/CR-2907 16
Annual Licensee Effluent Reports
- Annual Radioactive Effluent Release Reports (ARERRs) and Annual Radiological Environmental Operating Reports (AREORs) are posted on the NRC website:
https://www.nrc.gov/reactors/operating/ops-experience/tritium/plant-info.html 17
NUREG/CR-2907 Radioactive Effluents from Nuclear Power Plants
- The NUREG contains:
- Descriptions of the radioactive effluents
- Good visual depictions of effluents via graphs and tables
- The ability for the reader to quickly compare effluents from different nuclear power plants
- NUREG/CR2907s are posted on the NRC website at:
https://www.nrc.gov/reading-rm/doc-collections/nuregs/contract/cr2907/index.html 18
NUREG/CR-2907 Effluent General Categories
- Gaseous and Liquid Effluents
- Fission and Activation (Noble) Gases
- Particulates
- Effluent Trends
- Radiation Doses from Gaseous and Liquid Effluents 19
Liquid Tritium, 2022 20
DRAFT Table 3-12 BWR Liquid Releases - Tritium, 2022 Shown in Descending Order of Total Activity 21
DRAFT 22 Table 3-14 PWR Liquid Releases - Tritium, 2022 Shown in Descending Order of Total Activity
Carbon-14, 2022 23
DRAFT Carbon-14 24
- C-14 parameters vary based on power produced and consumption rates
- PWR activity ranges from 4-14 Ci (9.60 Ci median);
dose ranges from 6E 4.6 mrem (0.18 mrem median)
- BWR activity range is 7 - 23 Ci (14.2 median); dose ranges from 0.01 to 4.7 mrem (0.18 mrem median)
DRAFT Table 3-5 BWR Gaseous Releases - C-14, 2022 25 Shown In Descending Order Of Total Activity
DRAFT 26 Table 3-10 PWR Gaseous Releases - C-14, 2022 Shown In Descending Order Of Total Activity
Fission and Activation (Noble)
Gases, 2022 27
DRAFT Table 3-1 BWR Fission and Activation Gases, 2022 28 Shown in Descending Order of Total Activity
DRAFT Table 3-6 PWR Fission and Activation Gases, 2022 29 Shown in Descending Order of Total Activity
DRAFT Table 3-6 PWR Fission and Activation Gases, 2022, cont.
30 Shown in Descending Order of Total Activity
Effluent Trends, 2022 31
DRAFT Long-Term Trend in Noble Gases in Gaseous Effluents (~99.9% reduction) 32
DRAFT Long-Term Trend in Particulates in Liquid Effluents (~99% reduction or more) 33
Radiation Doses from Gaseous and Liquid Effluents, 2022 34
DRAFT Table 3-19 BWR Gaseous Effluents -
Maximum Annual Organ Dose, 2022 35 Shown in Descending Order of Organ Dose
DRAFT Table 3-20 PWR Gaseous Effluents -
Maximum Annual Organ Dose, 2022 36 Shown in Descending Order of Organ Dose
DRAFT Table 3-21 BWR Liquid Effluents -
Maximum Annual Total Body and Organ Dose, 2022 37 Shown in Descending Order of Organ Dose
DRAFT Table 3-22 PWR Liquid Effluents -
Maximum Annual Total Body and Organ Dose, 2022 38 Shown in Descending Order of Organ Dose
DRAFT Figure 3-21 Median Maximum Annual Organ Dose, Gaseous Effluents 5-Year Trend, 2018-2022 39
DRAFT Figure 3.22 Median Maximum Annual Dose, Liquid Effluents 5-Year Trend, 2018-2022 40
DRAFT Questions?
41
Contact Information 42 Bill Rautzen 301-415-7206 (office)
William.Rautzen@nrc.gov