RG-1.21

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RG-1.21 RG-4.1
Steve Garry and Richard Conatser Presented at the
RETS-REMP WorkshopSouth Bend, IN 22-Jun-2009
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Introduction

• Rev 1 of RGs are 35 years old
• Rev 2 of RGs were just published
• We have made some changes
• We want to introduce the RGs
• The RGs are risk-informed
• We will present significant changes

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Outline - RG 1.21

• RG 1.21
• Release Points (and sample frequency)
• Principal Radionuclides (and LLD)
• C-14
• Leaks and Spills
• Dose Assessments
• ARERR

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Outline - RG 4.1

• RG 4.1
• REMP
• Exposure Pathways
• AREOR
• Conclusion

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Significant Release Point

• Identify your sig. release points
• Sample them appropriately
• Include them in your RECP
• Update the ODCM if necessary

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Significant Release Point

• Activity gt 1 of total for type of effluent
• 3 types of effluents listed in App I
• Liquid
• Gaseous Noble gases
• Gaseous Other (Iodine, Particulate, H-3)
• List Significant Release Points in ODCM
• Update the list periodically
• Update list if necessary
• Select data collection interval (e.g, 3 mo., fuel
  cycle)
• Update within 1 year if significant changes
  noted

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Less-significant Rel. Pt.

• Activity 1 of total for type of effluent
• 3 types of effluents listed in App I
• Liquid
• Gaseous Noble gases
• Gaseous Other (Iodine, Particulate, H-3)
• List in site documentation
• Purpose (benefit) of classification
• Discretion for sampling frequency
• Bounding calculation may be used
• Advantages with respect to Abnormal Releases

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Principal Radionuclide

• Identify your principal nuclides
• Analyze them appropriately
• Include them in your RECP
• Update the ODCM periodically

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Principal Radionuclide

• Activity gt 1 of total (for effluent type) OR
  Dose gt 1 of App I (for effluent type)
• 3 types of effluents listed in App I
• Liquid
• Gaseous Noble gases
• Gaseous Other (Iodine, Particulate, H-3)
• List Principal Nuclides in ODCM
• Update the list periodically
• Select data collection interval (e.g., 3 mo.,
  fuel cycle)
• Update within 1 year if significant changes
  noted
• Plant conditions may cause nuclide changes

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C-14

• Should be accounted for
• Can be estimated using NCRP-81 scaling factors,
  NUREG-0017, or measured
• Incorporated into dose estimates
• C-14 does not need to be monitored in REMP
  program

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RG 1.21 Leaks and Spills

• Survey and assess the hazard
• Report releases and discharges
• Anticipate future discharges
• Document in 50.75(g)
• Report in ARERR
• Releases outside SSC
• Discharges to unrestricted area
• Data from monitoring wells

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Abnormal Release

• Rev 1 used concept of abnormal release
• Abnormal unplanned or uncontrolled
• Rev 1 only addressed off-site discharges
• Rev 2 separates Releases Discharge
• Release is to areas outside SSC
• Discharge is to unrestricted area

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RG 1.21 Dose Assessments

• 10 CFR 50 Appendix I
• 10 CFR 20
• 40 CFR 190

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RG 1.21 Annual Report

• Supplemental Information
• Abnormal Releases
• Qtr and yearly totals in the tables
• Report all nuclides detected
• Report totals per RG 1.21 (3 digits)

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RG 4.1 - REMP

• RG 4.1 incorporates most concepts of NUREG-1301
  and 1302
• On-Site monitoring
• Surveys can be part of RG 1.21
• Surveys can be part of REMP
• May impact REMP (LUC, REMP)
• Meet 20.1501 and 50.75(g)

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RG 4.1 Exposure Pathways

• Release pts vs. exposure pathway vs routes of
  exposure
• Verify and update routes of exposure and sampling
  media
• See examples in RG 4.1
• Routinely monitored routes of exposure
• Include other routes of exposure if significant
• Significant if 10 of total

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RG 4.1 Exposure Pathways

• Exposure Pathways
• Routes of exposure
• Other significant routes of exposure (e.g.,
  recreational hunting)
• Gardens gt 50 m2 usage factor
• Apply usage factor to meat

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RG 4.1 - AREOR

• Meteorological data kept on file
• Analysis of impact of leaks and spills on REMP

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Questions? Comments?