1 RG-1.21 & RG-4.1 Steve Garry and Richard Conatser Presented at the RETS-REMP Workshop South Bend, IN 22-Jun-2009

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

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

4 Outline - RG 4.1 u RG 4.1 u REMP u Exposure Pathways u AREOR u Conclusion

5 Significant Release Point u Identify your sig. release points u Sample them appropriately u Include them in your RECP u Update the ODCM if necessary

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

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

9 Principal Radionuclide u Identify your principal nuclides u Analyze them appropriately u Include them in your RECP u Update the ODCM periodically

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

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

14 RG 1.21 – Leaks and Spills u Survey and assess the hazard u Report releases and discharges u Anticipate future discharges u Document in 50.75(g) u Report in ARERR: u Releases outside SSC u Discharges to unrestricted area u Data from monitoring wells

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

17 RG 1.21 – Dose Assessments u 10 CFR 50 Appendix I u 10 CFR 20 u 40 CFR 190

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

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

20 RG 4.1 – Exposure Pathways u Release pts vs. exposure pathway vs routes of exposure u Verify and update routes of exposure and sampling media u See examples in RG 4.1 u “Routinely monitored” routes of exposure u Include “other” routes of exposure if significant u Significant if ≥ 10% of total

21 RG 4.1 – Exposure Pathways u Exposure Pathways u Routes of exposure u Other significant routes of exposure (e.g., recreational hunting) u Gardens > 50 m 2 usage factor u Apply usage factor to meat

22 RG AREOR u Meteorological data kept on file u Analysis of impact of leaks and spills on REMP

23 Questions? Comments?