ML093420376
| ML093420376 | |
| Person / Time | |
|---|---|
| Site: | Oyster Creek |
| Issue date: | 05/15/2009 |
| From: | Jason White NRC Region 1 |
| To: | Darrell Roberts NRC Region 1 |
| References | |
| FOIA/PA-2009-0214 | |
| Download: ML093420376 (3) | |
Text
6JR From: Ronald Bellamy Sent: Tuesday, May 12, 2009 2:01 PM To: Darrell Roberts; David Lew Cc: Marc Dapas; Richard Conte; John White; James Trapp
Subject:
RE: Oyster Creek Annual Ass. Mtg.
We are aligned and I will discuss with the site again Thursday. The meeting notice will use the general terms, following similar notices. Thx Ron From: Darrell Roberts Sent-. Tuesday, May 12, 2009 12:10 PM To: Ronald Bellamy; David Lew Cc: Marc Dapas; Richard Conte; John White; James Trapp
Subject:
Oyster Creek Annual Ass. Mtg.
- Ron, (b)(5)
I've cc'd the branch chiefs in DRS whol know are attending.
- thx, DJR 2
N6mitz, Ronald From:
Sent:
To:
Cc:
Subject:
Attachments:
John White Friday, May 15, 2009 1:34 PM Darrell Roberts Ronald Nlmitz; Ronald Bellamy; Harold Gray; John Richmond; Nancy McNamara RE: Oyster Creek Annual Ass. Mtg.
Dose Perspective Slide 2ocrevl.ppt From: Darrell Roberts Sent: Friday, May 15, 2009 12:33 PM To: Ronald Bellamy; Nancy McNamara Cc: David Lew; Richard Conte; John White; James Trapp; Diane Screnci; Nell Sheehan; Doug T"rft
Subject:
RE: Oyster Creek Annual Ass. Mtg.
- Folks, (b)(5) onmatiwin'this record As deleted' accordance with the Frdomoftnf~rmration t, exemptios_,.**
- i In in Ac Fr I
im
-do P These may be questions we should be prepared to address at our pre-brief next week w/ Sam.
I
Radiation Dose Perspective: Liquid Releases Estimated Background Exposure: 360 mrem/yr (NCRP 94)
The NRC and EPA have established three layers of radiation protection limits to protect the public against potential health risks from exposure to liquid radioactive releases (i.e., effluents that contain byproduct radioactive material, including tritium) from nuclear power plants. These limits apply to normal releases, e.g.,
planned discharges; and abnormal releases, e.g., spills and leaks.
La*eLr1: Liquid Effluent Limit (10 CFR 50 App I) - 3 mrem/yr, total body & 10 mrem/yr, organ The NRC selected the limits because they are a fraction of the natural background radiation dose, a fraction of the annual public dose limit, and an attainable objective that nuclear power plants could meet.
Layer 2: Public Dose Limit (40 CFR 190) - 25 mrem/yr Standard The EPA developed a radiation dose standard of 25 mrem/yr to the whole body, 75 mrem to the thyroid, and 25 mrem to any other organ of an individual member of.
the public. The NRC incorporated these standards into its regulations (10 CFR 20.1301(e)), and all nuclear power plants must now meet these requirements.
Specific to facilities involved in generating nuclear power.
Layer*3: Public Dose Limit (10 CFR 20.1301(a))- 100 mrem/yr The NRC adopted the dose limit from the recommendations of the International Commission on Radiological Protection (ICRP). The basis of the ICRP recommendation is that a lifetime of exposure at this limit would result in a very small health risk and is roughly equivalent to background radiation from natural sources (excluding radon). Applies to allfacilities (academic, industrial, medical, etc) that use radioactive material.
EPA Drinking Water Standards-Tritium (40 CFR 141.16)
Maximum contaminant level of 20,000 pCi/L for tritium (H-3) (based on a daily consumption of 2L, annually). This level is assumed to yield a dose of 4 mrem/yr.
Background Radiation vs. NRC Radiation Dose Limits 1I~
350 300-V 250+'
200-4' El Background
- NRC Public Dose Limit IM EPA Incorporated Public Dose Limit El Liquid Effluent Limit 150-4 1004' 50T]
mre m/yr