Document: NUREG-1555
Document ID: 07028c9f-5219-46b4-8c75-bb8fea4e2d2a
Document Type: esrp
Title: DESIGN BASIS ACCIDENTS
Source: NUREG-1555
Source URL: https://www.nrc.gov/reading-rm/doc-collections/nuregs/staff/sr1555/initial/
Revision Date: 2007-10
Chapter: 7
Section ID: 7.1
CFR Part: 
CFR Title: 

Content:
tified. (b) Verify that the applicant provides a justification (included in the EIS) for not estimating the consequences of any accident given in Appendix A to this ESRP. (2) Examine the applicant’s estimated doses for the appropriate accidents given in Chapter 15 of the SRP. Ensure that the applicant used a 50th percentile χ/Q value that was based on onsite meteorological data, or 10% of the levels given in Regulatory Guide 1.3 or Regulatory Guide 1.4, to represent more realistic dispersion conditions than assumed in the safety evaluation. (3) Determine that the calculation of dose consequences resulting from a DBA to verify that the applicant’s proposed exclusion area and low-population-zone distances are adequate to provide a high degree of protection of the public from a variety of potential plant accidents. For construction permit holders before January 10, 1997, a low population zone should be of such a size that an individual located at any point on its outer boundary who is exposed to the radioactive cloud resulting from the release during the entire period of the passage would not receive a total radiation dose to the whole-body in excess of 0.25 sievert (25 rem) or a total radiation dose in excess of 3 sieverts (300 rem) to the thyroid from exposure to iodine (10 CFR 100.11). For all other October 1999 7.1-5 NUREG-1555 applicants, the current siting regulations require an exclusion area of such a size that an individual located for any 2-hour period at the exclusion area boundary would receive a dose that would not be in excess of 0.25 sievert (25 rem) total effective dose equivalent (TEDE). A license to operate the facility would not be granted if the calculated exposures exceed the dose-guideline values. IV. EVALUATION FINDINGS The depth and extent of input to the EIS will be governed by the nature of the plant accidents and their impacts on the proposed project. The following information should be included: ` a general discussion of DBAs and the